Merge pull request 'feat(auth): persist the trust token returned by the SSO exchange' (#29) from feat/sso-trusted-device into main

Reviewed-on: #29
Reviewed-by: Colby Whitlock <whitlocktech@gmail.com>

.gitea/scripts/gen_tree.py

@@ -0,0 +1,54 @@
+#!/usr/bin/env python3
+"""Render an ASCII tree of tracked files, read from stdin (one path per line).
+
+Used by the `sync-project-tree` workflow to regenerate this repo's PROJECT_TREE.md
+snapshot in the RunicGateway/docs repo. Feed it `git ls-files`:
+
+    git ls-files | python3 .gitea/scripts/gen_tree.py <root-label>
+
+Deterministic ordering: directories before files, each group sorted
+case-insensitively with the raw name as a tiebreak. Output uses the classic
+`tree(1)` box-drawing style so the result is stable across runs and platforms.
+"""
+import sys
+
+
+def build(paths):
+    root = {}
+    for p in paths:
+        p = p.strip().replace("\\", "/")
+        if not p:
+            continue
+        node = root
+        for part in p.split("/"):
+            node = node.setdefault(part, {})
+    return root
+
+
+def render(node, prefix, lines):
+    entries = list(node.items())
+    # directories (non-empty children dict) before files, then case-insensitive name
+    entries.sort(key=lambda kv: (0 if kv[1] else 1, kv[0].lower(), kv[0]))
+    for i, (name, child) in enumerate(entries):
+        last = i == len(entries) - 1
+        branch = "└── " if last else "├── "
+        suffix = "/" if child else ""
+        lines.append(f"{prefix}{branch}{name}{suffix}")
+        if child:
+            render(child, prefix + ("    " if last else "│   "), lines)
+
+
+def main():
+    try:
+        sys.stdout.reconfigure(encoding="utf-8", newline="\n")
+    except AttributeError:
+        pass
+    root_label = sys.argv[1] if len(sys.argv) > 1 else "."
+    tree = build(sys.stdin.read().splitlines())
+    lines = [f"{root_label}/"]
+    render(tree, "", lines)
+    sys.stdout.write("\n".join(lines) + "\n")
+
+
+if __name__ == "__main__":
+    main()

.gitea/workflows/release.yml

@@ -0,0 +1,194 @@
+# Automated release for the Runic Gateway Android app.
+#
+# Trigger: pushing a version tag `v*` (e.g. `v0.1.0`). Tag-driven on purpose — the
+# build never has to push to protected `main`; the tag *is* the release input.
+#
+# To cut a release:
+#   git tag v0.1.0 && git push origin v0.1.0
+#   (or create the tag from the Gitea UI). Re-build/re-release an existing tag via
+#   the workflow_dispatch input below.
+#
+# versionName = the tag without its leading `v`; versionCode = major*10000 +
+# minor*100 + patch (deterministic + monotonic, PLAN.md §10). Both are injected
+# into app/build.gradle.kts for the build only — nothing is committed back to main.
+#
+# Prerequisites (Settings -> Actions -> Secrets on RunicGateway/Android-app):
+#   REGISTRY_TOKEN  — Gitea access token with `write:repository` (create the release)
+#   ANDROID_KEYSTORE_BASE64    — base64 of the release .jks (single line)
+#   ANDROID_KEYSTORE_PASSWORD  — keystore password
+#   ANDROID_KEY_ALIAS          — key alias (e.g. runicgateway)
+#   ANDROID_KEY_PASSWORD       — key password (== store password for a PKCS12 keystore)
+#
+# Runner handling matches pr-checks.yml (self-hosted `ubuntu-latest`): the container
+# lacks git/curl/unzip and can't reach api.adoptium.net, so we apt-install the base
+# tools + JDK 17 (not actions/setup-java), install the exact SDK packages, and
+# `chmod +x ./gradlew` in-step (checkout drops the exec bit).
+
+name: Release APK
+
+on:
+  push:
+    tags:
+      - 'v*'
+  workflow_dispatch:
+    inputs:
+      tag:
+        description: 'Existing v* tag to (re)build and release'
+        required: true
+
+concurrency:
+  group: release-apk-${{ github.event.inputs.tag || github.ref_name }}
+  cancel-in-progress: false
+
+env:
+  GITEA_HOST: gitea.whitlocktech.com
+  REPO: RunicGateway/Android-app
+  GRADLE_MODULE: app
+
+jobs:
+  release:
+    runs-on: ubuntu-latest
+    # Fail fast on a genuinely wedged run (e.g. a stalled SDK/network download on
+    # the self-hosted runner) instead of hanging forever and — because concurrency
+    # is `cancel-in-progress: false` — blocking every later release behind it.
+    timeout-minutes: 30
+    steps:
+      - name: Install base tools + JDK 17
+        run: |
+          apt-get update
+          apt-get install -y git curl unzip jq openjdk-17-jdk-headless
+          echo "JAVA_HOME=/usr/lib/jvm/java-17-openjdk-amd64" >> "$GITHUB_ENV"
+
+      - name: Check out the release tag (full history for the changelog)
+        uses: actions/checkout@v4
+        with:
+          ref: ${{ github.event.inputs.tag || github.ref_name }}
+          fetch-depth: 0
+
+      # ── Derive version + changelog straight from the tag ─────────────────
+      - name: Plan the release (version + changelog from the tag)
+        id: plan
+        run: |
+          set -euo pipefail
+          mkdir -p dist
+          git fetch --tags --force >/dev/null 2>&1 || true
+
+          TAG="${{ github.event.inputs.tag || github.ref_name }}"
+          case "$TAG" in
+            v[0-9]*) : ;;
+            *) echo "::error::expected a v* version tag, got '$TAG'"; exit 1 ;;
+          esac
+          VERSION="${TAG#v}"
+
+          # versionCode: deterministic + monotonic from the semver (PLAN.md §10).
+          IFS=. read -r MA MI PA <<< "$VERSION"
+          : "${MA:=0}"; : "${MI:=0}"; : "${PA:=0}"
+          VERSION_CODE=$(( MA*10000 + MI*100 + PA ))
+
+          # Changelog: conventional-commit subjects since the previous v* tag.
+          PREV_TAG="$(git describe --tags --match 'v*' --abbrev=0 "${TAG}^" 2>/dev/null || true)"
+          if [ -n "$PREV_TAG" ]; then RANGE="${PREV_TAG}..${TAG}"; else RANGE="${TAG}"; fi
+          SUBJECTS="$(git log --no-merges --format='%s' $RANGE || true)"
+
+          {
+            echo "## Runic Gateway Android ${TAG}"
+            echo
+            FEATS="$(echo "$SUBJECTS" | grep -E '^feat'        || true)"
+            FIXES="$(echo "$SUBJECTS" | grep -E '^(fix|perf)'  || true)"
+            [ -n "$FEATS" ] && { echo "### Features";  echo "$FEATS" | sed 's/^/- /'; echo; }
+            [ -n "$FIXES" ] && { echo "### Fixes";     echo "$FIXES" | sed 's/^/- /'; echo; }
+            echo "### All changes"
+            if [ -n "$PREV_TAG" ]; then echo "Since ${PREV_TAG}:"; fi
+            echo "$SUBJECTS" | sed 's/^/- /'
+            echo
+            echo "---"
+            echo "Signed APK — sideload on Android 10+ (§10). The app self-configures its shard site on first run."
+          } > dist/CHANGELOG.md
+
+          echo "version=${VERSION}"          >> "$GITHUB_OUTPUT"
+          echo "versionCode=${VERSION_CODE}" >> "$GITHUB_OUTPUT"
+          echo "tag=${TAG}"                  >> "$GITHUB_OUTPUT"
+          echo "==> tag=${TAG} version=${VERSION} code=${VERSION_CODE} prev_tag=${PREV_TAG:-<none>}"
+
+      # ── SDK + signing keystore ───────────────────────────────────────────
+      - name: Set up Android SDK
+        uses: android-actions/setup-android@v3
+        with:
+          # Only put cmdline-tools on PATH. The action's default package set drags in
+          # the whole emulator + the legacy `tools` package (hundreds of MB, network-
+          # bound on this runner) that a headless APK build never uses. The next step
+          # installs exactly the packages we need.
+          packages: ''
+
+      - name: Install Android SDK packages
+        run: |
+          set +o pipefail
+          yes | sdkmanager "platform-tools" "platforms;android-35" "build-tools;35.0.0"
+
+      - name: Decode signing keystore
+        env:
+          ANDROID_KEYSTORE_BASE64: ${{ secrets.ANDROID_KEYSTORE_BASE64 }}
+        run: |
+          set -euo pipefail
+          if [ -z "${ANDROID_KEYSTORE_BASE64:-}" ]; then
+            echo "::error::ANDROID_KEYSTORE_BASE64 secret is not set — cannot build a signed release."
+            exit 1
+          fi
+          printf '%s' "$ANDROID_KEYSTORE_BASE64" | base64 -d > "${RUNNER_TEMP}/release.jks"
+          echo "ANDROID_KEYSTORE_FILE=${RUNNER_TEMP}/release.jks" >> "$GITHUB_ENV"
+
+      # ── Set the version, build the signed APK ────────────────────────────
+      - name: Set the app version to match the tag
+        run: |
+          set -euo pipefail
+          VERSION="${{ steps.plan.outputs.version }}"
+          VERSION_CODE="${{ steps.plan.outputs.versionCode }}"
+          # Replace only the version defaults (the `?: "x.y.z"` / `?: N` fallbacks).
+          sed -i -E "s/(\?: )\"[0-9]+\.[0-9]+\.[0-9]+\"/\1\"${VERSION}\"/" "${GRADLE_MODULE}/build.gradle.kts"
+          sed -i -E "s/(toIntOrNull\(\) \?: )[0-9]+/\1${VERSION_CODE}/"     "${GRADLE_MODULE}/build.gradle.kts"
+          grep -nE "versionCode = |versionName = " "${GRADLE_MODULE}/build.gradle.kts"
+
+      - name: Unit tests + signed release APK
+        env:
+          ANDROID_KEYSTORE_PASSWORD: ${{ secrets.ANDROID_KEYSTORE_PASSWORD }}
+          ANDROID_KEY_ALIAS: ${{ secrets.ANDROID_KEY_ALIAS }}
+          ANDROID_KEY_PASSWORD: ${{ secrets.ANDROID_KEY_PASSWORD }}
+        run: |
+          set -euo pipefail
+          chmod +x ./gradlew
+          ./gradlew --no-daemon :${GRADLE_MODULE}:testDebugUnitTest :${GRADLE_MODULE}:assembleRelease
+
+      - name: Package APK + SHA256SUMS
+        run: |
+          set -euo pipefail
+          SRC="${GRADLE_MODULE}/build/outputs/apk/release/app-release.apk"
+          test -f "$SRC" || { echo "::error::release APK not found at $SRC"; exit 1; }
+          cp "$SRC" "dist/runic-gateway-${{ steps.plan.outputs.version }}.apk"
+          ( cd dist && sha256sum "runic-gateway-${{ steps.plan.outputs.version }}.apk" > SHA256SUMS )
+          ls -l dist && cat dist/SHA256SUMS
+
+      # ── Create the Gitea release + upload assets (no push to main) ───────
+      - name: Create Gitea release and upload assets
+        env:
+          REGISTRY_TOKEN: ${{ secrets.REGISTRY_TOKEN }}
+        run: |
+          set -euo pipefail
+          TAG="${{ steps.plan.outputs.tag }}"
+          API="https://${GITEA_HOST}/api/v1/repos/${REPO}"
+          BODY="$(cat dist/CHANGELOG.md)"
+          CI_TOKEN="$(printf '%s' "${REGISTRY_TOKEN}" | tr -d '\r\n')"
+
+          REL_ID="$(curl -sSf -X POST "${API}/releases" \
+            -H "Authorization: token ${CI_TOKEN}" \
+            -H "Content-Type: application/json" \
+            -d "$(jq -n --arg tag "$TAG" --arg body "$BODY" \
+                   '{tag_name:$tag, name:$tag, body:$body, draft:false, prerelease:false}')" \
+            | jq -r '.id')"
+          echo "Created release ${TAG} (id=${REL_ID})"
+
+          for f in "runic-gateway-${{ steps.plan.outputs.version }}.apk" SHA256SUMS; do
+            curl -sSf -X POST "${API}/releases/${REL_ID}/assets?name=${f}" \
+              -H "Authorization: token ${CI_TOKEN}" \
+              -F "attachment=@dist/${f}" >/dev/null
+            echo "  uploaded ${f}"
+          done

.gitea/workflows/sonarqube.yml

@@ -0,0 +1,90 @@
+# Run SonarQube static analysis against the code that just landed on `main` and
+# report the results to the self-hosted SonarQube server for review. This is
+# intentionally NON-BLOCKING: it triggers on push to main (i.e. AFTER merge),
+# not on pull_request, so it never gates a PR. It complements pr-checks.yml
+# (which gates PRs) and release.yml (which ships the APK) — this one only feeds
+# the dashboard.
+#
+# Prerequisites (one-time, in the Gitea UI — Repo → Settings → Actions):
+#   • Secret   SONAR_TOKEN     — a SonarQube "Analysis" token generated at
+#                                My Account → Security in SonarQube for the
+#                                Runic-Gateway-Android-app project (or a global one).
+#   • Variable SONAR_HOST_URL  — the SonarQube base URL on your LAN, e.g.
+#                                http://192.168.0.56:9000
+#     (kept as a variable, not committed, so the internal address stays out of git.)
+#
+# The runner (self-hosted `ubuntu-latest`, same as the other workflows) must be
+# able to reach SONAR_HOST_URL on your network. Nothing here waits on the
+# SonarQube Quality Gate, so a failing gate does not fail this job — check the
+# dashboard when you want to.
+#
+# Scope: the Sonar scanner reads sonar-project.properties and analyses the Kotlin
+# source directly. Before the scan we run the JVM unit tests + JaCoCo so SonarQube
+# receives real coverage (sonar.coverage.jacoco.xmlReportPaths) — otherwise it
+# reports 0% and the coverage gate fails despite the test suite existing. That
+# Gradle step needs JDK 17 + the Android SDK (same toolchain as pr-checks.yml);
+# the runner container is bare, so base tools are apt-installed first.
+
+name: SonarQube
+
+on:
+  push:
+    branches: [main]
+  # Allow re-running the analysis on demand from the Actions tab.
+  workflow_dispatch: {}
+
+concurrency:
+  group: sonarqube-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  analysis:
+    runs-on: ubuntu-latest
+    steps:
+      # The bare runner container lacks git/curl/unzip (checkout + sdkmanager need
+      # them) and we install JDK 17 from the Ubuntu archive rather than
+      # actions/setup-java (this runner can't reach api.adoptium.net). Mirrors
+      # pr-checks.yml — see its header note.
+      - name: Install base tools + JDK 17
+        run: |
+          apt-get update
+          apt-get install -y git curl unzip openjdk-17-jdk-headless
+          echo "JAVA_HOME=/usr/lib/jvm/java-17-openjdk-amd64" >> "$GITHUB_ENV"
+
+      - name: Check out (full history for accurate new-code + blame)
+        uses: actions/checkout@v4
+        with:
+          # SonarQube uses git history to attribute issues to authors and to
+          # compute "new code". A shallow clone degrades both.
+          fetch-depth: 0
+
+      - name: Set up Android SDK
+        uses: android-actions/setup-android@v3
+
+      - name: Install Android SDK packages
+        run: |
+          set +o pipefail
+          yes | sdkmanager "platform-tools" "platforms;android-35" "build-tools;35.0.0"
+
+      - name: Cache Gradle
+        uses: actions/cache@v4
+        with:
+          path: |
+            ~/.gradle/caches
+            ~/.gradle/wrapper
+          key: gradle-${{ runner.os }}-${{ hashFiles('**/*.gradle.kts', 'gradle/libs.versions.toml', 'gradle/wrapper/gradle-wrapper.properties') }}
+          restore-keys: |
+            gradle-${{ runner.os }}-
+
+      # Produce the JaCoCo XML the scan reports as coverage. Scoped to the debug
+      # variant (matches enableUnitTestCoverage) to keep peak memory down.
+      - name: Unit tests + JaCoCo coverage
+        run: |
+          chmod +x ./gradlew
+          ./gradlew --no-daemon testDebugUnitTest jacocoTestReport
+
+      - name: Run SonarQube scan
+        uses: sonarsource/sonarqube-scan-action@v4
+        env:
+          SONAR_TOKEN: ${{ secrets.SONAR_TOKEN }}
+          SONAR_HOST_URL: ${{ vars.SONAR_HOST_URL }}

.gitea/workflows/sync-project-tree.yml

@@ -0,0 +1,111 @@
+name: sync-project-tree
+
+# Keeps this repo's file-layout snapshot (docs/android/PROJECT_TREE.md in the
+# RunicGateway/docs repo) current. On every push to `main` it regenerates the
+# tree from tracked files and, if it changed, opens (or force-updates) a pull
+# request against the docs repo. It never writes to the docs repo's `main`
+# directly. Auth reuses the same REGISTRY_USER / REGISTRY_TOKEN secrets the
+# other workflows use (the token needs repo read/write on RunicGateway/docs).
+
+on:
+  push:
+    branches: [main]
+  workflow_dispatch: {}
+
+concurrency:
+  group: sync-project-tree
+  cancel-in-progress: true
+
+env:
+  GITEA_HOST: gitea.whitlocktech.com
+  DOCS_REPO: RunicGateway/docs
+  SELF_REPO: RunicGateway/Android-app
+  DOCS_PATH: android/PROJECT_TREE.md
+  TREE_TITLE: Android App
+  ROOT_LABEL: android-app
+  PR_BRANCH: chore/sync-android-tree
+
+jobs:
+  sync:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out this repo
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 1
+
+      - name: Ensure python3 is available
+        run: |
+          set -euo pipefail
+          command -v python3 >/dev/null 2>&1 || { sudo apt-get update -qq && sudo apt-get install -y -qq python3; }
+
+      - name: Render PROJECT_TREE.md from tracked files
+        run: |
+          set -euo pipefail
+          mkdir -p _sync
+          {
+            printf '# %s — Project Tree\n\n' "${TREE_TITLE}"
+            printf '> **Auto-generated.** This file is maintained by the `sync-project-tree` CI workflow in\n'
+            printf '> the [`%s`](https://%s/%s) repository, which\n' "${SELF_REPO}" "${GITEA_HOST}" "${SELF_REPO}"
+            printf '> opens a pull request here whenever the tracked file layout on `main` changes. Do not edit\n'
+            printf '> by hand — changes will be overwritten by the next sync.\n\n'
+            printf 'A snapshot of the tracked files in the repository (build output, dependencies, and other\n'
+            printf 'git-ignored paths are excluded).\n\n'
+            printf '```text\n'
+            git ls-files | python3 .gitea/scripts/gen_tree.py "${ROOT_LABEL}"
+            printf '```\n'
+          } > _sync/PROJECT_TREE.md
+          echo "----- generated ${DOCS_PATH} -----"
+          cat _sync/PROJECT_TREE.md
+
+      - name: Open or update the docs PR if the tree changed
+        env:
+          REGISTRY_USER: ${{ secrets.REGISTRY_USER }}
+          REGISTRY_TOKEN: ${{ secrets.REGISTRY_TOKEN }}
+        run: |
+          set -euo pipefail
+          # Secrets can carry a trailing CR/LF depending on how they were pasted;
+          # strip line breaks before they land in a URL or Authorization header.
+          CI_USER="$(printf '%s' "${REGISTRY_USER}" | tr -d '\r\n')"
+          CI_TOKEN="$(printf '%s' "${REGISTRY_TOKEN}" | tr -d '\r\n')"
+          API="https://${GITEA_HOST}/api/v1/repos/${DOCS_REPO}"
+          REMOTE="https://${CI_USER}:${CI_TOKEN}@${GITEA_HOST}/${DOCS_REPO}.git"
+
+          git clone --depth 1 "${REMOTE}" docs_repo
+          cd docs_repo
+          git config user.name  "runic-docs-bot"
+          git config user.email "ci@whitlocktech.com"
+
+          mkdir -p "$(dirname "${DOCS_PATH}")"
+          cp ../_sync/PROJECT_TREE.md "${DOCS_PATH}"
+          git add "${DOCS_PATH}"
+          if git diff --cached --quiet; then
+            echo "PROJECT_TREE.md already up to date — nothing to sync."
+            exit 0
+          fi
+
+          SHORT_SHA="$(echo "${GITHUB_SHA:-local}" | cut -c1-7)"
+          git checkout -B "${PR_BRANCH}"
+          git commit -m "docs(tree): sync ${DOCS_PATH} from ${SELF_REPO}@${SHORT_SHA} [skip ci]"
+          git push --force "${REMOTE}" "HEAD:${PR_BRANCH}"
+
+          # Open a PR only if one isn't already open for this branch (a force-push
+          # to an existing open PR's head updates it in place).
+          OPEN="$(curl -sSf -H "Authorization: token ${CI_TOKEN}" \
+            "${API}/pulls?state=open&limit=50" \
+            | jq --arg b "${PR_BRANCH}" '[.[] | select(.head.ref == $b)] | length')"
+          if [ "${OPEN}" = "0" ]; then
+            curl -sSf -X POST "${API}/pulls" \
+              -H "Authorization: token ${CI_TOKEN}" \
+              -H "Content-Type: application/json" \
+              -d "$(jq -n \
+                    --arg head "${PR_BRANCH}" \
+                    --arg base "main" \
+                    --arg title "docs(tree): sync ${DOCS_PATH}" \
+                    --arg body "Automated project-tree sync from [\`${SELF_REPO}\`](https://${GITEA_HOST}/${SELF_REPO}), regenerated from tracked files on \`main\`. Merge once the layout looks right; the workflow will keep this branch current until then." \
+                    '{head: $head, base: $base, title: $title, body: $body}')" \
+              >/dev/null
+            echo "Opened a new docs PR for ${PR_BRANCH}."
+          else
+            echo "Existing open docs PR for ${PR_BRANCH} was updated via force-push."
+          fi

app/build.gradle.kts

@@ -1,5 +1,8 @@
 // SPDX-License-Identifier: GPL-3.0-or-later
 
+import java.io.FileInputStream
+import java.util.Properties
+
 plugins {
     alias(libs.plugins.android.application)
     alias(libs.plugins.kotlin.android)
@@ -7,8 +10,32 @@ plugins {
     alias(libs.plugins.kotlin.serialization)
     alias(libs.plugins.ksp)
     alias(libs.plugins.hilt)
+    jacoco
 }
 
+jacoco {
+    toolVersion = "0.8.12"
+}
+
+// Release signing material (PLAN.md §12) is never committed. It is read from, in
+// order of precedence: a local gitignored `keystore.properties` at the repo root,
+// then environment variables (how CI injects the decoded keystore + secrets). When
+// none is present, the release build is simply left unsigned — `assembleDebug` and
+// the PR gate are unaffected, so contributors without the keystore can still build.
+val keystorePropsFile = rootProject.file("keystore.properties")
+val keystoreProps = Properties().apply {
+    if (keystorePropsFile.exists()) FileInputStream(keystorePropsFile).use { load(it) }
+}
+fun signingValue(propKey: String, envKey: String): String? =
+    keystoreProps.getProperty(propKey) ?: System.getenv(envKey)
+
+val ksStoreFilePath = signingValue("storeFile", "ANDROID_KEYSTORE_FILE")
+val ksStorePassword = signingValue("storePassword", "ANDROID_KEYSTORE_PASSWORD")
+val ksKeyAlias = signingValue("keyAlias", "ANDROID_KEY_ALIAS")
+val ksKeyPassword = signingValue("keyPassword", "ANDROID_KEY_PASSWORD")
+val hasReleaseSigning = ksStoreFilePath != null && ksStorePassword != null &&
+    ksKeyAlias != null && ksKeyPassword != null
+
 android {
     namespace = "com.runicgateway.app"
     compileSdk = 35
@@ -18,20 +45,64 @@ android {
         applicationId = "com.runicgateway.app"
         minSdk = 29
         targetSdk = 35
-        versionCode = 1
-        versionName = "0.1.0"
+        // These committed defaults are the version source of truth (PLAN.md §10).
+        // release.yml's conventional-commit engine bumps versionName here and commits
+        // it on release; versionCode is derived from it (major*10000+minor*100+patch)
+        // so it stays monotonic. Both remain overridable via -P for local/manual builds.
+        versionCode = (project.findProperty("versionCode") as String?)?.toIntOrNull() ?: 1
+        versionName = (project.findProperty("versionName") as String?)?.takeIf { it.isNotBlank() } ?: "0.1.0"
 
         testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
+
+        // Android App Links host (docs/android/APP_LINKS.md). autoVerify needs a
+        // *literal* host at build time, so a single multi-tenant APK cannot verify
+        // open-ended shard domains: App Links are a build-time opt-in. Left empty for
+        // the generic build (custom scheme only); a white-label/first-party build
+        // bakes one host with `-PappLinkHost=play.myshard.com`.
+        //   • BuildConfig.APP_LINK_HOST — SsoAuthManager reads it to pick the redirect.
+        //   • manifestPlaceholder appLinkHost — substituted into the intent-filter host;
+        //     empty falls back to the reserved `.invalid` sentinel so the autoVerify
+        //     filter is inert (matches no real link, never verifies).
+        val appLinkHost = (project.findProperty("appLinkHost") as String?)?.trim().orEmpty()
+        buildConfigField("String", "APP_LINK_HOST", "\"$appLinkHost\"")
+        manifestPlaceholders["appLinkHost"] = appLinkHost.ifBlank { "runic-gateway.invalid" }
+    }
+
+    signingConfigs {
+        if (hasReleaseSigning) {
+            create("release") {
+                storeFile = file(ksStoreFilePath!!)
+                storePassword = ksStorePassword
+                keyAlias = ksKeyAlias
+                keyPassword = ksKeyPassword
+                // Sign with both v1 (JAR) and v2 (APK) schemes for broad compatibility.
+                enableV1Signing = true
+                enableV2Signing = true
+            }
+        }
     }
 
     buildTypes {
+        debug {
+            // Produce a JaCoCo .exec from JVM unit tests so SonarQube receives real
+            // coverage (§12.1). Debug-only: the scan analyses the debug variant.
+            enableUnitTestCoverage = true
+        }
         release {
-            // Signing/minification are wired at M6 (release hardening). Debug is auto-signed.
-            isMinifyEnabled = false
+            // R8 full-mode minify + resource shrink (§7: no offline cache, so a lean
+            // release APK). Keep rules live in proguard-rules.pro.
+            isMinifyEnabled = true
+            isShrinkResources = true
             proguardFiles(
                 getDefaultProguardFile("proguard-android-optimize.txt"),
                 "proguard-rules.pro",
             )
+            // Signed only when the keystore material is present (local or CI); an
+            // unsigned APK is produced otherwise. The direct-APK release (§10) runs
+            // through release.yml, which supplies the keystore from a Gitea secret.
+            if (hasReleaseSigning) {
+                signingConfig = signingConfigs.getByName("release")
+            }
         }
     }
 
@@ -93,6 +164,9 @@ dependencies {
     implementation(libs.androidx.datastore.preferences)
     implementation(libs.androidx.security.crypto)
 
+    // Web hand-off (Chrome Custom Tabs) for register / invite / reset / SSO (§4.2)
+    implementation(libs.androidx.browser)
+
     // Images
     implementation(libs.coil.compose)
 
@@ -106,3 +180,35 @@ dependencies {
     androidTestImplementation(platform(libs.androidx.compose.bom))
     androidTestImplementation(libs.androidx.compose.ui.test.junit4)
 }
+
+// JaCoCo XML coverage from the JVM unit tests, consumed by SonarQube (§12.1). Generated,
+// DI (Hilt), and Compose-scaffold classes are excluded so they don't dilute the number;
+// pure-@Composable UI is excluded on the Sonar side (sonar.coverage.exclusions) because
+// JVM unit tests can't execute composable bodies without Robolectric.
+tasks.register<JacocoReport>("jacocoTestReport") {
+    dependsOn("testDebugUnitTest")
+    group = "verification"
+    description = "Generates JaCoCo XML/HTML coverage for the debug unit tests."
+
+    reports {
+        xml.required.set(true)
+        html.required.set(true)
+    }
+
+    val coverageExcludes = listOf(
+        "**/R.class", "**/R$*.class", "**/BuildConfig.*", "**/Manifest*.*",
+        "**/*_Hilt*.*", "**/Hilt_*.*", "**/*_Factory*.*", "**/*_MembersInjector*.*",
+        "**/*_Impl*.*", "**/di/**", "**/*Module.*", "**/*Module$*.*",
+        "**/*ComposableSingletons*.*", "**/ComposableSingletons$*.*",
+    )
+    val buildDirFile = layout.buildDirectory.get().asFile
+    classDirectories.setFrom(
+        fileTree("$buildDirFile/tmp/kotlin-classes/debug") { exclude(coverageExcludes) },
+    )
+    sourceDirectories.setFrom(files("src/main/java", "src/main/kotlin"))
+    executionData.setFrom(
+        fileTree(buildDirFile) {
+            include("outputs/unit_test_code_coverage/debugUnitTest/testDebugUnitTest.exec")
+        },
+    )
+}

app/licenses/Cinzel-OFL.txt

@@ -0,0 +1,93 @@
+Copyright 2020 The Cinzel Project Authors (https://github.com/NDISCOVER/Cinzel)
+
+This Font Software is licensed under the SIL Open Font License, Version 1.1.
+This license is copied below, and is also available with a FAQ at:
+http://scripts.sil.org/OFL
+
+
+-----------------------------------------------------------
+SIL OPEN FONT LICENSE Version 1.1 - 26 February 2007
+-----------------------------------------------------------
+
+PREAMBLE
+The goals of the Open Font License (OFL) are to stimulate worldwide
+development of collaborative font projects, to support the font creation
+efforts of academic and linguistic communities, and to provide a free and
+open framework in which fonts may be shared and improved in partnership
+with others.
+
+The OFL allows the licensed fonts to be used, studied, modified and
+redistributed freely as long as they are not sold by themselves. The
+fonts, including any derivative works, can be bundled, embedded, 
+redistributed and/or sold with any software provided that any reserved
+names are not used by derivative works. The fonts and derivatives,
+however, cannot be released under any other type of license. The
+requirement for fonts to remain under this license does not apply
+to any document created using the fonts or their derivatives.
+
+DEFINITIONS
+"Font Software" refers to the set of files released by the Copyright
+Holder(s) under this license and clearly marked as such. This may
+include source files, build scripts and documentation.
+
+"Reserved Font Name" refers to any names specified as such after the
+copyright statement(s).
+
+"Original Version" refers to the collection of Font Software components as
+distributed by the Copyright Holder(s).
+
+"Modified Version" refers to any derivative made by adding to, deleting,
+or substituting -- in part or in whole -- any of the components of the
+Original Version, by changing formats or by porting the Font Software to a
+new environment.
+
+"Author" refers to any designer, engineer, programmer, technical
+writer or other person who contributed to the Font Software.
+
+PERMISSION & CONDITIONS
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of the Font Software, to use, study, copy, merge, embed, modify,
+redistribute, and sell modified and unmodified copies of the Font
+Software, subject to the following conditions:
+
+1) Neither the Font Software nor any of its individual components,
+in Original or Modified Versions, may be sold by itself.
+
+2) Original or Modified Versions of the Font Software may be bundled,
+redistributed and/or sold with any software, provided that each copy
+contains the above copyright notice and this license. These can be
+included either as stand-alone text files, human-readable headers or
+in the appropriate machine-readable metadata fields within text or
+binary files as long as those fields can be easily viewed by the user.
+
+3) No Modified Version of the Font Software may use the Reserved Font
+Name(s) unless explicit written permission is granted by the corresponding
+Copyright Holder. This restriction only applies to the primary font name as
+presented to the users.
+
+4) The name(s) of the Copyright Holder(s) or the Author(s) of the Font
+Software shall not be used to promote, endorse or advertise any
+Modified Version, except to acknowledge the contribution(s) of the
+Copyright Holder(s) and the Author(s) or with their explicit written
+permission.
+
+5) The Font Software, modified or unmodified, in part or in whole,
+must be distributed entirely under this license, and must not be
+distributed under any other license. The requirement for fonts to
+remain under this license does not apply to any document created
+using the Font Software.
+
+TERMINATION
+This license becomes null and void if any of the above conditions are
+not met.
+
+DISCLAIMER
+THE FONT SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT
+OF COPYRIGHT, PATENT, TRADEMARK, OR OTHER RIGHT. IN NO EVENT SHALL THE
+COPYRIGHT HOLDER BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+INCLUDING ANY GENERAL, SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL
+DAMAGES, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+FROM, OUT OF THE USE OR INABILITY TO USE THE FONT SOFTWARE OR FROM
+OTHER DEALINGS IN THE FONT SOFTWARE.

app/proguard-rules.pro

@@ -1,3 +1,59 @@
-# Runic Gateway Android app — ProGuard/R8 rules.
-# Minification is disabled until M6 (release hardening); real keep rules for
-# kotlinx.serialization DTOs and Retrofit models are added there.
+# Runic Gateway Android app — ProGuard/R8 rules (release minify + resource shrink, M6).
+#
+# The dependency stack ships its own consumer rules that R8 applies automatically:
+# Retrofit 2.11, OkHttp 4.12, kotlinx.serialization 1.7 (core), Hilt/Dagger, Coil 2.7.
+# The rules below are defensive belt-and-suspenders for the areas full-mode R8 is
+# most likely to over-strip in this app: the kotlinx.serialization generated
+# serializers and our own @Serializable wire DTOs.
+
+# ── kotlinx.serialization (canonical keep rules) ────────────────────────────
+-keepattributes *Annotation*, InnerClasses
+-dontnote kotlinx.serialization.**
+
+# Keep the Companion of @Serializable classes so `.serializer()` resolves.
+-if @kotlinx.serialization.Serializable class **
+-keepclassmembers class <1> {
+    static <1>$Companion Companion;
+}
+-if @kotlinx.serialization.Serializable class ** {
+    static **$Companion Companion;
+}
+-keepclassmembers class <2>$Companion {
+    kotlinx.serialization.KSerializer serializer(...);
+}
+# Keep `INSTANCE.serializer()` of @Serializable objects.
+-if @kotlinx.serialization.Serializable class ** {
+    public static ** INSTANCE;
+}
+-keepclassmembers class <1> {
+    public static <1> INSTANCE;
+    kotlinx.serialization.KSerializer serializer(...);
+}
+# Keep the synthesized $$serializer classes and their descriptor field.
+-keepclassmembers class **$$serializer {
+    *** descriptor;
+}
+
+# ── Our wire DTOs ───────────────────────────────────────────────────────────
+# All request/response models decoded by kotlinx.serialization. Keeping them
+# (and their generated serializers) guarantees additive backend fields and
+# @SerialName mappings survive minification. DTOs are small, so keeping them
+# whole is cheap insurance against a full-mode strip.
+-keep @kotlinx.serialization.Serializable class com.runicgateway.app.** { *; }
+-keepclassmembers class com.runicgateway.app.data.api.dto.** { *; }
+
+# ── Retrofit service interfaces ─────────────────────────────────────────────
+# Retrofit reads method + parameter annotations reflectively; keep our API
+# interfaces' generic signatures so return types (suspend .../Call<T>) resolve.
+-keep,allowobfuscation interface com.runicgateway.app.data.api.*Api
+-keepattributes Signature, Exceptions
+
+# Kotlin metadata is needed for reflection over Kotlin types (serialization/Retrofit).
+-keep class kotlin.Metadata { *; }
+
+# ── Tink / EncryptedSharedPreferences (androidx.security-crypto) ─────────────
+# Tink references Error Prone compile-only annotations that are absent at runtime;
+# they are safe to ignore (they carry no runtime behaviour). Suppresses the R8
+# "Missing class com.google.errorprone.annotations.*" errors.
+-dontwarn com.google.errorprone.annotations.**
+

app/src/debug/res/xml/network_security_config.xml

@@ -0,0 +1,20 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- SPDX-License-Identifier: GPL-3.0-or-later -->
+<!--
+  Debug-only override of the main network_security_config.xml. Keeps the secure
+  base posture (no cleartext) but re-permits cleartext to loopback so debug builds
+  can reach a local website backend at http://127.0.0.1:3000 / http://localhost:3000
+  (ServerUrl allows plain HTTP only when allowInsecureHttp = BuildConfig.DEBUG).
+  Because the platform default already blocks cleartext at targetSdk 28+, this
+  domain-config is what actually makes the debug local-dev path work at runtime.
+
+  This file is compiled only into debug builds; release builds use the main
+  source set's config and permit no cleartext at all.
+-->
+<network-security-config>
+    <base-config cleartextTrafficPermitted="false" />
+    <domain-config cleartextTrafficPermitted="true">
+        <domain includeSubdomains="false">127.0.0.1</domain>
+        <domain includeSubdomains="false">localhost</domain>
+    </domain-config>
+</network-security-config>

app/src/main/AndroidManifest.xml

@@ -6,6 +6,13 @@
     <uses-permission android:name="android.permission.INTERNET" />
     <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
 
+    <!-- Opt-in push notifications (M7): the runtime notification permission (API 33+)
+         and a foreground service that holds the persistent ntfy connection open — the
+         embedded UnifiedPush distributor, so no separate app is needed (PLAN.md §11). -->
+    <uses-permission android:name="android.permission.POST_NOTIFICATIONS" />
+    <uses-permission android:name="android.permission.FOREGROUND_SERVICE" />
+    <uses-permission android:name="android.permission.FOREGROUND_SERVICE_DATA_SYNC" />
+
     <application
         android:name=".RunicGatewayApp"
         android:allowBackup="true"
@@ -13,19 +20,61 @@
         android:fullBackupContent="@xml/backup_rules"
         android:icon="@mipmap/ic_launcher"
         android:label="@string/app_name"
+        android:networkSecurityConfig="@xml/network_security_config"
         android:roundIcon="@mipmap/ic_launcher_round"
         android:supportsRtl="true"
         android:theme="@style/Theme.RunicGateway">
 
+        <!-- singleTop so the SSO Custom Tab returning via the deep link reuses the
+             running task (onNewIntent) instead of stacking a second activity. -->
         <activity
             android:name=".MainActivity"
             android:exported="true"
+            android:launchMode="singleTop"
             android:theme="@style/Theme.RunicGateway">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
                 <category android:name="android.intent.category.LAUNCHER" />
             </intent-filter>
+
+            <!-- Native SSO callback (M9, PLAN.md §4.2). The bridge deep-links the
+                 one-time authorization code back to this fixed, app-owned custom
+                 scheme; it must match SsoAuthManager.REDIRECT_URI and the backend's
+                 MOBILE_AUTH_REDIRECT_URIS allowlist exactly. This is the permanent
+                 fallback on every build (docs/android/APP_LINKS.md). -->
+            <intent-filter>
+                <action android:name="android.intent.action.VIEW" />
+                <category android:name="android.intent.category.DEFAULT" />
+                <category android:name="android.intent.category.BROWSABLE" />
+                <data
+                    android:scheme="runicgateway"
+                    android:host="auth"
+                    android:path="/callback" />
+            </intent-filter>
+
+            <!-- App Links hardening (docs/android/APP_LINKS.md): a verified https
+                 callback that only the domain's real owner can claim. autoVerify
+                 needs a literal host, so ${appLinkHost} is baked at build time
+                 (build.gradle.kts). The generic build leaves it as the reserved
+                 runic-gateway.invalid sentinel — the filter then matches no real
+                 link and never verifies. A white-label build sets -PappLinkHost. -->
+            <intent-filter android:autoVerify="true">
+                <action android:name="android.intent.action.VIEW" />
+                <category android:name="android.intent.category.DEFAULT" />
+                <category android:name="android.intent.category.BROWSABLE" />
+                <data
+                    android:scheme="https"
+                    android:host="${appLinkHost}"
+                    android:path="/mobile/callback" />
+            </intent-filter>
         </activity>
+
+        <!-- The embedded distributor's persistent ntfy connection (M7, PLAN.md §11).
+             dataSync foreground type; not exported — started only by PushManager. -->
+        <service
+            android:name=".core.push.PushService"
+            android:exported="false"
+            android:foregroundServiceType="dataSync" />
     </application>
 
 </manifest>

app/src/main/java/com/runicgateway/app/MainActivity.kt

@@ -3,16 +3,25 @@
  */
 package com.runicgateway.app
 
+import android.content.Intent
+import android.graphics.Color
+import android.net.Uri
 import android.os.Bundle
 import androidx.activity.ComponentActivity
+import androidx.activity.SystemBarStyle
 import androidx.activity.compose.setContent
 import androidx.activity.enableEdgeToEdge
+import androidx.lifecycle.lifecycleScope
 import androidx.compose.foundation.layout.fillMaxSize
 import androidx.compose.material3.MaterialTheme
 import androidx.compose.material3.Surface
 import androidx.compose.runtime.CompositionLocalProvider
 import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.setValue
 import androidx.compose.ui.Modifier
+import com.runicgateway.app.core.auth.sso.SsoAuthManager
+import com.runicgateway.app.core.push.PushNotifier
 import androidx.hilt.navigation.compose.hiltViewModel
 import androidx.lifecycle.compose.collectAsStateWithLifecycle
 import com.runicgateway.app.ui.AppViewModel
@@ -24,6 +33,8 @@ import com.runicgateway.app.ui.connect.ConnectScreen
 import com.runicgateway.app.ui.theme.RunicGatewayTheme
 import com.runicgateway.app.ui.theme.parseBrandColor
 import dagger.hilt.android.AndroidEntryPoint
+import kotlinx.coroutines.launch
+import javax.inject.Inject
 
 /**
  * Single-activity host (PLAN.md §2). Gates on [AppViewModel]: the first-run
@@ -33,9 +44,27 @@ import dagger.hilt.android.AndroidEntryPoint
  */
 @AndroidEntryPoint
 class MainActivity : ComponentActivity() {
+
+    // Native SSO bridge — handles the runicgateway://auth/callback deep link (M9,
+    // §4.2). Field-injected because the callback can arrive independent of any
+    // ViewModel; a successful exchange flips the SessionManager the whole app
+    // observes, and the login screen consumes SsoAuthManager.outcome.
+    @Inject
+    lateinit var ssoAuthManager: SsoAuthManager
+
+    // The stream a tapped push notification wants to open (§11, M7 Part 2 item 7).
+    // Set from the launching intent and from onNewIntent (the activity is singleTop),
+    // consumed once by RunicApp which navigates to the stream's screen.
+    private var pendingStream by mutableStateOf<String?>(null)
+
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
-        enableEdgeToEdge()
+        pendingStream = intent?.getStringExtra(PushNotifier.EXTRA_STREAM)
+        handleSsoCallback(intent)
+        // Dark-only app (M5): force light system-bar icons over the transparent bars so
+        // they stay legible on the deep blue-black surfaces regardless of system theme.
+        val barStyle = SystemBarStyle.dark(Color.TRANSPARENT)
+        enableEdgeToEdge(statusBarStyle = barStyle, navigationBarStyle = barStyle)
         setContent {
             val appViewModel: AppViewModel = hiltViewModel()
             val state by appViewModel.state.collectAsStateWithLifecycle()
@@ -53,11 +82,47 @@ class MainActivity : ComponentActivity() {
                             AppState.NeedsConnection ->
                                 ConnectScreen(onConnected = appViewModel::onConnected)
                             is AppState.Ready ->
-                                RunicApp(brand = s.brand, onChangeServer = appViewModel::changeServer)
+                                RunicApp(
+                                    brand = s.brand,
+                                    onChangeServer = appViewModel::changeServer,
+                                    deepLinkStream = pendingStream,
+                                    onDeepLinkConsumed = { pendingStream = null },
+                                )
                         }
                     }
                 }
             }
         }
     }
+
+    /**
+     * A notification tap or an SSO callback arriving while the activity is already
+     * running (singleTop) — the common case, since the Custom Tab overlays the live
+     * app during sign-in.
+     */
+    override fun onNewIntent(intent: Intent) {
+        super.onNewIntent(intent)
+        setIntent(intent)
+        intent.getStringExtra(PushNotifier.EXTRA_STREAM)?.let { pendingStream = it }
+        handleSsoCallback(intent)
+    }
+
+    /**
+     * Route an SSO callback VIEW intent into the bridge (M9, §4.2): either the
+     * custom-scheme `runicgateway://auth/callback` (always) or the verified https
+     * App Link `https://<paired-host>/mobile/callback` (opt-in hardening —
+     * docs/android/APP_LINKS.md). Both feed the *same* exchange; the result surfaces
+     * on `SsoAuthManager.outcome` (success signs the session in; failure shows on the
+     * login screen). Non-callback intents are ignored.
+     */
+    private fun handleSsoCallback(intent: Intent?) {
+        val data: Uri = intent?.takeIf { it.action == Intent.ACTION_VIEW }?.data ?: return
+        val isCallback = ssoAuthManager.matchesCallback(data.scheme, data.host, data.path) ||
+            ssoAuthManager.matchesAppLinkCallback(data.scheme, data.host, data.path)
+        if (!isCallback) return
+        val state = data.getQueryParameter("state")
+        val code = data.getQueryParameter("code")
+        val error = data.getQueryParameter("error")
+        lifecycleScope.launch { ssoAuthManager.complete(state = state, code = code, error = error) }
+    }
 }

app/src/main/java/com/runicgateway/app/core/auth/DeviceNameProvider.kt

@@ -0,0 +1,34 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.core.auth
+
+import android.os.Build
+import javax.inject.Inject
+import javax.inject.Singleton
+
+/**
+ * Supplies a friendly label for this device, sent as `device_name` at login so a
+ * trusted-device / active-session row is recognizable in the account lists
+ * (TRUSTED_DEVICES_MFA.md). Behind an interface so the auth repository stays free of
+ * `android.os.Build` and unit-testable on the JVM.
+ */
+fun interface DeviceNameProvider {
+    /** A human label like "Google Pixel 8", or null if nothing meaningful is available. */
+    fun deviceName(): String?
+}
+
+/** Production impl: manufacturer + model from [Build] (e.g. "Samsung SM-S918B"). */
+@Singleton
+class BuildDeviceNameProvider @Inject constructor() : DeviceNameProvider {
+    override fun deviceName(): String? {
+        val manufacturer = Build.MANUFACTURER?.trim().orEmpty()
+        val model = Build.MODEL?.trim().orEmpty()
+        val label = when {
+            model.isEmpty() -> manufacturer
+            manufacturer.isEmpty() || model.startsWith(manufacturer, ignoreCase = true) -> model
+            else -> "$manufacturer $model"
+        }.replaceFirstChar { if (it.isLowerCase()) it.titlecase() else it.toString() }
+        return label.take(100).ifBlank { null }
+    }
+}

app/src/main/java/com/runicgateway/app/core/auth/EncryptedTokenStore.kt

@@ -0,0 +1,73 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.core.auth
+
+import android.content.Context
+import android.content.SharedPreferences
+import androidx.security.crypto.EncryptedSharedPreferences
+import androidx.security.crypto.MasterKey
+import dagger.hilt.android.qualifiers.ApplicationContext
+import javax.inject.Inject
+import javax.inject.Singleton
+
+/**
+ * [TokenStore] backed by Jetpack Security's [EncryptedSharedPreferences]
+ * (Tink/AES-256-GCM), so the token pair is encrypted at rest (PLAN.md §2, §4.3).
+ * The base URL stays in plain DataStore ([com.runicgateway.app.core.prefs.ServerPreferences]);
+ * only tokens live here.
+ *
+ * The prefs handle is created lazily so a first-launch device (no session yet)
+ * pays the keystore cost only once a user actually signs in.
+ */
+@Singleton
+class EncryptedTokenStore @Inject constructor(
+    @param:ApplicationContext private val context: Context,
+) : TokenStore {
+
+    private val prefs: SharedPreferences by lazy {
+        val masterKey = MasterKey.Builder(context)
+            .setKeyScheme(MasterKey.KeyScheme.AES256_GCM)
+            .build()
+        EncryptedSharedPreferences.create(
+            context,
+            PREFS_NAME,
+            masterKey,
+            EncryptedSharedPreferences.PrefKeyEncryptionScheme.AES256_SIV,
+            EncryptedSharedPreferences.PrefValueEncryptionScheme.AES256_GCM,
+        )
+    }
+
+    override fun load(): StoredSession? {
+        val access = prefs.getString(KEY_ACCESS, null) ?: return null
+        val refresh = prefs.getString(KEY_REFRESH, null) ?: return null
+        val username = prefs.getString(KEY_USERNAME, null) ?: return null
+        val role = prefs.getString(KEY_ROLE, null) ?: return null
+        val id = prefs.getLong(KEY_USER_ID, -1L)
+        if (id < 0) return null
+        return StoredSession(access, refresh, id, username, role)
+    }
+
+    override fun save(session: StoredSession) {
+        prefs.edit()
+            .putString(KEY_ACCESS, session.accessToken)
+            .putString(KEY_REFRESH, session.refreshToken)
+            .putLong(KEY_USER_ID, session.userId)
+            .putString(KEY_USERNAME, session.username)
+            .putString(KEY_ROLE, session.role)
+            .apply()
+    }
+
+    override fun clear() {
+        prefs.edit().clear().apply()
+    }
+
+    private companion object {
+        const val PREFS_NAME = "runic_session"
+        const val KEY_ACCESS = "access_token"
+        const val KEY_REFRESH = "refresh_token"
+        const val KEY_USER_ID = "user_id"
+        const val KEY_USERNAME = "username"
+        const val KEY_ROLE = "role"
+    }
+}

app/src/main/java/com/runicgateway/app/core/auth/EncryptedTrustTokenStore.kt

@@ -0,0 +1,65 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.core.auth
+
+import android.content.Context
+import android.content.SharedPreferences
+import androidx.security.crypto.EncryptedSharedPreferences
+import androidx.security.crypto.MasterKey
+import dagger.hilt.android.qualifiers.ApplicationContext
+import javax.inject.Inject
+import javax.inject.Singleton
+
+/**
+ * [TrustTokenStore] backed by its **own** EncryptedSharedPreferences file
+ * (Tink/AES-256-GCM), distinct from the session store so it is never wiped by
+ * [SessionManager.onSignedOut] — the trust token must outlive a logout to do its
+ * job (TRUSTED_DEVICES_MFA.md). The token is stored alongside the username it was
+ * minted for so [tokenFor] only returns it for a matching login.
+ *
+ * The prefs handle is lazy so a device that never trusts pays the keystore cost
+ * only if a token is actually stored or read.
+ */
+@Singleton
+class EncryptedTrustTokenStore @Inject constructor(
+    @param:ApplicationContext private val context: Context,
+) : TrustTokenStore {
+
+    private val prefs: SharedPreferences by lazy {
+        val masterKey = MasterKey.Builder(context)
+            .setKeyScheme(MasterKey.KeyScheme.AES256_GCM)
+            .build()
+        EncryptedSharedPreferences.create(
+            context,
+            PREFS_NAME,
+            masterKey,
+            EncryptedSharedPreferences.PrefKeyEncryptionScheme.AES256_SIV,
+            EncryptedSharedPreferences.PrefValueEncryptionScheme.AES256_GCM,
+        )
+    }
+
+    override fun tokenFor(username: String): String? {
+        val token = prefs.getString(KEY_TOKEN, null) ?: return null
+        val owner = prefs.getString(KEY_USERNAME, null) ?: return null
+        // Case-insensitive: usernames are matched case-insensitively server-side.
+        return if (owner.equals(username, ignoreCase = true)) token else null
+    }
+
+    override fun save(username: String, token: String) {
+        prefs.edit()
+            .putString(KEY_TOKEN, token)
+            .putString(KEY_USERNAME, username)
+            .apply()
+    }
+
+    override fun clear() {
+        prefs.edit().clear().apply()
+    }
+
+    private companion object {
+        const val PREFS_NAME = "runic_trust"
+        const val KEY_TOKEN = "trust_token"
+        const val KEY_USERNAME = "trust_username"
+    }
+}

app/src/main/java/com/runicgateway/app/core/auth/Session.kt

@@ -0,0 +1,69 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.core.auth
+
+import com.runicgateway.app.data.api.dto.SafeUserDto
+
+/**
+ * The signed-in identity the app carries (PLAN.md §4.3, §5). Role is *advisory*
+ * for menu rendering only — the backend re-checks every gated call, so the app
+ * treats a 403 as authoritative and never assumes access from this value.
+ */
+data class SessionUser(
+    val id: Long,
+    val username: String,
+    val role: Role,
+) {
+    val isPlayer: Boolean get() = role == Role.PLAYER
+
+    /** Any staff role (moderator/editor/admin) — the staff-operations surface (§1, M10). */
+    val isStaff: Boolean get() = role.isStaff
+
+    /** Admin or moderator — moderation actions + the support queue (`modAccess`). */
+    val isModerator: Boolean get() = role == Role.ADMIN || role == Role.MODERATOR
+
+    /** Admin only — site-mode and other `adminOnly` controls. */
+    val isAdmin: Boolean get() = role == Role.ADMIN
+}
+
+/**
+ * The account roles the backend issues. The three staff roles are gated by
+ * capability, not rank (PLAN.md §5); [UNKNOWN] absorbs any future role so an
+ * additive backend change never crashes the menu.
+ */
+enum class Role(val wire: String) {
+    PLAYER("player"),
+    MODERATOR("moderator"),
+    EDITOR("editor"),
+    ADMIN("admin"),
+    UNKNOWN("");
+
+    val isStaff: Boolean get() = this == MODERATOR || this == EDITOR || this == ADMIN
+
+    companion object {
+        fun fromWire(value: String?): Role =
+            entries.firstOrNull { it.wire.equals(value, ignoreCase = true) } ?: UNKNOWN
+    }
+}
+
+/** The two auth states the UI observes. */
+sealed interface Session {
+    data object SignedOut : Session
+    data class SignedIn(val user: SessionUser) : Session
+}
+
+internal fun SafeUserDto.toSessionUser(): SessionUser =
+    SessionUser(id = id, username = username, role = Role.fromWire(role))
+
+internal fun SafeUserDto.toStored(accessToken: String, refreshToken: String): StoredSession =
+    StoredSession(
+        accessToken = accessToken,
+        refreshToken = refreshToken,
+        userId = id,
+        username = username,
+        role = role,
+    )
+
+internal fun StoredSession.toSessionUser(): SessionUser =
+    SessionUser(id = userId, username = username, role = Role.fromWire(role))

app/src/main/java/com/runicgateway/app/core/auth/SessionManager.kt

@@ -0,0 +1,99 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.core.auth
+
+import com.runicgateway.app.data.api.dto.SafeUserDto
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.StateFlow
+import kotlinx.coroutines.flow.asStateFlow
+import java.util.concurrent.atomic.AtomicReference
+import javax.inject.Inject
+import javax.inject.Singleton
+
+/**
+ * The single source of truth for the current session (PLAN.md §4.3). It holds the
+ * in-memory token pair the network layer reads on every call, mirrors the
+ * signed-in identity into an observable [state] the UI + menu react to, and keeps
+ * the encrypted [TokenStore] in sync.
+ *
+ * Threading: [state] and the token holders are read from the UI thread and
+ * written from both coroutines (login/logout) and the OkHttp
+ * [com.runicgateway.app.core.net.TokenAuthenticator] dispatcher thread (silent
+ * refresh), so tokens live in [AtomicReference]s and the mutators are
+ * `@Synchronized` to keep the token pair and [state] consistent with each other.
+ */
+@Singleton
+class SessionManager @Inject constructor(
+    private val store: TokenStore,
+) {
+    private val accessRef = AtomicReference<String?>(null)
+    private val refreshRef = AtomicReference<String?>(null)
+
+    private val _state: MutableStateFlow<Session>
+    val state: StateFlow<Session>
+
+    init {
+        val restored = store.load()
+        if (restored != null) {
+            accessRef.set(restored.accessToken)
+            refreshRef.set(restored.refreshToken)
+            _state = MutableStateFlow(Session.SignedIn(restored.toSessionUser()))
+        } else {
+            _state = MutableStateFlow(Session.SignedOut)
+        }
+        state = _state.asStateFlow()
+    }
+
+    /** The bearer for the current request, or null when signed out. */
+    fun currentAccessToken(): String? = accessRef.get()
+
+    /** The refresh token the authenticator rotates, or null when signed out. */
+    fun currentRefreshToken(): String? = refreshRef.get()
+
+    val isSignedIn: Boolean get() = _state.value is Session.SignedIn
+
+    /** Establish a session from a successful login (§4.1). */
+    @Synchronized
+    fun onSignedIn(accessToken: String, refreshToken: String, user: SafeUserDto) {
+        accessRef.set(accessToken)
+        refreshRef.set(refreshToken)
+        store.save(user.toStored(accessToken, refreshToken))
+        _state.value = Session.SignedIn(user.toSessionUser())
+    }
+
+    /**
+     * Store a rotated token pair after a silent refresh (§4.3). Keeps the current
+     * user; if somehow signed out already, it is a no-op (the refresh raced a
+     * logout and must not resurrect the session).
+     */
+    @Synchronized
+    fun onRefreshed(accessToken: String, refreshToken: String, user: SafeUserDto) {
+        if (_state.value !is Session.SignedIn) return
+        accessRef.set(accessToken)
+        refreshRef.set(refreshToken)
+        store.save(user.toStored(accessToken, refreshToken))
+        // Refresh may carry an updated role — reflect it so the menu stays honest.
+        _state.value = Session.SignedIn(user.toSessionUser())
+    }
+
+    /** Refresh the cached identity from a `/auth/me` re-validation (§4.3). */
+    @Synchronized
+    fun onUserRefreshed(user: SafeUserDto) {
+        val current = _state.value
+        if (current !is Session.SignedIn) return
+        val access = accessRef.get() ?: return
+        val refresh = refreshRef.get() ?: return
+        store.save(user.toStored(access, refresh))
+        _state.value = Session.SignedIn(user.toSessionUser())
+    }
+
+    /** Tear the session down — user logout, dead refresh, or a server switch (§3). */
+    @Synchronized
+    fun onSignedOut() {
+        accessRef.set(null)
+        refreshRef.set(null)
+        store.clear()
+        _state.value = Session.SignedOut
+    }
+}

app/src/main/java/com/runicgateway/app/core/auth/TokenStore.kt

@@ -0,0 +1,31 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.core.auth
+
+/**
+ * The at-rest home for a signed-in session (PLAN.md §4.3): the access + refresh
+ * tokens plus the cached safe-user. Tokens are sensitive, so the production
+ * implementation stores them in EncryptedSharedPreferences — never plain
+ * DataStore or logs. Kept behind an interface so [SessionManager] is unit-testable
+ * against an in-memory fake.
+ */
+interface TokenStore {
+    /** The persisted session restored on launch, or null when signed out. */
+    fun load(): StoredSession?
+
+    /** Persist (overwrite) the current session atomically. */
+    fun save(session: StoredSession)
+
+    /** Wipe every stored token — sign-out and the Settings → Server hard reset (§3). */
+    fun clear()
+}
+
+/** A persisted session: the token pair and the non-sensitive user it belongs to. */
+data class StoredSession(
+    val accessToken: String,
+    val refreshToken: String,
+    val userId: Long,
+    val username: String,
+    val role: String,
+)

app/src/main/java/com/runicgateway/app/core/auth/TrustTokenStore.kt

@@ -0,0 +1,31 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.core.auth
+
+/**
+ * At-rest home for the opaque trusted-device token (TRUSTED_DEVICES_MFA.md). It is
+ * the native analogue of the web `rg_trust` cookie: a device that holds a valid
+ * token skips the TOTP step on its next login (never the password).
+ *
+ * Deliberately **separate** from [TokenStore] and untouched by session teardown —
+ * the token must **survive logout and a dead-refresh sign-out**, because it is only
+ * ever consulted at a *fresh* login (exactly the moment after the session is gone).
+ * Clearing it there would make the feature a no-op. It is scoped to the username it
+ * was minted for so it is never replayed for a different account on a shared device,
+ * and is cleared only by an explicit untrust, a Settings → Server switch, or a
+ * server-side revocation (password change/reset, TOTP disable) that renders it dead.
+ *
+ * Tokens are sensitive, so the production impl uses EncryptedSharedPreferences —
+ * never plain prefs or logs. Kept behind an interface for an in-memory test fake.
+ */
+interface TrustTokenStore {
+    /** The stored trust token for [username], or null if this device isn't trusted for them. */
+    fun tokenFor(username: String): String?
+
+    /** Persist [token] as the trust token for [username] (overwrites any prior one). */
+    fun save(username: String, token: String)
+
+    /** Drop the trust token — untrust-all and the Settings → Server hard reset. */
+    fun clear()
+}

app/src/main/java/com/runicgateway/app/core/auth/sso/EncryptedPendingSsoStore.kt

@@ -0,0 +1,61 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.core.auth.sso
+
+import android.content.Context
+import android.content.SharedPreferences
+import androidx.security.crypto.EncryptedSharedPreferences
+import androidx.security.crypto.MasterKey
+import dagger.hilt.android.qualifiers.ApplicationContext
+import javax.inject.Inject
+import javax.inject.Singleton
+
+/**
+ * [PendingSsoStore] backed by Jetpack Security's [EncryptedSharedPreferences]
+ * (Tink/AES-256-GCM), so the PKCE verifier is encrypted at rest for the brief
+ * window a flow is in progress. Separate prefs file from the session token store —
+ * this holds only the transient SSO handshake, cleared as soon as the callback is
+ * consumed. Lazy, so a device that never signs in via SSO pays no keystore cost.
+ */
+@Singleton
+class EncryptedPendingSsoStore @Inject constructor(
+    @param:ApplicationContext private val context: Context,
+) : PendingSsoStore {
+
+    private val prefs: SharedPreferences by lazy {
+        val masterKey = MasterKey.Builder(context)
+            .setKeyScheme(MasterKey.KeyScheme.AES256_GCM)
+            .build()
+        EncryptedSharedPreferences.create(
+            context,
+            PREFS_NAME,
+            masterKey,
+            EncryptedSharedPreferences.PrefKeyEncryptionScheme.AES256_SIV,
+            EncryptedSharedPreferences.PrefValueEncryptionScheme.AES256_GCM,
+        )
+    }
+
+    override fun save(state: String, verifier: String) {
+        prefs.edit()
+            .putString(KEY_STATE, state)
+            .putString(KEY_VERIFIER, verifier)
+            .apply()
+    }
+
+    override fun load(): PendingSso? {
+        val state = prefs.getString(KEY_STATE, null) ?: return null
+        val verifier = prefs.getString(KEY_VERIFIER, null) ?: return null
+        return PendingSso(state = state, verifier = verifier)
+    }
+
+    override fun clear() {
+        prefs.edit().clear().apply()
+    }
+
+    private companion object {
+        const val PREFS_NAME = "runic_sso_pending"
+        const val KEY_STATE = "state"
+        const val KEY_VERIFIER = "verifier"
+    }
+}

app/src/main/java/com/runicgateway/app/core/auth/sso/PendingSsoStore.kt

@@ -0,0 +1,24 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.core.auth.sso
+
+/**
+ * Persists the in-flight SSO `{state, verifier}` (PKCE Layer B + CSRF state) across
+ * the Custom-Tab round trip so the exchange survives process death — a low-memory
+ * device can evict the app while the Custom Tab is foreground, and the callback then
+ * returns to a fresh process (PLAN.md §4.2). Kept behind an interface so
+ * [SsoAuthManager] stays framework-free and unit-tests on the JVM with a fake.
+ *
+ * Exactly one flow is pending at a time; [save] overwrites any prior. The verifier
+ * is a bearer-equivalent secret for the one-time code, so the production impl
+ * ([EncryptedPendingSsoStore]) encrypts it at rest, mirroring the token store.
+ */
+interface PendingSsoStore {
+    fun save(state: String, verifier: String)
+    fun load(): PendingSso?
+    fun clear()
+}
+
+/** The stashed CSRF state + PKCE verifier for the current SSO attempt. */
+data class PendingSso(val state: String, val verifier: String)

app/src/main/java/com/runicgateway/app/core/auth/sso/Pkce.kt

@@ -0,0 +1,50 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.core.auth.sso
+
+import java.security.MessageDigest
+import java.security.SecureRandom
+import java.util.Base64
+
+/**
+ * PKCE + CSRF-state primitives for the Mobile SSO Authorization Bridge — "Layer B"
+ * of the two PKCE layers (app ↔ website; PLAN.md §4.2, BACKEND_DESIGN "Two PKCE
+ * layers"). The app proves at `/exchange` that it holds the verifier for the
+ * challenge it registered at `/start`, so an intercepted callback code is useless
+ * to anyone but this app.
+ *
+ * Pure JVM (no Android framework types) so it unit-tests on the plain test runner.
+ * The encoding mirrors the backend exactly (RFC 7636 S256): the challenge is
+ * `base64url(SHA-256(verifier))` with no padding, matching Node's
+ * `crypto.createHash('sha256').update(verifier).digest('base64url')`.
+ */
+object Pkce {
+
+    private val random = SecureRandom()
+
+    // RFC 4648 §5 URL-safe base64 without padding — the base64url the backend uses.
+    private val encoder = Base64.getUrlEncoder().withoutPadding()
+
+    /**
+     * A fresh high-entropy `code_verifier`: 32 random bytes → 43 base64url chars,
+     * comfortably inside RFC 7636's 43–128 range and identical in form to the
+     * verifier the website generates for its own IdP layer.
+     */
+    fun newVerifier(): String = randomToken()
+
+    /** A fresh opaque CSRF `state` (same entropy/shape as a verifier). */
+    fun newState(): String = randomToken()
+
+    /** `code_challenge` for [verifier] using the S256 method. */
+    fun challengeOf(verifier: String): String {
+        val digest = MessageDigest.getInstance("SHA-256").digest(verifier.toByteArray(Charsets.US_ASCII))
+        return encoder.encodeToString(digest)
+    }
+
+    private fun randomToken(): String {
+        val bytes = ByteArray(32)
+        random.nextBytes(bytes)
+        return encoder.encodeToString(bytes)
+    }
+}

app/src/main/java/com/runicgateway/app/core/auth/sso/SsoAuthManager.kt

@@ -0,0 +1,246 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.core.auth.sso
+
+import com.runicgateway.app.BuildConfig
+import com.runicgateway.app.core.auth.SessionManager
+import com.runicgateway.app.core.auth.TrustTokenStore
+import com.runicgateway.app.core.net.BaseUrlHolder
+import com.runicgateway.app.data.api.SsoApi
+import com.runicgateway.app.data.api.dto.MobileSsoExchangeRequest
+import kotlinx.coroutines.CancellationException
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.StateFlow
+import kotlinx.coroutines.flow.asStateFlow
+import java.io.IOException
+import javax.inject.Inject
+import javax.inject.Singleton
+
+/**
+ * Orchestrates the native "Sign in with Google/Discord" flow — the app half of the
+ * Mobile SSO Authorization Bridge (PLAN.md §4.2, BACKEND_DESIGN "Mobile SSO
+ * Authorization Bridge"). It never adds a parallel auth path: a successful exchange
+ * drives the *same* [SessionManager.onSignedIn] the password login uses, so the
+ * menu, push registration, and re-validation all react identically.
+ *
+ * The flow:
+ *  1. [buildStartUrl] mints PKCE (Layer B) + a CSRF `state`, stashes them, and
+ *     returns the `/auth/mobile/sso/start` URL the caller opens in a Custom Tab.
+ *  2. The website bounces through the IdP and deep-links back to
+ *     [REDIRECT_URI] with `?code&state` (success) or `?error&state` (failure).
+ *  3. [complete] verifies `state`, exchanges the `code` with the stashed verifier,
+ *     and signs the user in — publishing the result on [outcome]. `MainActivity`
+ *     parses the callback `Uri` (the Android edge) and hands the raw params here,
+ *     so this class stays free of framework types and unit-tests on the JVM.
+ *
+ * The pending `{state, verifier}` is persisted via [PendingSsoStore] (encrypted at
+ * rest), so the exchange survives the process being evicted while the Custom Tab is
+ * foreground — the callback can land in a fresh process and still complete. It is
+ * cleared the moment [complete] consumes it, so a lost/duplicate callback still
+ * **fails closed** as [Failure.STATE_MISMATCH] rather than double-exchanging.
+ *
+ * Threading: [buildStartUrl] runs on the UI thread; [complete] runs on the
+ * activity's coroutine scope after a deep link. [outcome] is a [StateFlow], so a
+ * ViewModel/activity recreation while the Custom Tab is open cannot drop a result.
+ */
+@Singleton
+class SsoAuthManager @Inject constructor(
+    private val ssoApi: SsoApi,
+    private val sessionManager: SessionManager,
+    private val baseUrlHolder: BaseUrlHolder,
+    private val pendingStore: PendingSsoStore,
+    private val trustTokenStore: TrustTokenStore,
+) {
+
+    /** Why an SSO attempt ended, for a friendly inline message on the login screen. */
+    enum class Failure {
+        /** The user cancelled or the IdP/website refused (e.g. no linked account). */
+        DENIED,
+
+        /** The callback `state` didn't match — CSRF guard, or the pending flow was lost. */
+        STATE_MISMATCH,
+
+        /** The one-time code was unknown / expired / already used, or PKCE failed. */
+        EXPIRED_CODE,
+
+        /** Offline / DNS / TLS / timeout during the exchange. */
+        NETWORK,
+
+        /** Any other server failure, or a missing base URL / malformed callback. */
+        SERVER,
+    }
+
+    /** The observable result of the most recent flow; the login screen consumes it. */
+    sealed interface Outcome {
+        data object Idle : Outcome
+        data object Success : Outcome
+        data class Failed(val reason: Failure) : Outcome
+    }
+
+    /**
+     * The host this build baked an App Link intent-filter for (`BuildConfig.APP_LINK_HOST`,
+     * empty on the generic multi-tenant build — see docs/android/APP_LINKS.md).
+     * `internal var` only so unit tests can exercise the App Link path without a build
+     * flavor; production never reassigns it.
+     */
+    internal var appLinkHost: String = BuildConfig.APP_LINK_HOST
+
+    private val _outcome = MutableStateFlow<Outcome>(Outcome.Idle)
+    val outcome: StateFlow<Outcome> = _outcome.asStateFlow()
+
+    /** Ack a delivered [outcome] so it isn't re-handled after a recomposition. */
+    fun consumeOutcome() {
+        _outcome.value = Outcome.Idle
+    }
+
+    /**
+     * Build the `/auth/mobile/sso/start` URL for [providerId] and stash the pending
+     * PKCE verifier + CSRF state (persisted so it survives process death). Returns
+     * null when no shard site is configured yet. Also resets [outcome] to
+     * [Outcome.Idle] so a stale prior result can't fire against the new attempt.
+     */
+    fun buildStartUrl(providerId: String): String? {
+        val base = baseUrlHolder.current ?: return null
+        val verifier = Pkce.newVerifier()
+        val challenge = Pkce.challengeOf(verifier)
+        val state = Pkce.newState()
+        pendingStore.save(state = state, verifier = verifier)
+        _outcome.value = Outcome.Idle
+        return base.newBuilder()
+            .addPathSegments("api/v1/auth/mobile/sso/start")
+            .addQueryParameter("provider", providerId)
+            .addQueryParameter("code_challenge", challenge)
+            .addQueryParameter("state", state)
+            .addQueryParameter("redirect_uri", redirectUriFor(base.host))
+            .build()
+            .toString()
+    }
+
+    /**
+     * The `redirect_uri` to request for a shard on [pairedHost]: the verified https
+     * App Link callback **iff** this build baked an App Link host that matches the
+     * paired host (a white-label/first-party build for exactly this shard — which is
+     * also responsible for enabling `mobile_app_links_enabled` server-side); otherwise
+     * the fixed custom-scheme callback, which every build/shard always supports.
+     */
+    private fun redirectUriFor(pairedHost: String): String =
+        if (appLinkHost.isNotBlank() && appLinkHost.equals(pairedHost, ignoreCase = true)) {
+            "https://$pairedHost$APP_LINK_CALLBACK_PATH"
+        } else {
+            REDIRECT_URI
+        }
+
+    /** True if a deep link's scheme/host/path are our fixed custom-scheme SSO callback. */
+    fun matchesCallback(scheme: String?, host: String?, path: String?): Boolean =
+        scheme == CALLBACK_SCHEME && host == CALLBACK_HOST && path == CALLBACK_PATH
+
+    /**
+     * True if a deep link is a verified https App Link callback for the shard we are
+     * **currently paired to**. The `host == pairedHost` check is defense-in-depth:
+     * `autoVerify` already means only a real, opted-in shard domain can route here,
+     * but the app still refuses an https callback whose host isn't the paired shard.
+     * Returns false before a shard is configured (no paired host to trust).
+     */
+    fun matchesAppLinkCallback(scheme: String?, host: String?, path: String?): Boolean {
+        val pairedHost = baseUrlHolder.current?.host ?: return false
+        return scheme == "https" && path == APP_LINK_CALLBACK_PATH &&
+            host != null && host.equals(pairedHost, ignoreCase = true)
+    }
+
+    /**
+     * Handle the parsed callback params from a returned [REDIRECT_URI] deep link:
+     * verify `state`, map an `error`, else exchange the `code` and sign in.
+     * Publishes the result on [outcome]. Idempotent-safe: the pending is cleared on
+     * entry, so a duplicate delivery of the same callback finds no pending and fails
+     * as [Failure.STATE_MISMATCH] rather than double-exchanging (the backend also
+     * single-uses the code).
+     */
+    suspend fun complete(state: String?, code: String?, error: String?) {
+        val stashed = pendingStore.load()
+        pendingStore.clear()
+
+        // CSRF: the callback must echo the exact state we generated at /start.
+        if (stashed == null || state.isNullOrEmpty() || state != stashed.state) {
+            _outcome.value = Outcome.Failed(Failure.STATE_MISMATCH)
+            return
+        }
+
+        // A website/IdP-side failure comes back as ?error=… (never with a code).
+        if (!error.isNullOrEmpty()) {
+            _outcome.value = Outcome.Failed(mapError(error))
+            return
+        }
+
+        if (code.isNullOrBlank()) {
+            _outcome.value = Outcome.Failed(Failure.SERVER)
+            return
+        }
+
+        val response = try {
+            ssoApi.exchange(MobileSsoExchangeRequest(code = code, codeVerifier = stashed.verifier))
+        } catch (e: CancellationException) {
+            throw e
+        } catch (_: IOException) {
+            _outcome.value = Outcome.Failed(Failure.NETWORK)
+            return
+        } catch (_: Exception) {
+            _outcome.value = Outcome.Failed(Failure.SERVER)
+            return
+        }
+
+        if (response.isSuccessful) {
+            val body = response.body()
+            if (body == null) {
+                _outcome.value = Outcome.Failed(Failure.SERVER)
+                return
+            }
+            // The user ticked "trust this device" on the TOTP form inside the Custom
+            // Tab. That tab's cookie already covers future SSO sign-ins; persisting
+            // the token the exchange handed back is what lets a native PASSWORD login
+            // on this device skip the code too (TRUSTED_DEVICES_MFA.md). Scoped to the
+            // username exactly like the password path, so it is never replayed for a
+            // different account on a shared device. Saved BEFORE onSignedIn so a
+            // process death mid-callback can't lose it.
+            body.trustToken?.let { trustTokenStore.save(body.user.username, it) }
+            sessionManager.onSignedIn(body.accessToken, body.refreshToken, body.user)
+            _outcome.value = Outcome.Success
+            return
+        }
+
+        _outcome.value = Outcome.Failed(if (response.code() == 401) Failure.EXPIRED_CODE else Failure.SERVER)
+    }
+
+    // The bridge's start + callback error codes → user-facing failure reasons.
+    // Start (mobileSso.controller): invalid_provider | provider_unavailable | server_error.
+    // Callback (sso.controller): not_linked | disabled | session_expired | error,
+    // plus a forwarded IdP access_denied.
+    private fun mapError(error: String): Failure = when (error) {
+        // Link-only policy refused, or the account is inactive, or the user declined.
+        "not_linked", "disabled", "access_denied" -> Failure.DENIED
+        // The bridge session aged out mid-flow — start over.
+        "session_expired" -> Failure.EXPIRED_CODE
+        // invalid_provider / provider_unavailable / server_error / error / anything else.
+        else -> Failure.SERVER
+    }
+
+    companion object {
+        const val CALLBACK_SCHEME = "runicgateway"
+        const val CALLBACK_HOST = "auth"
+        const val CALLBACK_PATH = "/callback"
+
+        /**
+         * The one fixed, application-owned callback the bridge redirects to. Must
+         * match the `MOBILE_AUTH_REDIRECT_URIS` allowlist entry on the backend and
+         * the intent-filter in `AndroidManifest.xml` exactly (PLAN.md §4.2).
+         */
+        const val REDIRECT_URI = "$CALLBACK_SCHEME://$CALLBACK_HOST$CALLBACK_PATH"
+
+        /**
+         * Path of the verified https App Link callback (`https://<shard-host>/mobile/callback`).
+         * Must match the app's `autoVerify` intent-filter in `AndroidManifest.xml` and the
+         * backend's self-origin allowlist entry (docs/android/APP_LINKS.md §3.2/§4.2).
+         */
+        const val APP_LINK_CALLBACK_PATH = "/mobile/callback"
+    }
+}

app/src/main/java/com/runicgateway/app/core/net/AuthInterceptor.kt

@@ -0,0 +1,39 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.core.net
+
+import com.runicgateway.app.core.auth.SessionManager
+import okhttp3.Interceptor
+import okhttp3.Response
+import javax.inject.Inject
+import javax.inject.Singleton
+
+/**
+ * Attaches the current bearer access token to outbound calls (PLAN.md §4.1).
+ * Public endpoints simply carry a token the backend ignores; the credential
+ * endpoints (login/refresh) tag themselves [Http.NO_SESSION_HEADER] and are left
+ * bare so a credential `401` is never mistaken for an expired session. A request
+ * that already set its own Authorization (the authenticator's retry) is untouched.
+ */
+@Singleton
+class AuthInterceptor @Inject constructor(
+    private val sessionManager: SessionManager,
+) : Interceptor {
+
+    override fun intercept(chain: Interceptor.Chain): Response {
+        val request = chain.request()
+        if (request.header(Http.NO_SESSION_HEADER) != null) {
+            return chain.proceed(request)
+        }
+        if (request.header(Http.AUTHORIZATION) != null) {
+            return chain.proceed(request)
+        }
+        val token = sessionManager.currentAccessToken()
+            ?: return chain.proceed(request)
+        val authed = request.newBuilder()
+            .header(Http.AUTHORIZATION, Http.bearer(token))
+            .build()
+        return chain.proceed(authed)
+    }
+}

app/src/main/java/com/runicgateway/app/core/net/Http.kt

@@ -0,0 +1,19 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.core.net
+
+/** Shared HTTP constants for the auth layer (PLAN.md §4). */
+object Http {
+    /**
+     * Marks the credential endpoints (login, refresh) that must run *without* a
+     * bearer and must never trigger the refresh-on-401 [TokenAuthenticator].
+     * [AuthInterceptor] sees it and skips attaching a token; the authenticator
+     * sees it on the failed request and declines to refresh. It is a harmless
+     * unknown header to the backend.
+     */
+    const val NO_SESSION_HEADER = "X-Runic-No-Session"
+    const val AUTHORIZATION = "Authorization"
+
+    fun bearer(token: String): String = "Bearer $token"
+}

app/src/main/java/com/runicgateway/app/core/net/ShardStream.kt

@@ -0,0 +1,16 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.core.net
+
+import kotlinx.coroutines.flow.Flow
+
+/**
+ * The live shard SSE feed as a cold flow of lifecycle + frame events (PLAN.md §6.2,
+ * §7). Extracted as an interface so consumers (e.g. [com.runicgateway.app.data.repository.ShardRepository])
+ * depend on the capability, not the OkHttp-backed [ShardStreamClient] — the boards
+ * can then be unit-tested against a fake stream instead of a real network connection.
+ */
+interface ShardStream {
+    fun events(): Flow<ShardStreamEvent>
+}

app/src/main/java/com/runicgateway/app/core/net/ShardStreamClient.kt

@@ -0,0 +1,151 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.core.net
+
+import kotlinx.coroutines.CompletableDeferred
+import kotlinx.coroutines.delay
+import kotlinx.coroutines.flow.Flow
+import kotlinx.coroutines.flow.channelFlow
+import kotlinx.coroutines.isActive
+import kotlinx.serialization.json.Json
+import kotlinx.serialization.json.JsonNull
+import kotlinx.serialization.json.JsonObject
+import kotlinx.serialization.json.jsonObject
+import kotlinx.serialization.json.jsonPrimitive
+import okhttp3.OkHttpClient
+import okhttp3.Request
+import okhttp3.Response
+import okhttp3.sse.EventSource
+import okhttp3.sse.EventSourceListener
+import okhttp3.sse.EventSources
+import java.util.concurrent.TimeUnit
+import java.util.concurrent.atomic.AtomicBoolean
+import javax.inject.Inject
+import javax.inject.Singleton
+
+/**
+ * Consumes the public live-event SSE stream (`GET /public/shard/stream`, safe kinds
+ * only) and re-emits each frame as a [ShardStreamEvent] (PLAN.md §6.2, §7).
+ *
+ * Unlike the browser's `EventSource`, OkHttp's does **not** auto-reconnect, so the
+ * reconnect/backoff loop lives here: on any disconnect the connection is torn down
+ * and re-opened after a growing delay (reset once a connection opens), and while no
+ * shard site is configured yet the flow simply idles. The stream is exposed as a
+ * cold [Flow]; a `viewModelScope` collect opens it and cancellation closes it, so a
+ * dropped feed degrades to "offline" rather than crashing.
+ */
+@Singleton
+class ShardStreamClient @Inject constructor(
+    baseClient: OkHttpClient,
+    private val baseUrlHolder: BaseUrlHolder,
+    private val json: Json,
+) : ShardStream {
+    // SSE is a long-lived, mostly-idle connection (keepalive comments every ~25s),
+    // so the read timeout must be disabled or the idle stream would be killed.
+    private val sseClient: OkHttpClient = baseClient.newBuilder()
+        .readTimeout(0, TimeUnit.MILLISECONDS)
+        .retryOnConnectionFailure(true)
+        .build()
+
+    private val factory = EventSources.createFactory(sseClient)
+
+    /**
+     * A cold flow of stream lifecycle + frame events, reconnecting with backoff
+     * until the collector cancels. [ShardStreamEvent.Open] / [ShardStreamEvent.Closed]
+     * drive a live/offline indicator; [ShardStreamEvent.Frame] carries a decoded
+     * `{ kind, … }` payload the boards merge in place.
+     */
+    override fun events(): Flow<ShardStreamEvent> = channelFlow {
+        var backoffMs = INITIAL_BACKOFF_MS
+        while (isActive) {
+            val url = baseUrlHolder.current?.resolve(STREAM_PATH)
+            if (url == null) {
+                // No shard site configured (or an unresolvable base) — idle, don't spin.
+                trySend(ShardStreamEvent.Closed)
+                delay(backoffMs)
+                backoffMs = grow(backoffMs)
+                continue
+            }
+
+            val request = Request.Builder()
+                .url(url)
+                .header("Accept", "text/event-stream")
+                .build()
+
+            val opened = AtomicBoolean(false)
+            val ended = CompletableDeferred<Unit>()
+            val listener = object : EventSourceListener() {
+                override fun onOpen(eventSource: EventSource, response: Response) {
+                    opened.set(true)
+                    trySend(ShardStreamEvent.Open)
+                }
+
+                override fun onEvent(
+                    eventSource: EventSource,
+                    id: String?,
+                    type: String?,
+                    data: String,
+                ) {
+                    parseFrame(data)?.let { (kind, obj) ->
+                        trySend(ShardStreamEvent.Frame(kind, obj))
+                    }
+                }
+
+                override fun onClosed(eventSource: EventSource) {
+                    trySend(ShardStreamEvent.Closed)
+                    ended.complete(Unit)
+                }
+
+                override fun onFailure(
+                    eventSource: EventSource,
+                    t: Throwable?,
+                    response: Response?,
+                ) {
+                    trySend(ShardStreamEvent.Closed)
+                    ended.complete(Unit)
+                }
+            }
+
+            val source = factory.newEventSource(request, listener)
+            try {
+                // Park until this connection ends; collector cancellation propagates
+                // out of await() and is handled by the finally + the while guard.
+                ended.await()
+            } finally {
+                source.cancel()
+            }
+
+            // A connection that opened before dropping reconnects promptly; a run of
+            // failures that never opened backs off further to avoid hammering a down site.
+            backoffMs = if (opened.get()) INITIAL_BACKOFF_MS else grow(backoffMs)
+            delay(backoffMs)
+        }
+    }
+
+    /**
+     * Parse an SSE `data:` line into `(kind, object)`, dropping keepalive comments
+     * and any frame without a string `kind`. Kept internal + pure for unit testing.
+     */
+    internal fun parseFrame(data: String): Pair<String, JsonObject>? {
+        val trimmed = data.trim()
+        if (trimmed.isEmpty() || trimmed.startsWith(":")) return null
+        return try {
+            val obj = json.parseToJsonElement(trimmed).jsonObject
+            val kindEl = obj["kind"] ?: return null
+            if (kindEl is JsonNull) return null
+            val kind = kindEl.jsonPrimitive.content
+            if (kind.isEmpty()) null else kind to obj
+        } catch (_: Exception) {
+            null
+        }
+    }
+
+    private fun grow(current: Long): Long = (current * 2).coerceAtMost(MAX_BACKOFF_MS)
+
+    private companion object {
+        const val STREAM_PATH = "api/v1/public/shard/stream"
+        const val INITIAL_BACKOFF_MS = 2_000L
+        const val MAX_BACKOFF_MS = 30_000L
+    }
+}

app/src/main/java/com/runicgateway/app/core/net/ShardStreamEvent.kt

@@ -0,0 +1,21 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.core.net
+
+import kotlinx.serialization.json.JsonObject
+
+/**
+ * A lifecycle or data event from the public shard SSE stream (PLAN.md §6.2).
+ *
+ *  - [Open]   — a connection was established (drive the live indicator on).
+ *  - [Closed] — the connection dropped or none is available (indicator off);
+ *               [ShardStreamClient] will reconnect with backoff.
+ *  - [Frame]  — a live event: its `kind` plus the raw JSON object, which the
+ *               boards decode into their DTO (`champ.update` → `ChampDto`, …).
+ */
+sealed interface ShardStreamEvent {
+    data object Open : ShardStreamEvent
+    data object Closed : ShardStreamEvent
+    data class Frame(val kind: String, val data: JsonObject) : ShardStreamEvent
+}

app/src/main/java/com/runicgateway/app/core/net/TokenAuthenticator.kt

@@ -0,0 +1,86 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.core.net
+
+import com.runicgateway.app.core.auth.SessionManager
+import com.runicgateway.app.data.api.AuthRefreshApi
+import com.runicgateway.app.data.api.dto.MobileRefreshRequest
+import okhttp3.Authenticator
+import okhttp3.Request
+import okhttp3.Response
+import okhttp3.Route
+import java.io.IOException
+import javax.inject.Inject
+import javax.inject.Singleton
+
+/**
+ * Transparently refreshes an expired access token on a bearer `401` and replays
+ * the request (PLAN.md §4.1, §4.3). Refresh tokens are single-use and rotated, so
+ * this is serialized behind a mutex: concurrent 401s trigger exactly one refresh
+ * and the losers reuse its result. A refresh that comes back `401` means the
+ * session is truly dead → sign out; a network error leaves the session intact so
+ * a later call can retry.
+ *
+ * The refresh call runs on [AuthRefreshApi] (its own bare client with no
+ * authenticator), so it can never recurse back into here.
+ */
+@Singleton
+class TokenAuthenticator @Inject constructor(
+    private val sessionManager: SessionManager,
+    private val refreshApi: AuthRefreshApi,
+) : Authenticator {
+
+    private val lock = Any()
+
+    override fun authenticate(route: Route?, response: Response): Request? {
+        val failed = response.request
+        // Credential endpoints (login/refresh) must never be "refreshed".
+        if (failed.header(Http.NO_SESSION_HEADER) != null) return null
+        // Give up after a single refresh+replay to avoid an auth loop.
+        if (priorResponseCount(response) >= 2) return null
+
+        val attemptedAuth = failed.header(Http.AUTHORIZATION)
+
+        synchronized(lock) {
+            // Another thread may have already refreshed while we waited on the lock.
+            val current = sessionManager.currentAccessToken()
+            if (current != null && Http.bearer(current) != attemptedAuth) {
+                return failed.retryWith(current)
+            }
+
+            val refreshToken = sessionManager.currentRefreshToken()
+                ?: return null // already signed out
+
+            val refreshed = try {
+                refreshApi.refresh(MobileRefreshRequest(refreshToken)).execute()
+            } catch (_: IOException) {
+                // Transient — surface the original 401 but keep the session.
+                return null
+            }
+
+            val body = refreshed.body()
+            if (!refreshed.isSuccessful || body == null) {
+                // The refresh token is dead (401/expired/revoked) → session is over.
+                sessionManager.onSignedOut()
+                return null
+            }
+
+            sessionManager.onRefreshed(body.accessToken, body.refreshToken, body.user)
+            return failed.retryWith(body.accessToken)
+        }
+    }
+
+    private fun Request.retryWith(accessToken: String): Request =
+        newBuilder().header(Http.AUTHORIZATION, Http.bearer(accessToken)).build()
+
+    private fun priorResponseCount(response: Response): Int {
+        var count = 1
+        var prior = response.priorResponse
+        while (prior != null) {
+            count++
+            prior = prior.priorResponse
+        }
+        return count
+    }
+}

app/src/main/java/com/runicgateway/app/core/push/NtfyStreamClient.kt

@@ -0,0 +1,116 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.core.push
+
+import kotlinx.coroutines.CompletableDeferred
+import kotlinx.coroutines.delay
+import kotlinx.coroutines.flow.Flow
+import kotlinx.coroutines.flow.channelFlow
+import kotlinx.coroutines.isActive
+import kotlinx.serialization.json.Json
+import okhttp3.OkHttpClient
+import okhttp3.Request
+import okhttp3.Response
+import okhttp3.sse.EventSource
+import okhttp3.sse.EventSourceListener
+import okhttp3.sse.EventSources
+import java.util.concurrent.TimeUnit
+import java.util.concurrent.atomic.AtomicBoolean
+import javax.inject.Inject
+import javax.inject.Singleton
+
+/**
+ * The embedded distributor's transport (PLAN.md §11, M7 Part 2 work item 1/3):
+ * a persistent connection to the shard's self-hosted ntfy that subscribes to the
+ * app's own topic and re-emits each content-free tickle. It reuses the same
+ * OkHttp-SSE + reconnect/backoff shape as [com.runicgateway.app.core.net.ShardStreamClient],
+ * but on a **bare** client — no host-retargeting or bearer interceptors — because it
+ * talks straight to ntfy (`<ntfy>/<topic>/sse`), not the website API. Held open by
+ * [PushService]'s foreground service so tickles arrive in the background without
+ * Google Play Services.
+ */
+@Singleton
+class NtfyStreamClient @Inject constructor(
+    private val json: Json,
+) {
+    // A dedicated client with the read timeout disabled for the mostly-idle stream
+    // (ntfy sends keepalive frames); no interceptors so nothing rewrites the host or
+    // attaches a bearer to the relay.
+    private val client: OkHttpClient = OkHttpClient.Builder()
+        .readTimeout(0, TimeUnit.MILLISECONDS)
+        .retryOnConnectionFailure(true)
+        .build()
+
+    private val factory = EventSources.createFactory(client)
+
+    /** Connection lifecycle + decoded tickles for a subscribed topic. */
+    sealed interface Event {
+        data object Open : Event
+        data object Closed : Event
+        data class Message(val tickle: PushTickle) : Event
+    }
+
+    /**
+     * A cold flow subscribing to `<ntfyBaseUrl>/<topic>/sse`, reconnecting with
+     * backoff until the collector cancels. A dropped relay simply reconnects; a bad
+     * config (null URL) idles rather than spinning.
+     */
+    fun events(ntfyBaseUrl: String?, topic: String): Flow<Event> = channelFlow {
+        var backoffMs = INITIAL_BACKOFF_MS
+        while (isActive) {
+            val url = NtfyTopic.sseUrl(ntfyBaseUrl, topic)
+            if (url == null) {
+                trySend(Event.Closed)
+                delay(backoffMs)
+                backoffMs = grow(backoffMs)
+                continue
+            }
+
+            val request = Request.Builder()
+                .url(url)
+                .header("Accept", "text/event-stream")
+                .build()
+
+            val opened = AtomicBoolean(false)
+            val ended = CompletableDeferred<Unit>()
+            val listener = object : EventSourceListener() {
+                override fun onOpen(eventSource: EventSource, response: Response) {
+                    opened.set(true)
+                    trySend(Event.Open)
+                }
+
+                override fun onEvent(eventSource: EventSource, id: String?, type: String?, data: String) {
+                    parseNtfyTickle(json, data)?.let { trySend(Event.Message(it)) }
+                }
+
+                override fun onClosed(eventSource: EventSource) {
+                    trySend(Event.Closed)
+                    ended.complete(Unit)
+                }
+
+                override fun onFailure(eventSource: EventSource, t: Throwable?, response: Response?) {
+                    trySend(Event.Closed)
+                    ended.complete(Unit)
+                }
+            }
+
+            val source = factory.newEventSource(request, listener)
+            try {
+                ended.await()
+            } finally {
+                source.cancel()
+            }
+
+            backoffMs = if (opened.get()) INITIAL_BACKOFF_MS else grow(backoffMs)
+            delay(backoffMs)
+        }
+    }
+
+    private fun grow(current: Long): Long = (current * 2).coerceAtMost(MAX_BACKOFF_MS)
+
+    private companion object {
+        const val INITIAL_BACKOFF_MS = 2_000L
+        const val MAX_BACKOFF_MS = 30_000L
+    }
+}

app/src/main/java/com/runicgateway/app/core/push/NtfyTopic.kt

@@ -0,0 +1,48 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.core.push
+
+import java.security.SecureRandom
+
+/**
+ * The app's own ntfy topic — the heart of the embedded-distributor design
+ * (PLAN.md §11, M7 Part 2 work item 1). The app mints a **random, unguessable**
+ * topic and registers its public URL (`https://<ntfy-host>/<topic>`) as the device
+ * endpoint the backend POSTs tickles to; the app subscribes to the same topic's SSE
+ * stream to receive them. Security rests on the topic being unguessable plus the
+ * content-free tickle — a leaked topic name reveals nothing.
+ */
+object NtfyTopic {
+
+    // ntfy topic names allow [A-Za-z0-9_-]; keep to that set. The "up" prefix mirrors
+    // the UnifiedPush convention and makes topics recognizable in logs/relay.
+    private const val ALPHABET = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"
+    private const val TOPIC_LEN = 24
+    private const val PREFIX = "up"
+
+    private val secureRandom by lazy { SecureRandom() }
+
+    /** Mint a fresh unguessable topic, e.g. "up7Qk3…" (≈143 bits of entropy). */
+    fun generate(random: java.util.Random = secureRandom): String {
+        val sb = StringBuilder(PREFIX.length + TOPIC_LEN)
+        sb.append(PREFIX)
+        repeat(TOPIC_LEN) { sb.append(ALPHABET[random.nextInt(ALPHABET.length)]) }
+        return sb.toString()
+    }
+
+    /**
+     * The endpoint URL the backend publishes to: `<ntfyBaseUrl>/<topic>`. [ntfyBaseUrl]
+     * is the client-facing base from `/public/settings.push.ntfyUrl`; a trailing slash
+     * is tolerated. Returns null for a blank base or topic.
+     */
+    fun endpointUrl(ntfyBaseUrl: String?, topic: String): String? {
+        val base = ntfyBaseUrl?.trim()?.trimEnd('/').orEmpty()
+        if (base.isEmpty() || topic.isBlank()) return null
+        return "$base/$topic"
+    }
+
+    /** The SSE subscribe URL the app connects to: `<ntfyBaseUrl>/<topic>/sse`. */
+    fun sseUrl(ntfyBaseUrl: String?, topic: String): String? =
+        endpointUrl(ntfyBaseUrl, topic)?.let { "$it/sse" }
+}

app/src/main/java/com/runicgateway/app/core/push/PushManager.kt

@@ -0,0 +1,156 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.core.push
+
+import android.content.Context
+import com.runicgateway.app.core.auth.Session
+import com.runicgateway.app.core.auth.SessionManager
+import com.runicgateway.app.core.result.ApiResult
+import com.runicgateway.app.data.repository.NotificationsRepository
+import dagger.hilt.android.qualifiers.ApplicationContext
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.SupervisorJob
+import kotlinx.coroutines.flow.Flow
+import kotlinx.coroutines.flow.map
+import kotlinx.coroutines.launch
+import javax.inject.Inject
+import javax.inject.Singleton
+
+/**
+ * Orchestrates the app's opt-in push lifecycle (PLAN.md §11, M7 Part 2 work item 5):
+ * mint/keep the ntfy topic, register/unregister the device endpoint with the backend,
+ * and start/stop the foreground [PushService] — all keyed to the user's opt-in and
+ * the session. The endpoint the app registers is its own topic URL on the shard's
+ * ntfy (the embedded-distributor design, work item 1).
+ *
+ * Lifecycle rules:
+ *  - register only when **signed in** and the shard advertises a relay (`ntfyUrl`);
+ *  - a **sign-out** stops the service and forgets the ephemeral registration but keeps
+ *    the opt-in intent, so push re-registers on the next sign-in (mirrors the M3 token
+ *    teardown, and covers logout / dead-refresh / server switch uniformly via the
+ *    session-state observer);
+ *  - a **relay/base-URL change** re-registers on the new host with a fresh topic.
+ */
+@Singleton
+class PushManager @Inject constructor(
+    @param:ApplicationContext private val context: Context,
+    private val prefs: PushPreferences,
+    private val notifications: NotificationsRepository,
+    private val sessionManager: SessionManager,
+) {
+    private val scope = CoroutineScope(SupervisorJob() + Dispatchers.IO)
+
+    /** Whether the user has push turned on (drives the Notifications screen). */
+    val enabled: Flow<Boolean> = prefs.enabled
+
+    /** Whether this shard advertises a push relay at all (null ntfyUrl → unsupported). */
+    val supported: Flow<Boolean> = prefs.ntfyUrl.map { !it.isNullOrBlank() }
+
+    init {
+        // Uniform teardown/resume across every auth transition: logout, dead-refresh
+        // sign-out, and server switch all land on SignedOut; a fresh login re-asserts.
+        scope.launch {
+            sessionManager.state.collect { s ->
+                when (s) {
+                    is Session.SignedOut -> localTeardown()
+                    is Session.SignedIn -> maybeResume()
+                }
+            }
+        }
+    }
+
+    /** Record the shard's client-facing ntfy base URL (from `/public/settings`). */
+    suspend fun setNtfyUrl(url: String?) {
+        val previous = prefs.snapshot().ntfyUrl
+        prefs.setNtfyUrl(url)
+        // The relay host arriving (or changing) is what unblocks a pending resume.
+        if (!url.isNullOrBlank() && url != previous) maybeResume()
+    }
+
+    /**
+     * Turn push on (idempotent): ensure a topic on the current relay, register its
+     * endpoint with the backend, persist, and start the foreground service. Called
+     * when the user opts into ≥1 stream.
+     */
+    suspend fun enable(): PushResult = register(setIntent = true)
+
+    /** Turn push off (user opted out of every stream): clear intent + deregister. */
+    suspend fun disable() {
+        prefs.setEnabled(false)
+        deregisterDevice()
+    }
+
+    /**
+     * Deregister this device on an explicit sign-out / server switch, while the bearer
+     * is still valid, so no orphan device row is left behind. Keeps the opt-in intent
+     * (and ntfyUrl) so push re-registers on the next sign-in. Call this *before* the
+     * session is torn down.
+     */
+    suspend fun deregisterDevice() {
+        val snap = prefs.snapshot()
+        snap.deviceId?.let { notifications.deleteDevice(it) } // best-effort
+        stopService()
+        prefs.clearRegistration()
+    }
+
+    /** Re-assert registration if the user is opted in and the shard supports push. */
+    private suspend fun maybeResume() {
+        val snap = prefs.snapshot()
+        if (snap.enabled && sessionManager.isSignedIn && !snap.ntfyUrl.isNullOrBlank()) {
+            register(setIntent = false)
+        }
+    }
+
+    private suspend fun register(setIntent: Boolean): PushResult {
+        if (!sessionManager.isSignedIn) return PushResult.NotSignedIn
+        val snap = prefs.snapshot()
+        val ntfyUrl = snap.ntfyUrl
+        if (ntfyUrl.isNullOrBlank()) return PushResult.Unsupported
+
+        // Reuse an existing topic only if its endpoint still sits on the current relay
+        // origin; otherwise (first run, or a server switch) mint a fresh unguessable one.
+        val base = ntfyUrl.trimEnd('/')
+        val topic = snap.topic?.takeIf { snap.endpoint?.startsWith("$base/") == true }
+            ?: NtfyTopic.generate()
+        val endpoint = NtfyTopic.endpointUrl(ntfyUrl, topic) ?: return PushResult.Unsupported
+
+        return when (val res = notifications.registerDevice(endpoint, PLATFORM)) {
+            is ApiResult.Ok -> {
+                prefs.setRegistration(topic, endpoint, res.data.id)
+                if (setIntent) prefs.setEnabled(true)
+                startService()
+                PushResult.Enabled
+            }
+            // 400 = endpoint origin isn't on the shard's ntfy allow-set (misconfigured relay).
+            is ApiResult.HttpError -> PushResult.Failed(res.status)
+            is ApiResult.NetworkError -> PushResult.Failed(null)
+        }
+    }
+
+    /** Local-only teardown on sign-out — no backend DELETE (the bearer may be dead). */
+    private suspend fun localTeardown() {
+        stopService()
+        prefs.clearRegistration()
+    }
+
+    private fun startService() = runCatching { PushService.start(context) }
+    private fun stopService() = runCatching { PushService.stop(context) }
+
+    /** The outcome of enabling push, surfaced to the Notifications screen. */
+    sealed interface PushResult {
+        data object Enabled : PushResult
+
+        /** This shard advertises no push relay (`/public/settings.push.ntfyUrl` is null). */
+        data object Unsupported : PushResult
+        data object NotSignedIn : PushResult
+
+        /** Registration failed — [status] 400 = relay off the allow-set; null = network. */
+        data class Failed(val status: Int?) : PushResult
+    }
+
+    private companion object {
+        const val PLATFORM = "android"
+    }
+}

app/src/main/java/com/runicgateway/app/core/push/PushNotifier.kt

@@ -0,0 +1,110 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.core.push
+
+import android.app.Notification
+import android.app.NotificationChannel
+import android.app.NotificationManager
+import android.app.PendingIntent
+import android.content.Context
+import android.content.Intent
+import androidx.core.app.NotificationCompat
+import androidx.core.app.NotificationManagerCompat
+import com.runicgateway.app.MainActivity
+import com.runicgateway.app.R
+import dagger.hilt.android.qualifiers.ApplicationContext
+import java.util.concurrent.atomic.AtomicInteger
+import javax.inject.Inject
+import javax.inject.Singleton
+
+/**
+ * Builds the notification channels and posts a notification for a received tickle
+ * (PLAN.md §11, M7 Part 2 work items 2/3/7). v1 shows a **generic per-stream**
+ * notification titled from the fixed [PushStreams] catalog — the content-free tickle
+ * carries nothing to render, so nothing is fetched to display the notification; tapping
+ * deep-links into [MainActivity] (which fetches fresh over the authenticated API).
+ */
+@Singleton
+class PushNotifier @Inject constructor(
+    @param:ApplicationContext private val context: Context,
+) {
+    private val manager = NotificationManagerCompat.from(context)
+    private val nextId = AtomicInteger(1)
+
+    /** Create both channels; safe to call repeatedly (creation is idempotent). */
+    fun ensureChannels() {
+        val system = context.getSystemService(NotificationManager::class.java) ?: return
+        system.createNotificationChannel(
+            NotificationChannel(
+                CHANNEL_MESSAGES,
+                context.getString(R.string.push_channel_messages),
+                NotificationManager.IMPORTANCE_DEFAULT,
+            ).apply { description = context.getString(R.string.push_channel_messages_desc) },
+        )
+        system.createNotificationChannel(
+            NotificationChannel(
+                CHANNEL_SERVICE,
+                context.getString(R.string.push_channel_service),
+                NotificationManager.IMPORTANCE_LOW,
+            ).apply {
+                description = context.getString(R.string.push_channel_service_desc)
+                setShowBadge(false)
+            },
+        )
+    }
+
+    /** The persistent low-importance notification the foreground service runs under. */
+    fun serviceNotification(): Notification =
+        NotificationCompat.Builder(context, CHANNEL_SERVICE)
+            .setContentTitle(context.getString(R.string.push_service_title))
+            .setContentText(context.getString(R.string.push_service_text))
+            .setSmallIcon(R.drawable.ic_stat_name)
+            .setOngoing(true)
+            .setPriority(NotificationCompat.PRIORITY_LOW)
+            .setContentIntent(deepLinkIntent(stream = null, ref = null))
+            .build()
+
+    /** Post a notification for a tickle, deep-linking to the stream's screen on tap. */
+    fun notify(tickle: PushTickle) {
+        if (!manager.areNotificationsEnabled()) return // POST_NOTIFICATIONS not granted
+        val title = context.getString(PushStreams.titleRes(tickle.stream))
+        val notification = NotificationCompat.Builder(context, CHANNEL_MESSAGES)
+            .setContentTitle(title)
+            .setSmallIcon(R.drawable.ic_stat_name)
+            .setAutoCancel(true)
+            .setPriority(NotificationCompat.PRIORITY_DEFAULT)
+            .setContentIntent(deepLinkIntent(tickle.stream, tickle.ref))
+            .build()
+        try {
+            manager.notify(nextId.getAndIncrement(), notification)
+        } catch (_: SecurityException) {
+            // Racing a permission revoke — drop silently rather than crash.
+        }
+    }
+
+    private fun deepLinkIntent(stream: String?, ref: String?): PendingIntent {
+        val intent = Intent(context, MainActivity::class.java).apply {
+            flags = Intent.FLAG_ACTIVITY_SINGLE_TOP or Intent.FLAG_ACTIVITY_CLEAR_TOP
+            if (stream != null) putExtra(EXTRA_STREAM, stream)
+            if (ref != null) putExtra(EXTRA_REF, ref)
+        }
+        // A distinct request code per stream so PendingIntents don't collapse into one.
+        val requestCode = stream?.hashCode() ?: 0
+        return PendingIntent.getActivity(
+            context,
+            requestCode,
+            intent,
+            PendingIntent.FLAG_IMMUTABLE or PendingIntent.FLAG_UPDATE_CURRENT,
+        )
+    }
+
+    companion object {
+        const val CHANNEL_MESSAGES = "push_messages"
+        const val CHANNEL_SERVICE = "push_service"
+
+        /** Intent extras a tapped notification carries into [MainActivity] (§7 deep-links). */
+        const val EXTRA_STREAM = "com.runicgateway.app.push.STREAM"
+        const val EXTRA_REF = "com.runicgateway.app.push.REF"
+    }
+}

app/src/main/java/com/runicgateway/app/core/push/PushPreferences.kt

@@ -0,0 +1,91 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.core.push
+
+import android.content.Context
+import androidx.datastore.core.DataStore
+import androidx.datastore.preferences.core.Preferences
+import androidx.datastore.preferences.core.booleanPreferencesKey
+import androidx.datastore.preferences.core.edit
+import androidx.datastore.preferences.core.longPreferencesKey
+import androidx.datastore.preferences.core.stringPreferencesKey
+import androidx.datastore.preferences.preferencesDataStore
+import dagger.hilt.android.qualifiers.ApplicationContext
+import kotlinx.coroutines.flow.Flow
+import kotlinx.coroutines.flow.first
+import kotlinx.coroutines.flow.map
+import javax.inject.Inject
+import javax.inject.Singleton
+
+private val Context.pushDataStore: DataStore<Preferences> by preferencesDataStore(name = "push")
+
+/**
+ * Persists the app's push state (PLAN.md §11, M7 Part 2 work item 5). None of it is
+ * secret — the ntfy topic/endpoint's protection is being unguessable plus the
+ * content-free tickle — so plain DataStore is fine (tokens stay in the encrypted
+ * store). Holds the shard's ntfy base URL (from `/public/settings`), the minted
+ * topic + its endpoint URL, the backend-assigned device id (to unregister), and the
+ * user's opt-in flag (the source of truth for "push should be running").
+ */
+@Singleton
+class PushPreferences @Inject constructor(
+    @param:ApplicationContext private val context: Context,
+) {
+    private val store = context.pushDataStore
+
+    val enabled: Flow<Boolean> = store.data.map { it[KEY_ENABLED] ?: false }
+    val ntfyUrl: Flow<String?> = store.data.map { it[KEY_NTFY_URL] }
+
+    suspend fun snapshot(): Snapshot {
+        val p = store.data.first()
+        return Snapshot(
+            enabled = p[KEY_ENABLED] ?: false,
+            ntfyUrl = p[KEY_NTFY_URL],
+            topic = p[KEY_TOPIC],
+            endpoint = p[KEY_ENDPOINT],
+            deviceId = p[KEY_DEVICE_ID],
+        )
+    }
+
+    suspend fun setNtfyUrl(url: String?) = store.edit {
+        if (url.isNullOrBlank()) it.remove(KEY_NTFY_URL) else it[KEY_NTFY_URL] = url
+    }
+
+    suspend fun setEnabled(value: Boolean) = store.edit { it[KEY_ENABLED] = value }
+
+    /** Record the minted topic + its endpoint URL and the assigned device id together. */
+    suspend fun setRegistration(topic: String, endpoint: String, deviceId: Long) = store.edit {
+        it[KEY_TOPIC] = topic
+        it[KEY_ENDPOINT] = endpoint
+        it[KEY_DEVICE_ID] = deviceId
+    }
+
+    /**
+     * Forget the ephemeral device registration (topic/endpoint/device id) — used on
+     * sign-out and on an explicit disable. Deliberately leaves [KEY_ENABLED] and
+     * [KEY_NTFY_URL] intact so the user's opt-in intent survives a sign-out and push
+     * re-registers on the next sign-in; an explicit disable also calls [setEnabled]`(false)`.
+     */
+    suspend fun clearRegistration() = store.edit {
+        it.remove(KEY_TOPIC)
+        it.remove(KEY_ENDPOINT)
+        it.remove(KEY_DEVICE_ID)
+    }
+
+    data class Snapshot(
+        val enabled: Boolean,
+        val ntfyUrl: String?,
+        val topic: String?,
+        val endpoint: String?,
+        val deviceId: Long?,
+    )
+
+    private companion object {
+        val KEY_ENABLED = booleanPreferencesKey("enabled")
+        val KEY_NTFY_URL = stringPreferencesKey("ntfy_url")
+        val KEY_TOPIC = stringPreferencesKey("topic")
+        val KEY_ENDPOINT = stringPreferencesKey("endpoint")
+        val KEY_DEVICE_ID = longPreferencesKey("device_id")
+    }
+}

app/src/main/java/com/runicgateway/app/core/push/PushService.kt

@@ -0,0 +1,95 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.core.push
+
+import android.app.Service
+import android.content.Context
+import android.content.Intent
+import android.content.pm.ServiceInfo
+import android.os.Build
+import android.os.IBinder
+import androidx.core.app.ServiceCompat
+import dagger.hilt.android.AndroidEntryPoint
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.Job
+import kotlinx.coroutines.SupervisorJob
+import kotlinx.coroutines.cancel
+import kotlinx.coroutines.flow.collectLatest
+import kotlinx.coroutines.launch
+import javax.inject.Inject
+
+/**
+ * The always-connected foreground service that IS the embedded distributor
+ * (PLAN.md §11, M7 Part 2 work item 1/3). It holds [NtfyStreamClient]'s persistent
+ * connection to the shard's ntfy open in the background — the price of Google-free,
+ * self-contained instant delivery — and posts a notification for each tickle. It runs
+ * under a low-importance ongoing notification and restarts sticky; [PushManager] starts
+ * and stops it as the user opts in/out or signs out.
+ */
+@AndroidEntryPoint
+class PushService : Service() {
+
+    @Inject lateinit var streamClient: NtfyStreamClient
+    @Inject lateinit var notifier: PushNotifier
+    @Inject lateinit var prefs: PushPreferences
+
+    private val scope = CoroutineScope(SupervisorJob() + Dispatchers.IO)
+    private var connectionJob: Job? = null
+
+    override fun onCreate() {
+        super.onCreate()
+        notifier.ensureChannels()
+    }
+
+    override fun onStartCommand(intent: Intent?, flags: Int, startId: Int): Int {
+        startAsForeground()
+        if (connectionJob == null) connectionJob = scope.launch { run() }
+        return START_STICKY
+    }
+
+    private fun startAsForeground() {
+        val type = if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.UPSIDE_DOWN_CAKE) {
+            ServiceInfo.FOREGROUND_SERVICE_TYPE_DATA_SYNC
+        } else {
+            0
+        }
+        ServiceCompat.startForeground(this, NOTIFICATION_ID, notifier.serviceNotification(), type)
+    }
+
+    private suspend fun run() {
+        val snapshot = prefs.snapshot()
+        val topic = snapshot.topic
+        if (topic.isNullOrBlank() || snapshot.ntfyUrl.isNullOrBlank()) {
+            // Nothing to subscribe to (should not happen — PushManager starts us only
+            // once a topic exists) — stop rather than hold a dead connection open.
+            stopSelf()
+            return
+        }
+        streamClient.events(snapshot.ntfyUrl, topic).collectLatest { event ->
+            if (event is NtfyStreamClient.Event.Message) notifier.notify(event.tickle)
+        }
+    }
+
+    override fun onDestroy() {
+        connectionJob?.cancel()
+        scope.cancel()
+        super.onDestroy()
+    }
+
+    override fun onBind(intent: Intent?): IBinder? = null
+
+    companion object {
+        private const val NOTIFICATION_ID = 42
+
+        fun start(context: Context) {
+            val intent = Intent(context, PushService::class.java)
+            context.startForegroundService(intent)
+        }
+
+        fun stop(context: Context) {
+            context.stopService(Intent(context, PushService::class.java))
+        }
+    }
+}

app/src/main/java/com/runicgateway/app/core/push/PushStreams.kt

@@ -0,0 +1,39 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.core.push
+
+import androidx.annotation.StringRes
+import com.runicgateway.app.R
+
+/**
+ * The known push stream ids (mirrors the backend catalog in
+ * `config/notificationStreams.js`) and their localized notification titles.
+ * The subscribable catalog itself is fetched from
+ * `GET /auth/me/notifications/streams`; this fixed set is only what the receiver
+ * needs to title a content-free tickle without a network round-trip (§11).
+ */
+object PushStreams {
+    const val NEWS_POST = "news.post"
+    const val SERVER_STATUS = "server.status"
+    const val IDOC_WARNING = "idoc.warning"
+    const val CHAMP_START = "champ.start"
+    const val GOVERNOR_ELECTION = "governor.election"
+    const val VENDOR_SALE = "vendor.sale"
+    const val HOUSE_IDOC = "house.idoc"
+    const val ACCOUNT_LOGIN = "account.login"
+
+    /** A short, localized notification title for [streamId]; a generic fallback otherwise. */
+    @StringRes
+    fun titleRes(streamId: String): Int = when (streamId) {
+        NEWS_POST -> R.string.push_stream_news_post
+        SERVER_STATUS -> R.string.push_stream_server_status
+        IDOC_WARNING -> R.string.push_stream_idoc_warning
+        CHAMP_START -> R.string.push_stream_champ_start
+        GOVERNOR_ELECTION -> R.string.push_stream_governor_election
+        VENDOR_SALE -> R.string.push_stream_vendor_sale
+        HOUSE_IDOC -> R.string.push_stream_house_idoc
+        ACCOUNT_LOGIN -> R.string.push_stream_account_login
+        else -> R.string.push_stream_generic
+    }
+}

app/src/main/java/com/runicgateway/app/core/push/PushTickle.kt

@@ -0,0 +1,54 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.core.push
+
+import kotlinx.serialization.Serializable
+import kotlinx.serialization.json.Json
+import kotlinx.serialization.json.JsonNull
+import kotlinx.serialization.json.JsonObject
+import kotlinx.serialization.json.jsonPrimitive
+
+/**
+ * The content-free push tickle the backend publishes (PLAN.md §11): `{ stream, ref }`
+ * and nothing sensitive. [ref] is an opaque hint (a serial / city / timestamp) the
+ * app *could* use to pull real content over the authenticated API; v1 just deep-links
+ * to the stream's screen, so it is carried but not otherwise interpreted.
+ */
+@Serializable
+data class PushTickle(
+    val stream: String,
+    val ref: String? = null,
+)
+
+/**
+ * Parse a tickle out of an ntfy SSE `data:` frame. ntfy wraps our published body in
+ * its own envelope — `{ event, topic, message, … }` — where `message` is the exact
+ * string we POSTed (our `{ stream, ref }` JSON). Only `event == "message"` frames
+ * carry a payload; `open` / `keepalive` frames return null, as does any malformed or
+ * unrecognized body (dropped, never thrown — §7). Pure + `internal` for unit testing.
+ */
+internal fun parseNtfyTickle(json: Json, data: String): PushTickle? {
+    val trimmed = data.trim()
+    if (trimmed.isEmpty() || trimmed.startsWith(":")) return null
+    return try {
+        val envelope = json.parseToJsonElement(trimmed) as? JsonObject ?: return null
+        val event = envelope["event"]?.jsonPrimitive?.content
+        // ntfy lifecycle frames ("open", "keepalive", "poll_request") carry no message.
+        if (event != null && event != "message") return null
+        val messageEl = envelope["message"] ?: return null
+        if (messageEl is JsonNull) return null
+        val message = messageEl.jsonPrimitive.content
+        decodeTickle(json, message)
+    } catch (_: Exception) {
+        null
+    }
+}
+
+/** Decode our own `{ stream, ref }` body; a blank/missing stream is not a tickle. */
+internal fun decodeTickle(json: Json, body: String): PushTickle? = try {
+    val tickle = json.decodeFromString(PushTickle.serializer(), body.trim())
+    tickle.takeIf { it.stream.isNotBlank() }
+} catch (_: Exception) {
+    null
+}

app/src/main/java/com/runicgateway/app/core/result/ApiResult.kt

@@ -4,6 +4,7 @@
 package com.runicgateway.app.core.result
 
 import kotlinx.coroutines.CancellationException
+import kotlinx.serialization.SerializationException
 import retrofit2.HttpException
 import java.io.IOException
 
@@ -37,6 +38,16 @@ inline fun <T, R> ApiResult<T>.map(transform: (T) -> R): ApiResult<R> = when (th
  * Run a suspending Retrofit call and normalize every outcome into an [ApiResult].
  * Coroutine cancellation is rethrown so structured concurrency still works — it
  * is control flow, not a network failure.
+ *
+ * A body the app can't decode (a field whose type/shape doesn't match its DTO, e.g.
+ * a live-shaped `guild.update` snapshot carrying an unexpected value) throws a
+ * [SerializationException] out of the Retrofit converter. That is a broken contract
+ * with the backend, not a bug to crash on: the request completed but the response is
+ * unusable — an invalid upstream response — so it is surfaced as a server-side error
+ * (`502` → [ErrorKind.SERVER]) the screen renders as "something went wrong, retry",
+ * exactly the graceful-degradation the layer promises (never throw for an expected
+ * failure). Without this catch the exception escapes the collecting coroutine and
+ * takes down the whole app.
  */
 suspend fun <T> safeApiCall(block: suspend () -> T): ApiResult<T> = try {
     ApiResult.Ok(block())
@@ -46,4 +57,9 @@ suspend fun <T> safeApiCall(block: suspend () -> T): ApiResult<T> = try {
     ApiResult.HttpError(e.code(), e.message())
 } catch (e: IOException) {
     ApiResult.NetworkError(e)
+} catch (e: SerializationException) {
+    ApiResult.HttpError(MALFORMED_RESPONSE_STATUS, e.message)
 }
+
+/** Synthetic status for a 2xx body the app couldn't decode — an invalid upstream response. */
+private const val MALFORMED_RESPONSE_STATUS = 502

app/src/main/java/com/runicgateway/app/core/web/WebHandoff.kt

@@ -0,0 +1,32 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.core.web
+
+import android.content.ActivityNotFoundException
+import android.content.Context
+import android.net.Uri
+import androidx.browser.customtabs.CustomTabsIntent
+
+/**
+ * Opens the website's own pages in a Chrome Custom Tab (PLAN.md §4.2):
+ * registration, invite acceptance, forgot/reset password, and SSO all stay
+ * website-handled, so the app hands off rather than rebuilding those flows. The
+ * user completes them in the browser and returns to sign in natively (§4.1).
+ */
+object WebHandoff {
+
+    /**
+     * Launch [url] in a Custom Tab. Returns false if no browser could handle it
+     * (extremely rare on Android) so the caller can surface a fallback.
+     */
+    fun open(context: Context, url: String): Boolean = try {
+        CustomTabsIntent.Builder()
+            .setShowTitle(true)
+            .build()
+            .launchUrl(context, Uri.parse(url))
+        true
+    } catch (_: ActivityNotFoundException) {
+        false
+    }
+}

app/src/main/java/com/runicgateway/app/core/web/WebsiteUrls.kt

@@ -0,0 +1,33 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.core.web
+
+import com.runicgateway.app.core.net.BaseUrlHolder
+import javax.inject.Inject
+import javax.inject.Singleton
+
+/**
+ * Resolves the website's front-end page paths against the configured base URL,
+ * for the Custom-Tab hand-offs (PLAN.md §4.2). These are the React SPA routes
+ * (mirrored from `website/client` `App.jsx`), not API endpoints. Null before a
+ * shard site is configured.
+ */
+@Singleton
+class WebsiteUrls @Inject constructor(
+    private val baseUrlHolder: BaseUrlHolder,
+) {
+    private fun resolve(path: String): String? =
+        baseUrlHolder.current?.resolve(path)?.toString()
+
+    /** Create an account on the website. */
+    fun register(): String? = resolve(REGISTER)
+
+    /** Forgot / reset password (the flow built on the backend before app work, §8). */
+    fun forgotPassword(): String? = resolve(FORGOT)
+
+    private companion object {
+        const val REGISTER = "account/register"
+        const val FORGOT = "account/forgot"
+    }
+}

app/src/main/java/com/runicgateway/app/data/api/AdminApi.kt

@@ -0,0 +1,97 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.data.api
+
+import com.runicgateway.app.data.api.dto.AdminDashboardDto
+import com.runicgateway.app.data.api.dto.AdminPostDto
+import com.runicgateway.app.data.api.dto.BanRequest
+import com.runicgateway.app.data.api.dto.BroadcastRequest
+import com.runicgateway.app.data.api.dto.KickRequest
+import com.runicgateway.app.data.api.dto.PageRespondRequest
+import com.runicgateway.app.data.api.dto.PostCreateRequest
+import com.runicgateway.app.data.api.dto.PublishRequest
+import com.runicgateway.app.data.api.dto.SiteModeRequest
+import com.runicgateway.app.data.api.dto.SiteModeStateDto
+import com.runicgateway.app.data.api.dto.SupportPageDto
+import com.runicgateway.app.data.api.dto.UnbanRequest
+import com.runicgateway.app.data.api.dto.AdminWikiCategoryDto
+import com.runicgateway.app.data.api.dto.WikiCategoryRequest
+import com.runicgateway.app.data.api.dto.AdminWikiTagDto
+import retrofit2.Response
+import retrofit2.http.Body
+import retrofit2.http.DELETE
+import retrofit2.http.GET
+import retrofit2.http.PATCH
+import retrofit2.http.PUT
+import retrofit2.http.POST
+import retrofit2.http.Path
+
+/**
+ * The M10 staff-operations surface over `/api/v1/admin/…` (PLAN.md §1, §6.4). On
+ * the authed client — every call carries the bearer, and the backend re-checks the
+ * caller's role on every request (`staffOnly` / `modAccess` / `adminOnly`), so a
+ * demoted user is refused server-side even if a stale menu still showed the entry.
+ *
+ * Grows one group at a time (dashboard first); moderation, support, and content
+ * endpoints are added with their screens.
+ */
+interface AdminApi {
+
+    /** `GET /admin/dashboard` — summary counts + site mode (any staff role). */
+    @GET("api/v1/admin/dashboard")
+    suspend fun dashboard(): AdminDashboardDto
+
+    /** `PUT /admin/site-mode` — switch live/maintenance (admin only; 403 otherwise). */
+    @PUT("api/v1/admin/site-mode")
+    suspend fun setSiteMode(@Body body: SiteModeRequest): SiteModeStateDto
+
+    // ── Content: news posts (any staff role) ──────────────────────────────
+    @GET("api/v1/admin/posts")
+    suspend fun posts(): List<AdminPostDto>
+
+    @POST("api/v1/admin/posts")
+    suspend fun createPost(@Body body: PostCreateRequest): AdminPostDto
+
+    @PATCH("api/v1/admin/posts/{id}/publish")
+    suspend fun publishPost(@Path("id") id: Long, @Body body: PublishRequest): AdminPostDto
+
+    @DELETE("api/v1/admin/posts/{id}")
+    suspend fun deletePost(@Path("id") id: Long): Response<Unit>
+
+    // ── Content: wiki taxonomy (any staff role) ───────────────────────────
+    @GET("api/v1/admin/wiki/categories")
+    suspend fun wikiCategories(): List<AdminWikiCategoryDto>
+
+    @POST("api/v1/admin/wiki/categories")
+    suspend fun createWikiCategory(@Body body: WikiCategoryRequest): AdminWikiCategoryDto
+
+    @DELETE("api/v1/admin/wiki/categories/{id}")
+    suspend fun deleteWikiCategory(@Path("id") id: Long): Response<Unit>
+
+    @GET("api/v1/admin/wiki/tags")
+    suspend fun wikiTags(): List<AdminWikiTagDto>
+
+    // ── Moderation: shard write plane (admin/moderator) ───────────────────
+    @POST("api/v1/admin/shard/kick")
+    suspend fun kick(@Body body: KickRequest): Response<Unit>
+
+    @POST("api/v1/admin/shard/ban")
+    suspend fun ban(@Body body: BanRequest): Response<Unit>
+
+    @POST("api/v1/admin/shard/unban")
+    suspend fun unban(@Body body: UnbanRequest): Response<Unit>
+
+    @POST("api/v1/admin/shard/broadcast")
+    suspend fun broadcast(@Body body: BroadcastRequest): Response<Unit>
+
+    // ── Support queue: help pages (admin/moderator) ───────────────────────
+    @GET("api/v1/admin/shard/pages")
+    suspend fun supportPages(): List<SupportPageDto>
+
+    @POST("api/v1/admin/shard/pages/{id}/respond")
+    suspend fun respondPage(@Path("id") id: String, @Body body: PageRespondRequest): Response<Unit>
+
+    @POST("api/v1/admin/shard/pages/{id}/close")
+    suspend fun closePage(@Path("id") id: String): Response<Unit>
+}

app/src/main/java/com/runicgateway/app/data/api/AuthApi.kt

@@ -0,0 +1,47 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.data.api
+
+import com.runicgateway.app.data.api.dto.MeResponse
+import com.runicgateway.app.data.api.dto.MobileLoginRequest
+import com.runicgateway.app.data.api.dto.MobileLogoutRequest
+import com.runicgateway.app.data.api.dto.MobileTokenResponse
+import retrofit2.Response
+import retrofit2.http.Body
+import retrofit2.http.GET
+import retrofit2.http.Header
+import retrofit2.http.Headers
+import retrofit2.http.POST
+
+/**
+ * The native bearer-auth surface (PLAN.md §4.1). Login and logout run on the main
+ * OkHttp client; [com.runicgateway.app.core.net.AuthInterceptor] attaches the
+ * access token to logout + `/auth/me`, and [com.runicgateway.app.core.net.TokenAuthenticator]
+ * transparently refreshes on a `401`.
+ *
+ * Login is tagged [com.runicgateway.app.core.net.Http.NO_SESSION_HEADER] so it
+ * carries no bearer and a credential `401` (bad password / `totpRequired`) is not
+ * misread as an expired session. It returns a raw [Response] so the caller can
+ * inspect the status and parse the `{ totpRequired }` error body.
+ */
+interface AuthApi {
+
+    // Literal header value required by Retrofit @Headers; matches Http.NO_SESSION_HEADER.
+    // [trustToken] rides the `X-Trust-Token` header (TRUSTED_DEVICES_MFA.md): a valid
+    // token bound to this user lets the server skip the TOTP step. Retrofit omits the
+    // header entirely when it is null, so an untrusted device sends nothing.
+    @Headers("X-Runic-No-Session: 1")
+    @POST("api/v1/auth/mobile/login")
+    suspend fun login(
+        @Body body: MobileLoginRequest,
+        @Header("X-Trust-Token") trustToken: String? = null,
+    ): Response<MobileTokenResponse>
+
+    @POST("api/v1/auth/mobile/logout")
+    suspend fun logout(@Body body: MobileLogoutRequest): Response<Unit>
+
+    /** Current user — the app's authoritative role source, re-validated on resume (§4.3). */
+    @GET("api/v1/auth/me")
+    suspend fun me(): MeResponse
+}

app/src/main/java/com/runicgateway/app/data/api/AuthRefreshApi.kt

@@ -0,0 +1,27 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.data.api
+
+import com.runicgateway.app.data.api.dto.MobileRefreshRequest
+import com.runicgateway.app.data.api.dto.MobileTokenResponse
+import retrofit2.Call
+import retrofit2.http.Body
+import retrofit2.http.Headers
+import retrofit2.http.POST
+
+/**
+ * The token-rotation endpoint, isolated onto its own **bare** OkHttp client
+ * (no auth interceptor, no authenticator) so refreshing can never recurse
+ * through the very [com.runicgateway.app.core.net.TokenAuthenticator] that calls
+ * it (PLAN.md §4.3). It is a blocking [Call] because the authenticator runs on an
+ * OkHttp dispatcher thread, outside any coroutine, and executes it synchronously.
+ *
+ * Tagged `NO_SESSION` so it carries no stale bearer.
+ */
+interface AuthRefreshApi {
+
+    @Headers("X-Runic-No-Session: 1")
+    @POST("api/v1/auth/mobile/refresh")
+    fun refresh(@Body body: MobileRefreshRequest): Call<MobileTokenResponse>
+}

app/src/main/java/com/runicgateway/app/data/api/MeApi.kt

@@ -0,0 +1,89 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.data.api
+
+import com.runicgateway.app.data.api.dto.ChangePasswordRequest
+import com.runicgateway.app.data.api.dto.ChangeUsernameRequest
+import com.runicgateway.app.data.api.dto.LinkedIdentityDto
+import com.runicgateway.app.data.api.dto.PlayerAccountDto
+import com.runicgateway.app.data.api.dto.RecoveryCodesDto
+import com.runicgateway.app.data.api.dto.RecoveryGenerateRequest
+import com.runicgateway.app.data.api.dto.RecoveryStatusDto
+import com.runicgateway.app.data.api.dto.RevokedCountDto
+import com.runicgateway.app.data.api.dto.RevokedFlagDto
+import com.runicgateway.app.data.api.dto.TotpCodeRequest
+import com.runicgateway.app.data.api.dto.TotpSetupDto
+import com.runicgateway.app.data.api.dto.TotpStateDto
+import com.runicgateway.app.data.api.dto.TrustDeviceRequest
+import com.runicgateway.app.data.api.dto.TrustDeviceResultDto
+import com.runicgateway.app.data.api.dto.TrustedDeviceDto
+import com.runicgateway.app.data.api.dto.UsernameResponse
+import retrofit2.Response
+import retrofit2.http.Body
+import retrofit2.http.DELETE
+import retrofit2.http.GET
+import retrofit2.http.HTTP
+import retrofit2.http.PATCH
+import retrofit2.http.POST
+import retrofit2.http.Path
+
+/**
+ * The role-agnostic self-service surface (PLAN.md §6.3, §6.4): account, credential
+ * changes, TOTP enrollment, and linked SSO identities under `/auth/me/account*`.
+ * The app calls these regardless of role and never touches `/admin`. Every call
+ * rides the main client, so [com.runicgateway.app.core.net.AuthInterceptor] attaches
+ * the bearer and [com.runicgateway.app.core.net.TokenAuthenticator] refreshes on 401.
+ */
+interface MeApi {
+
+    @GET("api/v1/auth/me/account")
+    suspend fun getAccount(): PlayerAccountDto
+
+    @PATCH("api/v1/auth/me/account/username")
+    suspend fun changeUsername(@Body body: ChangeUsernameRequest): UsernameResponse
+
+    @PATCH("api/v1/auth/me/account/password")
+    suspend fun changePassword(@Body body: ChangePasswordRequest): Unit
+
+    @POST("api/v1/auth/me/account/totp/setup")
+    suspend fun totpSetup(): TotpSetupDto
+
+    @POST("api/v1/auth/me/account/totp/enable")
+    suspend fun totpEnable(@Body body: TotpCodeRequest): TotpStateDto
+
+    @POST("api/v1/auth/me/account/totp/disable")
+    suspend fun totpDisable(@Body body: TotpCodeRequest): TotpStateDto
+
+    @GET("api/v1/auth/me/account/identities")
+    suspend fun identities(): List<LinkedIdentityDto>
+
+    // DELETE with no body — a plain @DELETE would suffice, but @HTTP keeps the
+    // path template explicit alongside the provider argument.
+    @HTTP(method = "DELETE", path = "api/v1/auth/me/account/identities/{provider}")
+    suspend fun unlinkIdentity(@Path("provider") provider: String): Unit
+
+    // ── Trusted devices (TRUSTED_DEVICES_MFA.md) — devices allowed to skip TOTP ──
+
+    @GET("api/v1/auth/me/trusted-devices")
+    suspend fun trustedDevices(): List<TrustedDeviceDto>
+
+    // Raw [Response] so the caller can read the `409 { error, devices }` cap body,
+    // which a thrown HttpException would discard.
+    @POST("api/v1/auth/me/trusted-devices")
+    suspend fun trustThisDevice(@Body body: TrustDeviceRequest): Response<TrustDeviceResultDto>
+
+    @DELETE("api/v1/auth/me/trusted-devices/{id}")
+    suspend fun revokeTrustedDevice(@Path("id") id: Long): RevokedFlagDto
+
+    @DELETE("api/v1/auth/me/trusted-devices")
+    suspend fun revokeAllTrustedDevices(): RevokedCountDto
+
+    // ── Recovery (backup) codes ──────────────────────────────────────────────
+
+    @GET("api/v1/auth/me/account/recovery-codes/status")
+    suspend fun recoveryCodesStatus(): RecoveryStatusDto
+
+    @POST("api/v1/auth/me/account/recovery-codes/generate")
+    suspend fun generateRecoveryCodes(@Body body: RecoveryGenerateRequest): RecoveryCodesDto
+}

app/src/main/java/com/runicgateway/app/data/api/NotificationsApi.kt

@@ -0,0 +1,43 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.data.api
+
+import com.runicgateway.app.data.api.dto.NotificationStreamsDto
+import com.runicgateway.app.data.api.dto.NotificationSubscriptionsDto
+import com.runicgateway.app.data.api.dto.PushDeviceDto
+import com.runicgateway.app.data.api.dto.RegisterDeviceRequest
+import retrofit2.http.Body
+import retrofit2.http.DELETE
+import retrofit2.http.GET
+import retrofit2.http.POST
+import retrofit2.http.PUT
+import retrofit2.http.Path
+
+/**
+ * The opt-in push surface under `/auth/me` (PLAN.md §11, M7 Part 2): device
+ * (endpoint) registration and per-user stream subscriptions. Every call rides the
+ * main client, so [com.runicgateway.app.core.net.AuthInterceptor] attaches the
+ * bearer and [com.runicgateway.app.core.net.TokenAuthenticator] refreshes on 401 —
+ * registration only ever succeeds while signed in.
+ */
+interface NotificationsApi {
+
+    @POST("api/v1/auth/me/devices")
+    suspend fun registerDevice(@Body body: RegisterDeviceRequest): PushDeviceDto
+
+    @GET("api/v1/auth/me/devices")
+    suspend fun listDevices(): List<PushDeviceDto>
+
+    @DELETE("api/v1/auth/me/devices/{id}")
+    suspend fun deleteDevice(@Path("id") id: Long): Unit
+
+    @GET("api/v1/auth/me/notifications/streams")
+    suspend fun streams(): NotificationStreamsDto
+
+    @GET("api/v1/auth/me/notifications/subscriptions")
+    suspend fun subscriptions(): NotificationSubscriptionsDto
+
+    @PUT("api/v1/auth/me/notifications/subscriptions")
+    suspend fun putSubscriptions(@Body body: NotificationSubscriptionsDto): NotificationSubscriptionsDto
+}

app/src/main/java/com/runicgateway/app/data/api/PlayerShardApi.kt

@@ -0,0 +1,59 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.data.api
+
+import com.runicgateway.app.data.api.dto.CharProfileDto
+import com.runicgateway.app.data.api.dto.CreateGameAccountRequest
+import com.runicgateway.app.data.api.dto.PlayerHouseDto
+import com.runicgateway.app.data.api.dto.RosterDto
+import com.runicgateway.app.data.api.dto.ShardLinkDto
+import com.runicgateway.app.data.api.dto.ShardLinkRequest
+import com.runicgateway.app.data.api.dto.ShardLinkResultDto
+import com.runicgateway.app.data.api.dto.VendorSaleDto
+import com.runicgateway.app.data.api.dto.VendorSnapshotDto
+import retrofit2.http.Body
+import retrofit2.http.GET
+import retrofit2.http.POST
+import retrofit2.http.Path
+
+/**
+ * A player's own game data + game-account linking (PLAN.md §6.3), over the
+ * bearer-gated `/player/shard/…` surface. Every read is ownership-checked
+ * server-side; a `503` means the shard/sidecar is down → the UI renders "offline,
+ * retry" (§7). All reads ride the main authed client (bearer + refresh-on-401).
+ */
+interface PlayerShardApi {
+
+    /** Confirm an in-game `[link` one-time code, tagging the game account to the user. */
+    @POST("api/v1/player/shard/link")
+    suspend fun link(@Body body: ShardLinkRequest): ShardLinkResultDto
+
+    /** Provision a game account (hybrid signup) and auto-link it to the caller. */
+    @POST("api/v1/player/shard/account")
+    suspend fun createAccount(@Body body: CreateGameAccountRequest): ShardLinkResultDto
+
+    /** The caller's linked game accounts. */
+    @GET("api/v1/player/shard/accounts")
+    suspend fun accounts(): List<ShardLinkDto>
+
+    /** Character roster for a linked account. */
+    @GET("api/v1/player/shard/roster/{account}")
+    suspend fun roster(@Path("account") account: String): RosterDto
+
+    /** A character sheet — only for a character on the caller's linked account. */
+    @GET("api/v1/player/shard/char/{serial}")
+    suspend fun char(@Path("serial") serial: String): CharProfileDto
+
+    /** Player vendors for a linked account. */
+    @GET("api/v1/player/shard/vendors/{account}")
+    suspend fun vendors(@Path("account") account: String): VendorSnapshotDto
+
+    /** Recent player-vendor sales across the caller's linked accounts. */
+    @GET("api/v1/player/shard/sales")
+    suspend fun sales(): List<VendorSaleDto>
+
+    /** The caller's own houses (home/decay status). */
+    @GET("api/v1/player/shard/houses")
+    suspend fun houses(): List<PlayerHouseDto>
+}

app/src/main/java/com/runicgateway/app/data/api/PublicApi.kt

@@ -3,11 +3,21 @@
  */
 package com.runicgateway.app.data.api
 
+import com.runicgateway.app.data.api.dto.ChampDto
 import com.runicgateway.app.data.api.dto.ContactRequest
 import com.runicgateway.app.data.api.dto.ContactResponse
+import com.runicgateway.app.data.api.dto.EconomySampleDto
+import com.runicgateway.app.data.api.dto.FeedEventDto
+import com.runicgateway.app.data.api.dto.GovernorDto
+import com.runicgateway.app.data.api.dto.GovernorTermDto
+import com.runicgateway.app.data.api.dto.GuildDto
+import com.runicgateway.app.data.api.dto.HouseDto
+import com.runicgateway.app.data.api.dto.OnlineStaffDto
 import com.runicgateway.app.data.api.dto.PageDto
 import com.runicgateway.app.data.api.dto.PostDto
+import com.runicgateway.app.data.api.dto.PresenceDto
 import com.runicgateway.app.data.api.dto.SettingsDto
+import com.runicgateway.app.data.api.dto.ShardStatusDto
 import com.runicgateway.app.data.api.dto.StatusDto
 import com.runicgateway.app.data.api.dto.WikiCategoryDto
 import com.runicgateway.app.data.api.dto.WikiPageDto
@@ -24,8 +34,10 @@ import retrofit2.http.Url
  * The public (unauthenticated) surface consumed in M1: site status/settings,
  * news posts, CMS pages, wiki, and the contact form (PLAN.md §6.1). Paths are
  * relative to the sentinel base host; [com.runicgateway.app.core.net.HostSelectionInterceptor]
- * retargets them onto the configured shard site. Auth (§4) and the shard widgets
- * (§6.2) arrive in later milestones.
+ * retargets them onto the configured shard site. The public shard widgets (§6.2)
+ * are added in M2; auth (§4) and player game data (§6.3) arrive in later milestones.
+ * The live SSE stream (`/public/shard/stream`) is not a Retrofit call — it is
+ * consumed via OkHttp in [com.runicgateway.app.core.net.ShardStreamClient].
  */
 interface PublicApi {
 
@@ -79,4 +91,41 @@ interface PublicApi {
     // ── Contact ──────────────────────────────────────────────────────────
     @POST("api/v1/public/contact")
     suspend fun postContact(@Body body: ContactRequest): ContactResponse
+
+    // ── Public shard widgets (§6.2) ──────────────────────────────────────
+    @GET("api/v1/public/shard/status")
+    suspend fun getShardStatus(): ShardStatusDto
+
+    @GET("api/v1/public/shard/feed")
+    suspend fun getShardFeed(
+        @Query("kind") kind: String? = null,
+        @Query("limit") limit: Int? = null,
+    ): List<FeedEventDto>
+
+    @GET("api/v1/public/shard/economy")
+    suspend fun getShardEconomy(@Query("limit") limit: Int? = null): List<EconomySampleDto>
+
+    @GET("api/v1/public/shard/online")
+    suspend fun getShardOnline(): List<OnlineStaffDto>
+
+    @GET("api/v1/public/shard/presence")
+    suspend fun getShardPresence(): PresenceDto
+
+    @GET("api/v1/public/shard/champs")
+    suspend fun getShardChamps(): List<ChampDto>
+
+    @GET("api/v1/public/shard/guilds")
+    suspend fun getShardGuilds(): List<GuildDto>
+
+    @GET("api/v1/public/shard/governors")
+    suspend fun getShardGovernors(): List<GovernorDto>
+
+    @GET("api/v1/public/shard/governors/{city}/history")
+    suspend fun getShardGovernorHistory(
+        @Path("city") city: String,
+        @Query("limit") limit: Int? = null,
+    ): List<GovernorTermDto>
+
+    @GET("api/v1/public/shard/houses")
+    suspend fun getShardHouses(): List<HouseDto>
 }

app/src/main/java/com/runicgateway/app/data/api/SsoApi.kt

@@ -0,0 +1,40 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.data.api
+
+import com.runicgateway.app.data.api.dto.MobileSsoExchangeRequest
+import com.runicgateway.app.data.api.dto.MobileTokenResponse
+import com.runicgateway.app.data.api.dto.SsoProviderDto
+import retrofit2.Response
+import retrofit2.http.Body
+import retrofit2.http.GET
+import retrofit2.http.Headers
+import retrofit2.http.POST
+
+/**
+ * The native SSO bridge surface (PLAN.md §4.2, M9). Discovery lists the shard's
+ * enabled providers; exchange trades a callback authorization code (+ its PKCE
+ * verifier) for the same bearer pair as `/auth/mobile/login`.
+ *
+ * The redirect leg (`/auth/mobile/sso/start`) is **not** here — it is opened in a
+ * Custom Tab as a URL (the browser follows the 302 through the IdP), not called as
+ * an XHR. See [com.runicgateway.app.core.auth.sso.SsoAuthManager].
+ *
+ * Exchange is tagged [com.runicgateway.app.core.net.Http.NO_SESSION_HEADER]: it
+ * carries no bearer (the user isn't signed in yet) and a `401` (bad/expired code or
+ * PKCE mismatch) must never be misread as an expired session or trip the refresh
+ * [com.runicgateway.app.core.net.TokenAuthenticator]. It returns a raw [Response]
+ * so the caller can distinguish `401` from other failures.
+ */
+interface SsoApi {
+
+    /** Public discovery — the enabled providers to render login buttons for. */
+    @GET("api/v1/auth/providers")
+    suspend fun providers(): List<SsoProviderDto>
+
+    // Literal header value required by Retrofit @Headers; matches Http.NO_SESSION_HEADER.
+    @Headers("X-Runic-No-Session: 1")
+    @POST("api/v1/auth/mobile/sso/exchange")
+    suspend fun exchange(@Body body: MobileSsoExchangeRequest): Response<MobileTokenResponse>
+}

app/src/main/java/com/runicgateway/app/data/api/dto/AccountDto.kt

@@ -0,0 +1,137 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.data.api.dto
+
+import kotlinx.serialization.Serializable
+
+/**
+ * The role-agnostic self-service ("me") wire shapes (PLAN.md §6.3, §6.4). Field
+ * names match the backend's `account.controller` handlers exactly, surfaced for
+ * the app under `/auth/me/account*`. Every DTO ignores unknown keys (NetworkModule's
+ * lenient Json), so additive backend fields are safe (recorded for M1).
+ */
+
+/** `GET /auth/me/account` — the current account (any role). */
+@Serializable
+data class PlayerAccountDto(
+    val id: Long = 0,
+    val username: String = "",
+    val role: String = "",
+    val email: String? = null,
+    val status: String? = null,
+    val totp_enabled: Boolean = false,
+    /** False for an SSO-provisioned account that has not set a password yet. */
+    val has_password: Boolean = false,
+)
+
+/** `PATCH /auth/me/account/username` body. */
+@Serializable
+data class ChangeUsernameRequest(val username: String)
+
+/** The `{ username }` returned by a successful username change. */
+@Serializable
+data class UsernameResponse(val username: String = "")
+
+/**
+ * `PATCH /auth/me/account/password` body. [currentPassword] is omitted only for an
+ * SSO-provisioned account setting its initial password (has_password == false).
+ */
+@Serializable
+data class ChangePasswordRequest(
+    val newPassword: String,
+    val currentPassword: String? = null,
+)
+
+/** Enrollment material from `POST /auth/me/account/totp/setup`. */
+@Serializable
+data class TotpSetupDto(
+    val otpauthUrl: String? = null,
+    /** QR code as a `data:image/png;base64,…` URL. */
+    val qr: String? = null,
+)
+
+/** `POST /auth/me/account/totp/enable|disable` body — a current authenticator code. */
+@Serializable
+data class TotpCodeRequest(val code: String)
+
+/**
+ * Result of enabling/disabling 2FA. Enabling also returns the freshly generated
+ * single-use [recoveryCodes] **once** (null on disable and for older backends) — the
+ * app shows them for the user to save and never persists them.
+ */
+@Serializable
+data class TotpStateDto(
+    val totp_enabled: Boolean = false,
+    val recoveryCodes: List<String>? = null,
+)
+
+// ── Trusted devices & recovery codes (TRUSTED_DEVICES_MFA.md) ───────────────
+
+/**
+ * An active trusted device (`GET /auth/me/trusted-devices`): a browser/app allowed
+ * to skip the TOTP step at login. Never carries the token. Timestamps are ISO-8601
+ * strings shown as-is (advisory display).
+ */
+@Serializable
+data class TrustedDeviceDto(
+    val id: Long = 0,
+    val platform: String? = null,
+    val deviceName: String? = null,
+    val userAgent: String? = null,
+    val createdAt: String? = null,
+    val lastUsedAt: String? = null,
+    val expiresAt: String? = null,
+)
+
+/** `POST /auth/me/trusted-devices` body — an optional friendly label. */
+@Serializable
+data class TrustDeviceRequest(val deviceName: String? = null)
+
+/**
+ * `POST /auth/me/trusted-devices` success (native): the opaque [trustToken] to store
+ * and replay via `X-Trust-Token`. Web receives the token as a cookie and no body token.
+ */
+@Serializable
+data class TrustDeviceResultDto(
+    val trusted: Boolean = false,
+    val trustToken: String? = null,
+)
+
+/**
+ * `409 { error: "trusted_device_limit", devices }` from a trust attempt at the cap —
+ * the app lists [devices] and asks the user to revoke one, then retry.
+ */
+@Serializable
+data class TrustedDeviceLimitDto(
+    val error: String? = null,
+    val devices: List<TrustedDeviceDto> = emptyList(),
+)
+
+/** `DELETE /auth/me/trusted-devices/:id` — idempotent single-revoke result. */
+@Serializable
+data class RevokedFlagDto(val revoked: Boolean = false)
+
+/** `DELETE /auth/me/trusted-devices` — count of devices untrusted ("untrust all"). */
+@Serializable
+data class RevokedCountDto(val revoked: Int = 0)
+
+/** `GET /auth/me/account/recovery-codes/status` — remaining unused count only. */
+@Serializable
+data class RecoveryStatusDto(val remaining: Int = 0)
+
+/** `POST /auth/me/account/recovery-codes/generate` body — password step-up. */
+@Serializable
+data class RecoveryGenerateRequest(val currentPassword: String? = null)
+
+/** A fresh single-use recovery-code batch, returned **once** (generate + totp enable). */
+@Serializable
+data class RecoveryCodesDto(val recoveryCodes: List<String> = emptyList())
+
+/** A linked external identity (`GET /auth/me/account/identities`). */
+@Serializable
+data class LinkedIdentityDto(
+    val provider: String = "",
+    val email: String? = null,
+    val linked_at: String? = null,
+)

app/src/main/java/com/runicgateway/app/data/api/dto/AdminDto.kt

@@ -0,0 +1,179 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.data.api.dto
+
+import kotlinx.serialization.SerialName
+import kotlinx.serialization.Serializable
+import kotlinx.serialization.json.JsonElement
+
+/**
+ * Wire shapes for the M10 staff-operations surface over `/api/v1/admin/…` (PLAN.md
+ * §1, §6.4). These are consumed only by the staff screens (dashboard, moderation,
+ * support, content); every DTO ignores unknown keys (NetworkModule's lenient Json)
+ * so additive backend fields stay safe. Nothing here is auto-provisioned or secret.
+ */
+
+/** `GET /admin/dashboard` — the staff landing summary. */
+@Serializable
+data class AdminDashboardDto(
+    @SerialName("site_mode") val siteMode: String = "live",
+    @SerialName("last_change") val lastChange: SiteModeChangeDto = SiteModeChangeDto(),
+    val counts: AdminCountsDto = AdminCountsDto(),
+    @SerialName("recent_activity") val recentActivity: List<AdminActivityDto> = emptyList(),
+)
+
+@Serializable
+data class SiteModeChangeDto(
+    val at: String? = null,
+    val by: String? = null,
+)
+
+@Serializable
+data class AdminCountsDto(
+    /** Post counts keyed by DB category (`news`, `five_on_friday`, …). */
+    val posts: Map<String, Int> = emptyMap(),
+    val users: Int = 0,
+)
+
+/** One row of the recent admin-activity log. `detail` is provider-shaped JSON. */
+@Serializable
+data class AdminActivityDto(
+    val id: Long = 0,
+    val username: String? = null,
+    val action: String = "",
+    val detail: JsonElement? = null,
+    @SerialName("created_at") val createdAt: String? = null,
+)
+
+/** `PUT /admin/site-mode` request + response. */
+@Serializable
+data class SiteModeRequest(val mode: String)
+
+@Serializable
+data class SiteModeStateDto(
+    @SerialName("site_mode") val siteMode: String = "live",
+    @SerialName("changed_at") val changedAt: String? = null,
+    @SerialName("changed_by") val changedBy: String? = null,
+)
+
+// ── Content: news posts ───────────────────────────────────────────────────
+
+/**
+ * A post row from `GET /admin/posts` (all posts, incl. unpublished — unlike the
+ * public feed). `published` is a 0/1 flag (MariaDB tinyint), exposed as [isPublished].
+ */
+@Serializable
+data class AdminPostDto(
+    val id: Long,
+    val category: String = "",
+    val title: String = "",
+    val slug: String? = null,
+    val excerpt: String? = null,
+    val body: String? = null,
+    @SerialName("image_url") val imageUrl: String? = null,
+    val published: Int = 0,
+    @SerialName("published_at") val publishedAt: String? = null,
+    @SerialName("created_at") val createdAt: String? = null,
+) {
+    val isPublished: Boolean get() = published != 0
+}
+
+/** `POST/PUT /admin/posts` body. `category` is a URL category the backend maps
+ *  (news | five-on-friday | newsletter | screenshots). */
+@Serializable
+data class PostCreateRequest(
+    val category: String,
+    val title: String,
+    val excerpt: String? = null,
+    val body: String? = null,
+    @SerialName("image_url") val imageUrl: String? = null,
+    val published: Boolean = false,
+)
+
+/** `PATCH /admin/posts/:id/publish` body. */
+@Serializable
+data class PublishRequest(val published: Boolean)
+
+// ── Content: wiki taxonomy ────────────────────────────────────────────────
+
+/** A wiki category from `GET /admin/wiki/categories` (with page counts). */
+@Serializable
+data class AdminWikiCategoryDto(
+    val id: Long,
+    val slug: String = "",
+    val title: String = "",
+    val description: String? = null,
+    @SerialName("sort_order") val sortOrder: Int? = null,
+    @SerialName("page_count") val pageCount: Int? = null,
+    @SerialName("published_count") val publishedCount: Int? = null,
+)
+
+/** `POST /admin/wiki/categories` body. */
+@Serializable
+data class WikiCategoryRequest(
+    val slug: String,
+    val title: String,
+    val description: String? = null,
+    @SerialName("sort_order") val sortOrder: Int? = null,
+)
+
+/** A wiki tag from `GET /admin/wiki/tags` (tags derive from pages; read-only here). */
+@Serializable
+data class AdminWikiTagDto(
+    val id: Long,
+    val slug: String = "",
+    val label: String = "",
+    @SerialName("published_count") val publishedCount: Int? = null,
+)
+
+// ── Moderation (admin/moderator; shard write plane) ───────────────────────
+
+/** `POST /admin/shard/kick` — at least one of account/serial. */
+@Serializable
+data class KickRequest(val account: String? = null, val serial: String? = null)
+
+/** `POST /admin/shard/ban` — account/serial + optional duration (0/absent = indefinite). */
+@Serializable
+data class BanRequest(
+    val account: String? = null,
+    val serial: String? = null,
+    @SerialName("durationSec") val durationSec: Long? = null,
+    val reason: String? = null,
+)
+
+/** `POST /admin/shard/unban`. */
+@Serializable
+data class UnbanRequest(val account: String)
+
+/** `POST /admin/shard/broadcast` — a system message to everyone online. */
+@Serializable
+data class BroadcastRequest(val text: String, val hue: Int? = null)
+
+// ── Support queue (admin/moderator; help pages) ───────────────────────────
+
+/**
+ * One open help page from `GET /admin/shard/pages` (INTEGRATION.md §4). `pageId`
+ * is the sender's in-game serial (the `:id` for respond/close). Permissive — the
+ * shard-state fields beyond these (coords, timing) are ignored.
+ */
+@Serializable
+data class SupportPageDto(
+    @SerialName("pageId") val pageId: String = "",
+    val type: String? = null,
+    val message: String? = null,
+    val handled: Boolean? = null,
+    val handler: String? = null,
+    val sender: SupportActorDto? = null,
+)
+
+/** The page's sender (actor object); [account] present when the character is linked. */
+@Serializable
+data class SupportActorDto(
+    val name: String? = null,
+    val account: String? = null,
+)
+
+/** `POST /admin/shard/pages/:id/respond` — reply, optionally closing the page. */
+@Serializable
+data class PageRespondRequest(val message: String, val close: Boolean = false)

app/src/main/java/com/runicgateway/app/data/api/dto/AuthDto.kt

@@ -0,0 +1,86 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.data.api.dto
+
+import kotlinx.serialization.Serializable
+
+/**
+ * The mobile bearer-auth wire shapes (PLAN.md §4.1). Field names match the
+ * backend's `auth/mobile` controller and `/auth/me` exactly; every DTO ignores
+ * unknown keys (NetworkModule's lenient Json), so additive backend fields are
+ * safe (§8, recorded for M1).
+ */
+
+/**
+ * `POST /auth/mobile/login` body (trusted-devices contract, TRUSTED_DEVICES_MFA.md).
+ * [code] is only sent on the 2FA retry; [recoveryCode] is its single-use fallback
+ * (sent instead of [code]). [trustDevice] asks the server to remember this device so
+ * future logins skip the second factor — on success the response carries a
+ * [MobileTokenResponse.trustToken] the app stores and replays via `X-Trust-Token`.
+ * [device_name] labels the resulting trusted-device / session row (snake_case to
+ * match the backend field exactly).
+ */
+@Serializable
+data class MobileLoginRequest(
+    val username: String,
+    val password: String,
+    val code: String? = null,
+    val recoveryCode: String? = null,
+    val trustDevice: Boolean? = null,
+    val device_name: String? = null,
+)
+
+/** `POST /auth/mobile/refresh` body. */
+@Serializable
+data class MobileRefreshRequest(val refreshToken: String)
+
+/** `POST /auth/mobile/logout` body — revoke this session or (with [all]) every session. */
+@Serializable
+data class MobileLogoutRequest(
+    val refreshToken: String? = null,
+    val all: Boolean? = null,
+)
+
+/**
+ * Success payload from login and refresh: the token pair, the access lifetime
+ * (a zeit/ms duration string, e.g. "15m"), and the safe (secret-stripped) user.
+ *
+ * Login additionally carries the trusted-device outcome when `trustDevice` was set:
+ * [trustToken] is the opaque token to persist + replay (present only when the trust
+ * was accepted), or [trustLimitReached] + [devices] when the per-user cap blocked it
+ * (the login itself still succeeded). Refresh never sets these.
+ */
+@Serializable
+data class MobileTokenResponse(
+    val accessToken: String,
+    val refreshToken: String,
+    val expiresIn: String? = null,
+    val user: SafeUserDto,
+    val trustToken: String? = null,
+    val trustLimitReached: Boolean = false,
+    val devices: List<TrustedDeviceDto> = emptyList(),
+)
+
+/** The minimal, non-sensitive user the app needs to render + gate the menu (§5). */
+@Serializable
+data class SafeUserDto(
+    val id: Long,
+    val username: String,
+    val role: String,
+)
+
+/** `GET /auth/me` envelope — the role source, re-validated on resume (§4.3). */
+@Serializable
+data class MeResponse(val user: SafeUserDto)
+
+/**
+ * The `401 { totpRequired: true }` body the single-request 2FA flow returns when
+ * an account has TOTP on and no/invalid code accompanied the login (§4.1). Parsed
+ * from the error body since it is not a 2xx response.
+ */
+@Serializable
+data class TotpRequiredError(
+    val totpRequired: Boolean = false,
+    val message: String? = null,
+)

app/src/main/java/com/runicgateway/app/data/api/dto/NotificationsDto.kt

@@ -0,0 +1,74 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.data.api.dto
+
+import kotlinx.serialization.Serializable
+
+/**
+ * Wire shapes for the opt-in push surface under `/auth/me` (PLAN.md §11, M7
+ * Part 2). Field names match the backend's `notifications.controller` /
+ * `pushDevices.model` exactly; every DTO ignores unknown keys (NetworkModule's
+ * lenient Json), so additive backend fields are safe (recorded for M1).
+ */
+
+/**
+ * `POST /auth/me/devices` body. [endpoint] is the ntfy topic URL the app's
+ * embedded distributor owns (`https://<ntfy-host>/<topic>`); the backend
+ * SSRF-validates it is HTTPS on the shard's allow-set before storing. [transport]
+ * is `unifiedpush` for the direct-ntfy relay (fcm reserved for a future flavor).
+ */
+@Serializable
+data class RegisterDeviceRequest(
+    val endpoint: String,
+    val transport: String = "unifiedpush",
+    val platform: String? = null,
+)
+
+/** `POST/GET /auth/me/devices` — one registered device (endpoint) for this user. */
+@Serializable
+data class PushDeviceDto(
+    val id: Long = 0,
+    val transport: String = "",
+    val endpoint: String = "",
+    val platform: String? = null,
+    val createdAt: String? = null,
+    val lastSeenAt: String? = null,
+)
+
+/**
+ * One subscribable stream from `GET /auth/me/notifications/streams`. A [personal]
+ * stream is delivered only to the owning user and [requiresLinkedAccount] — the app
+ * greys its toggle until a game account is linked (§11).
+ */
+@Serializable
+data class NotificationStreamDto(
+    val id: String = "",
+    val label: String = "",
+    val description: String = "",
+    val personal: Boolean = false,
+    val requiresLinkedAccount: Boolean = false,
+)
+
+/** `GET /auth/me/notifications/streams` — the catalog. */
+@Serializable
+data class NotificationStreamsDto(
+    val streams: List<NotificationStreamDto> = emptyList(),
+)
+
+/**
+ * `GET/PUT /auth/me/notifications/subscriptions` — the user's opted-in stream ids.
+ * PUT replaces the full set; unknown ids are dropped server-side and the stored set
+ * echoed back.
+ *
+ * [streams] intentionally has NO default: this DTO doubles as the PUT body, and the
+ * backend validator requires the `streams` field (`body('streams').isArray()`).
+ * kotlinx omits a property equal to its default (encodeDefaults=false), so a default
+ * of `emptyList()` would drop the field when the user clears their LAST subscription,
+ * sending `{}` → 400 "Validation failed" (the "can't turn off the last one" bug). With
+ * no default the empty list always serializes as `{"streams":[]}`. Do not re-add a default.
+ */
+@Serializable
+data class NotificationSubscriptionsDto(
+    val streams: List<String>,
+)

app/src/main/java/com/runicgateway/app/data/api/dto/PlayerShardDto.kt

@@ -0,0 +1,224 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.data.api.dto
+
+import kotlinx.serialization.Serializable
+import kotlinx.serialization.json.JsonObject
+
+/**
+ * DTOs for a player's OWN game data (PLAN.md §6.3), read over the bearer-gated
+ * `/player/shard/…` surface. The roster / char / vendor reads return the sidecar
+ * payload verbatim (a permissive object), so only the fields the app renders are
+ * modeled — unknown keys are ignored by the JSON parser (matching the website's
+ * `CharacterSheet.jsx` / `GameAccounts.jsx` and `docs/link/INTEGRATION.md` §5).
+ * Presentation is text-only for v1 (no item icons / paperdoll).
+ *
+ * In-game serials are hex strings (e.g. "0x24C"), the same opaque-key form used on
+ * the public boards (`ShardDto.ActorDto`/`ChampDto`/`HouseDto`) — never numbers.
+ */
+
+// ── Game-account linking ─────────────────────────────────────────────────────
+
+/** `GET /player/shard/accounts` — a linked in-game account. */
+@Serializable
+data class ShardLinkDto(
+    val account: String = "",
+    val userId: Long? = null,
+    val charName: String? = null,
+    val linkedAt: String? = null,
+)
+
+/** `POST /player/shard/link` body — the one-time code shown by `[link` in game. */
+@Serializable
+data class ShardLinkRequest(val code: String)
+
+/** `POST /player/shard/link` result — the confirmed link. */
+@Serializable
+data class ShardLinkResultDto(
+    val linked: Boolean = false,
+    val account: String? = null,
+)
+
+/** `POST /player/shard/account` (hybrid signup) body. */
+@Serializable
+data class CreateGameAccountRequest(
+    val account: String,
+    val password: String,
+)
+
+// ── Character roster + sheet ─────────────────────────────────────────────────
+
+/** `GET /player/shard/roster/:account` — the account's characters (incl. offline). */
+@Serializable
+data class RosterDto(
+    val acct: String? = null,
+    val chars: List<RosterCharDto> = emptyList(),
+)
+
+/** One character in a roster; the picker fetches the full sheet on demand. */
+@Serializable
+data class RosterCharDto(
+    val slot: Int? = null,
+    val serial: String = "",
+    val name: String? = null,
+    val body: Int? = null,
+    val online: Boolean = false,
+)
+
+/**
+ * `GET /player/shard/char/:serial` — a character sheet. `guild` / `governorOf` are
+ * best-effort cross-links the backend decorates in (never fail the sheet).
+ */
+@Serializable
+data class CharProfileDto(
+    val serial: String? = null,
+    val name: String? = null,
+    val title: String? = null,
+    val online: Boolean = false,
+    val acct: String? = null,
+    val stats: CharStatsDto? = null,
+    val skills: List<SkillDto> = emptyList(),
+    val equipment: List<EquipmentDto> = emptyList(),
+    val titles: TitlesDto? = null,
+    val guild: GuildRefDto? = null,
+    val governorOf: List<String> = emptyList(),
+)
+
+@Serializable
+data class CharStatsDto(
+    val str: Int? = null,
+    val dex: Int? = null,
+    val int: Int? = null,
+    val hits: Int? = null,
+    val hitsMax: Int? = null,
+    val mana: Int? = null,
+    val manaMax: Int? = null,
+    val stam: Int? = null,
+    val stamMax: Int? = null,
+    val resist: ResistDto? = null,
+)
+
+@Serializable
+data class ResistDto(
+    val phys: Int? = null,
+    val fire: Int? = null,
+    val cold: Int? = null,
+    val pois: Int? = null,
+    val energy: Int? = null,
+)
+
+/**
+ * A skill line. `base` is the trained value, `value` includes item/temp bonuses,
+ * `cap` is the cap — do NOT assume base ≤ cap (GM chars exceed it). Doubles, as the
+ * shard reports tenths.
+ */
+@Serializable
+data class SkillDto(
+    val n: String? = null,
+    val base: Double? = null,
+    val value: Double? = null,
+    val cap: Double? = null,
+)
+
+/**
+ * An equipped item. Names are usually clilocs (numeric), not strings, and the app
+ * ships no cliloc table, so the text-only sheet renders layer + id + hue + mods.
+ * [mods] is a flattened map of non-zero AOS attributes (empty for plain items);
+ * kept as a raw object since values may be numbers or strings.
+ */
+@Serializable
+data class EquipmentDto(
+    val serial: String? = null,
+    val layer: String? = null,
+    val itemId: Int? = null,
+    val hue: Int? = null,
+    val mods: JsonObject? = null,
+)
+
+/**
+ * Display titles (Protocol 2.0). `selected` is the index into `reward` currently
+ * shown (-1 if none); `reward` entries may be a cliloc number-as-string or a
+ * literal — numeric ones are skipped without a cliloc table (as the website does).
+ */
+@Serializable
+data class TitlesDto(
+    val selected: Int? = null,
+    val reward: List<String> = emptyList(),
+    val fameKarma: String? = null,
+    val skill: String? = null,
+)
+
+/** The guild a character leads (cross-linked from board data). */
+@Serializable
+data class GuildRefDto(
+    val name: String? = null,
+    val abbr: String? = null,
+)
+
+// ── Player vendors + sales ───────────────────────────────────────────────────
+
+/** `GET /player/shard/vendors/:account` — every player vendor on the account. */
+@Serializable
+data class VendorSnapshotDto(
+    val acct: String? = null,
+    val vendors: List<VendorDto> = emptyList(),
+)
+
+@Serializable
+data class VendorDto(
+    val serial: String? = null,
+    val shopName: String? = null,
+    val holdGold: Long? = null,
+    val ownerSerial: String? = null,
+    val map: String? = null,
+    val x: Int? = null,
+    val y: Int? = null,
+    val listings: List<VendorListingDto> = emptyList(),
+)
+
+/** A single vendor listing. Item names are clilocs (see [EquipmentDto]); text-only. */
+@Serializable
+data class VendorListingDto(
+    val serial: String? = null,
+    val itemId: Int? = null,
+    val amount: Int? = null,
+    val price: Long? = null,
+    val forSale: Boolean = false,
+)
+
+/** `GET /player/shard/sales` — a player-vendor sale, visible only to the owner. */
+@Serializable
+data class VendorSaleDto(
+    /** Sale time, epoch ms. */
+    val t: Long? = null,
+    val itemType: String? = null,
+    val amount: Int? = null,
+    val price: Long? = null,
+    val commission: Int? = null,
+    val ownerAcct: String? = null,
+)
+
+// ── Player houses ────────────────────────────────────────────────────────────
+
+/**
+ * `GET /player/shard/houses` — the caller's OWN houses, with full decay/IDOC
+ * detail (their own property). Serial is a hex string here.
+ */
+@Serializable
+data class PlayerHouseDto(
+    val serial: String = "",
+    val stage: String? = null,
+    val map: String? = null,
+    val x: Int? = null,
+    val y: Int? = null,
+    val z: Int? = null,
+    val region: String? = null,
+    val name: String? = null,
+    val ownerSerial: String? = null,
+    val ownerAcct: String? = null,
+    val builtOn: String? = null,
+    val lastRefreshed: String? = null,
+    val isIdoc: Boolean = false,
+    val updatedAt: String? = null,
+)

app/src/main/java/com/runicgateway/app/data/api/dto/PublicDto.kt

@@ -55,6 +55,17 @@ data class RegistrationFlagsDto(
     val sso: Boolean = false,
 )
 
+/**
+ * Push-notification relay config (M7). [ntfyUrl] is the client-facing ntfy base
+ * URL the app's embedded distributor registers its device topic against; null (or
+ * absent, on an older backend) means push isn't configured for this shard and the
+ * Notifications screen shows it as unavailable.
+ */
+@Serializable
+data class PushConfigDto(
+    val ntfyUrl: String? = null,
+)
+
 /**
  * `GET /public/settings` — whitelisted settings + branding. Only the keys the
  * app consumes are modeled; other whitelisted keys are ignored.
@@ -67,4 +78,6 @@ data class SettingsDto(
     val registration: RegistrationFlagsDto = RegistrationFlagsDto(),
     val gameAccountSignup: Boolean = false,
     val brand: BrandDto = BrandDto(),
+    /** Push relay config (M7); default (null ntfyUrl) on a backend that predates it. */
+    val push: PushConfigDto = PushConfigDto(),
 )

app/src/main/java/com/runicgateway/app/data/api/dto/ShardDto.kt

@@ -0,0 +1,174 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.data.api.dto
+
+import kotlinx.serialization.Serializable
+import kotlinx.serialization.json.JsonObject
+
+/**
+ * DTOs for the public shard widgets (PLAN.md §6.2). Shapes mirror the website's
+ * `public/shard.controller.js` responses and the live SSE frames emitted by
+ * `utils/shardBroadcast.js`. The champ/guild/governor board reads return the
+ * stored event payload verbatim (a permissive object), so only the fields the app
+ * renders are modeled; unknown keys are ignored by the JSON parser, and the live
+ * `*.update` frames on `/public/shard/stream` decode into these same DTOs.
+ */
+
+/**
+ * A game actor (player/leader/governor) as embedded in board payloads. Per the wire
+ * spec (`docs/link/INTEGRATION.md` §1), in-game [serial]s are opaque hex-string keys
+ * (e.g. `"0x1A2B"`), never numbers, and [webId] is the linked site-user id as a
+ * string (e.g. `"9931"`) — both are decoded as strings, not parsed.
+ */
+@Serializable
+data class ActorDto(
+    val serial: String? = null,
+    val name: String? = null,
+    val acct: String? = null,
+    val webId: String? = null,
+) {
+    /** Best display label for this actor. */
+    val label: String get() = name ?: acct ?: "Someone"
+}
+
+/** A gold-supply sample (`economy.supply`), oldest → newest in the series. */
+@Serializable
+data class EconomySampleDto(
+    val accounts: Int? = null,
+    val gold: Double? = null,
+    val t: Long? = null,
+)
+
+/** `GET /public/shard/status` — connection state + online count + latest economy. */
+@Serializable
+data class ShardStatusDto(
+    val enabled: Boolean = false,
+    /** Sidecar link state: `connected` / `disconnected` / … */
+    val status: String? = null,
+    /** Whether the in-game plugin is currently connected to the sidecar. */
+    val pluginConnected: Boolean = false,
+    /** ISO timestamp of the last ingested event, or null. */
+    val lastEventAt: String? = null,
+    val onlineCount: Int = 0,
+    val economy: EconomySampleDto? = null,
+) {
+    /** True when the shard is live (link enabled and the plugin is connected). */
+    val isOnline: Boolean get() = enabled && pluginConnected
+}
+
+/**
+ * `GET /public/shard/feed` — a stored notable event. The domain fields live under
+ * [payload]; the live SSE frames carry those same fields at the top level (see
+ * `ShardEventText`).
+ */
+@Serializable
+data class FeedEventDto(
+    val id: Long = 0,
+    val kind: String = "",
+    val t: Long? = null,
+    val bootId: String? = null,
+    val payload: JsonObject? = null,
+    val createdAt: String? = null,
+)
+
+/**
+ * `GET /public/shard/online` — a staff member currently in-world. Location is only
+ * present for privileged viewers server-side; anonymous/app callers see name+serial.
+ */
+@Serializable
+data class OnlineStaffDto(
+    val serial: String? = null,
+    val name: String? = null,
+    val map: String? = null,
+    val x: Int? = null,
+    val y: Int? = null,
+    val z: Int? = null,
+)
+
+/**
+ * A house on the public IDOC board (`GET /public/shard/houses`) — location only.
+ * Owner/price/decay detail is staff-only and never reaches the app.
+ */
+@Serializable
+data class HouseDto(
+    val serial: String = "",
+    val name: String? = null,
+    val region: String? = null,
+    val map: String? = null,
+    val x: Int? = null,
+    val y: Int? = null,
+    val z: Int? = null,
+    val isIdoc: Boolean = false,
+)
+
+/**
+ * A champion-spawn board entry (`GET /public/shard/champs` + live `champ.update`).
+ * Three families share the board (`category`: champion / mini / sea); the
+ * category-specific fields are all nullable.
+ */
+@Serializable
+data class ChampDto(
+    val serial: String = "",
+    val category: String? = null,
+    val type: String? = null,
+    val name: String? = null,
+    val status: String? = null,
+    val active: Boolean = false,
+    val map: String? = null,
+    val x: Int? = null,
+    val y: Int? = null,
+    val z: Int? = null,
+    val bossUp: Boolean = false,
+    val boss: String? = null,
+    val level: Int? = null,
+    val maxLevel: Int? = null,
+    val kills: Int? = null,
+    val maxKills: Int? = null,
+    val hits: Long? = null,
+    val hitsMax: Long? = null,
+    val restartAt: String? = null,
+    val t: Long? = null,
+)
+
+/** A guild board entry (`GET /public/shard/guilds` + live `guild.update`). */
+@Serializable
+data class GuildDto(
+    val id: Long = 0,
+    val name: String? = null,
+    val abbr: String? = null,
+    val members: Int? = null,
+    val online: Int? = null,
+    val alliance: String? = null,
+    val leader: ActorDto? = null,
+    val t: Long? = null,
+)
+
+/** A town-governor board entry (`GET /public/shard/governors` + live `city.update`). */
+@Serializable
+data class GovernorDto(
+    val city: String = "",
+    val governor: ActorDto? = null,
+    val governorElect: ActorDto? = null,
+    val electionPhase: String? = null,
+    val t: Long? = null,
+)
+
+/** One term in a city's governor ledger (`GET /public/shard/governors/:city/history`). */
+@Serializable
+data class GovernorTermDto(
+    val city: String? = null,
+    val governor: ActorDto? = null,
+    val startedAt: Long? = null,
+    val endedAt: Long? = null,
+    val votes: Int? = null,
+)
+
+/** `GET /public/shard/presence` — the online-population aggregate (live `presence.online`). */
+@Serializable
+data class PresenceDto(
+    val count: Int = 0,
+    val byFacet: Map<String, Int> = emptyMap(),
+    val byRegion: Map<String, Int> = emptyMap(),
+    val t: Long? = null,
+)

app/src/main/java/com/runicgateway/app/data/api/dto/SsoDto.kt

@@ -0,0 +1,42 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.data.api.dto
+
+import kotlinx.serialization.SerialName
+import kotlinx.serialization.Serializable
+
+/**
+ * Wire shapes for the Mobile SSO Authorization Bridge (PLAN.md §4.2, M9). The
+ * success payload of `/auth/mobile/sso/exchange` is the shared [MobileTokenResponse]
+ * (same pair as `/auth/mobile/login`) — this file only adds the two shapes unique
+ * to the bridge. Every DTO ignores unknown keys (NetworkModule's lenient Json), so
+ * additive backend fields stay safe (§8).
+ */
+
+/**
+ * One entry of `GET /auth/providers` — public discovery, never secrets. [icon] is
+ * the provider kind (`google` | `discord` | `oidc` | `oauth2`); the app renders a
+ * button per provider from this list rather than hardcoding a set. [loginUrl] is
+ * the *website* start path (unused by the app, which builds its own
+ * `/auth/mobile/sso/start` URL); kept so the shape matches the backend exactly.
+ */
+@Serializable
+data class SsoProviderDto(
+    val id: String,
+    val name: String,
+    val icon: String? = null,
+    val loginUrl: String? = null,
+    val priority: Int? = null,
+)
+
+/**
+ * `POST /auth/mobile/sso/exchange` body — the one-time authorization code from the
+ * callback deep link plus the PKCE verifier stashed at `/start` (Layer B). Wire
+ * name is snake_case to match the backend's `{ code, code_verifier }`.
+ */
+@Serializable
+data class MobileSsoExchangeRequest(
+    val code: String,
+    @SerialName("code_verifier") val codeVerifier: String,
+)

app/src/main/java/com/runicgateway/app/data/repository/AccountRepository.kt

@@ -0,0 +1,120 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.data.repository
+
+import com.runicgateway.app.core.result.ApiResult
+import com.runicgateway.app.core.result.safeApiCall
+import com.runicgateway.app.data.api.MeApi
+import com.runicgateway.app.data.api.dto.ChangePasswordRequest
+import com.runicgateway.app.data.api.dto.ChangeUsernameRequest
+import com.runicgateway.app.data.api.dto.LinkedIdentityDto
+import com.runicgateway.app.data.api.dto.PlayerAccountDto
+import com.runicgateway.app.data.api.dto.RecoveryCodesDto
+import com.runicgateway.app.data.api.dto.RecoveryGenerateRequest
+import com.runicgateway.app.data.api.dto.RecoveryStatusDto
+import com.runicgateway.app.data.api.dto.TotpCodeRequest
+import com.runicgateway.app.data.api.dto.TotpSetupDto
+import com.runicgateway.app.data.api.dto.TotpStateDto
+import com.runicgateway.app.data.api.dto.TrustDeviceRequest
+import com.runicgateway.app.data.api.dto.TrustedDeviceDto
+import com.runicgateway.app.data.api.dto.TrustedDeviceLimitDto
+import com.runicgateway.app.data.api.dto.UsernameResponse
+import kotlinx.coroutines.CancellationException
+import kotlinx.serialization.json.Json
+import java.io.IOException
+import javax.inject.Inject
+import javax.inject.Singleton
+
+/**
+ * Self-service account management over the role-agnostic `/auth/me/account*`
+ * surface (PLAN.md §6.3, §6.4). Every call returns a typed [ApiResult] so the
+ * screens can map known statuses (409 taken, 400 wrong password / invalid code,
+ * 429 rate-limited) to friendly copy without a repository ever throwing (§7).
+ */
+@Singleton
+class AccountRepository @Inject constructor(
+    private val api: MeApi,
+    private val json: Json,
+) {
+    suspend fun getAccount(): ApiResult<PlayerAccountDto> = safeApiCall { api.getAccount() }
+
+    suspend fun changeUsername(username: String): ApiResult<UsernameResponse> =
+        safeApiCall { api.changeUsername(ChangeUsernameRequest(username)) }
+
+    /** [currentPassword] is null only for an SSO account setting its first password. */
+    suspend fun changePassword(newPassword: String, currentPassword: String?): ApiResult<Unit> =
+        safeApiCall { api.changePassword(ChangePasswordRequest(newPassword, currentPassword)) }
+
+    suspend fun totpSetup(): ApiResult<TotpSetupDto> = safeApiCall { api.totpSetup() }
+
+    suspend fun totpEnable(code: String): ApiResult<TotpStateDto> =
+        safeApiCall { api.totpEnable(TotpCodeRequest(code)) }
+
+    suspend fun totpDisable(code: String): ApiResult<TotpStateDto> =
+        safeApiCall { api.totpDisable(TotpCodeRequest(code)) }
+
+    suspend fun identities(): ApiResult<List<LinkedIdentityDto>> = safeApiCall { api.identities() }
+
+    suspend fun unlinkIdentity(provider: String): ApiResult<Unit> =
+        safeApiCall { api.unlinkIdentity(provider) }
+
+    // ── Trusted devices (TRUSTED_DEVICES_MFA.md) ───────────────────────────
+
+    suspend fun trustedDevices(): ApiResult<List<TrustedDeviceDto>> =
+        safeApiCall { api.trustedDevices() }
+
+    /** The distinct outcomes of trusting the current device — the cap is a first-class case. */
+    sealed interface TrustOutcome {
+        /** Trusted; [trustToken] is the opaque token to persist (native). */
+        data class Trusted(val trustToken: String?) : TrustOutcome
+
+        /** At the per-user cap — [devices] must be pruned before retrying. */
+        data class LimitReached(val devices: List<TrustedDeviceDto>) : TrustOutcome
+        data object NetworkError : TrustOutcome
+        data object ServerError : TrustOutcome
+    }
+
+    /**
+     * Trust the current device. Reads the raw response so the `409 { error, devices }`
+     * cap body survives (a thrown [retrofit2.HttpException] would discard it).
+     */
+    suspend fun trustThisDevice(deviceName: String? = null): TrustOutcome {
+        val response = try {
+            api.trustThisDevice(TrustDeviceRequest(deviceName))
+        } catch (e: CancellationException) {
+            throw e
+        } catch (_: IOException) {
+            return TrustOutcome.NetworkError
+        } catch (_: Exception) {
+            return TrustOutcome.ServerError
+        }
+        if (response.isSuccessful) {
+            return TrustOutcome.Trusted(response.body()?.trustToken)
+        }
+        if (response.code() == 409) {
+            val devices = runCatching {
+                val raw = response.errorBody()?.string()
+                if (raw.isNullOrBlank()) emptyList()
+                else json.decodeFromString<TrustedDeviceLimitDto>(raw).devices
+            }.getOrDefault(emptyList())
+            return TrustOutcome.LimitReached(devices)
+        }
+        return TrustOutcome.ServerError
+    }
+
+    suspend fun revokeTrustedDevice(id: Long): ApiResult<Boolean> =
+        safeApiCall { api.revokeTrustedDevice(id).revoked }
+
+    suspend fun revokeAllTrustedDevices(): ApiResult<Int> =
+        safeApiCall { api.revokeAllTrustedDevices().revoked }
+
+    // ── Recovery (backup) codes ────────────────────────────────────────────
+
+    suspend fun recoveryCodesStatus(): ApiResult<RecoveryStatusDto> =
+        safeApiCall { api.recoveryCodesStatus() }
+
+    /** Regenerate the single-use codes (password step-up). Returned once — never stored. */
+    suspend fun generateRecoveryCodes(currentPassword: String?): ApiResult<RecoveryCodesDto> =
+        safeApiCall { api.generateRecoveryCodes(RecoveryGenerateRequest(currentPassword)) }
+}

app/src/main/java/com/runicgateway/app/data/repository/AdminRepository.kt

@@ -0,0 +1,94 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.data.repository
+
+import com.runicgateway.app.core.result.ApiResult
+import com.runicgateway.app.core.result.safeApiCall
+import com.runicgateway.app.data.api.AdminApi
+import com.runicgateway.app.data.api.dto.AdminDashboardDto
+import com.runicgateway.app.data.api.dto.AdminPostDto
+import com.runicgateway.app.data.api.dto.BanRequest
+import com.runicgateway.app.data.api.dto.BroadcastRequest
+import com.runicgateway.app.data.api.dto.KickRequest
+import com.runicgateway.app.data.api.dto.PageRespondRequest
+import com.runicgateway.app.data.api.dto.PostCreateRequest
+import com.runicgateway.app.data.api.dto.PublishRequest
+import com.runicgateway.app.data.api.dto.SiteModeRequest
+import com.runicgateway.app.data.api.dto.SiteModeStateDto
+import com.runicgateway.app.data.api.dto.SupportPageDto
+import com.runicgateway.app.data.api.dto.UnbanRequest
+import com.runicgateway.app.data.api.dto.AdminWikiCategoryDto
+import com.runicgateway.app.data.api.dto.WikiCategoryRequest
+import com.runicgateway.app.data.api.dto.AdminWikiTagDto
+import retrofit2.HttpException
+import retrofit2.Response
+import javax.inject.Inject
+import javax.inject.Singleton
+
+/**
+ * The M10 staff-operations data source over `/api/v1/admin/…` (PLAN.md §1, §6.4).
+ * Every call returns a typed [ApiResult] so a screen renders a clean error/retry
+ * rather than crashing — a `403` (role lost since the menu rendered) and a `503`
+ * (shard/sidecar offline for the shard-write actions) are both expected outcomes
+ * the UI handles, never thrown. Role is authoritative on the server.
+ */
+@Singleton
+class AdminRepository @Inject constructor(
+    private val api: AdminApi,
+) {
+    suspend fun dashboard(): ApiResult<AdminDashboardDto> = safeApiCall { api.dashboard() }
+
+    suspend fun setSiteMode(mode: String): ApiResult<SiteModeStateDto> =
+        safeApiCall { api.setSiteMode(SiteModeRequest(mode)) }
+
+    // ── Content: news posts ───────────────────────────────────────────────
+    suspend fun posts(): ApiResult<List<AdminPostDto>> = safeApiCall { api.posts() }
+
+    suspend fun createPost(body: PostCreateRequest): ApiResult<AdminPostDto> =
+        safeApiCall { api.createPost(body) }
+
+    suspend fun setPostPublished(id: Long, published: Boolean): ApiResult<AdminPostDto> =
+        safeApiCall { api.publishPost(id, PublishRequest(published)) }
+
+    suspend fun deletePost(id: Long): ApiResult<Unit> = safeApiCall { api.deletePost(id).requireOk() }
+
+    // ── Content: wiki taxonomy ────────────────────────────────────────────
+    suspend fun wikiCategories(): ApiResult<List<AdminWikiCategoryDto>> = safeApiCall { api.wikiCategories() }
+
+    suspend fun createWikiCategory(body: WikiCategoryRequest): ApiResult<AdminWikiCategoryDto> =
+        safeApiCall { api.createWikiCategory(body) }
+
+    suspend fun deleteWikiCategory(id: Long): ApiResult<Unit> =
+        safeApiCall { api.deleteWikiCategory(id).requireOk() }
+
+    suspend fun wikiTags(): ApiResult<List<AdminWikiTagDto>> = safeApiCall { api.wikiTags() }
+
+    // ── Moderation: shard write plane ─────────────────────────────────────
+    suspend fun kick(account: String?, serial: String?): ApiResult<Unit> =
+        safeApiCall { api.kick(KickRequest(account, serial)).requireOk() }
+
+    suspend fun ban(account: String?, serial: String?, durationSec: Long?, reason: String?): ApiResult<Unit> =
+        safeApiCall { api.ban(BanRequest(account, serial, durationSec, reason)).requireOk() }
+
+    suspend fun unban(account: String): ApiResult<Unit> =
+        safeApiCall { api.unban(UnbanRequest(account)).requireOk() }
+
+    suspend fun broadcast(text: String, hue: Int?): ApiResult<Unit> =
+        safeApiCall { api.broadcast(BroadcastRequest(text, hue)).requireOk() }
+
+    // ── Support queue: help pages ─────────────────────────────────────────
+    suspend fun supportPages(): ApiResult<List<SupportPageDto>> = safeApiCall { api.supportPages() }
+
+    suspend fun respondPage(id: String, message: String, close: Boolean): ApiResult<Unit> =
+        safeApiCall { api.respondPage(id, PageRespondRequest(message, close)).requireOk() }
+
+    suspend fun closePage(id: String): ApiResult<Unit> =
+        safeApiCall { api.closePage(id).requireOk() }
+
+    /** Turn a bodyless [Response] into a thrown [HttpException] on a non-2xx, so
+     *  [safeApiCall] can fold it into an [ApiResult.HttpError] like every other call. */
+    private fun Response<Unit>.requireOk() {
+        if (!isSuccessful) throw HttpException(this)
+    }
+}

app/src/main/java/com/runicgateway/app/data/repository/AuthRepository.kt

@@ -0,0 +1,227 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.data.repository
+
+import com.runicgateway.app.core.auth.DeviceNameProvider
+import com.runicgateway.app.core.auth.SessionManager
+import com.runicgateway.app.core.auth.TrustTokenStore
+import com.runicgateway.app.core.push.PushManager
+import com.runicgateway.app.data.api.AuthApi
+import com.runicgateway.app.data.api.SsoApi
+import com.runicgateway.app.data.api.dto.MobileLoginRequest
+import com.runicgateway.app.data.api.dto.MobileLogoutRequest
+import com.runicgateway.app.data.api.dto.MobileTokenResponse
+import com.runicgateway.app.data.api.dto.SsoProviderDto
+import com.runicgateway.app.data.api.dto.TotpRequiredError
+import com.runicgateway.app.data.api.dto.TrustedDeviceDto
+import kotlinx.coroutines.CancellationException
+import kotlinx.coroutines.delay
+import kotlinx.serialization.json.Json
+import retrofit2.Response
+import java.io.IOException
+import javax.inject.Inject
+import javax.inject.Singleton
+
+/**
+ * Native username/password (+TOTP) auth — the app's only native credential flow
+ * (PLAN.md §4.1). It drives the [SessionManager]: a successful login establishes
+ * the session; logout revokes it. Registration/invite/reset/SSO are website
+ * hand-offs (§4.2), not here.
+ */
+@Singleton
+class AuthRepository @Inject constructor(
+    private val authApi: AuthApi,
+    private val ssoApi: SsoApi,
+    private val sessionManager: SessionManager,
+    private val pushManager: PushManager,
+    private val trustTokenStore: TrustTokenStore,
+    private val deviceNameProvider: DeviceNameProvider,
+    private val json: Json,
+) {
+
+    /** The three outcomes of SSO provider discovery, so the login screen can tell a
+     *  shard that offers no SSO ([None]) apart from a discovery that failed
+     *  ([Unavailable], offer a retry) — the old "empty on any failure" conflation hid
+     *  a broken call behind a dead website hand-off (§4.2). */
+    sealed interface SsoDiscovery {
+        /** At least one enabled provider — render a native button per entry. */
+        data class Available(val providers: List<SsoProviderDto>) : SsoDiscovery
+
+        /** Discovery succeeded but the shard has no SSO providers configured. */
+        data object None : SsoDiscovery
+
+        /** The discovery call failed (offline / server error) — surface a retry. */
+        data object Unavailable : SsoDiscovery
+    }
+
+    /**
+     * Discover the shard's enabled SSO providers for the native login buttons (§4.2).
+     * Public discovery, never secrets. Retries once before reporting [Unavailable],
+     * so a single transient blip doesn't strand the user.
+     */
+    suspend fun ssoProviders(): SsoDiscovery {
+        var lastFailed = false
+        repeat(2) { attempt ->
+            try {
+                val providers = ssoApi.providers()
+                return if (providers.isEmpty()) SsoDiscovery.None else SsoDiscovery.Available(providers)
+            } catch (e: CancellationException) {
+                throw e
+            } catch (_: Exception) {
+                lastFailed = true
+                if (attempt == 0) delay(DISCOVERY_RETRY_DELAY_MS)
+            }
+        }
+        return if (lastFailed) SsoDiscovery.Unavailable else SsoDiscovery.None
+    }
+
+    /** Outcome of a login attempt (§4.1). */
+    sealed interface LoginResult {
+        /**
+         * Signed in. [trustLimitReached] is true when "trust this device" was asked
+         * for but the per-user cap blocked it (the login still succeeded, but no trust
+         * token was issued); [devices] then lists the trusted devices to manage.
+         */
+        data class Success(
+            val trustLimitReached: Boolean = false,
+            val devices: List<TrustedDeviceDto> = emptyList(),
+        ) : LoginResult
+
+        /** The account has 2FA on — reveal the code field and resubmit with a code. */
+        data object TotpRequired : LoginResult
+        data object InvalidCredentials : LoginResult
+
+        /** Guarded by per-IP backoff → slowdown → hard cap; back off and retry. */
+        data object RateLimited : LoginResult
+
+        /** Any other server failure (5xx / unexpected). */
+        data object ServerError : LoginResult
+
+        /** No answer — offline, DNS, TLS, timeout. */
+        data object NetworkError : LoginResult
+    }
+
+    /**
+     * Native login (TRUSTED_DEVICES_MFA.md). A stored trust token bound to [username]
+     * rides the `X-Trust-Token` header so a trusted device skips the TOTP step. A
+     * second factor is either a [code] (TOTP) or a single-use [recoveryCode]. With
+     * [trustDevice], the server may return a fresh trust token to persist for next time.
+     */
+    suspend fun login(
+        username: String,
+        password: String,
+        code: String? = null,
+        recoveryCode: String? = null,
+        trustDevice: Boolean = false,
+    ): LoginResult {
+        val storedTrustToken = trustTokenStore.tokenFor(username)
+        val response: Response<MobileTokenResponse> = try {
+            authApi.login(
+                MobileLoginRequest(
+                    username = username,
+                    password = password,
+                    code = code,
+                    recoveryCode = recoveryCode,
+                    trustDevice = trustDevice.takeIf { it },
+                    device_name = if (trustDevice) deviceNameProvider.deviceName() else null,
+                ),
+                trustToken = storedTrustToken,
+            )
+        } catch (e: CancellationException) {
+            throw e
+        } catch (_: IOException) {
+            return LoginResult.NetworkError
+        }
+
+        if (response.isSuccessful) {
+            val body = response.body() ?: return LoginResult.ServerError
+            // Persist a freshly minted trust token (scoped to this account) so the next
+            // login skips the second factor — it deliberately outlives logout.
+            body.trustToken?.let { trustTokenStore.save(username, it) }
+            sessionManager.onSignedIn(body.accessToken, body.refreshToken, body.user)
+            return LoginResult.Success(
+                trustLimitReached = body.trustLimitReached,
+                devices = body.devices,
+            )
+        }
+
+        return when (response.code()) {
+            401 -> if (isTotpRequired(response)) LoginResult.TotpRequired else LoginResult.InvalidCredentials
+            429 -> LoginResult.RateLimited
+            else -> LoginResult.ServerError
+        }
+    }
+
+    /**
+     * Persist a trust token minted by the self-service "trust this device" action
+     * (Account → Trusted Devices), scoped to [username] exactly like the login path.
+     */
+    fun saveTrustToken(username: String, token: String) = trustTokenStore.save(username, token)
+
+    /**
+     * Drop the locally stored trust token so this device stops skipping the TOTP step
+     * (used after "untrust all" and on a Settings → Server switch). Server-side
+     * revocation makes any surviving token inert anyway — the next login just prompts
+     * for the code — so this is a client-side cleanliness step, never load-bearing.
+     */
+    fun clearTrustToken() = trustTokenStore.clear()
+
+    /**
+     * Revoke this session (or, with [allDevices], every session) and clear local
+     * tokens (§4.3). Best-effort: the local session is torn down even if the
+     * network call fails, so the user is always signed out locally.
+     */
+    suspend fun logout(allDevices: Boolean = false) {
+        // Deregister this device's push endpoint while the bearer is still valid, so
+        // no orphan device row is left behind (§11). Keeps the opt-in intent so push
+        // resumes on the next sign-in; best-effort, never blocks the logout.
+        try {
+            pushManager.deregisterDevice()
+        } catch (e: CancellationException) {
+            throw e
+        } catch (_: Exception) {
+            // Ignore — local session teardown proceeds regardless.
+        }
+        val refreshToken = sessionManager.currentRefreshToken()
+        try {
+            authApi.logout(MobileLogoutRequest(refreshToken = refreshToken, all = allDevices))
+        } catch (e: CancellationException) {
+            throw e
+        } catch (_: Exception) {
+            // Ignore — we still drop the local session below.
+        }
+        sessionManager.onSignedOut()
+    }
+
+    /**
+     * Re-validate the session against `GET /auth/me` on app resume (§4.3). A
+     * success refreshes the cached role (roles change server-side); a `401` that
+     * survives the silent refresh means the session is dead → sign out. Transient
+     * failures are ignored so a flaky network doesn't bounce the user.
+     */
+    suspend fun revalidate() {
+        if (!sessionManager.isSignedIn) return
+        try {
+            val me = authApi.me()
+            sessionManager.onUserRefreshed(me.user)
+        } catch (e: CancellationException) {
+            throw e
+        } catch (e: retrofit2.HttpException) {
+            if (e.code() == 401) sessionManager.onSignedOut()
+        } catch (_: IOException) {
+            // Offline — keep the session; the next authed call will re-check.
+        }
+    }
+
+    private fun isTotpRequired(response: Response<*>): Boolean = try {
+        val raw = response.errorBody()?.string()
+        !raw.isNullOrBlank() && json.decodeFromString<TotpRequiredError>(raw).totpRequired
+    } catch (_: Exception) {
+        false
+    }
+
+    private companion object {
+        const val DISCOVERY_RETRY_DELAY_MS = 400L
+    }
+}

app/src/main/java/com/runicgateway/app/data/repository/ConnectionRepository.kt

@@ -3,6 +3,8 @@
  */
 package com.runicgateway.app.data.repository
 
+import com.runicgateway.app.core.auth.SessionManager
+import com.runicgateway.app.core.auth.TrustTokenStore
 import com.runicgateway.app.core.net.BaseUrlHolder
 import com.runicgateway.app.core.net.ServerUrl
 import com.runicgateway.app.core.prefs.ServerPreferences
@@ -24,6 +26,9 @@ class ConnectionRepository @Inject constructor(
     private val api: PublicApi,
     private val prefs: ServerPreferences,
     private val baseUrlHolder: BaseUrlHolder,
+    private val sessionManager: SessionManager,
+    private val trustTokenStore: TrustTokenStore,
+    private val pushManager: com.runicgateway.app.core.push.PushManager,
     private val config: com.runicgateway.app.core.AppConfig,
 ) {
 
@@ -34,6 +39,13 @@ class ConnectionRepository @Inject constructor(
 
         /** Reachable and 2xx, but not a Runic Gateway backend (wrong version identity). */
         data object NotRunicGateway : ProbeResult
+
+        /**
+         * A Runic Gateway backend, but speaking an API version this app build does
+         * not support (§3 version guard) — refuse rather than mis-render. [serverApi]
+         * is what the site reported; [supportedApi] is what this app speaks.
+         */
+        data class VersionMismatch(val serverApi: String, val supportedApi: String) : ProbeResult
         data class ServerError(val status: Int) : ProbeResult
         data class Unreachable(val cause: Throwable) : ProbeResult
     }
@@ -66,14 +78,15 @@ class ConnectionRepository @Inject constructor(
             ?: return ProbeResult.InvalidUrl(ServerUrl.Reason.MALFORMED)
 
         return when (val result = safeApiCall { api.probeStatus(statusUrl) }) {
-            is ApiResult.Ok -> {
-                if (!result.data.version.service.equals(RUNIC_SERVICE_ID, ignoreCase = true)) {
-                    ProbeResult.NotRunicGateway
-                } else {
+            is ApiResult.Ok -> when (val verdict = evaluateVersion(result.data.version)) {
+                is VersionVerdict.Ok -> {
                     prefs.setBaseUrl(normalized.toString())
                     baseUrlHolder.set(normalized)
                     ProbeResult.Success(result.data)
                 }
+                is VersionVerdict.NotRunicGateway -> ProbeResult.NotRunicGateway
+                is VersionVerdict.Mismatch ->
+                    ProbeResult.VersionMismatch(serverApi = verdict.serverApi, supportedApi = SUPPORTED_API)
             }
             is ApiResult.HttpError -> ProbeResult.ServerError(result.status)
             is ApiResult.NetworkError -> ProbeResult.Unreachable(result.cause)
@@ -81,15 +94,59 @@ class ConnectionRepository @Inject constructor(
     }
 
     /**
-     * Hard reset for a Settings → Server switch (§3): clear the saved URL and
-     * deactivate it. Token/cache clearing joins here in M3 once sessions exist.
+     * Hard reset for a Settings → Server switch (§3): sign out (clear stored
+     * tokens), clear the saved URL, and deactivate it — the app returns to a
+     * signed-out state against the new host.
      */
     suspend fun disconnect() {
+        // Deregister the push endpoint on the current (old) host while still authed,
+        // then clear the shard's ntfy URL — the new host advertises its own (§11).
+        try {
+            pushManager.deregisterDevice()
+        } catch (_: Exception) {
+            // Best-effort; the reset proceeds regardless.
+        }
+        pushManager.setNtfyUrl(null)
+        sessionManager.onSignedOut()
+        // The trust token is bound to the old host — drop it so we don't replay it
+        // against a different shard (it survives a plain logout, but not a host switch).
+        trustTokenStore.clear()
         prefs.clear()
         baseUrlHolder.set(null)
     }
 
-    private companion object {
+    /** The pure outcome of inspecting a probed site's [VersionDto] (§3 version guard). */
+    internal sealed interface VersionVerdict {
+        data object Ok : VersionVerdict
+        data object NotRunicGateway : VersionVerdict
+        data class Mismatch(val serverApi: String) : VersionVerdict
+    }
+
+    internal companion object {
         const val RUNIC_SERVICE_ID = "runic-gateway"
+
+        /** The backend API major version this app build speaks (matches `/public/version` `api`). */
+        const val SUPPORTED_API = "v1"
+
+        /**
+         * Decide whether a probed site is a Runic Gateway backend this app can talk
+         * to. Pure (no I/O) so it is unit-testable without a live site. Lenient on a
+         * blank `api` (an older backend that predates version surfacing); refuses only
+         * an API version we positively know we can't parse (e.g. a future `v2`).
+         */
+        fun evaluateVersion(
+            version: com.runicgateway.app.data.api.dto.VersionDto,
+            supportedApi: String = SUPPORTED_API,
+        ): VersionVerdict {
+            if (!version.service.trim().equals(RUNIC_SERVICE_ID, ignoreCase = true)) {
+                return VersionVerdict.NotRunicGateway
+            }
+            val serverApi = version.api.trim()
+            return when {
+                serverApi.isEmpty() -> VersionVerdict.Ok
+                serverApi.equals(supportedApi, ignoreCase = true) -> VersionVerdict.Ok
+                else -> VersionVerdict.Mismatch(serverApi)
+            }
+        }
     }
 }

app/src/main/java/com/runicgateway/app/data/repository/NotificationsRepository.kt

@@ -0,0 +1,40 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.data.repository
+
+import com.runicgateway.app.core.result.ApiResult
+import com.runicgateway.app.core.result.safeApiCall
+import com.runicgateway.app.data.api.NotificationsApi
+import com.runicgateway.app.data.api.dto.NotificationStreamsDto
+import com.runicgateway.app.data.api.dto.NotificationSubscriptionsDto
+import com.runicgateway.app.data.api.dto.PushDeviceDto
+import com.runicgateway.app.data.api.dto.RegisterDeviceRequest
+import javax.inject.Inject
+import javax.inject.Singleton
+
+/**
+ * Device registration + per-user stream subscriptions over the opt-in push surface
+ * (PLAN.md §11, M7 Part 2). Every call returns a typed [ApiResult] so the screen
+ * and the [com.runicgateway.app.core.push.PushManager] degrade gracefully — a `400`
+ * (endpoint off the shard's allow-set) or a down backend never throws (§7).
+ */
+@Singleton
+class NotificationsRepository @Inject constructor(
+    private val api: NotificationsApi,
+) {
+    suspend fun registerDevice(endpoint: String, platform: String?): ApiResult<PushDeviceDto> =
+        safeApiCall { api.registerDevice(RegisterDeviceRequest(endpoint = endpoint, platform = platform)) }
+
+    suspend fun listDevices(): ApiResult<List<PushDeviceDto>> = safeApiCall { api.listDevices() }
+
+    suspend fun deleteDevice(id: Long): ApiResult<Unit> = safeApiCall { api.deleteDevice(id) }
+
+    suspend fun streams(): ApiResult<NotificationStreamsDto> = safeApiCall { api.streams() }
+
+    suspend fun subscriptions(): ApiResult<NotificationSubscriptionsDto> =
+        safeApiCall { api.subscriptions() }
+
+    suspend fun setSubscriptions(streams: List<String>): ApiResult<NotificationSubscriptionsDto> =
+        safeApiCall { api.putSubscriptions(NotificationSubscriptionsDto(streams)) }
+}

app/src/main/java/com/runicgateway/app/data/repository/PlayerShardRepository.kt

@@ -0,0 +1,50 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.data.repository
+
+import com.runicgateway.app.core.result.ApiResult
+import com.runicgateway.app.core.result.safeApiCall
+import com.runicgateway.app.data.api.PlayerShardApi
+import com.runicgateway.app.data.api.dto.CharProfileDto
+import com.runicgateway.app.data.api.dto.CreateGameAccountRequest
+import com.runicgateway.app.data.api.dto.PlayerHouseDto
+import com.runicgateway.app.data.api.dto.RosterDto
+import com.runicgateway.app.data.api.dto.ShardLinkDto
+import com.runicgateway.app.data.api.dto.ShardLinkRequest
+import com.runicgateway.app.data.api.dto.ShardLinkResultDto
+import com.runicgateway.app.data.api.dto.VendorSaleDto
+import com.runicgateway.app.data.api.dto.VendorSnapshotDto
+import javax.inject.Inject
+import javax.inject.Singleton
+
+/**
+ * A player's own game data + game-account linking (PLAN.md §6.3), over the
+ * bearer-gated `/player/shard/…` surface. Every read returns a typed [ApiResult]
+ * so a down shard (`503`) renders as "offline, retry" and a not-linked account
+ * (`403`) is handled cleanly — the repository never throws for an expected
+ * failure (§7). Ownership is enforced server-side.
+ */
+@Singleton
+class PlayerShardRepository @Inject constructor(
+    private val api: PlayerShardApi,
+) {
+    suspend fun link(code: String): ApiResult<ShardLinkResultDto> =
+        safeApiCall { api.link(ShardLinkRequest(code)) }
+
+    suspend fun createAccount(account: String, password: String): ApiResult<ShardLinkResultDto> =
+        safeApiCall { api.createAccount(CreateGameAccountRequest(account, password)) }
+
+    suspend fun accounts(): ApiResult<List<ShardLinkDto>> = safeApiCall { api.accounts() }
+
+    suspend fun roster(account: String): ApiResult<RosterDto> = safeApiCall { api.roster(account) }
+
+    suspend fun char(serial: String): ApiResult<CharProfileDto> = safeApiCall { api.char(serial) }
+
+    suspend fun vendors(account: String): ApiResult<VendorSnapshotDto> =
+        safeApiCall { api.vendors(account) }
+
+    suspend fun sales(): ApiResult<List<VendorSaleDto>> = safeApiCall { api.sales() }
+
+    suspend fun houses(): ApiResult<List<PlayerHouseDto>> = safeApiCall { api.houses() }
+}

app/src/main/java/com/runicgateway/app/data/repository/ShardRepository.kt

@@ -0,0 +1,81 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.data.repository
+
+import com.runicgateway.app.core.net.ShardStream
+import com.runicgateway.app.core.net.ShardStreamEvent
+import com.runicgateway.app.core.result.ApiResult
+import com.runicgateway.app.core.result.safeApiCall
+import com.runicgateway.app.data.api.PublicApi
+import com.runicgateway.app.data.api.dto.ChampDto
+import com.runicgateway.app.data.api.dto.EconomySampleDto
+import com.runicgateway.app.data.api.dto.FeedEventDto
+import com.runicgateway.app.data.api.dto.GovernorDto
+import com.runicgateway.app.data.api.dto.GovernorTermDto
+import com.runicgateway.app.data.api.dto.GuildDto
+import com.runicgateway.app.data.api.dto.HouseDto
+import com.runicgateway.app.data.api.dto.OnlineStaffDto
+import com.runicgateway.app.data.api.dto.PresenceDto
+import com.runicgateway.app.data.api.dto.ShardStatusDto
+import kotlinx.coroutines.flow.Flow
+import kotlinx.serialization.KSerializer
+import kotlinx.serialization.json.Json
+import kotlinx.serialization.json.JsonObject
+import javax.inject.Inject
+import javax.inject.Singleton
+
+/**
+ * The public shard widgets (PLAN.md §6.2): point-in-time board snapshots over
+ * the `/public/shard/…` GETs plus the live SSE stream. Every read returns a typed
+ * [ApiResult] so a down shard renders as offline (§7); [liveEvents] is the shared
+ * SSE feed the boards merge in place. Live `*.update` frames decode into the same
+ * DTOs as the snapshot reads via the `*Frame` decoders.
+ */
+@Singleton
+class ShardRepository @Inject constructor(
+    private val api: PublicApi,
+    private val stream: ShardStream,
+    private val json: Json,
+) {
+    // ── Snapshots ────────────────────────────────────────────────────────
+    suspend fun status(): ApiResult<ShardStatusDto> = safeApiCall { api.getShardStatus() }
+
+    suspend fun feed(limit: Int = 40): ApiResult<List<FeedEventDto>> =
+        safeApiCall { api.getShardFeed(limit = limit) }
+
+    suspend fun economy(limit: Int = 100): ApiResult<List<EconomySampleDto>> =
+        safeApiCall { api.getShardEconomy(limit) }
+
+    suspend fun online(): ApiResult<List<OnlineStaffDto>> = safeApiCall { api.getShardOnline() }
+
+    suspend fun presence(): ApiResult<PresenceDto> = safeApiCall { api.getShardPresence() }
+
+    suspend fun champs(): ApiResult<List<ChampDto>> = safeApiCall { api.getShardChamps() }
+
+    suspend fun guilds(): ApiResult<List<GuildDto>> = safeApiCall { api.getShardGuilds() }
+
+    suspend fun governors(): ApiResult<List<GovernorDto>> = safeApiCall { api.getShardGovernors() }
+
+    suspend fun governorHistory(city: String, limit: Int = 25): ApiResult<List<GovernorTermDto>> =
+        safeApiCall { api.getShardGovernorHistory(city, limit) }
+
+    suspend fun houses(): ApiResult<List<HouseDto>> = safeApiCall { api.getShardHouses() }
+
+    // ── Live stream ──────────────────────────────────────────────────────
+    /** The shared public SSE feed (safe kinds only), reconnecting with backoff (§7). */
+    fun liveEvents(): Flow<ShardStreamEvent> = stream.events()
+
+    // Decode a live `*.update` frame into the board DTO it mirrors; null on shape
+    // mismatch so a malformed frame is skipped rather than crashing the board.
+    fun champFrame(obj: JsonObject): ChampDto? = decode(obj, ChampDto.serializer())
+    fun guildFrame(obj: JsonObject): GuildDto? = decode(obj, GuildDto.serializer())
+    fun governorFrame(obj: JsonObject): GovernorDto? = decode(obj, GovernorDto.serializer())
+    fun presenceFrame(obj: JsonObject): PresenceDto? = decode(obj, PresenceDto.serializer())
+
+    private fun <T> decode(obj: JsonObject, serializer: KSerializer<T>): T? = try {
+        json.decodeFromJsonElement(serializer, obj)
+    } catch (_: Exception) {
+        null
+    }
+}

app/src/main/java/com/runicgateway/app/di/NetworkModule.kt

@@ -6,10 +6,21 @@ package com.runicgateway.app.di
 import android.os.Build
 import com.jakewharton.retrofit2.converter.kotlinx.serialization.asConverterFactory
 import com.runicgateway.app.BuildConfig
+import com.runicgateway.app.core.net.AuthInterceptor
 import com.runicgateway.app.core.net.BaseUrlHolder
 import com.runicgateway.app.core.net.HostSelectionInterceptor
+import com.runicgateway.app.core.net.ShardStream
+import com.runicgateway.app.core.net.ShardStreamClient
+import com.runicgateway.app.core.net.TokenAuthenticator
 import com.runicgateway.app.core.net.UserAgentInterceptor
+import com.runicgateway.app.data.api.AuthApi
+import com.runicgateway.app.data.api.AuthRefreshApi
+import com.runicgateway.app.data.api.MeApi
+import com.runicgateway.app.data.api.AdminApi
+import com.runicgateway.app.data.api.NotificationsApi
+import com.runicgateway.app.data.api.PlayerShardApi
 import com.runicgateway.app.data.api.PublicApi
+import com.runicgateway.app.data.api.SsoApi
 import dagger.Module
 import dagger.Provides
 import dagger.hilt.InstallIn
@@ -42,16 +53,25 @@ object NetworkModule {
         return UserAgentInterceptor(ua)
     }
 
+    /**
+     * The main client every API and the SSE stream ride on. Order: identify (UA),
+     * retarget onto the configured shard host, then attach the bearer; the
+     * [TokenAuthenticator] handles silent refresh-on-401 (§4.1). Logging sits last
+     * so it observes the final, authed request.
+     */
     @Provides
     @Singleton
     fun provideOkHttpClient(
         hostSelectionInterceptor: HostSelectionInterceptor,
         userAgentInterceptor: UserAgentInterceptor,
+        authInterceptor: AuthInterceptor,
+        tokenAuthenticator: TokenAuthenticator,
     ): OkHttpClient {
         val builder = OkHttpClient.Builder()
-            // User-Agent first, then host retargeting, so both apply to every call.
             .addInterceptor(userAgentInterceptor)
             .addInterceptor(hostSelectionInterceptor)
+            .addInterceptor(authInterceptor)
+            .authenticator(tokenAuthenticator)
 
         if (BuildConfig.DEBUG) {
             builder.addInterceptor(
@@ -75,4 +95,66 @@ object NetworkModule {
     @Provides
     @Singleton
     fun providePublicApi(retrofit: Retrofit): PublicApi = retrofit.create(PublicApi::class.java)
+
+    /** Expose the live SSE feed as the [ShardStream] capability so repositories depend
+     *  on the interface (unit-testable against a fake), not the OkHttp-backed client. */
+    @Provides
+    @Singleton
+    fun provideShardStream(client: ShardStreamClient): ShardStream = client
+
+    @Provides
+    @Singleton
+    fun provideAuthApi(retrofit: Retrofit): AuthApi = retrofit.create(AuthApi::class.java)
+
+    /** Native SSO discovery + code exchange (§4.2, M9) — on the main client. */
+    @Provides
+    @Singleton
+    fun provideSsoApi(retrofit: Retrofit): SsoApi = retrofit.create(SsoApi::class.java)
+
+    /** Role-agnostic self-service (§6.4) — bearer-authed on the main client. */
+    @Provides
+    @Singleton
+    fun provideMeApi(retrofit: Retrofit): MeApi = retrofit.create(MeApi::class.java)
+
+    /** A player's own game data + linking (§6.3) — bearer-authed on the main client. */
+    @Provides
+    @Singleton
+    fun providePlayerShardApi(retrofit: Retrofit): PlayerShardApi =
+        retrofit.create(PlayerShardApi::class.java)
+
+    /** Opt-in push devices + subscriptions (§11, M7) — bearer-authed on the main client. */
+    @Provides
+    @Singleton
+    fun provideNotificationsApi(retrofit: Retrofit): NotificationsApi =
+        retrofit.create(NotificationsApi::class.java)
+
+    /** Staff operations (§1, §6.4, M10) — bearer-authed; the server re-checks role every call. */
+    @Provides
+    @Singleton
+    fun provideAdminApi(retrofit: Retrofit): AdminApi = retrofit.create(AdminApi::class.java)
+
+    /**
+     * Token refresh runs on its own **bare** client — UA + host retargeting only,
+     * no auth interceptor and no authenticator — so a refresh can never recurse
+     * back through [TokenAuthenticator] (§4.3). This throwaway client/Retrofit is
+     * not exposed as a bean, so there is no ambiguous [OkHttpClient] binding.
+     */
+    @Provides
+    @Singleton
+    fun provideAuthRefreshApi(
+        hostSelectionInterceptor: HostSelectionInterceptor,
+        userAgentInterceptor: UserAgentInterceptor,
+        json: Json,
+    ): AuthRefreshApi {
+        val bareClient = OkHttpClient.Builder()
+            .addInterceptor(userAgentInterceptor)
+            .addInterceptor(hostSelectionInterceptor)
+            .build()
+        val retrofit = Retrofit.Builder()
+            .baseUrl(BaseUrlHolder.PLACEHOLDER_BASE_URL)
+            .client(bareClient)
+            .addConverterFactory(json.asConverterFactory("application/json".toMediaType()))
+            .build()
+        return retrofit.create(AuthRefreshApi::class.java)
+    }
 }

app/src/main/java/com/runicgateway/app/di/StorageModule.kt

@@ -0,0 +1,41 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.di
+
+import com.runicgateway.app.core.auth.BuildDeviceNameProvider
+import com.runicgateway.app.core.auth.DeviceNameProvider
+import com.runicgateway.app.core.auth.EncryptedTokenStore
+import com.runicgateway.app.core.auth.EncryptedTrustTokenStore
+import com.runicgateway.app.core.auth.TokenStore
+import com.runicgateway.app.core.auth.TrustTokenStore
+import com.runicgateway.app.core.auth.sso.EncryptedPendingSsoStore
+import com.runicgateway.app.core.auth.sso.PendingSsoStore
+import dagger.Binds
+import dagger.Module
+import dagger.hilt.InstallIn
+import dagger.hilt.components.SingletonComponent
+import javax.inject.Singleton
+
+/** Binds the at-rest stores to their EncryptedSharedPreferences impls (§4.3). */
+@Module
+@InstallIn(SingletonComponent::class)
+abstract class StorageModule {
+
+    @Binds
+    @Singleton
+    abstract fun bindTokenStore(impl: EncryptedTokenStore): TokenStore
+
+    @Binds
+    @Singleton
+    abstract fun bindPendingSsoStore(impl: EncryptedPendingSsoStore): PendingSsoStore
+
+    /** The trusted-device token store — its own encrypted file, outlives session teardown. */
+    @Binds
+    @Singleton
+    abstract fun bindTrustTokenStore(impl: EncryptedTrustTokenStore): TrustTokenStore
+
+    @Binds
+    @Singleton
+    abstract fun bindDeviceNameProvider(impl: BuildDeviceNameProvider): DeviceNameProvider
+}

app/src/main/java/com/runicgateway/app/ui/AppViewModel.kt

@@ -6,6 +6,7 @@ package com.runicgateway.app.ui
 import androidx.lifecycle.ViewModel
 import androidx.lifecycle.viewModelScope
 import com.runicgateway.app.core.net.BaseUrlHolder
+import com.runicgateway.app.core.push.PushManager
 import com.runicgateway.app.core.result.ApiResult
 import com.runicgateway.app.data.api.dto.BrandDto
 import com.runicgateway.app.data.repository.ConnectionRepository
@@ -27,6 +28,7 @@ class AppViewModel @Inject constructor(
     private val connectionRepository: ConnectionRepository,
     private val settingsRepository: SettingsRepository,
     private val baseUrlHolder: BaseUrlHolder,
+    private val pushManager: PushManager,
 ) : ViewModel() {
 
     sealed interface AppState {
@@ -66,8 +68,16 @@ class AppViewModel @Inject constructor(
         }
     }
 
-    private suspend fun loadBrand(): BrandDto? =
-        (settingsRepository.getSettings() as? ApiResult.Ok)?.data?.brand
+    /**
+     * Load public settings for branding and feed the shard's push relay URL into the
+     * [PushManager] (§11) — its arrival is what lets push re-register after a restart
+     * or sign-in. Returns the brand block (null if settings couldn't be loaded).
+     */
+    private suspend fun loadBrand(): BrandDto? {
+        val settings = (settingsRepository.getSettings() as? ApiResult.Ok)?.data
+        pushManager.setNtfyUrl(settings?.push?.ntfyUrl)
+        return settings?.brand
+    }
 
     /**
      * Resolve a possibly site-relative asset path (branding logos, post images)

app/src/main/java/com/runicgateway/app/ui/RunicApp.kt

@@ -3,10 +3,12 @@
  */
 package com.runicgateway.app.ui
 
+import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.Spacer
-import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.height
 import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.rememberScrollState
+import androidx.compose.foundation.verticalScroll
 import androidx.compose.material.icons.Icons
 import androidx.compose.material.icons.automirrored.filled.ArrowBack
 import androidx.compose.material.icons.filled.Menu
@@ -15,6 +17,7 @@ import androidx.compose.material3.ExperimentalMaterial3Api
 import androidx.compose.material3.HorizontalDivider
 import androidx.compose.material3.Icon
 import androidx.compose.material3.IconButton
+import androidx.compose.material3.MaterialTheme
 import androidx.compose.material3.ModalDrawerSheet
 import androidx.compose.material3.ModalNavigationDrawer
 import androidx.compose.material3.NavigationDrawerItem
@@ -22,13 +25,20 @@ import androidx.compose.material3.NavigationDrawerItemDefaults
 import androidx.compose.material3.Scaffold
 import androidx.compose.material3.Text
 import androidx.compose.material3.TopAppBar
+import androidx.compose.material3.TopAppBarDefaults
 import androidx.compose.material3.rememberDrawerState
 import androidx.compose.runtime.Composable
+import androidx.compose.runtime.LaunchedEffect
 import androidx.compose.runtime.getValue
 import androidx.compose.runtime.rememberCoroutineScope
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.text.style.TextOverflow
 import androidx.compose.ui.unit.dp
+import androidx.compose.ui.unit.sp
+import androidx.hilt.navigation.compose.hiltViewModel
+import androidx.lifecycle.compose.LifecycleResumeEffect
+import androidx.lifecycle.compose.collectAsStateWithLifecycle
 import androidx.navigation.NavHostController
 import androidx.navigation.NavType
 import androidx.navigation.compose.NavHost
@@ -37,37 +47,55 @@ import androidx.navigation.compose.currentBackStackEntryAsState
 import androidx.navigation.compose.rememberNavController
 import androidx.navigation.navArgument
 import com.runicgateway.app.R
+import com.runicgateway.app.core.auth.Session
 import com.runicgateway.app.data.api.dto.BrandDto
+import com.runicgateway.app.ui.auth.AccountScreen
+import com.runicgateway.app.ui.auth.LoginScreen
+import com.runicgateway.app.ui.auth.RecoveryCodesScreen
+import com.runicgateway.app.ui.auth.TrustedDevicesScreen
+import com.runicgateway.app.ui.auth.roleLabelRes
 import com.runicgateway.app.ui.contact.ContactScreen
 import com.runicgateway.app.ui.home.HomeScreen
+import com.runicgateway.app.ui.navigation.APP_MENU
 import com.runicgateway.app.ui.navigation.Routes
+import com.runicgateway.app.ui.navigation.visibleEntries
 import com.runicgateway.app.ui.news.NewsScreen
 import com.runicgateway.app.ui.news.PostScreen
+import com.runicgateway.app.ui.admin.AdminContentScreen
+import com.runicgateway.app.ui.admin.AdminDashboardScreen
+import com.runicgateway.app.ui.admin.AdminModerationScreen
+import com.runicgateway.app.ui.admin.AdminSupportScreen
+import com.runicgateway.app.ui.notifications.NotificationsScreen
 import com.runicgateway.app.ui.page.PageScreen
+import com.runicgateway.app.ui.player.CharacterSheetScreen
+import com.runicgateway.app.ui.player.CharactersScreen
+import com.runicgateway.app.ui.player.MyHousesScreen
+import com.runicgateway.app.ui.player.VendorsScreen
+import com.runicgateway.app.ui.session.SessionViewModel
+import com.runicgateway.app.ui.shard.ChampsScreen
+import com.runicgateway.app.ui.shard.GovernorsScreen
+import com.runicgateway.app.ui.shard.GuildsScreen
+import com.runicgateway.app.ui.shard.HousesScreen
+import com.runicgateway.app.ui.shard.ShardBoard
+import com.runicgateway.app.ui.shard.ShardScreen
 import com.runicgateway.app.ui.wiki.WikiPageScreen
 import com.runicgateway.app.ui.wiki.WikiScreen
 import kotlinx.coroutines.launch
 
-/** A navigation menu entry (PLAN.md §5). For M1 every entry is public. */
-private data class MenuEntry(val route: String, val labelRes: Int)
-
-private val PUBLIC_MENU = listOf(
-    MenuEntry(Routes.HOME, R.string.menu_home),
-    MenuEntry(Routes.NEWS, R.string.menu_news),
-    MenuEntry(Routes.WIKI, R.string.menu_wiki),
-    MenuEntry(Routes.page("about"), R.string.menu_about),
-    MenuEntry(Routes.CONTACT, R.string.menu_contact),
-)
-
 /** Destinations that show the drawer (hamburger); others show a back arrow. */
 private val TOP_LEVEL_ROUTES = setOf(
-    Routes.HOME, Routes.NEWS, Routes.WIKI, Routes.CONTACT, Routes.PAGE,
+    Routes.HOME, Routes.NEWS, Routes.WIKI, Routes.SHARD, Routes.CONTACT, Routes.PAGE, Routes.ACCOUNT,
+    Routes.NOTIFICATIONS,
+    Routes.PLAYER_CHARACTERS, Routes.PLAYER_VENDORS, Routes.PLAYER_HOUSES,
+    Routes.ADMIN_DASHBOARD, Routes.ADMIN_CONTENT, Routes.ADMIN_MODERATION, Routes.ADMIN_SUPPORT,
 )
 
 /**
  * The main app shell once a shard site is configured (PLAN.md §5): one shared,
- * declarative navigation drawer over the public content graph, plus the
- * Settings → Server switch. The signed-in menu groups and auth toggle join in M3.
+ * declarative, access-level navigation drawer whose entries are filtered by the
+ * current session, plus the Sign in / Sign out toggle and the Settings → Server
+ * switch. The signed-in role is re-validated against the backend on every resume
+ * (§4.3), so a server-side demotion drops menu access promptly.
  */
 @OptIn(ExperimentalMaterial3Api::class)
 @Composable
@@ -75,29 +103,62 @@ fun RunicApp(
     brand: BrandDto?,
     onChangeServer: () -> Unit,
     modifier: Modifier = Modifier,
+    deepLinkStream: String? = null,
+    onDeepLinkConsumed: () -> Unit = {},
+    sessionViewModel: SessionViewModel = hiltViewModel(),
 ) {
     val navController = rememberNavController()
     val drawerState = rememberDrawerState(DrawerValue.Closed)
     val scope = rememberCoroutineScope()
 
+    val session by sessionViewModel.session.collectAsStateWithLifecycle()
+
+    // Re-validate the cached role each time the app returns to the foreground (§4.3).
+    LifecycleResumeEffect(Unit) {
+        sessionViewModel.revalidate()
+        onPauseOrDispose { }
+    }
+
+    // A tapped push notification deep-links to its stream's screen (§11, item 7).
+    LaunchedEffect(deepLinkStream) {
+        val stream = deepLinkStream ?: return@LaunchedEffect
+        navController.navigate(Routes.forStream(stream)) {
+            popUpTo(Routes.HOME) { saveState = true }
+            launchSingleTop = true
+        }
+        onDeepLinkConsumed()
+    }
+
     val backStackEntry by navController.currentBackStackEntryAsState()
     val currentRoute = backStackEntry?.destination?.route
     val isTopLevel = currentRoute in TOP_LEVEL_ROUTES
+    val entries = visibleEntries(APP_MENU, session)
 
     ModalNavigationDrawer(
         drawerState = drawerState,
         gesturesEnabled = isTopLevel,
         drawerContent = {
-            ModalDrawerSheet {
+            ModalDrawerSheet(drawerContainerColor = MaterialTheme.colorScheme.surfaceVariant) {
+                val drawerItemColors = NavigationDrawerItemDefaults.colors(
+                    selectedContainerColor = MaterialTheme.colorScheme.secondaryContainer,
+                    selectedTextColor = MaterialTheme.colorScheme.onSecondaryContainer,
+                    unselectedTextColor = MaterialTheme.colorScheme.onSurface,
+                )
+                // Scroll the drawer: a signed-in session adds Account, Notifications, and
+                // the player groups, and the full list overflows a phone's drawer height —
+                // without this the lower entries (Notifications included) are clipped and
+                // unreachable. See RunicGateway M10.
+                Column(Modifier.verticalScroll(rememberScrollState())) {
                 Spacer(Modifier.height(12.dp))
                 Text(
                     text = brand?.name?.takeIf { it.isNotBlank() } ?: stringResource(R.string.app_name),
-                    style = androidx.compose.material3.MaterialTheme.typography.titleLarge,
+                    style = MaterialTheme.typography.titleLarge,
+                    color = MaterialTheme.colorScheme.onSurface,
                     modifier = Modifier.padding(horizontal = 24.dp, vertical = 12.dp),
                 )
                 HorizontalDivider()
                 Spacer(Modifier.height(8.dp))
-                PUBLIC_MENU.forEach { entry ->
+                entries.forEach { entry ->
                     NavigationDrawerItem(
                         label = { Text(stringResource(entry.labelRes)) },
                         selected = currentRoute == entry.route,
@@ -105,10 +166,34 @@ fun RunicApp(
                             scope.launch { drawerState.close() }
                             navController.navigateTopLevel(entry.route)
                         },
+                        colors = drawerItemColors,
                         modifier = Modifier.padding(NavigationDrawerItemDefaults.ItemPadding),
                     )
                 }
+
                 HorizontalDivider(Modifier.padding(vertical = 8.dp))
+
+                // Sign in / Sign out toggles on the session (§5).
+                val signInLabel = if (session is Session.SignedIn) {
+                    R.string.menu_sign_out
+                } else {
+                    R.string.menu_sign_in
+                }
+                NavigationDrawerItem(
+                    label = { Text(stringResource(signInLabel)) },
+                    selected = false,
+                    onClick = {
+                        scope.launch { drawerState.close() }
+                        if (session is Session.SignedIn) {
+                            sessionViewModel.signOut()
+                            navController.navigateTopLevel(Routes.HOME)
+                        } else {
+                            navController.navigate(Routes.LOGIN)
+                        }
+                    },
+                    colors = drawerItemColors,
+                    modifier = Modifier.padding(NavigationDrawerItemDefaults.ItemPadding),
+                )
                 NavigationDrawerItem(
                     label = { Text(stringResource(R.string.menu_change_server)) },
                     selected = false,
@@ -116,8 +201,10 @@ fun RunicApp(
                         scope.launch { drawerState.close() }
                         onChangeServer()
                     },
+                    colors = drawerItemColors,
                     modifier = Modifier.padding(NavigationDrawerItemDefaults.ItemPadding),
                 )
+                }
             }
         },
     ) {
@@ -125,10 +212,19 @@ fun RunicApp(
             modifier = modifier,
             topBar = {
                 TopAppBar(
+                    colors = TopAppBarDefaults.topAppBarColors(
+                        containerColor = MaterialTheme.colorScheme.surfaceVariant,
+                        titleContentColor = MaterialTheme.colorScheme.onSurface,
+                        navigationIconContentColor = MaterialTheme.colorScheme.onSurface,
+                        actionIconContentColor = MaterialTheme.colorScheme.onSurface,
+                    ),
                     title = {
                         Text(
-                            brand?.name?.takeIf { it.isNotBlank() }
-                                ?: stringResource(R.string.app_name),
+                            text = (brand?.name?.takeIf { it.isNotBlank() }
+                                ?: stringResource(R.string.app_name)).uppercase(),
+                            style = MaterialTheme.typography.titleSmall.copy(letterSpacing = 1.2.sp),
+                            maxLines = 1,
+                            overflow = TextOverflow.Ellipsis,
                         )
                     },
                     navigationIcon = {
@@ -151,6 +247,9 @@ fun RunicApp(
             RunicNavHost(
                 navController = navController,
                 brand = brand,
+                session = session,
+                onSignOut = { sessionViewModel.signOut() },
+                onSignOutEverywhere = { sessionViewModel.signOut(allDevices = true) },
                 modifier = Modifier.padding(innerPadding),
             )
         }
@@ -161,6 +260,9 @@ fun RunicApp(
 private fun RunicNavHost(
     navController: NavHostController,
     brand: BrandDto?,
+    session: Session,
+    onSignOut: () -> Unit,
+    onSignOutEverywhere: () -> Unit,
     modifier: Modifier = Modifier,
 ) {
     NavHost(
@@ -185,6 +287,22 @@ private fun RunicNavHost(
         ) {
             PostScreen()
         }
+        composable(Routes.SHARD) {
+            ShardScreen(onOpenBoard = { board ->
+                navController.navigate(
+                    when (board) {
+                        ShardBoard.CHAMPS -> Routes.SHARD_CHAMPS
+                        ShardBoard.GUILDS -> Routes.SHARD_GUILDS
+                        ShardBoard.GOVERNORS -> Routes.SHARD_GOVERNORS
+                        ShardBoard.HOUSES -> Routes.SHARD_HOUSES
+                    },
+                )
+            })
+        }
+        composable(Routes.SHARD_CHAMPS) { ChampsScreen() }
+        composable(Routes.SHARD_GUILDS) { GuildsScreen() }
+        composable(Routes.SHARD_GOVERNORS) { GovernorsScreen() }
+        composable(Routes.SHARD_HOUSES) { HousesScreen() }
         composable(Routes.WIKI) {
             WikiScreen(onOpenPage = { slug -> navController.navigate(Routes.wikiPage(slug)) })
         }
@@ -203,9 +321,132 @@ private fun RunicNavHost(
         composable(Routes.CONTACT) {
             ContactScreen()
         }
+        composable(Routes.LOGIN) {
+            // Leave the login screen as soon as the session is established — whether by
+            // password or the SSO bridge. Keying off the shared session (not just the
+            // login VM's local flag) makes this robust to the deep-link/recomposition
+            // timing of the Custom-Tab return, which the LoginScreen callback alone can miss.
+            if (session is Session.SignedIn) {
+                LaunchedEffect(Unit) { navController.popBackStack(Routes.LOGIN, inclusive = true) }
+            } else {
+                LoginScreen(onSignedIn = { navController.popBackStack() })
+            }
+        }
+        composable(Routes.ACCOUNT) {
+            // Only meaningful while signed in; a sign-out (here or from the drawer)
+            // sends the user home rather than leaving a stale identity on screen.
+            when (val s = session) {
+                is Session.SignedIn -> AccountScreen(
+                    username = s.user.username,
+                    roleLabel = stringResource(roleLabelRes(s.user.role)),
+                    onSignOut = onSignOut,
+                    onSignOutEverywhere = onSignOutEverywhere,
+                    onOpenTrustedDevices = { navController.navigate(Routes.ACCOUNT_TRUSTED_DEVICES) },
+                    onOpenRecoveryCodes = { navController.navigate(Routes.ACCOUNT_RECOVERY_CODES) },
+                )
+                Session.SignedOut -> LaunchedEffect(Unit) {
+                    navController.navigateTopLevel(Routes.HOME)
+                }
+            }
+        }
+        composable(Routes.ACCOUNT_TRUSTED_DEVICES) {
+            // Signed-in only; a drop (sign-out/demotion) sends the user home (§4.3).
+            when (session) {
+                is Session.SignedIn -> TrustedDevicesScreen()
+                Session.SignedOut -> LaunchedEffect(Unit) { navController.navigateTopLevel(Routes.HOME) }
+            }
+        }
+        composable(Routes.ACCOUNT_RECOVERY_CODES) {
+            when (session) {
+                is Session.SignedIn -> RecoveryCodesScreen()
+                Session.SignedOut -> LaunchedEffect(Unit) { navController.navigateTopLevel(Routes.HOME) }
+            }
+        }
+        composable(Routes.NOTIFICATIONS) {
+            // Signed-in only; a sign-out (or demotion) sends the user home rather than
+            // leaving stale settings up. The backend gates every call regardless (§5).
+            when (session) {
+                is Session.SignedIn -> NotificationsScreen()
+                Session.SignedOut -> LaunchedEffect(Unit) { navController.navigateTopLevel(Routes.HOME) }
+            }
+        }
+
+        // ── Player game data (§6.3) — reached from the player-only menu groups.
+        // The server enforces the player gate on every call; these screens simply
+        // render 401/403/503 as clean states (§7).
+        composable(Routes.PLAYER_CHARACTERS) {
+            PlayerGate(session, navController) {
+                CharactersScreen(onOpenChar = { serial -> navController.navigate(Routes.playerChar(serial)) })
+            }
+        }
+        composable(
+            route = Routes.PLAYER_CHAR,
+            arguments = listOf(navArgument(Routes.Args.SERIAL) { type = NavType.StringType }),
+        ) {
+            CharacterSheetScreen()
+        }
+        composable(Routes.PLAYER_VENDORS) {
+            PlayerGate(session, navController) { VendorsScreen() }
+        }
+        composable(Routes.PLAYER_HOUSES) {
+            PlayerGate(session, navController) { MyHousesScreen() }
+        }
+
+        // ── Staff operations (§1, §6.4, M10) — reached from the staff menu section.
+        // The backend re-checks role on every /admin/… call; these gates only mirror
+        // the menu's visibility so a signed-out/demoted user isn't left on a stale screen.
+        composable(Routes.ADMIN_DASHBOARD) {
+            StaffGate(session, navController) {
+                AdminDashboardScreen(isAdmin = (session as? Session.SignedIn)?.user?.isAdmin == true)
+            }
+        }
+        composable(Routes.ADMIN_CONTENT) {
+            StaffGate(session, navController) { AdminContentScreen() }
+        }
+        composable(Routes.ADMIN_MODERATION) {
+            StaffGate(session, navController, require = { it.isModerator }) { AdminModerationScreen() }
+        }
+        composable(Routes.ADMIN_SUPPORT) {
+            StaffGate(session, navController, require = { it.isModerator }) { AdminSupportScreen() }
+        }
     }
 }
 
+/**
+ * A UX guard for the player-only groups: while signed in, render [content]; if the
+ * session drops (sign-out, or a server-side demotion caught on resume, §4.3), send
+ * the user home instead of leaving a stale player screen up. The backend remains
+ * the authority — this only mirrors the menu's visibility rule.
+ */
+@Composable
+private fun PlayerGate(
+    session: Session,
+    navController: NavHostController,
+    content: @Composable () -> Unit,
+) {
+    when (session) {
+        is Session.SignedIn -> content()
+        Session.SignedOut -> LaunchedEffect(Unit) { navController.navigateTopLevel(Routes.HOME) }
+    }
+}
+
+/**
+ * The staff-operations analogue of [PlayerGate] (§1, M10): render [content] only for
+ * a signed-in staff account; a signed-out/demoted session (caught on resume, §4.3) is
+ * sent home rather than left on a stale admin screen. The backend is the authority —
+ * every `/admin/…` call re-checks role — so this only mirrors the menu's visibility.
+ */
+@Composable
+private fun StaffGate(
+    session: Session,
+    navController: NavHostController,
+    require: (com.runicgateway.app.core.auth.SessionUser) -> Boolean = { it.isStaff },
+    content: @Composable () -> Unit,
+) {
+    val ok = (session as? Session.SignedIn)?.user?.let(require) == true
+    if (ok) content() else LaunchedEffect(Unit) { navController.navigateTopLevel(Routes.HOME) }
+}
+
 /** Navigate to a top-level menu destination: single instance, reset to it. */
 private fun NavHostController.navigateTopLevel(route: String) {
     navigate(route) {

app/src/main/java/com/runicgateway/app/ui/admin/AdminContentScreen.kt

@@ -0,0 +1,291 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.ui.admin
+
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.Spacer
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.height
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.width
+import androidx.compose.foundation.lazy.LazyColumn
+import androidx.compose.foundation.lazy.items
+import androidx.compose.material3.AlertDialog
+import androidx.compose.material3.Card
+import androidx.compose.material3.FilterChip
+import androidx.compose.material3.HorizontalDivider
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.OutlinedButton
+import androidx.compose.material3.OutlinedTextField
+import androidx.compose.material3.Switch
+import androidx.compose.material3.Tab
+import androidx.compose.material3.TabRow
+import androidx.compose.material3.Text
+import androidx.compose.material3.TextButton
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableIntStateOf
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.saveable.rememberSaveable
+import androidx.compose.runtime.setValue
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.unit.dp
+import androidx.hilt.navigation.compose.hiltViewModel
+import androidx.lifecycle.compose.collectAsStateWithLifecycle
+import com.runicgateway.app.R
+import com.runicgateway.app.data.api.dto.AdminPostDto
+import com.runicgateway.app.data.api.dto.AdminWikiCategoryDto
+import com.runicgateway.app.data.api.dto.AdminWikiTagDto
+import com.runicgateway.app.ui.UiState
+import com.runicgateway.app.ui.components.ErrorView
+import com.runicgateway.app.ui.components.LoadingView
+import com.runicgateway.app.ui.components.PillTone
+import com.runicgateway.app.ui.components.StatusPill
+
+/**
+ * The staff content screen (PLAN.md §1, M10): news posts and wiki taxonomy, in two
+ * tabs. Create/publish/delete over the existing `/admin/posts` + `/admin/wiki/…`
+ * routes; the CMS block/hero editor stays out of scope. Any staff role; the server
+ * re-checks on every call.
+ */
+@Composable
+fun AdminContentScreen(
+    modifier: Modifier = Modifier,
+    viewModel: AdminContentViewModel = hiltViewModel(),
+) {
+    val state by viewModel.state.collectAsStateWithLifecycle()
+    var tab by rememberSaveable { mutableIntStateOf(0) }
+    var showNewPost by rememberSaveable { mutableStateOf(false) }
+    var showNewCategory by rememberSaveable { mutableStateOf(false) }
+
+    Column(modifier.fillMaxSize()) {
+        TabRow(selectedTabIndex = tab) {
+            Tab(selected = tab == 0, onClick = { tab = 0 }, text = { Text(stringResource(R.string.admin_content_tab_posts)) })
+            Tab(selected = tab == 1, onClick = { tab = 1 }, text = { Text(stringResource(R.string.admin_content_tab_wiki)) })
+        }
+
+        state.feedback?.let {
+            Text(
+                text = stringResource(it.messageRes),
+                style = MaterialTheme.typography.bodySmall,
+                color = if (it.ok) MaterialTheme.colorScheme.onSurfaceVariant else MaterialTheme.colorScheme.error,
+                modifier = Modifier.fillMaxWidth().padding(horizontal = 16.dp, vertical = 6.dp),
+            )
+        }
+
+        when (tab) {
+            0 -> PostsTab(
+                state = state.posts,
+                busy = state.busy,
+                onNew = { showNewPost = true },
+                onToggle = viewModel::togglePublish,
+                onDelete = viewModel::deletePost,
+                onRetry = viewModel::loadPosts,
+            )
+            else -> WikiTab(
+                state = state.categories,
+                tags = state.tags,
+                busy = state.busy,
+                onNew = { showNewCategory = true },
+                onDelete = viewModel::deleteCategory,
+                onRetry = viewModel::loadWiki,
+            )
+        }
+    }
+
+    if (showNewPost) {
+        NewPostDialog(
+            categories = viewModel.postCategories,
+            onDismiss = { showNewPost = false },
+            onCreate = { cat, title, excerpt, body, published ->
+                viewModel.createPost(cat, title, excerpt, body, published)
+                showNewPost = false
+            },
+        )
+    }
+    if (showNewCategory) {
+        NewCategoryDialog(
+            onDismiss = { showNewCategory = false },
+            onCreate = { slug, title, desc, sort ->
+                viewModel.createCategory(slug, title, desc, sort)
+                showNewCategory = false
+            },
+        )
+    }
+}
+
+@Composable
+private fun PostsTab(
+    state: UiState<List<AdminPostDto>>,
+    busy: Boolean,
+    onNew: () -> Unit,
+    onToggle: (AdminPostDto) -> Unit,
+    onDelete: (Long) -> Unit,
+    onRetry: () -> Unit,
+) {
+    when (state) {
+        is UiState.Loading -> LoadingView()
+        is UiState.Error -> ErrorView(state.kind, onRetry = onRetry)
+        is UiState.Success -> LazyColumn(Modifier.fillMaxSize().padding(16.dp)) {
+            item {
+                OutlinedButton(onClick = onNew, enabled = !busy, modifier = Modifier.fillMaxWidth().padding(bottom = 8.dp)) {
+                    Text(stringResource(R.string.admin_content_new_post))
+                }
+            }
+            items(state.data, key = { it.id }) { post ->
+                Card(Modifier.fillMaxWidth().padding(vertical = 6.dp)) {
+                    Column(Modifier.padding(12.dp)) {
+                        Text(post.title, style = MaterialTheme.typography.bodyLarge)
+                        Spacer(Modifier.height(4.dp))
+                        Row(verticalAlignment = Alignment.CenterVertically) {
+                            StatusPill(
+                                text = if (post.isPublished) stringResource(R.string.admin_content_published)
+                                else stringResource(R.string.admin_content_draft),
+                                tone = if (post.isPublished) PillTone.Success else PillTone.Neutral,
+                            )
+                            Spacer(Modifier.width(8.dp))
+                            Text(post.category, style = MaterialTheme.typography.bodySmall, color = MaterialTheme.colorScheme.onSurfaceVariant)
+                        }
+                        Row(Modifier.fillMaxWidth().padding(top = 8.dp), horizontalArrangement = Arrangement.End) {
+                            TextButton(onClick = { onToggle(post) }, enabled = !busy) {
+                                Text(
+                                    stringResource(
+                                        if (post.isPublished) R.string.admin_content_unpublish else R.string.admin_content_publish,
+                                    ),
+                                )
+                            }
+                            TextButton(onClick = { onDelete(post.id) }, enabled = !busy) {
+                                Text(stringResource(R.string.admin_content_delete), color = MaterialTheme.colorScheme.error)
+                            }
+                        }
+                    }
+                }
+            }
+        }
+    }
+}
+
+@Composable
+private fun WikiTab(
+    state: UiState<List<AdminWikiCategoryDto>>,
+    tags: List<AdminWikiTagDto>,
+    busy: Boolean,
+    onNew: () -> Unit,
+    onDelete: (Long) -> Unit,
+    onRetry: () -> Unit,
+) {
+    when (state) {
+        is UiState.Loading -> LoadingView()
+        is UiState.Error -> ErrorView(state.kind, onRetry = onRetry)
+        is UiState.Success -> LazyColumn(Modifier.fillMaxSize().padding(16.dp)) {
+            item {
+                OutlinedButton(onClick = onNew, enabled = !busy, modifier = Modifier.fillMaxWidth().padding(bottom = 8.dp)) {
+                    Text(stringResource(R.string.admin_content_new_category))
+                }
+            }
+            items(state.data, key = { it.id }) { cat ->
+                Card(Modifier.fillMaxWidth().padding(vertical = 6.dp)) {
+                    Column(Modifier.padding(12.dp)) {
+                        Text(cat.title, style = MaterialTheme.typography.bodyLarge)
+                        Text(
+                            text = stringResource(R.string.admin_content_cat_meta, cat.slug, cat.pageCount ?: 0),
+                            style = MaterialTheme.typography.bodySmall,
+                            color = MaterialTheme.colorScheme.onSurfaceVariant,
+                        )
+                        Row(Modifier.fillMaxWidth().padding(top = 8.dp), horizontalArrangement = Arrangement.End) {
+                            TextButton(onClick = { onDelete(cat.id) }, enabled = !busy) {
+                                Text(stringResource(R.string.admin_content_delete), color = MaterialTheme.colorScheme.error)
+                            }
+                        }
+                    }
+                }
+            }
+            if (tags.isNotEmpty()) {
+                item {
+                    HorizontalDivider(Modifier.padding(vertical = 12.dp))
+                    Text(
+                        stringResource(R.string.admin_content_tags, tags.joinToString(", ") { it.label }),
+                        style = MaterialTheme.typography.bodySmall,
+                        color = MaterialTheme.colorScheme.onSurfaceVariant,
+                    )
+                }
+            }
+        }
+    }
+}
+
+@Composable
+private fun NewPostDialog(
+    categories: List<String>,
+    onDismiss: () -> Unit,
+    onCreate: (category: String, title: String, excerpt: String, body: String, published: Boolean) -> Unit,
+) {
+    var category by rememberSaveable { mutableStateOf(categories.first()) }
+    var title by rememberSaveable { mutableStateOf("") }
+    var excerpt by rememberSaveable { mutableStateOf("") }
+    var body by rememberSaveable { mutableStateOf("") }
+    var published by rememberSaveable { mutableStateOf(false) }
+
+    AlertDialog(
+        onDismissRequest = onDismiss,
+        confirmButton = {
+            TextButton(onClick = { onCreate(category, title, excerpt, body, published) }) {
+                Text(stringResource(R.string.admin_content_create))
+            }
+        },
+        dismissButton = { TextButton(onClick = onDismiss) { Text(stringResource(R.string.action_cancel)) } },
+        title = { Text(stringResource(R.string.admin_content_new_post)) },
+        text = {
+            Column {
+                Row(horizontalArrangement = Arrangement.spacedBy(6.dp)) {
+                    categories.forEach { c ->
+                        FilterChip(selected = category == c, onClick = { category = c }, label = { Text(c) })
+                    }
+                }
+                OutlinedTextField(value = title, onValueChange = { title = it }, singleLine = true, label = { Text(stringResource(R.string.admin_content_field_title)) }, modifier = Modifier.fillMaxWidth().padding(top = 8.dp))
+                OutlinedTextField(value = excerpt, onValueChange = { excerpt = it }, label = { Text(stringResource(R.string.admin_content_field_excerpt)) }, modifier = Modifier.fillMaxWidth().padding(top = 8.dp))
+                OutlinedTextField(value = body, onValueChange = { body = it }, label = { Text(stringResource(R.string.admin_content_field_body)) }, modifier = Modifier.fillMaxWidth().padding(top = 8.dp))
+                Row(Modifier.fillMaxWidth().padding(top = 8.dp), verticalAlignment = Alignment.CenterVertically) {
+                    Text(stringResource(R.string.admin_content_publish_now), modifier = Modifier.weight(1f))
+                    Switch(checked = published, onCheckedChange = { published = it })
+                }
+            }
+        },
+    )
+}
+
+@Composable
+private fun NewCategoryDialog(
+    onDismiss: () -> Unit,
+    onCreate: (slug: String, title: String, description: String, sortOrder: Int?) -> Unit,
+) {
+    var slug by rememberSaveable { mutableStateOf("") }
+    var title by rememberSaveable { mutableStateOf("") }
+    var description by rememberSaveable { mutableStateOf("") }
+    var sort by rememberSaveable { mutableStateOf("") }
+
+    AlertDialog(
+        onDismissRequest = onDismiss,
+        confirmButton = {
+            TextButton(onClick = { onCreate(slug, title, description, sort.toIntOrNull()) }) {
+                Text(stringResource(R.string.admin_content_create))
+            }
+        },
+        dismissButton = { TextButton(onClick = onDismiss) { Text(stringResource(R.string.action_cancel)) } },
+        title = { Text(stringResource(R.string.admin_content_new_category)) },
+        text = {
+            Column {
+                OutlinedTextField(value = slug, onValueChange = { slug = it }, singleLine = true, label = { Text(stringResource(R.string.admin_content_field_slug)) }, modifier = Modifier.fillMaxWidth())
+                OutlinedTextField(value = title, onValueChange = { title = it }, singleLine = true, label = { Text(stringResource(R.string.admin_content_field_title)) }, modifier = Modifier.fillMaxWidth().padding(top = 8.dp))
+                OutlinedTextField(value = description, onValueChange = { description = it }, label = { Text(stringResource(R.string.admin_content_field_description)) }, modifier = Modifier.fillMaxWidth().padding(top = 8.dp))
+                OutlinedTextField(value = sort, onValueChange = { sort = it.filter(Char::isDigit) }, singleLine = true, label = { Text(stringResource(R.string.admin_content_field_sort)) }, modifier = Modifier.fillMaxWidth().padding(top = 8.dp))
+            }
+        },
+    )
+}

app/src/main/java/com/runicgateway/app/ui/admin/AdminContentViewModel.kt

@@ -0,0 +1,140 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.ui.admin
+
+import androidx.annotation.StringRes
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.viewModelScope
+import com.runicgateway.app.R
+import com.runicgateway.app.core.result.ApiResult
+import com.runicgateway.app.data.api.dto.AdminPostDto
+import com.runicgateway.app.data.api.dto.PostCreateRequest
+import com.runicgateway.app.data.api.dto.AdminWikiCategoryDto
+import com.runicgateway.app.data.api.dto.WikiCategoryRequest
+import com.runicgateway.app.data.api.dto.AdminWikiTagDto
+import com.runicgateway.app.data.repository.AdminRepository
+import com.runicgateway.app.ui.UiState
+import com.runicgateway.app.ui.toUiState
+import dagger.hilt.android.lifecycle.HiltViewModel
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.StateFlow
+import kotlinx.coroutines.flow.asStateFlow
+import kotlinx.coroutines.flow.update
+import kotlinx.coroutines.launch
+import javax.inject.Inject
+
+/**
+ * Drives the staff content screen (PLAN.md §1, M10): news posts (list, create,
+ * publish/unpublish, delete) and wiki taxonomy (list categories/tags, create/delete
+ * category). Any staff role reaches these (`staffOnly`); the full CMS block/hero
+ * editor stays out of scope. Reads go through the typed [AdminRepository] (§7).
+ */
+@HiltViewModel
+class AdminContentViewModel @Inject constructor(
+    private val admin: AdminRepository,
+) : ViewModel() {
+
+    /** The valid URL categories the backend maps (posts.model CATEGORY_MAP keys). */
+    val postCategories = listOf("news", "five-on-friday", "newsletter", "screenshots")
+
+    data class Feedback(val ok: Boolean, @param:StringRes val messageRes: Int)
+
+    data class State(
+        val posts: UiState<List<AdminPostDto>> = UiState.Loading,
+        val categories: UiState<List<AdminWikiCategoryDto>> = UiState.Loading,
+        val tags: List<AdminWikiTagDto> = emptyList(),
+        val busy: Boolean = false,
+        val feedback: Feedback? = null,
+    )
+
+    private val _state = MutableStateFlow(State())
+    val state: StateFlow<State> = _state.asStateFlow()
+
+    init {
+        loadPosts()
+        loadWiki()
+    }
+
+    fun clearFeedback() = _state.update { it.copy(feedback = null) }
+
+    fun loadPosts() {
+        _state.update { it.copy(posts = UiState.Loading) }
+        viewModelScope.launch { _state.update { it.copy(posts = admin.posts().toUiState()) } }
+    }
+
+    fun loadWiki() {
+        _state.update { it.copy(categories = UiState.Loading) }
+        viewModelScope.launch {
+            _state.update { it.copy(categories = admin.wikiCategories().toUiState()) }
+            when (val tags = admin.wikiTags()) {
+                is ApiResult.Ok -> _state.update { it.copy(tags = tags.data) }
+                else -> Unit // tags are secondary; leave the last list on a failure
+            }
+        }
+    }
+
+    fun togglePublish(post: AdminPostDto) = mutate(onSuccess = ::loadPosts) {
+        admin.setPostPublished(post.id, !post.isPublished).asFeedback(R.string.admin_content_post_updated)
+    }
+
+    fun deletePost(id: Long) = mutate(onSuccess = ::loadPosts) {
+        admin.deletePost(id).asFeedback(R.string.admin_content_post_deleted)
+    }
+
+    fun createPost(category: String, title: String, excerpt: String, body: String, published: Boolean) {
+        if (title.isBlank()) {
+            _state.update { it.copy(feedback = Feedback(false, R.string.admin_content_title_required)) }
+            return
+        }
+        mutate(onSuccess = ::loadPosts) {
+            admin.createPost(
+                PostCreateRequest(
+                    category = category,
+                    title = title.trim(),
+                    excerpt = excerpt.ifBlank { null },
+                    body = body.ifBlank { null },
+                    published = published,
+                ),
+            ).asFeedback(R.string.admin_content_post_created)
+        }
+    }
+
+    fun createCategory(slug: String, title: String, description: String, sortOrder: Int?) {
+        if (slug.isBlank() || title.isBlank()) {
+            _state.update { it.copy(feedback = Feedback(false, R.string.admin_content_cat_fields_required)) }
+            return
+        }
+        mutate(onSuccess = ::loadWiki) {
+            admin.createWikiCategory(
+                WikiCategoryRequest(slug.trim(), title.trim(), description.ifBlank { null }, sortOrder),
+            ).asFeedback(R.string.admin_content_cat_created)
+        }
+    }
+
+    fun deleteCategory(id: Long) = mutate(onSuccess = ::loadWiki) {
+        admin.deleteWikiCategory(id).asFeedback(R.string.admin_content_cat_deleted)
+    }
+
+    // ── Shared mutation plumbing ──────────────────────────────────────────
+
+    /** Run a write: set busy + clear feedback, then on completion set the feedback
+     *  banner and, only if it succeeded, run [onSuccess] (a targeted reload). */
+    private fun mutate(onSuccess: () -> Unit = {}, block: suspend () -> Feedback) {
+        if (_state.value.busy) return
+        _state.update { it.copy(busy = true, feedback = null) }
+        viewModelScope.launch {
+            val feedback = block()
+            if (feedback.ok) onSuccess()
+            _state.update { it.copy(busy = false, feedback = feedback) }
+        }
+    }
+
+    /** Map an [ApiResult] to a [Feedback], with role/permission-aware failure copy. */
+    private fun ApiResult<*>.asFeedback(@StringRes okRes: Int): Feedback = when (this) {
+        is ApiResult.Ok -> Feedback(true, okRes)
+        is ApiResult.HttpError ->
+            Feedback(false, if (status == 403) R.string.admin_forbidden else R.string.admin_action_failed)
+        is ApiResult.NetworkError -> Feedback(false, R.string.error_network)
+    }
+}

app/src/main/java/com/runicgateway/app/ui/admin/AdminDashboardScreen.kt

@@ -0,0 +1,169 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.ui.admin
+
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.Spacer
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.height
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.width
+import androidx.compose.foundation.rememberScrollState
+import androidx.compose.foundation.verticalScroll
+import androidx.compose.material3.Button
+import androidx.compose.material3.CircularProgressIndicator
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.getValue
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.unit.dp
+import androidx.hilt.navigation.compose.hiltViewModel
+import androidx.lifecycle.compose.collectAsStateWithLifecycle
+import com.runicgateway.app.R
+import com.runicgateway.app.data.api.dto.AdminDashboardDto
+import com.runicgateway.app.ui.UiState
+import com.runicgateway.app.ui.components.ErrorView
+import com.runicgateway.app.ui.components.LoadingView
+import com.runicgateway.app.ui.components.PillTone
+import com.runicgateway.app.ui.components.SectionLabel
+import com.runicgateway.app.ui.components.StatusPill
+
+/**
+ * The staff dashboard (PLAN.md §1, M10): site mode + a site-mode toggle (admins
+ * only), summary counts, and recent admin activity. Read-only for moderators/editors;
+ * only [isAdmin] callers see the maintenance switch, and the server enforces it too.
+ */
+@Composable
+fun AdminDashboardScreen(
+    isAdmin: Boolean,
+    modifier: Modifier = Modifier,
+    viewModel: AdminDashboardViewModel = hiltViewModel(),
+) {
+    val state by viewModel.state.collectAsStateWithLifecycle()
+
+    when (val ds = state.dashboard) {
+        is UiState.Loading -> LoadingView(modifier)
+        is UiState.Error -> ErrorView(ds.kind, onRetry = viewModel::load, modifier = modifier)
+        is UiState.Success -> DashboardContent(
+            data = ds.data,
+            isAdmin = isAdmin,
+            switching = state.switching,
+            feedbackRes = state.feedback?.messageRes,
+            onSetMode = viewModel::setSiteMode,
+            modifier = modifier,
+        )
+    }
+}
+
+@Composable
+private fun DashboardContent(
+    data: AdminDashboardDto,
+    isAdmin: Boolean,
+    switching: Boolean,
+    feedbackRes: Int?,
+    onSetMode: (String) -> Unit,
+    modifier: Modifier = Modifier,
+) {
+    val live = data.siteMode.equals("live", ignoreCase = true)
+    Column(
+        modifier = modifier
+            .fillMaxSize()
+            .verticalScroll(rememberScrollState())
+            .padding(20.dp),
+    ) {
+        // ── Site status ──────────────────────────────────────────────
+        SectionLabel(stringResource(R.string.admin_dashboard_site))
+        Spacer(Modifier.height(8.dp))
+        Row(verticalAlignment = Alignment.CenterVertically) {
+            StatusPill(
+                text = if (live) stringResource(R.string.admin_site_live) else stringResource(R.string.admin_site_maintenance),
+                tone = if (live) PillTone.Success else PillTone.Warning,
+            )
+            data.lastChange.by?.takeIf { it.isNotBlank() }?.let { by ->
+                Spacer(Modifier.width(12.dp))
+                Text(
+                    text = stringResource(R.string.admin_site_changed_by, by),
+                    style = MaterialTheme.typography.bodySmall,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                )
+            }
+        }
+
+        if (isAdmin) {
+            Spacer(Modifier.height(12.dp))
+            Button(
+                onClick = { onSetMode(if (live) "maintenance" else "live") },
+                enabled = !switching,
+                modifier = Modifier.fillMaxWidth(),
+            ) {
+                if (switching) {
+                    CircularProgressIndicator(strokeWidth = 2.dp, modifier = Modifier.height(20.dp))
+                } else {
+                    Text(
+                        stringResource(
+                            if (live) R.string.admin_site_switch_maintenance else R.string.admin_site_switch_live,
+                        ),
+                    )
+                }
+            }
+        }
+
+        feedbackRes?.let {
+            Spacer(Modifier.height(8.dp))
+            Text(
+                text = stringResource(it),
+                style = MaterialTheme.typography.bodySmall,
+                color = MaterialTheme.colorScheme.onSurfaceVariant,
+            )
+        }
+
+        // ── Counts ───────────────────────────────────────────────────
+        Spacer(Modifier.height(24.dp))
+        SectionLabel(stringResource(R.string.admin_dashboard_counts))
+        Spacer(Modifier.height(8.dp))
+        StatRow(stringResource(R.string.admin_count_users), data.counts.users.toString())
+        val totalPosts = data.counts.posts.values.sum()
+        StatRow(stringResource(R.string.admin_count_posts), totalPosts.toString())
+        data.counts.posts.forEach { (category, count) ->
+            StatRow("· $category", count.toString())
+        }
+
+        // ── Recent activity ──────────────────────────────────────────
+        if (data.recentActivity.isNotEmpty()) {
+            Spacer(Modifier.height(24.dp))
+            SectionLabel(stringResource(R.string.admin_dashboard_recent_activity))
+            Spacer(Modifier.height(8.dp))
+            data.recentActivity.forEach { row ->
+                Column(Modifier.fillMaxWidth().padding(vertical = 6.dp)) {
+                    Text(row.action, style = MaterialTheme.typography.bodyMedium)
+                    val meta = listOfNotNull(row.username, row.createdAt).joinToString(" · ")
+                    if (meta.isNotBlank()) {
+                        Text(
+                            text = meta,
+                            style = MaterialTheme.typography.bodySmall,
+                            color = MaterialTheme.colorScheme.onSurfaceVariant,
+                        )
+                    }
+                }
+            }
+        }
+    }
+}
+
+@Composable
+private fun StatRow(label: String, value: String) {
+    Row(
+        modifier = Modifier.fillMaxWidth().padding(vertical = 4.dp),
+        horizontalArrangement = Arrangement.SpaceBetween,
+    ) {
+        Text(label, style = MaterialTheme.typography.bodyMedium)
+        Text(value, style = MaterialTheme.typography.bodyMedium, color = MaterialTheme.colorScheme.onSurfaceVariant)
+    }
+}

app/src/main/java/com/runicgateway/app/ui/admin/AdminDashboardViewModel.kt

@@ -0,0 +1,91 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.ui.admin
+
+import androidx.annotation.StringRes
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.viewModelScope
+import com.runicgateway.app.R
+import com.runicgateway.app.core.result.ApiResult
+import com.runicgateway.app.data.api.dto.AdminDashboardDto
+import com.runicgateway.app.data.repository.AdminRepository
+import com.runicgateway.app.ui.UiState
+import com.runicgateway.app.ui.toUiState
+import dagger.hilt.android.lifecycle.HiltViewModel
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.StateFlow
+import kotlinx.coroutines.flow.asStateFlow
+import kotlinx.coroutines.flow.update
+import kotlinx.coroutines.launch
+import javax.inject.Inject
+
+/**
+ * Drives the staff dashboard (PLAN.md §1, M10): summary counts + the site-mode
+ * toggle. The mode switch is admin-only server-side (`adminOnly`); the screen only
+ * offers it to admins, but a `403` is still handled cleanly if a moderator reaches
+ * it. Everything is read through the typed [AdminRepository] (§7).
+ */
+@HiltViewModel
+class AdminDashboardViewModel @Inject constructor(
+    private val admin: AdminRepository,
+) : ViewModel() {
+
+    data class Feedback(val ok: Boolean, @param:StringRes val messageRes: Int)
+
+    data class State(
+        val dashboard: UiState<AdminDashboardDto> = UiState.Loading,
+        /** True while a site-mode switch is in flight (disables the control). */
+        val switching: Boolean = false,
+        val feedback: Feedback? = null,
+    )
+
+    private val _state = MutableStateFlow(State())
+    val state: StateFlow<State> = _state.asStateFlow()
+
+    init {
+        load()
+    }
+
+    fun load() {
+        _state.update { it.copy(dashboard = UiState.Loading) }
+        viewModelScope.launch {
+            _state.update { it.copy(dashboard = admin.dashboard().toUiState()) }
+        }
+    }
+
+    fun clearFeedback() = _state.update { it.copy(feedback = null) }
+
+    /** Switch the site between "live" and "maintenance" (admin only). */
+    fun setSiteMode(mode: String) {
+        if (_state.value.switching) return
+        _state.update { it.copy(switching = true, feedback = null) }
+        viewModelScope.launch {
+            when (val result = admin.setSiteMode(mode)) {
+                is ApiResult.Ok -> {
+                    // Reflect the new mode locally, then refresh the full summary.
+                    val current = _state.value.dashboard
+                    if (current is UiState.Success) {
+                        _state.update {
+                            it.copy(dashboard = UiState.Success(current.data.copy(siteMode = result.data.siteMode)))
+                        }
+                    }
+                    _state.update { it.copy(switching = false, feedback = Feedback(true, R.string.admin_site_mode_updated)) }
+                    load()
+                }
+                is ApiResult.HttpError ->
+                    _state.update {
+                        it.copy(
+                            switching = false,
+                            feedback = Feedback(
+                                false,
+                                if (result.status == 403) R.string.admin_forbidden else R.string.admin_action_failed,
+                            ),
+                        )
+                    }
+                is ApiResult.NetworkError ->
+                    _state.update { it.copy(switching = false, feedback = Feedback(false, R.string.error_network)) }
+            }
+        }
+    }
+}

app/src/main/java/com/runicgateway/app/ui/admin/AdminModerationScreen.kt

@@ -0,0 +1,92 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.ui.admin
+
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.Spacer
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.height
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.rememberScrollState
+import androidx.compose.foundation.verticalScroll
+import androidx.compose.material3.Button
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.OutlinedButton
+import androidx.compose.material3.OutlinedTextField
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.saveable.rememberSaveable
+import androidx.compose.runtime.setValue
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.unit.dp
+import androidx.hilt.navigation.compose.hiltViewModel
+import androidx.lifecycle.compose.collectAsStateWithLifecycle
+import com.runicgateway.app.R
+import com.runicgateway.app.ui.components.SectionLabel
+
+/**
+ * The moderation screen (PLAN.md §1, M10): kick / ban / unban an account and
+ * broadcast, over `/admin/shard/…` (admin/moderator). A live sidecar is required;
+ * offline, actions return a clean "shard offline" message. Fields are entered here;
+ * the [AdminModerationViewModel] performs the guarded action.
+ */
+@Composable
+fun AdminModerationScreen(
+    modifier: Modifier = Modifier,
+    viewModel: AdminModerationViewModel = hiltViewModel(),
+) {
+    val state by viewModel.state.collectAsStateWithLifecycle()
+    var account by rememberSaveable { mutableStateOf("") }
+    var serial by rememberSaveable { mutableStateOf("") }
+    var reason by rememberSaveable { mutableStateOf("") }
+    var duration by rememberSaveable { mutableStateOf("") }
+    var broadcast by rememberSaveable { mutableStateOf("") }
+    val busy = state.busy
+
+    Column(
+        modifier = modifier.fillMaxSize().verticalScroll(rememberScrollState()).padding(20.dp),
+    ) {
+        state.feedback?.let {
+            Text(
+                text = stringResource(it.messageRes),
+                style = MaterialTheme.typography.bodySmall,
+                color = if (it.ok) MaterialTheme.colorScheme.onSurfaceVariant else MaterialTheme.colorScheme.error,
+                modifier = Modifier.fillMaxWidth().padding(bottom = 8.dp),
+            )
+        }
+
+        // ── Account actions ──────────────────────────────────────────────
+        SectionLabel(stringResource(R.string.admin_mod_account_action))
+        OutlinedTextField(value = account, onValueChange = { account = it }, singleLine = true, label = { Text(stringResource(R.string.admin_mod_account)) }, modifier = Modifier.fillMaxWidth().padding(top = 8.dp))
+        OutlinedTextField(value = serial, onValueChange = { serial = it }, singleLine = true, label = { Text(stringResource(R.string.admin_mod_serial)) }, modifier = Modifier.fillMaxWidth().padding(top = 8.dp))
+        OutlinedTextField(value = reason, onValueChange = { reason = it }, label = { Text(stringResource(R.string.admin_mod_reason)) }, modifier = Modifier.fillMaxWidth().padding(top = 8.dp))
+        OutlinedTextField(value = duration, onValueChange = { duration = it.filter(Char::isDigit) }, singleLine = true, label = { Text(stringResource(R.string.admin_mod_duration)) }, modifier = Modifier.fillMaxWidth().padding(top = 8.dp))
+
+        Row(Modifier.fillMaxWidth().padding(top = 12.dp), horizontalArrangement = Arrangement.spacedBy(8.dp)) {
+            OutlinedButton(onClick = { viewModel.kick(account, serial) }, enabled = !busy, modifier = Modifier.weight(1f)) {
+                Text(stringResource(R.string.admin_mod_kick))
+            }
+            Button(onClick = { viewModel.ban(account, serial, duration.toLongOrNull(), reason) }, enabled = !busy, modifier = Modifier.weight(1f)) {
+                Text(stringResource(R.string.admin_mod_ban))
+            }
+            OutlinedButton(onClick = { viewModel.unban(account) }, enabled = !busy, modifier = Modifier.weight(1f)) {
+                Text(stringResource(R.string.admin_mod_unban))
+            }
+        }
+
+        // ── Broadcast ────────────────────────────────────────────────────
+        Spacer(Modifier.height(24.dp))
+        SectionLabel(stringResource(R.string.admin_mod_broadcast_section))
+        OutlinedTextField(value = broadcast, onValueChange = { broadcast = it }, label = { Text(stringResource(R.string.admin_mod_broadcast_text)) }, modifier = Modifier.fillMaxWidth().padding(top = 8.dp))
+        Button(onClick = { viewModel.broadcast(broadcast, null) }, enabled = !busy, modifier = Modifier.fillMaxWidth().padding(top = 12.dp)) {
+            Text(stringResource(R.string.admin_mod_broadcast))
+        }
+    }
+}

app/src/main/java/com/runicgateway/app/ui/admin/AdminModerationViewModel.kt

@@ -0,0 +1,89 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.ui.admin
+
+import androidx.annotation.StringRes
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.viewModelScope
+import com.runicgateway.app.R
+import com.runicgateway.app.core.result.ApiResult
+import com.runicgateway.app.data.repository.AdminRepository
+import dagger.hilt.android.lifecycle.HiltViewModel
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.StateFlow
+import kotlinx.coroutines.flow.asStateFlow
+import kotlinx.coroutines.flow.update
+import kotlinx.coroutines.launch
+import javax.inject.Inject
+
+/**
+ * Drives the moderation actions (PLAN.md §1, M10): kick / ban / unban an account
+ * and broadcast a system message, over the shard write plane (`/admin/shard/…`,
+ * admin/moderator). These need a live sidecar — when the shard is offline the call
+ * fails and the screen shows a clean error, never a crash (§7). The form fields live
+ * in the screen; this VM owns only the busy + feedback state and the actions.
+ */
+@HiltViewModel
+class AdminModerationViewModel @Inject constructor(
+    private val admin: AdminRepository,
+) : ViewModel() {
+
+    data class Feedback(val ok: Boolean, @param:StringRes val messageRes: Int)
+
+    data class State(val busy: Boolean = false, val feedback: Feedback? = null)
+
+    private val _state = MutableStateFlow(State())
+    val state: StateFlow<State> = _state.asStateFlow()
+
+    fun clearFeedback() = _state.update { it.copy(feedback = null) }
+
+    fun kick(account: String, serial: String) {
+        if (account.isBlank() && serial.isBlank()) return badTarget()
+        run(R.string.admin_mod_kicked) { admin.kick(account.ifBlank { null }, serial.ifBlank { null }) }
+    }
+
+    fun ban(account: String, serial: String, durationSec: Long?, reason: String) {
+        if (account.isBlank() && serial.isBlank()) return badTarget()
+        run(R.string.admin_mod_banned) {
+            admin.ban(account.ifBlank { null }, serial.ifBlank { null }, durationSec, reason.ifBlank { null })
+        }
+    }
+
+    fun unban(account: String) {
+        if (account.isBlank()) return badTarget()
+        run(R.string.admin_mod_unbanned) { admin.unban(account.trim()) }
+    }
+
+    fun broadcast(text: String, hue: Int?) {
+        if (text.isBlank()) {
+            _state.update { it.copy(feedback = Feedback(false, R.string.admin_mod_text_required)) }
+            return
+        }
+        run(R.string.admin_mod_broadcasted) { admin.broadcast(text.trim(), hue) }
+    }
+
+    private fun badTarget() {
+        _state.update { it.copy(feedback = Feedback(false, R.string.admin_mod_target_required)) }
+    }
+
+    private fun run(@StringRes okRes: Int, block: suspend () -> ApiResult<Unit>) {
+        if (_state.value.busy) return
+        _state.update { it.copy(busy = true, feedback = null) }
+        viewModelScope.launch {
+            val feedback = when (val r = block()) {
+                is ApiResult.Ok -> Feedback(true, okRes)
+                is ApiResult.HttpError -> Feedback(
+                    false,
+                    when (r.status) {
+                        403 -> R.string.admin_forbidden
+                        503 -> R.string.admin_mod_shard_offline
+                        else -> R.string.admin_action_failed
+                    },
+                )
+                is ApiResult.NetworkError -> Feedback(false, R.string.error_network)
+            }
+            _state.update { it.copy(busy = false, feedback = feedback) }
+        }
+    }
+}

app/src/main/java/com/runicgateway/app/ui/admin/AdminSupportScreen.kt

@@ -0,0 +1,145 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.ui.admin
+
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.Spacer
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.height
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.lazy.LazyColumn
+import androidx.compose.foundation.lazy.items
+import androidx.compose.material3.AlertDialog
+import androidx.compose.material3.Card
+import androidx.compose.material3.Checkbox
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.OutlinedTextField
+import androidx.compose.material3.Text
+import androidx.compose.material3.TextButton
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.saveable.rememberSaveable
+import androidx.compose.runtime.setValue
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.unit.dp
+import androidx.hilt.navigation.compose.hiltViewModel
+import androidx.lifecycle.compose.collectAsStateWithLifecycle
+import com.runicgateway.app.R
+import com.runicgateway.app.data.api.dto.SupportPageDto
+import com.runicgateway.app.ui.UiState
+import com.runicgateway.app.ui.components.EmptyView
+import com.runicgateway.app.ui.components.ErrorView
+import com.runicgateway.app.ui.components.LoadingView
+
+/**
+ * The support (help-page) queue (PLAN.md §1, M10): open tickets with reply/close,
+ * over `/admin/shard/pages…` (admin/moderator). Empty when there are no open pages
+ * (or the shard is offline); every read/write degrades cleanly (§7).
+ */
+@Composable
+fun AdminSupportScreen(
+    modifier: Modifier = Modifier,
+    viewModel: AdminSupportViewModel = hiltViewModel(),
+) {
+    val state by viewModel.state.collectAsStateWithLifecycle()
+    var replyTo by remember { mutableStateOf<SupportPageDto?>(null) }
+
+    Column(modifier.fillMaxSize()) {
+        state.feedback?.let {
+            Text(
+                text = stringResource(it.messageRes),
+                style = MaterialTheme.typography.bodySmall,
+                color = if (it.ok) MaterialTheme.colorScheme.onSurfaceVariant else MaterialTheme.colorScheme.error,
+                modifier = Modifier.fillMaxWidth().padding(horizontal = 16.dp, vertical = 6.dp),
+            )
+        }
+        when (val s = state.pages) {
+            is UiState.Loading -> LoadingView()
+            is UiState.Error -> ErrorView(s.kind, onRetry = viewModel::load)
+            is UiState.Success ->
+                if (s.data.isEmpty()) {
+                    EmptyView(stringResource(R.string.admin_support_empty))
+                } else {
+                    LazyColumn(Modifier.fillMaxSize().padding(16.dp)) {
+                        items(s.data, key = { it.pageId }) { page ->
+                            SupportPageCard(
+                                page = page,
+                                busy = state.busy,
+                                onReply = { replyTo = page },
+                                onClose = { viewModel.close(page.pageId) },
+                            )
+                        }
+                    }
+                }
+        }
+    }
+
+    replyTo?.let { page ->
+        RespondDialog(
+            onDismiss = { replyTo = null },
+            onSend = { message, close ->
+                viewModel.respond(page.pageId, message, close)
+                replyTo = null
+            },
+        )
+    }
+}
+
+@Composable
+private fun SupportPageCard(
+    page: SupportPageDto,
+    busy: Boolean,
+    onReply: () -> Unit,
+    onClose: () -> Unit,
+) {
+    Card(Modifier.fillMaxWidth().padding(vertical = 6.dp)) {
+        Column(Modifier.padding(12.dp)) {
+            val who = page.sender?.name ?: page.sender?.account ?: page.pageId
+            Text(
+                text = listOfNotNull(page.type, who).joinToString(" · "),
+                style = MaterialTheme.typography.bodyLarge,
+            )
+            page.message?.takeIf { it.isNotBlank() }?.let {
+                Spacer(Modifier.height(4.dp))
+                Text(it, style = MaterialTheme.typography.bodyMedium, color = MaterialTheme.colorScheme.onSurfaceVariant)
+            }
+            Row(Modifier.fillMaxWidth().padding(top = 8.dp), horizontalArrangement = Arrangement.End) {
+                TextButton(onClick = onReply, enabled = !busy) { Text(stringResource(R.string.admin_support_reply)) }
+                TextButton(onClick = onClose, enabled = !busy) { Text(stringResource(R.string.admin_support_close)) }
+            }
+        }
+    }
+}
+
+@Composable
+private fun RespondDialog(
+    onDismiss: () -> Unit,
+    onSend: (message: String, close: Boolean) -> Unit,
+) {
+    var message by rememberSaveable { mutableStateOf("") }
+    var alsoClose by rememberSaveable { mutableStateOf(true) }
+
+    AlertDialog(
+        onDismissRequest = onDismiss,
+        confirmButton = { TextButton(onClick = { onSend(message, alsoClose) }) { Text(stringResource(R.string.admin_support_send)) } },
+        dismissButton = { TextButton(onClick = onDismiss) { Text(stringResource(R.string.action_cancel)) } },
+        title = { Text(stringResource(R.string.admin_support_reply)) },
+        text = {
+            Column {
+                OutlinedTextField(value = message, onValueChange = { message = it }, label = { Text(stringResource(R.string.admin_support_message)) }, modifier = Modifier.fillMaxWidth())
+                Row(Modifier.fillMaxWidth().padding(top = 8.dp), verticalAlignment = Alignment.CenterVertically) {
+                    Checkbox(checked = alsoClose, onCheckedChange = { alsoClose = it })
+                    Text(stringResource(R.string.admin_support_close_after))
+                }
+            }
+        },
+    )
+}

app/src/main/java/com/runicgateway/app/ui/admin/AdminSupportViewModel.kt

@@ -0,0 +1,87 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.ui.admin
+
+import androidx.annotation.StringRes
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.viewModelScope
+import com.runicgateway.app.R
+import com.runicgateway.app.core.result.ApiResult
+import com.runicgateway.app.data.api.dto.SupportPageDto
+import com.runicgateway.app.data.repository.AdminRepository
+import com.runicgateway.app.ui.UiState
+import com.runicgateway.app.ui.toUiState
+import dagger.hilt.android.lifecycle.HiltViewModel
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.StateFlow
+import kotlinx.coroutines.flow.asStateFlow
+import kotlinx.coroutines.flow.update
+import kotlinx.coroutines.launch
+import javax.inject.Inject
+
+/**
+ * Drives the support (help-page) queue (PLAN.md §1, M10): list open pages, reply
+ * (optionally closing), and close, over `/admin/shard/pages…` (admin/moderator).
+ * The list is served from shard state — empty when no tickets (or the shard is
+ * offline); writes need a live sidecar and fail cleanly otherwise (§7).
+ */
+@HiltViewModel
+class AdminSupportViewModel @Inject constructor(
+    private val admin: AdminRepository,
+) : ViewModel() {
+
+    data class Feedback(val ok: Boolean, @param:StringRes val messageRes: Int)
+
+    data class State(
+        val pages: UiState<List<SupportPageDto>> = UiState.Loading,
+        val busy: Boolean = false,
+        val feedback: Feedback? = null,
+    )
+
+    private val _state = MutableStateFlow(State())
+    val state: StateFlow<State> = _state.asStateFlow()
+
+    init {
+        load()
+    }
+
+    fun clearFeedback() = _state.update { it.copy(feedback = null) }
+
+    fun load() {
+        _state.update { it.copy(pages = UiState.Loading) }
+        viewModelScope.launch { _state.update { it.copy(pages = admin.supportPages().toUiState()) } }
+    }
+
+    fun respond(id: String, message: String, close: Boolean) {
+        if (message.isBlank()) {
+            _state.update { it.copy(feedback = Feedback(false, R.string.admin_support_message_required)) }
+            return
+        }
+        mutate(R.string.admin_support_responded) { admin.respondPage(id, message.trim(), close) }
+    }
+
+    fun close(id: String) = mutate(R.string.admin_support_closed) { admin.closePage(id) }
+
+    private fun mutate(@StringRes okRes: Int, block: suspend () -> ApiResult<Unit>) {
+        if (_state.value.busy) return
+        _state.update { it.copy(busy = true, feedback = null) }
+        viewModelScope.launch {
+            val feedback = when (val r = block()) {
+                is ApiResult.Ok -> Feedback(true, okRes)
+                is ApiResult.HttpError -> Feedback(
+                    false,
+                    when (r.status) {
+                        403 -> R.string.admin_forbidden
+                        404 -> R.string.admin_support_unknown_page
+                        503 -> R.string.admin_mod_shard_offline
+                        else -> R.string.admin_action_failed
+                    },
+                )
+                is ApiResult.NetworkError -> Feedback(false, R.string.error_network)
+            }
+            if (feedback.ok) load()
+            _state.update { it.copy(busy = false, feedback = feedback) }
+        }
+    }
+}

app/src/main/java/com/runicgateway/app/ui/auth/AccountScreen.kt

@@ -0,0 +1,390 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.ui.auth
+
+import android.graphics.BitmapFactory
+import android.util.Base64
+import androidx.annotation.StringRes
+import androidx.compose.foundation.Image
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.size
+import androidx.compose.foundation.rememberScrollState
+import androidx.compose.foundation.verticalScroll
+import androidx.compose.material3.Button
+import androidx.compose.material3.Card
+import androidx.compose.material3.HorizontalDivider
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.OutlinedButton
+import androidx.compose.material3.OutlinedTextField
+import androidx.compose.material3.Text
+import androidx.compose.material3.TextButton
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.saveable.rememberSaveable
+import androidx.compose.runtime.setValue
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.graphics.asImageBitmap
+import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.text.input.KeyboardType
+import androidx.compose.ui.text.input.PasswordVisualTransformation
+import androidx.compose.ui.unit.dp
+import androidx.compose.foundation.text.KeyboardOptions
+import androidx.compose.ui.graphics.ImageBitmap
+import androidx.hilt.navigation.compose.hiltViewModel
+import androidx.lifecycle.compose.collectAsStateWithLifecycle
+import com.runicgateway.app.R
+import com.runicgateway.app.core.auth.Role
+import com.runicgateway.app.data.api.dto.LinkedIdentityDto
+import com.runicgateway.app.data.api.dto.PlayerAccountDto
+import com.runicgateway.app.ui.UiState
+import com.runicgateway.app.ui.auth.AccountViewModel.Feedback
+import com.runicgateway.app.ui.auth.AccountViewModel.Section
+import com.runicgateway.app.ui.components.ErrorView
+import com.runicgateway.app.ui.components.LoadingView
+import com.runicgateway.app.ui.components.PillTone
+import com.runicgateway.app.ui.components.StatusPill
+
+/**
+ * The signed-in account surface (PLAN.md §5, §6.3): identity + role, self-service
+ * over `/auth/me/account*` (change username/password, TOTP, linked identities),
+ * and the sign-out controls. Credential-provisioning flows (register / reset / SSO
+ * link) stay website hand-offs (§4.2) and are not rebuilt here.
+ */
+@Composable
+fun AccountScreen(
+    username: String,
+    roleLabel: String,
+    onSignOut: () -> Unit,
+    onSignOutEverywhere: () -> Unit,
+    onOpenTrustedDevices: () -> Unit,
+    onOpenRecoveryCodes: () -> Unit,
+    modifier: Modifier = Modifier,
+    viewModel: AccountViewModel = hiltViewModel(),
+) {
+    val state by viewModel.state.collectAsStateWithLifecycle()
+
+    Column(
+        modifier = modifier
+            .fillMaxSize()
+            .verticalScroll(rememberScrollState())
+            .padding(16.dp),
+    ) {
+        IdentityCard(username = username, roleLabel = roleLabel)
+
+        // One-time recovery codes surfaced right after enabling 2FA — save them now.
+        state.recoveryCodesOnce?.let { codes ->
+            RecoveryCodesShowOnceCard(codes, onDismiss = viewModel::dismissRecoveryCodes)
+        }
+
+        when (val account = state.account) {
+            is UiState.Loading -> LoadingView(Modifier.padding(top = 32.dp))
+            is UiState.Error -> ErrorView(account.kind, onRetry = viewModel::load, modifier = Modifier.padding(top = 32.dp))
+            is UiState.Success -> AccountSections(account.data, state, viewModel, onOpenTrustedDevices, onOpenRecoveryCodes)
+        }
+
+        HorizontalDivider(Modifier.padding(vertical = 20.dp))
+
+        OutlinedButton(onClick = onSignOut, modifier = Modifier.fillMaxWidth()) {
+            Text(stringResource(R.string.account_sign_out))
+        }
+        TextButton(
+            onClick = onSignOutEverywhere,
+            modifier = Modifier.fillMaxWidth().padding(top = 4.dp),
+        ) {
+            Text(stringResource(R.string.account_sign_out_all))
+        }
+    }
+}
+
+@Composable
+private fun IdentityCard(username: String, roleLabel: String) {
+    Card(Modifier.fillMaxWidth()) {
+        Column(Modifier.padding(20.dp)) {
+            Text(text = username, style = MaterialTheme.typography.titleLarge)
+            StatusPill(
+                text = roleLabel,
+                tone = PillTone.Info,
+                modifier = Modifier.padding(top = 8.dp),
+            )
+        }
+    }
+}
+
+@Composable
+private fun AccountSections(
+    account: PlayerAccountDto,
+    state: AccountViewModel.State,
+    viewModel: AccountViewModel,
+    onOpenTrustedDevices: () -> Unit,
+    onOpenRecoveryCodes: () -> Unit,
+) {
+    UsernameSection(account, state, viewModel)
+    PasswordSection(account, state, viewModel)
+    TwoFactorSection(account, state, viewModel)
+    SecuritySection(onOpenTrustedDevices, onOpenRecoveryCodes)
+    IdentitiesSection(state, viewModel)
+}
+
+/**
+ * Links to the dedicated trusted-device and recovery-code screens
+ * (TRUSTED_DEVICES_MFA.md). Kept simple — the management UX lives on those screens.
+ */
+@Composable
+private fun SecuritySection(onOpenTrustedDevices: () -> Unit, onOpenRecoveryCodes: () -> Unit) {
+    SectionCard(R.string.account_security_title) {
+        OutlinedButton(
+            onClick = onOpenTrustedDevices,
+            modifier = Modifier.fillMaxWidth().padding(top = 12.dp),
+        ) { Text(stringResource(R.string.account_security_trusted_devices)) }
+        OutlinedButton(
+            onClick = onOpenRecoveryCodes,
+            modifier = Modifier.fillMaxWidth().padding(top = 8.dp),
+        ) { Text(stringResource(R.string.account_security_recovery_codes)) }
+    }
+}
+
+@Composable
+private fun SectionCard(@StringRes titleRes: Int, content: @Composable () -> Unit) {
+    Card(Modifier.fillMaxWidth().padding(top = 12.dp)) {
+        Column(Modifier.padding(16.dp)) {
+            Text(stringResource(titleRes), style = MaterialTheme.typography.titleMedium)
+            content()
+        }
+    }
+}
+
+@Composable
+private fun UsernameSection(
+    account: PlayerAccountDto,
+    state: AccountViewModel.State,
+    viewModel: AccountViewModel,
+) {
+    var username by rememberSaveable(account.username) { mutableStateOf(account.username) }
+    SectionCard(R.string.account_username_title) {
+        OutlinedTextField(
+            value = username,
+            onValueChange = { username = it },
+            singleLine = true,
+            enabled = !state.busy,
+            label = { Text(stringResource(R.string.login_username)) },
+            modifier = Modifier.fillMaxWidth().padding(top = 12.dp),
+        )
+        Button(
+            onClick = { viewModel.changeUsername(username) },
+            enabled = !state.busy && username.trim() != account.username && username.trim().length >= 3,
+            modifier = Modifier.padding(top = 12.dp),
+        ) { Text(stringResource(R.string.account_username_action)) }
+        SectionFeedback(state.feedback, Section.USERNAME)
+    }
+}
+
+@Composable
+private fun PasswordSection(
+    account: PlayerAccountDto,
+    state: AccountViewModel.State,
+    viewModel: AccountViewModel,
+) {
+    val hasPassword = account.has_password
+    var current by rememberSaveable { mutableStateOf("") }
+    var next by rememberSaveable { mutableStateOf("") }
+    SectionCard(if (hasPassword) R.string.account_password_title else R.string.account_password_set_title) {
+        if (!hasPassword) {
+            Text(
+                stringResource(R.string.account_password_set_hint),
+                style = MaterialTheme.typography.bodySmall,
+                color = MaterialTheme.colorScheme.onSurfaceVariant,
+                modifier = Modifier.padding(top = 8.dp),
+            )
+        }
+        if (hasPassword) {
+            OutlinedTextField(
+                value = current,
+                onValueChange = { current = it },
+                singleLine = true,
+                enabled = !state.busy,
+                label = { Text(stringResource(R.string.account_password_current)) },
+                visualTransformation = PasswordVisualTransformation(),
+                keyboardOptions = KeyboardOptions(keyboardType = KeyboardType.Password),
+                modifier = Modifier.fillMaxWidth().padding(top = 12.dp),
+            )
+        }
+        OutlinedTextField(
+            value = next,
+            onValueChange = { next = it },
+            singleLine = true,
+            enabled = !state.busy,
+            label = { Text(stringResource(R.string.account_password_new)) },
+            visualTransformation = PasswordVisualTransformation(),
+            keyboardOptions = KeyboardOptions(keyboardType = KeyboardType.Password),
+            modifier = Modifier.fillMaxWidth().padding(top = 12.dp),
+        )
+        Button(
+            onClick = {
+                viewModel.changePassword(next, if (hasPassword) current else null)
+                current = ""
+                next = ""
+            },
+            enabled = !state.busy && next.length >= 8 && (!hasPassword || current.isNotBlank()),
+            modifier = Modifier.padding(top = 12.dp),
+        ) {
+            Text(stringResource(if (hasPassword) R.string.account_password_action else R.string.account_password_set_action))
+        }
+        SectionFeedback(state.feedback, Section.PASSWORD)
+    }
+}
+
+@Composable
+private fun TwoFactorSection(
+    account: PlayerAccountDto,
+    state: AccountViewModel.State,
+    viewModel: AccountViewModel,
+) {
+    var code by rememberSaveable { mutableStateOf("") }
+    SectionCard(R.string.account_totp_title) {
+        StatusPill(
+            text = stringResource(if (account.totp_enabled) R.string.account_totp_on else R.string.account_totp_off),
+            tone = if (account.totp_enabled) PillTone.Success else PillTone.Neutral,
+            modifier = Modifier.padding(top = 8.dp),
+        )
+
+        when {
+            // Enabled → offer disable via a current code.
+            account.totp_enabled -> {
+                CodeField(code, { code = it }, !state.busy)
+                Button(
+                    onClick = { viewModel.disableTotp(code); code = "" },
+                    enabled = !state.busy && code.isNotBlank(),
+                    modifier = Modifier.padding(top = 12.dp),
+                ) { Text(stringResource(R.string.account_totp_disable)) }
+            }
+            // Mid-enrollment → show QR + confirm.
+            state.totpSetup != null -> {
+                Text(
+                    stringResource(R.string.account_totp_scan),
+                    style = MaterialTheme.typography.bodySmall,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                    modifier = Modifier.padding(top = 12.dp),
+                )
+                rememberQrBitmap(state.totpSetup.qr)?.let { bmp ->
+                    Image(
+                        bitmap = bmp,
+                        contentDescription = stringResource(R.string.account_totp_qr_desc),
+                        modifier = Modifier.padding(top = 12.dp).size(180.dp),
+                    )
+                }
+                CodeField(code, { code = it }, !state.busy)
+                Row(Modifier.padding(top = 12.dp), horizontalArrangement = Arrangement.spacedBy(8.dp)) {
+                    Button(
+                        onClick = { viewModel.enableTotp(code); code = "" },
+                        enabled = !state.busy && code.isNotBlank(),
+                    ) { Text(stringResource(R.string.account_totp_confirm)) }
+                    OutlinedButton(onClick = { viewModel.cancelTotp(); code = "" }, enabled = !state.busy) {
+                        Text(stringResource(R.string.account_totp_cancel))
+                    }
+                }
+            }
+            // Not enabled, not enrolling → start.
+            else -> {
+                Button(
+                    onClick = viewModel::beginTotp,
+                    enabled = !state.busy,
+                    modifier = Modifier.padding(top = 12.dp),
+                ) { Text(stringResource(R.string.account_totp_setup)) }
+            }
+        }
+        SectionFeedback(state.feedback, Section.TOTP)
+    }
+}
+
+@Composable
+private fun IdentitiesSection(state: AccountViewModel.State, viewModel: AccountViewModel) {
+    SectionCard(R.string.account_identities_title) {
+        if (state.identities.isEmpty()) {
+            Text(
+                stringResource(R.string.account_identities_empty),
+                style = MaterialTheme.typography.bodySmall,
+                color = MaterialTheme.colorScheme.onSurfaceVariant,
+                modifier = Modifier.padding(top = 8.dp),
+            )
+        } else {
+            state.identities.forEach { identity -> IdentityRow(identity, state.busy, viewModel) }
+        }
+        SectionFeedback(state.feedback, Section.IDENTITY)
+    }
+}
+
+@Composable
+private fun IdentityRow(identity: LinkedIdentityDto, busy: Boolean, viewModel: AccountViewModel) {
+    Row(
+        Modifier.fillMaxWidth().padding(top = 12.dp),
+        verticalAlignment = Alignment.CenterVertically,
+    ) {
+        Column(Modifier.weight(1f)) {
+            Text(
+                identity.provider.replaceFirstChar { it.uppercase() },
+                style = MaterialTheme.typography.bodyLarge,
+            )
+            identity.email?.let {
+                Text(it, style = MaterialTheme.typography.bodySmall, color = MaterialTheme.colorScheme.onSurfaceVariant)
+            }
+        }
+        TextButton(onClick = { viewModel.unlinkIdentity(identity.provider) }, enabled = !busy) {
+            Text(stringResource(R.string.account_identity_unlink))
+        }
+    }
+}
+
+@Composable
+private fun CodeField(code: String, onChange: (String) -> Unit, enabled: Boolean) {
+    OutlinedTextField(
+        value = code,
+        onValueChange = { onChange(it.filter(Char::isDigit).take(8)) },
+        singleLine = true,
+        enabled = enabled,
+        label = { Text(stringResource(R.string.login_totp_code)) },
+        keyboardOptions = KeyboardOptions(keyboardType = KeyboardType.NumberPassword),
+        modifier = Modifier.fillMaxWidth().padding(top = 12.dp),
+    )
+}
+
+@Composable
+private fun SectionFeedback(feedback: Feedback?, section: Section) {
+    if (feedback == null || feedback.section != section) return
+    Text(
+        text = stringResource(feedback.messageRes),
+        style = MaterialTheme.typography.bodySmall,
+        color = if (feedback.ok) MaterialTheme.colorScheme.primary else MaterialTheme.colorScheme.error,
+        modifier = Modifier.padding(top = 10.dp),
+    )
+}
+
+/** Decode a `data:image/png;base64,…` URL (the TOTP QR) into an [ImageBitmap]. */
+@Composable
+private fun rememberQrBitmap(dataUrl: String?): ImageBitmap? = remember(dataUrl) {
+    if (dataUrl.isNullOrBlank()) return@remember null
+    val comma = dataUrl.indexOf(',')
+    if (comma < 0) return@remember null
+    runCatching {
+        val bytes = Base64.decode(dataUrl.substring(comma + 1), Base64.DEFAULT)
+        BitmapFactory.decodeByteArray(bytes, 0, bytes.size)?.asImageBitmap()
+    }.getOrNull()
+}
+
+/** Human label for a role (advisory display only — §4.3). */
+@StringRes
+fun roleLabelRes(role: Role): Int = when (role) {
+    Role.PLAYER -> R.string.role_player
+    Role.MODERATOR -> R.string.role_moderator
+    Role.EDITOR -> R.string.role_editor
+    Role.ADMIN -> R.string.role_admin
+    Role.UNKNOWN -> R.string.role_unknown
+}

app/src/main/java/com/runicgateway/app/ui/auth/AccountViewModel.kt

@@ -0,0 +1,193 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.ui.auth
+
+import androidx.annotation.StringRes
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.viewModelScope
+import com.runicgateway.app.R
+import com.runicgateway.app.core.result.ApiResult
+import com.runicgateway.app.data.api.dto.LinkedIdentityDto
+import com.runicgateway.app.data.api.dto.PlayerAccountDto
+import com.runicgateway.app.data.api.dto.TotpSetupDto
+import com.runicgateway.app.data.repository.AccountRepository
+import com.runicgateway.app.data.repository.AuthRepository
+import com.runicgateway.app.ui.UiState
+import com.runicgateway.app.ui.toUiState
+import dagger.hilt.android.lifecycle.HiltViewModel
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.StateFlow
+import kotlinx.coroutines.flow.asStateFlow
+import kotlinx.coroutines.flow.update
+import kotlinx.coroutines.launch
+import javax.inject.Inject
+
+/**
+ * Drives the signed-in self-service surface (PLAN.md §6.3, §6.4) over
+ * `/auth/me/account*`: change username/password, enroll/disable TOTP, and manage
+ * linked SSO identities. Each mutation folds its [ApiResult] into a section-scoped
+ * [Feedback] so the screen shows friendly, localized copy inline (§7). A username
+ * change also re-validates the session so the shell reflects the new name at once.
+ */
+@HiltViewModel
+class AccountViewModel @Inject constructor(
+    private val accountRepository: AccountRepository,
+    private val authRepository: AuthRepository,
+) : ViewModel() {
+
+    /** Which section an action's [Feedback] belongs to, so it renders in place. */
+    enum class Section { USERNAME, PASSWORD, TOTP, IDENTITY }
+
+    /** A one-shot result banner under a section. */
+    data class Feedback(val section: Section, val ok: Boolean, @param:StringRes val messageRes: Int)
+
+    data class State(
+        val account: UiState<PlayerAccountDto> = UiState.Loading,
+        val identities: List<LinkedIdentityDto> = emptyList(),
+        /** True while any mutation is in flight (disables that section's controls). */
+        val busy: Boolean = false,
+        /** The pending TOTP enrollment (QR shown) between setup and enable. */
+        val totpSetup: TotpSetupDto? = null,
+        /** The single-use recovery codes returned once when 2FA was just enabled. */
+        val recoveryCodesOnce: List<String>? = null,
+        val feedback: Feedback? = null,
+    )
+
+    private val _state = MutableStateFlow(State())
+    val state: StateFlow<State> = _state.asStateFlow()
+
+    init {
+        load()
+    }
+
+    fun load() {
+        _state.update { it.copy(account = UiState.Loading) }
+        viewModelScope.launch {
+            val account = accountRepository.getAccount()
+            _state.update { it.copy(account = account.toUiState()) }
+            // Identities are non-critical — an empty list on failure is fine.
+            when (val ids = accountRepository.identities()) {
+                is ApiResult.Ok -> _state.update { it.copy(identities = ids.data) }
+                else -> Unit
+            }
+        }
+    }
+
+    fun clearFeedback() = _state.update { it.copy(feedback = null) }
+
+    // ── Username ─────────────────────────────────────────────────────────
+    fun changeUsername(username: String) {
+        if (_state.value.busy) return
+        _state.update { it.copy(busy = true, feedback = null) }
+        viewModelScope.launch {
+            when (val result = accountRepository.changeUsername(username.trim())) {
+                is ApiResult.Ok -> {
+                    finish(Section.USERNAME, true, R.string.account_username_changed)
+                    // Reflect the new name in the shell + refresh the loaded account.
+                    authRepository.revalidate()
+                    reloadAccount()
+                }
+                else -> finish(Section.USERNAME, false, usernameErrorRes(result))
+            }
+        }
+    }
+
+    // ── Password ─────────────────────────────────────────────────────────
+    fun changePassword(newPassword: String, currentPassword: String?) {
+        if (_state.value.busy) return
+        _state.update { it.copy(busy = true, feedback = null) }
+        viewModelScope.launch {
+            when (accountRepository.changePassword(newPassword, currentPassword?.takeIf { it.isNotBlank() })) {
+                is ApiResult.Ok -> finish(Section.PASSWORD, true, R.string.account_password_changed)
+                is ApiResult.HttpError -> finish(Section.PASSWORD, false, R.string.account_password_error)
+                is ApiResult.NetworkError -> finish(Section.PASSWORD, false, R.string.error_network)
+            }
+        }
+    }
+
+    // ── TOTP ─────────────────────────────────────────────────────────────
+    fun beginTotp() {
+        if (_state.value.busy) return
+        _state.update { it.copy(busy = true, feedback = null) }
+        viewModelScope.launch {
+            when (val result = accountRepository.totpSetup()) {
+                is ApiResult.Ok -> _state.update { it.copy(busy = false, totpSetup = result.data) }
+                else -> finish(Section.TOTP, false, R.string.account_totp_setup_error)
+            }
+        }
+    }
+
+    fun cancelTotp() = _state.update { it.copy(totpSetup = null, feedback = null) }
+
+    fun enableTotp(code: String) {
+        if (_state.value.busy) return
+        _state.update { it.copy(busy = true, feedback = null) }
+        viewModelScope.launch {
+            when (val result = accountRepository.totpEnable(code.trim())) {
+                is ApiResult.Ok -> {
+                    // 2FA enable returns the fresh recovery-code batch once — surface it.
+                    _state.update {
+                        it.copy(totpSetup = null, recoveryCodesOnce = result.data.recoveryCodes?.takeIf(List<String>::isNotEmpty))
+                    }
+                    finish(Section.TOTP, true, R.string.account_totp_enabled)
+                    reloadAccount()
+                }
+                is ApiResult.HttpError -> finish(Section.TOTP, false, R.string.account_totp_code_error)
+                is ApiResult.NetworkError -> finish(Section.TOTP, false, R.string.error_network)
+            }
+        }
+    }
+
+    /** Dismiss the one-time recovery-code batch shown after enabling 2FA. */
+    fun dismissRecoveryCodes() = _state.update { it.copy(recoveryCodesOnce = null) }
+
+    fun disableTotp(code: String) {
+        if (_state.value.busy) return
+        _state.update { it.copy(busy = true, feedback = null) }
+        viewModelScope.launch {
+            when (accountRepository.totpDisable(code.trim())) {
+                is ApiResult.Ok -> {
+                    finish(Section.TOTP, true, R.string.account_totp_disabled)
+                    reloadAccount()
+                }
+                is ApiResult.HttpError -> finish(Section.TOTP, false, R.string.account_totp_code_error)
+                is ApiResult.NetworkError -> finish(Section.TOTP, false, R.string.error_network)
+            }
+        }
+    }
+
+    // ── Identities ───────────────────────────────────────────────────────
+    fun unlinkIdentity(provider: String) {
+        if (_state.value.busy) return
+        _state.update { it.copy(busy = true, feedback = null) }
+        viewModelScope.launch {
+            when (accountRepository.unlinkIdentity(provider)) {
+                is ApiResult.Ok -> {
+                    finish(Section.IDENTITY, true, R.string.account_identity_unlinked)
+                    when (val ids = accountRepository.identities()) {
+                        is ApiResult.Ok -> _state.update { it.copy(identities = ids.data) }
+                        else -> Unit
+                    }
+                }
+                else -> finish(Section.IDENTITY, false, R.string.account_identity_error)
+            }
+        }
+    }
+
+    private suspend fun reloadAccount() {
+        when (val account = accountRepository.getAccount()) {
+            is ApiResult.Ok -> _state.update { it.copy(account = UiState.Success(account.data)) }
+            else -> Unit
+        }
+    }
+
+    private fun finish(section: Section, ok: Boolean, @StringRes messageRes: Int) =
+        _state.update { it.copy(busy = false, feedback = Feedback(section, ok, messageRes)) }
+
+    private fun usernameErrorRes(result: ApiResult<*>): Int = when {
+        result is ApiResult.HttpError && result.status == 409 -> R.string.account_username_taken
+        result is ApiResult.NetworkError -> R.string.error_network
+        else -> R.string.account_username_error
+    }
+}

app/src/main/java/com/runicgateway/app/ui/auth/LoginScreen.kt

@@ -0,0 +1,338 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.ui.auth
+
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.Spacer
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.height
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.size
+import androidx.compose.foundation.rememberScrollState
+import androidx.compose.foundation.text.KeyboardActions
+import androidx.compose.foundation.text.KeyboardOptions
+import androidx.compose.foundation.verticalScroll
+import androidx.compose.material3.Button
+import androidx.compose.material3.Checkbox
+import androidx.compose.material3.CircularProgressIndicator
+import androidx.compose.material3.ExperimentalMaterial3Api
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.ModalBottomSheet
+import androidx.compose.material3.OutlinedButton
+import androidx.compose.material3.OutlinedTextField
+import androidx.compose.material3.Text
+import androidx.compose.material3.TextButton
+import androidx.compose.material3.rememberModalBottomSheetState
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.LaunchedEffect
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.setValue
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.platform.LocalContext
+import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.text.input.ImeAction
+import androidx.compose.ui.text.input.KeyboardType
+import androidx.compose.ui.text.input.PasswordVisualTransformation
+import androidx.compose.ui.text.style.TextAlign
+import androidx.compose.ui.unit.dp
+import androidx.hilt.navigation.compose.hiltViewModel
+import androidx.lifecycle.compose.collectAsStateWithLifecycle
+import com.runicgateway.app.R
+import com.runicgateway.app.core.web.WebHandoff
+import com.runicgateway.app.ui.auth.LoginViewModel.LoginError
+
+/**
+ * Native username/password (+TOTP) login (PLAN.md §4.1) — the app's only native
+ * credential screen. Registration, forgot-password, and SSO are website hand-offs
+ * opened in a Custom Tab (§4.2); the user completes them in the browser and
+ * returns here to sign in.
+ */
+@Composable
+fun LoginScreen(
+    onSignedIn: () -> Unit,
+    modifier: Modifier = Modifier,
+    viewModel: LoginViewModel = hiltViewModel(),
+) {
+    val state by viewModel.state.collectAsStateWithLifecycle()
+    val context = LocalContext.current
+
+    LaunchedEffect(state.signedIn) {
+        if (state.signedIn) onSignedIn()
+    }
+
+    // Open a freshly-minted SSO /start URL in a Custom Tab, exactly once (§4.2).
+    LaunchedEffect(state.ssoLaunchUrl) {
+        val url = state.ssoLaunchUrl ?: return@LaunchedEffect
+        WebHandoff.open(context, url)
+        viewModel.onSsoLaunchConsumed()
+    }
+
+    Column(
+        modifier = modifier
+            .fillMaxSize()
+            .verticalScroll(rememberScrollState())
+            .padding(24.dp),
+        horizontalAlignment = Alignment.CenterHorizontally,
+        verticalArrangement = Arrangement.Center,
+    ) {
+        Text(
+            text = stringResource(R.string.login_title),
+            style = MaterialTheme.typography.headlineSmall,
+            textAlign = TextAlign.Center,
+        )
+        Text(
+            text = stringResource(R.string.login_subtitle),
+            style = MaterialTheme.typography.bodyMedium,
+            textAlign = TextAlign.Center,
+            modifier = Modifier.padding(top = 8.dp, bottom = 24.dp),
+        )
+
+        OutlinedTextField(
+            value = state.username,
+            onValueChange = viewModel::onUsernameChange,
+            singleLine = true,
+            enabled = !state.submitting,
+            label = { Text(stringResource(R.string.login_username)) },
+            keyboardOptions = KeyboardOptions(
+                keyboardType = KeyboardType.Text,
+                imeAction = ImeAction.Next,
+            ),
+            modifier = Modifier.fillMaxWidth(),
+        )
+
+        OutlinedTextField(
+            value = state.password,
+            onValueChange = viewModel::onPasswordChange,
+            singleLine = true,
+            enabled = !state.submitting,
+            label = { Text(stringResource(R.string.login_password)) },
+            visualTransformation = PasswordVisualTransformation(),
+            keyboardOptions = KeyboardOptions(
+                keyboardType = KeyboardType.Password,
+                imeAction = if (state.totpRequired) ImeAction.Next else ImeAction.Go,
+            ),
+            keyboardActions = KeyboardActions(onGo = { viewModel.submit() }),
+            modifier = Modifier
+                .fillMaxWidth()
+                .padding(top = 12.dp),
+        )
+
+        if (state.totpRequired) {
+            if (state.useRecoveryCode) {
+                OutlinedTextField(
+                    value = state.recoveryCode,
+                    onValueChange = viewModel::onRecoveryCodeChange,
+                    singleLine = true,
+                    enabled = !state.submitting,
+                    label = { Text(stringResource(R.string.login_recovery_code)) },
+                    supportingText = { Text(stringResource(R.string.login_recovery_hint)) },
+                    keyboardOptions = KeyboardOptions(
+                        keyboardType = KeyboardType.Password,
+                        imeAction = ImeAction.Go,
+                    ),
+                    keyboardActions = KeyboardActions(onGo = { viewModel.submit() }),
+                    modifier = Modifier
+                        .fillMaxWidth()
+                        .padding(top = 12.dp),
+                )
+            } else {
+                OutlinedTextField(
+                    value = state.code,
+                    onValueChange = viewModel::onCodeChange,
+                    singleLine = true,
+                    enabled = !state.submitting,
+                    label = { Text(stringResource(R.string.login_totp_code)) },
+                    supportingText = { Text(stringResource(R.string.login_totp_hint)) },
+                    keyboardOptions = KeyboardOptions(
+                        keyboardType = KeyboardType.NumberPassword,
+                        imeAction = ImeAction.Go,
+                    ),
+                    keyboardActions = KeyboardActions(onGo = { viewModel.submit() }),
+                    modifier = Modifier
+                        .fillMaxWidth()
+                        .padding(top = 12.dp),
+                )
+            }
+
+            // Toggle between authenticator code and a single-use recovery code.
+            TextButton(
+                onClick = { viewModel.onUseRecoveryCodeChange(!state.useRecoveryCode) },
+                enabled = !state.submitting,
+                modifier = Modifier.align(Alignment.Start),
+            ) {
+                Text(
+                    stringResource(
+                        if (state.useRecoveryCode) R.string.login_use_totp_instead
+                        else R.string.login_use_recovery_instead,
+                    ),
+                )
+            }
+
+            // "Trust this device" → skip the 2FA step on future logins here.
+            Row(
+                verticalAlignment = Alignment.CenterVertically,
+                modifier = Modifier
+                    .fillMaxWidth()
+                    .padding(top = 4.dp),
+            ) {
+                Checkbox(
+                    checked = state.trustDevice,
+                    onCheckedChange = viewModel::onTrustDeviceChange,
+                    enabled = !state.submitting,
+                )
+                Text(
+                    text = stringResource(R.string.login_trust_device),
+                    style = MaterialTheme.typography.bodyMedium,
+                )
+            }
+        }
+
+        state.error?.let { err ->
+            Text(
+                text = stringResource(loginErrorRes(err)),
+                color = MaterialTheme.colorScheme.error,
+                style = MaterialTheme.typography.bodyMedium,
+                textAlign = TextAlign.Center,
+                modifier = Modifier
+                    .fillMaxWidth()
+                    .padding(top = 12.dp),
+            )
+        }
+
+        Button(
+            onClick = viewModel::submit,
+            enabled = !state.submitting,
+            modifier = Modifier
+                .fillMaxWidth()
+                .padding(top = 20.dp),
+        ) {
+            if (state.submitting) {
+                CircularProgressIndicator(
+                    strokeWidth = 2.dp,
+                    modifier = Modifier.size(20.dp),
+                    color = MaterialTheme.colorScheme.onPrimary,
+                )
+            } else {
+                Text(stringResource(R.string.login_button))
+            }
+        }
+
+        // ── Native SSO (§4.2, M9): a single "Sign in with SSO" button that opens the
+        // Custom-Tab bridge. With one provider it launches straight through; with
+        // several it presents a native picker (below). No website-login fallback —
+        // that page can't deep-link the session back; a failed discovery offers a retry.
+        var showSsoPicker by remember { mutableStateOf(false) }
+        when {
+            state.ssoProviders.isNotEmpty() -> {
+                OutlinedButton(
+                    onClick = {
+                        val providers = state.ssoProviders
+                        if (providers.size == 1) viewModel.onSsoProviderClick(providers.first())
+                        else showSsoPicker = true
+                    },
+                    enabled = !state.submitting,
+                    modifier = Modifier
+                        .fillMaxWidth()
+                        .padding(top = 12.dp),
+                ) {
+                    Text(stringResource(R.string.login_sso_button))
+                }
+            }
+
+            state.ssoDiscovering -> {
+                Text(
+                    text = stringResource(R.string.login_sso_loading),
+                    style = MaterialTheme.typography.bodySmall,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                    modifier = Modifier.padding(top = 12.dp),
+                )
+            }
+
+            state.ssoUnavailable -> {
+                TextButton(
+                    onClick = { viewModel.discoverSsoProviders() },
+                    modifier = Modifier.padding(top = 4.dp),
+                ) {
+                    Text(stringResource(R.string.login_sso_retry))
+                }
+            }
+            // else: discovery succeeded with no providers — this shard offers no SSO.
+        }
+
+        // ── Website hand-offs (§4.2): open the site's own pages in a Custom Tab ──
+        viewModel.registerUrl?.let { url ->
+            TextButton(
+                onClick = { WebHandoff.open(context, url) },
+                modifier = Modifier.padding(top = 16.dp),
+            ) { Text(stringResource(R.string.login_register)) }
+        }
+        viewModel.forgotPasswordUrl?.let { url ->
+            TextButton(onClick = { WebHandoff.open(context, url) }) {
+                Text(stringResource(R.string.login_forgot))
+            }
+        }
+
+        if (showSsoPicker) {
+            SsoProviderPicker(
+                providers = state.ssoProviders,
+                onDismiss = { showSsoPicker = false },
+                onPick = { provider ->
+                    showSsoPicker = false
+                    viewModel.onSsoProviderClick(provider)
+                },
+            )
+        }
+    }
+}
+
+/**
+ * The native provider picker (§4.2): a bottom sheet listing the shard's enabled SSO
+ * providers so a single "Sign in with SSO" button can serve several IdPs without a
+ * website chooser page. Each row opens the Custom-Tab bridge for that provider.
+ */
+@OptIn(ExperimentalMaterial3Api::class)
+@Composable
+private fun SsoProviderPicker(
+    providers: List<com.runicgateway.app.data.api.dto.SsoProviderDto>,
+    onDismiss: () -> Unit,
+    onPick: (com.runicgateway.app.data.api.dto.SsoProviderDto) -> Unit,
+) {
+    ModalBottomSheet(onDismissRequest = onDismiss, sheetState = rememberModalBottomSheetState()) {
+        Text(
+            text = stringResource(R.string.login_sso_pick_title),
+            style = MaterialTheme.typography.titleMedium,
+            modifier = Modifier.padding(horizontal = 24.dp, vertical = 8.dp),
+        )
+        providers.forEach { provider ->
+            TextButton(
+                onClick = { onPick(provider) },
+                modifier = Modifier
+                    .fillMaxWidth()
+                    .padding(horizontal = 12.dp, vertical = 2.dp),
+            ) {
+                Text(
+                    text = stringResource(R.string.login_sso_provider, provider.name),
+                    modifier = Modifier.fillMaxWidth(),
+                    textAlign = TextAlign.Start,
+                )
+            }
+        }
+        Spacer(Modifier.height(24.dp)) // clears the gesture inset at the sheet's bottom
+    }
+}
+
+private fun loginErrorRes(error: LoginError): Int = when (error) {
+    LoginError.INVALID_CREDENTIALS -> R.string.login_error_credentials
+    LoginError.BAD_CODE -> R.string.login_error_code
+    LoginError.RATE_LIMITED -> R.string.login_error_rate_limited
+    LoginError.SERVER -> R.string.login_error_server
+    LoginError.NETWORK -> R.string.login_error_network
+    LoginError.SSO -> R.string.login_error_sso
+}

app/src/main/java/com/runicgateway/app/ui/auth/LoginViewModel.kt

@@ -0,0 +1,220 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.ui.auth
+
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.viewModelScope
+import com.runicgateway.app.core.auth.sso.SsoAuthManager
+import com.runicgateway.app.core.web.WebsiteUrls
+import com.runicgateway.app.data.api.dto.SsoProviderDto
+import com.runicgateway.app.data.repository.AuthRepository
+import com.runicgateway.app.data.repository.AuthRepository.LoginResult
+import com.runicgateway.app.data.repository.AuthRepository.SsoDiscovery
+import dagger.hilt.android.lifecycle.HiltViewModel
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.StateFlow
+import kotlinx.coroutines.flow.asStateFlow
+import kotlinx.coroutines.flow.update
+import kotlinx.coroutines.launch
+import javax.inject.Inject
+
+/**
+ * Drives the native login screen (PLAN.md §4.1): username/password, single-request
+ * TOTP (the code field is revealed once the backend answers `totpRequired`), and
+ * friendly 429 backoff handling. Registration / forgot-password / SSO are website
+ * hand-offs whose URLs it exposes (§4.2).
+ */
+@HiltViewModel
+class LoginViewModel @Inject constructor(
+    private val authRepository: AuthRepository,
+    private val ssoAuthManager: SsoAuthManager,
+    private val websiteUrls: WebsiteUrls,
+) : ViewModel() {
+
+    /** The transient error surfaced under the form after a failed attempt. */
+    enum class LoginError { INVALID_CREDENTIALS, BAD_CODE, RATE_LIMITED, SERVER, NETWORK, SSO }
+
+    data class UiState(
+        val username: String = "",
+        val password: String = "",
+        val code: String = "",
+        /** A single-use recovery code, entered instead of [code] when [useRecoveryCode]. */
+        val recoveryCode: String = "",
+        /** True once the account is known to have 2FA on — reveal the code field. */
+        val totpRequired: Boolean = false,
+        /** "Enter a recovery code instead" — swap the TOTP field for the recovery field. */
+        val useRecoveryCode: Boolean = false,
+        /** "Trust this device" — skip the 2FA step on future logins (TRUSTED_DEVICES_MFA.md). */
+        val trustDevice: Boolean = false,
+        val submitting: Boolean = false,
+        val error: LoginError? = null,
+        val signedIn: Boolean = false,
+        /** The shard's enabled SSO providers (§4.2); empty until discovery resolves. */
+        val ssoProviders: List<SsoProviderDto> = emptyList(),
+        /** True while discovery is in flight — the screen shows a spinner, not an empty gap. */
+        val ssoDiscovering: Boolean = true,
+        /** True when discovery failed (offline/server) — offer a retry rather than a dead end. */
+        val ssoUnavailable: Boolean = false,
+        /** A `/auth/mobile/sso/start` URL the screen should open in a Custom Tab, once. */
+        val ssoLaunchUrl: String? = null,
+    )
+
+    private val _state = MutableStateFlow(UiState())
+    val state: StateFlow<UiState> = _state.asStateFlow()
+
+    init {
+        discoverSsoProviders()
+        // Consume the SSO bridge outcome: a returned callback completes here even if
+        // this ViewModel was recreated while the Custom Tab was foreground (§4.2).
+        viewModelScope.launch {
+            ssoAuthManager.outcome.collect { outcome ->
+                when (outcome) {
+                    SsoAuthManager.Outcome.Success -> {
+                        ssoAuthManager.consumeOutcome()
+                        _state.update { it.copy(submitting = false, signedIn = true) }
+                    }
+                    is SsoAuthManager.Outcome.Failed -> {
+                        ssoAuthManager.consumeOutcome()
+                        _state.update { it.copy(submitting = false, error = mapSsoError(outcome.reason)) }
+                    }
+                    SsoAuthManager.Outcome.Idle -> Unit
+                }
+            }
+        }
+    }
+
+    fun onUsernameChange(value: String) = _state.update { it.copy(username = value, error = null) }
+    fun onPasswordChange(value: String) = _state.update { it.copy(password = value, error = null) }
+    fun onCodeChange(value: String) =
+        _state.update { it.copy(code = value.filter(Char::isDigit).take(8), error = null) }
+
+    /** Recovery codes are alphanumeric; keep it permissive, just trim length + noise. */
+    fun onRecoveryCodeChange(value: String) =
+        _state.update { it.copy(recoveryCode = value.filterNot(Char::isWhitespace).take(32), error = null) }
+
+    fun onTrustDeviceChange(value: Boolean) = _state.update { it.copy(trustDevice = value) }
+
+    /** Toggle between the TOTP field and the recovery-code field on the 2FA step. */
+    fun onUseRecoveryCodeChange(value: Boolean) =
+        _state.update { it.copy(useRecoveryCode = value, error = null) }
+
+    val registerUrl: String? get() = websiteUrls.register()
+    val forgotPasswordUrl: String? get() = websiteUrls.forgotPassword()
+
+    /**
+     * Discover the shard's native SSO providers (§4.2). A failure surfaces a retry
+     * affordance instead of the old dead website-login hand-off, which was never
+     * mobile-formatted and could not deep-link the session back.
+     */
+    fun discoverSsoProviders() {
+        _state.update { it.copy(ssoDiscovering = true, ssoUnavailable = false) }
+        viewModelScope.launch {
+            when (val result = authRepository.ssoProviders()) {
+                is SsoDiscovery.Available ->
+                    _state.update {
+                        it.copy(ssoProviders = result.providers, ssoDiscovering = false, ssoUnavailable = false)
+                    }
+                SsoDiscovery.None ->
+                    _state.update {
+                        it.copy(ssoProviders = emptyList(), ssoDiscovering = false, ssoUnavailable = false)
+                    }
+                SsoDiscovery.Unavailable ->
+                    _state.update {
+                        it.copy(ssoProviders = emptyList(), ssoDiscovering = false, ssoUnavailable = true)
+                    }
+            }
+        }
+    }
+
+    /**
+     * Begin a native SSO flow for [provider]: mint PKCE + state and surface the
+     * `/start` URL for the screen to open in a Custom Tab. No-op (leaves a SERVER
+     * error) if the base URL isn't set yet — the website fallback still shows.
+     */
+    fun onSsoProviderClick(provider: SsoProviderDto) {
+        if (_state.value.submitting) return
+        val url = ssoAuthManager.buildStartUrl(provider.id)
+        if (url == null) {
+            _state.update { it.copy(error = LoginError.SSO) }
+            return
+        }
+        _state.update { it.copy(error = null, ssoLaunchUrl = url) }
+    }
+
+    /** The screen has opened the Custom Tab; clear so it isn't re-launched on recompose. */
+    fun onSsoLaunchConsumed() = _state.update { it.copy(ssoLaunchUrl = null) }
+
+    private fun mapSsoError(reason: SsoAuthManager.Failure): LoginError = when (reason) {
+        SsoAuthManager.Failure.NETWORK -> LoginError.NETWORK
+        else -> LoginError.SSO
+    }
+
+    fun submit() {
+        val s = _state.value
+        if (s.submitting) return
+        val validationError = validateForSubmit(s)
+        if (validationError != null) {
+            _state.update { it.copy(error = validationError) }
+            return
+        }
+
+        _state.update { it.copy(submitting = true, error = null) }
+        viewModelScope.launch {
+            // Only one second factor is sent; the recovery toggle picks which.
+            val code = s.code.trim().takeIf { it.isNotBlank() && !s.useRecoveryCode }
+            val recoveryCode = s.recoveryCode.trim().takeIf { it.isNotBlank() && s.useRecoveryCode }
+            val result = authRepository.login(
+                username = s.username.trim(),
+                password = s.password,
+                code = code,
+                recoveryCode = recoveryCode,
+                trustDevice = s.trustDevice,
+            )
+            applyLoginResult(result)
+        }
+    }
+
+    /** Pre-flight form checks for [submit]; returns the error to surface, or null if ready to send. */
+    private fun validateForSubmit(s: UiState): LoginError? {
+        if (s.username.isBlank() || s.password.isBlank()) return LoginError.INVALID_CREDENTIALS
+        // If 2FA is being requested, the chosen second factor must accompany the resubmit.
+        if (s.totpRequired) {
+            val factor = if (s.useRecoveryCode) s.recoveryCode else s.code
+            if (factor.isBlank()) return LoginError.BAD_CODE
+        }
+        return null
+    }
+
+    /** Folds a [LoginResult] back into the UI state (clears [UiState.submitting] on every path). */
+    private fun applyLoginResult(result: LoginResult) = when (result) {
+        is LoginResult.Success ->
+            // The trusted-device cap (result.trustLimitReached) is an edge case:
+            // login succeeded but the device wasn't remembered. It's surfaced +
+            // managed on the Trusted Devices screen rather than blocking sign-in.
+            _state.update { it.copy(submitting = false, signedIn = true) }
+
+        LoginResult.TotpRequired ->
+            // Reveal the 2FA fields; a wrong code/recovery code re-lands here as BAD_CODE.
+            _state.update {
+                val hadFactor = if (it.useRecoveryCode) it.recoveryCode.isNotBlank() else it.code.isNotBlank()
+                it.copy(
+                    submitting = false,
+                    totpRequired = true,
+                    error = if (hadFactor) LoginError.BAD_CODE else null,
+                )
+            }
+
+        LoginResult.InvalidCredentials ->
+            _state.update { it.copy(submitting = false, error = LoginError.INVALID_CREDENTIALS) }
+
+        LoginResult.RateLimited ->
+            _state.update { it.copy(submitting = false, error = LoginError.RATE_LIMITED) }
+
+        LoginResult.ServerError ->
+            _state.update { it.copy(submitting = false, error = LoginError.SERVER) }
+
+        LoginResult.NetworkError ->
+            _state.update { it.copy(submitting = false, error = LoginError.NETWORK) }
+    }
+}

app/src/main/java/com/runicgateway/app/ui/auth/RecoveryCodesScreen.kt

@@ -0,0 +1,153 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.ui.auth
+
+import android.content.Intent
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.rememberScrollState
+import androidx.compose.foundation.text.KeyboardOptions
+import androidx.compose.foundation.verticalScroll
+import androidx.compose.material3.Button
+import androidx.compose.material3.Card
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.OutlinedButton
+import androidx.compose.material3.OutlinedTextField
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.saveable.rememberSaveable
+import androidx.compose.runtime.setValue
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.platform.LocalClipboardManager
+import androidx.compose.ui.platform.LocalContext
+import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.text.AnnotatedString
+import androidx.compose.ui.text.font.FontFamily
+import androidx.compose.ui.text.input.KeyboardType
+import androidx.compose.ui.text.input.PasswordVisualTransformation
+import androidx.compose.ui.unit.dp
+import androidx.hilt.navigation.compose.hiltViewModel
+import androidx.lifecycle.compose.collectAsStateWithLifecycle
+import com.runicgateway.app.R
+import com.runicgateway.app.ui.UiState
+
+/**
+ * Account → Recovery Codes (TRUSTED_DEVICES_MFA.md): shows the remaining count and a
+ * password-stepped regenerate that reveals a fresh single-use batch **once**. The
+ * codes are shown only in memory — copy or share them before leaving; they are never
+ * stored on the device.
+ */
+@Composable
+fun RecoveryCodesScreen(
+    modifier: Modifier = Modifier,
+    viewModel: RecoveryCodesViewModel = hiltViewModel(),
+) {
+    val state by viewModel.state.collectAsStateWithLifecycle()
+    var currentPassword by rememberSaveable { mutableStateOf("") }
+
+    Column(
+        modifier = modifier
+            .fillMaxSize()
+            .verticalScroll(rememberScrollState())
+            .padding(16.dp),
+    ) {
+        Text(stringResource(R.string.recovery_codes_title), style = MaterialTheme.typography.titleLarge)
+        Text(
+            stringResource(R.string.recovery_codes_subtitle),
+            style = MaterialTheme.typography.bodyMedium,
+            color = MaterialTheme.colorScheme.onSurfaceVariant,
+            modifier = Modifier.padding(top = 4.dp),
+        )
+
+        val remainingText = when (val r = state.remaining) {
+            is UiState.Success -> stringResource(R.string.recovery_codes_remaining, r.data)
+            is UiState.Error -> stringResource(R.string.recovery_codes_remaining_unknown)
+            UiState.Loading -> stringResource(R.string.recovery_codes_remaining_loading)
+        }
+        Text(remainingText, style = MaterialTheme.typography.bodyLarge, modifier = Modifier.padding(top = 16.dp))
+
+        state.freshCodes?.let { codes ->
+            RecoveryCodesShowOnceCard(codes, onDismiss = { viewModel.dismissFreshCodes(); currentPassword = "" })
+        }
+
+        OutlinedTextField(
+            value = currentPassword,
+            onValueChange = { currentPassword = it },
+            singleLine = true,
+            enabled = !state.busy,
+            label = { Text(stringResource(R.string.account_password_current)) },
+            supportingText = { Text(stringResource(R.string.recovery_codes_password_hint)) },
+            visualTransformation = PasswordVisualTransformation(),
+            keyboardOptions = KeyboardOptions(keyboardType = KeyboardType.Password),
+            modifier = Modifier.fillMaxWidth().padding(top = 20.dp),
+        )
+
+        state.error?.let { err ->
+            Text(
+                text = stringResource(err),
+                color = MaterialTheme.colorScheme.error,
+                style = MaterialTheme.typography.bodyMedium,
+                modifier = Modifier.padding(top = 12.dp),
+            )
+        }
+
+        Button(
+            onClick = { viewModel.regenerate(currentPassword) },
+            enabled = !state.busy,
+            modifier = Modifier.fillMaxWidth().padding(top = 16.dp),
+        ) { Text(stringResource(R.string.recovery_codes_regenerate)) }
+    }
+}
+
+/**
+ * A show-once display of a freshly generated recovery-code batch, with copy/share and
+ * a dismiss. Shared by this screen and the "2FA just enabled" surface on AccountScreen.
+ */
+@Composable
+fun RecoveryCodesShowOnceCard(codes: List<String>, onDismiss: () -> Unit) {
+    val context = LocalContext.current
+    val clipboard = LocalClipboardManager.current
+    val joined = remember(codes) { codes.joinToString("\n") }
+
+    Card(Modifier.fillMaxWidth().padding(top = 16.dp)) {
+        Column(Modifier.padding(16.dp)) {
+            Text(stringResource(R.string.recovery_codes_new_title), style = MaterialTheme.typography.titleMedium)
+            Text(
+                stringResource(R.string.recovery_codes_new_hint),
+                style = MaterialTheme.typography.bodySmall,
+                color = MaterialTheme.colorScheme.onSurfaceVariant,
+                modifier = Modifier.padding(top = 4.dp),
+            )
+            codes.forEach { code ->
+                Text(
+                    code,
+                    style = MaterialTheme.typography.bodyLarge.copy(fontFamily = FontFamily.Monospace),
+                    modifier = Modifier.padding(top = 8.dp),
+                )
+            }
+            Row(Modifier.fillMaxWidth().padding(top = 16.dp), horizontalArrangement = Arrangement.spacedBy(8.dp)) {
+                OutlinedButton(
+                    onClick = { clipboard.setText(AnnotatedString(joined)) },
+                ) { Text(stringResource(R.string.recovery_codes_copy)) }
+                OutlinedButton(
+                    onClick = {
+                        val send = Intent(Intent.ACTION_SEND).apply {
+                            type = "text/plain"
+                            putExtra(Intent.EXTRA_TEXT, joined)
+                        }
+                        context.startActivity(Intent.createChooser(send, null))
+                    },
+                ) { Text(stringResource(R.string.recovery_codes_share)) }
+                Button(onClick = onDismiss) { Text(stringResource(R.string.recovery_codes_done)) }
+            }
+        }
+    }
+}

app/src/main/java/com/runicgateway/app/ui/auth/RecoveryCodesViewModel.kt

@@ -0,0 +1,84 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.ui.auth
+
+import androidx.annotation.StringRes
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.viewModelScope
+import com.runicgateway.app.R
+import com.runicgateway.app.core.result.ApiResult
+import com.runicgateway.app.data.repository.AccountRepository
+import com.runicgateway.app.ui.UiState
+import com.runicgateway.app.ui.toUiState
+import dagger.hilt.android.lifecycle.HiltViewModel
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.StateFlow
+import kotlinx.coroutines.flow.asStateFlow
+import kotlinx.coroutines.flow.update
+import kotlinx.coroutines.launch
+import javax.inject.Inject
+
+/**
+ * Drives Account → Recovery Codes (TRUSTED_DEVICES_MFA.md): the remaining-count
+ * status and a password-stepped regenerate that surfaces a fresh single-use batch
+ * **once** (never persisted). The freshly generated codes live only in memory until
+ * the user leaves the screen or dismisses them.
+ */
+@HiltViewModel
+class RecoveryCodesViewModel @Inject constructor(
+    private val accountRepository: AccountRepository,
+) : ViewModel() {
+
+    data class State(
+        /** Remaining unused codes (the status endpoint). */
+        val remaining: UiState<Int> = UiState.Loading,
+        /** A just-generated batch to show once, or null. Cleared on dismiss/leave. */
+        val freshCodes: List<String>? = null,
+        val busy: Boolean = false,
+        @param:StringRes val error: Int? = null,
+    )
+
+    private val _state = MutableStateFlow(State())
+    val state: StateFlow<State> = _state.asStateFlow()
+
+    init {
+        load()
+    }
+
+    fun load() {
+        _state.update { it.copy(remaining = UiState.Loading) }
+        viewModelScope.launch {
+            _state.update { it.copy(remaining = accountRepository.recoveryCodesStatus().toUiState().map { s -> s.remaining }) }
+        }
+    }
+
+    /** Regenerate the codes; [currentPassword] is required for accounts that have one. */
+    fun regenerate(currentPassword: String?) {
+        if (_state.value.busy) return
+        _state.update { it.copy(busy = true, error = null, freshCodes = null) }
+        viewModelScope.launch {
+            when (val result = accountRepository.generateRecoveryCodes(currentPassword?.takeIf { it.isNotBlank() })) {
+                is ApiResult.Ok -> {
+                    _state.update { it.copy(busy = false, freshCodes = result.data.recoveryCodes) }
+                    // Refresh the remaining count to reflect the new batch.
+                    _state.update { it.copy(remaining = accountRepository.recoveryCodesStatus().toUiState().map { s -> s.remaining }) }
+                }
+                is ApiResult.HttpError ->
+                    _state.update { it.copy(busy = false, error = R.string.recovery_codes_error) }
+                is ApiResult.NetworkError ->
+                    _state.update { it.copy(busy = false, error = R.string.error_network) }
+            }
+        }
+    }
+
+    /** Drop the shown-once batch from memory (user saved them / navigated away). */
+    fun dismissFreshCodes() = _state.update { it.copy(freshCodes = null) }
+}
+
+/** Map an [UiState] success value (local helper mirroring ApiResult.map). */
+private inline fun <T, R> UiState<T>.map(transform: (T) -> R): UiState<R> = when (this) {
+    is UiState.Success -> UiState.Success(transform(data))
+    is UiState.Loading -> UiState.Loading
+    is UiState.Error -> this
+}

app/src/main/java/com/runicgateway/app/ui/auth/TrustedDevicesScreen.kt

@@ -0,0 +1,136 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.ui.auth
+
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.rememberScrollState
+import androidx.compose.foundation.verticalScroll
+import androidx.compose.material3.Button
+import androidx.compose.material3.Card
+import androidx.compose.material3.HorizontalDivider
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.OutlinedButton
+import androidx.compose.material3.Text
+import androidx.compose.material3.TextButton
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.getValue
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.unit.dp
+import androidx.hilt.navigation.compose.hiltViewModel
+import androidx.lifecycle.compose.collectAsStateWithLifecycle
+import com.runicgateway.app.R
+import com.runicgateway.app.data.api.dto.TrustedDeviceDto
+import com.runicgateway.app.ui.UiState
+import com.runicgateway.app.ui.components.ErrorView
+import com.runicgateway.app.ui.components.LoadingView
+
+/**
+ * Account → Trusted Devices (TRUSTED_DEVICES_MFA.md): the devices allowed to skip
+ * the TOTP step at login. Trust the current device, revoke one, or untrust all. The
+ * server re-checks ownership on every call; this screen just renders the outcomes.
+ */
+@Composable
+fun TrustedDevicesScreen(
+    modifier: Modifier = Modifier,
+    viewModel: TrustedDevicesViewModel = hiltViewModel(),
+) {
+    val state by viewModel.state.collectAsStateWithLifecycle()
+
+    Column(
+        modifier = modifier
+            .fillMaxSize()
+            .verticalScroll(rememberScrollState())
+            .padding(16.dp),
+    ) {
+        Text(
+            stringResource(R.string.trusted_devices_title),
+            style = MaterialTheme.typography.titleLarge,
+        )
+        Text(
+            stringResource(R.string.trusted_devices_subtitle),
+            style = MaterialTheme.typography.bodyMedium,
+            color = MaterialTheme.colorScheme.onSurfaceVariant,
+            modifier = Modifier.padding(top = 4.dp),
+        )
+
+        state.feedback?.let { fb ->
+            Text(
+                text = stringResource(fb.messageRes),
+                color = if (fb.ok) MaterialTheme.colorScheme.primary else MaterialTheme.colorScheme.error,
+                style = MaterialTheme.typography.bodyMedium,
+                modifier = Modifier.padding(top = 12.dp),
+            )
+        }
+
+        when (val devices = state.devices) {
+            is UiState.Loading -> LoadingView(Modifier.padding(top = 32.dp))
+            is UiState.Error -> ErrorView(devices.kind, onRetry = viewModel::load, modifier = Modifier.padding(top = 32.dp))
+            is UiState.Success -> {
+                if (devices.data.isEmpty()) {
+                    Text(
+                        stringResource(R.string.trusted_devices_empty),
+                        style = MaterialTheme.typography.bodyMedium,
+                        color = MaterialTheme.colorScheme.onSurfaceVariant,
+                        modifier = Modifier.padding(top = 24.dp),
+                    )
+                } else {
+                    devices.data.forEach { device ->
+                        TrustedDeviceRow(device, state.busy, onRevoke = { viewModel.revoke(device.id) })
+                    }
+                }
+
+                HorizontalDivider(Modifier.padding(vertical = 20.dp))
+
+                Button(
+                    onClick = viewModel::trustThisDevice,
+                    enabled = !state.busy,
+                    modifier = Modifier.fillMaxWidth(),
+                ) { Text(stringResource(R.string.trusted_devices_trust_this)) }
+
+                if (devices.data.isNotEmpty()) {
+                    OutlinedButton(
+                        onClick = viewModel::revokeAll,
+                        enabled = !state.busy,
+                        modifier = Modifier.fillMaxWidth().padding(top = 8.dp),
+                    ) { Text(stringResource(R.string.trusted_devices_untrust_all)) }
+                }
+            }
+        }
+    }
+}
+
+@Composable
+private fun TrustedDeviceRow(device: TrustedDeviceDto, busy: Boolean, onRevoke: () -> Unit) {
+    Card(Modifier.fillMaxWidth().padding(top = 12.dp)) {
+        Row(
+            Modifier.fillMaxWidth().padding(16.dp),
+            verticalAlignment = Alignment.CenterVertically,
+        ) {
+            Column(Modifier.weight(1f)) {
+                Text(
+                    text = device.deviceName?.takeIf { it.isNotBlank() }
+                        ?: device.platform?.replaceFirstChar { it.uppercase() }
+                        ?: stringResource(R.string.trusted_devices_unknown),
+                    style = MaterialTheme.typography.bodyLarge,
+                )
+                device.lastUsedAt?.let {
+                    Text(
+                        stringResource(R.string.trusted_devices_last_used, it),
+                        style = MaterialTheme.typography.bodySmall,
+                        color = MaterialTheme.colorScheme.onSurfaceVariant,
+                    )
+                }
+            }
+            TextButton(onClick = onRevoke, enabled = !busy) {
+                Text(stringResource(R.string.trusted_devices_revoke))
+            }
+        }
+    }
+}

app/src/main/java/com/runicgateway/app/ui/auth/TrustedDevicesViewModel.kt

@@ -0,0 +1,125 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.ui.auth
+
+import androidx.annotation.StringRes
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.viewModelScope
+import com.runicgateway.app.R
+import com.runicgateway.app.core.auth.DeviceNameProvider
+import com.runicgateway.app.core.result.ApiResult
+import com.runicgateway.app.data.api.dto.TrustedDeviceDto
+import com.runicgateway.app.data.repository.AccountRepository
+import com.runicgateway.app.data.repository.AccountRepository.TrustOutcome
+import com.runicgateway.app.data.repository.AuthRepository
+import com.runicgateway.app.ui.UiState
+import com.runicgateway.app.ui.toUiState
+import dagger.hilt.android.lifecycle.HiltViewModel
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.StateFlow
+import kotlinx.coroutines.flow.asStateFlow
+import kotlinx.coroutines.flow.update
+import kotlinx.coroutines.launch
+import javax.inject.Inject
+
+/**
+ * Drives the Trusted Devices screen (TRUSTED_DEVICES_MFA.md): list the devices
+ * allowed to skip the TOTP step, trust the current one (persisting the returned
+ * token via [AuthRepository]), revoke one, and untrust all. The trust action folds
+ * the `409` cap into a first-class [Feedback] telling the user to revoke one first.
+ */
+@HiltViewModel
+class TrustedDevicesViewModel @Inject constructor(
+    private val accountRepository: AccountRepository,
+    private val authRepository: AuthRepository,
+    private val sessionManager: com.runicgateway.app.core.auth.SessionManager,
+    private val deviceNameProvider: DeviceNameProvider,
+) : ViewModel() {
+
+    /** A one-shot result banner shown above the list. */
+    data class Feedback(val ok: Boolean, @param:StringRes val messageRes: Int)
+
+    data class State(
+        val devices: UiState<List<TrustedDeviceDto>> = UiState.Loading,
+        val busy: Boolean = false,
+        val feedback: Feedback? = null,
+    )
+
+    private val _state = MutableStateFlow(State())
+    val state: StateFlow<State> = _state.asStateFlow()
+
+    init {
+        load()
+    }
+
+    fun load() {
+        _state.update { it.copy(devices = UiState.Loading) }
+        viewModelScope.launch {
+            _state.update { it.copy(devices = accountRepository.trustedDevices().toUiState()) }
+        }
+    }
+
+    /** Trust the current device; persist the returned token so future logins skip 2FA. */
+    fun trustThisDevice() {
+        if (_state.value.busy) return
+        _state.update { it.copy(busy = true, feedback = null) }
+        viewModelScope.launch {
+            when (val outcome = accountRepository.trustThisDevice(deviceNameProvider.deviceName())) {
+                is TrustOutcome.Trusted -> {
+                    // Bind the fresh token to the signed-in username (mirrors the login path).
+                    val username = sessionManager.state.value.let {
+                        (it as? com.runicgateway.app.core.auth.Session.SignedIn)?.user?.username
+                    }
+                    if (outcome.trustToken != null && username != null) {
+                        authRepository.saveTrustToken(username, outcome.trustToken)
+                    }
+                    finish(true, R.string.trusted_devices_trusted)
+                    reload()
+                }
+                is TrustOutcome.LimitReached -> finish(false, R.string.trusted_devices_limit)
+                TrustOutcome.NetworkError -> finish(false, R.string.error_network)
+                TrustOutcome.ServerError -> finish(false, R.string.trusted_devices_error)
+            }
+        }
+    }
+
+    fun revoke(id: Long) {
+        if (_state.value.busy) return
+        _state.update { it.copy(busy = true, feedback = null) }
+        viewModelScope.launch {
+            when (accountRepository.revokeTrustedDevice(id)) {
+                is ApiResult.Ok -> {
+                    finish(true, R.string.trusted_devices_revoked)
+                    reload()
+                }
+                else -> finish(false, R.string.trusted_devices_error)
+            }
+        }
+    }
+
+    fun revokeAll() {
+        if (_state.value.busy) return
+        _state.update { it.copy(busy = true, feedback = null) }
+        viewModelScope.launch {
+            when (accountRepository.revokeAllTrustedDevices()) {
+                is ApiResult.Ok -> {
+                    // Every device is untrusted now, including this one — drop the local token.
+                    authRepository.clearTrustToken()
+                    finish(true, R.string.trusted_devices_revoked_all)
+                    reload()
+                }
+                else -> finish(false, R.string.trusted_devices_error)
+            }
+        }
+    }
+
+    fun clearFeedback() = _state.update { it.copy(feedback = null) }
+
+    private suspend fun reload() {
+        _state.update { it.copy(devices = accountRepository.trustedDevices().toUiState()) }
+    }
+
+    private fun finish(ok: Boolean, @StringRes messageRes: Int) =
+        _state.update { it.copy(busy = false, feedback = Feedback(ok, messageRes)) }
+}

app/src/main/java/com/runicgateway/app/ui/components/ThemeComponents.kt

@@ -0,0 +1,148 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.ui.components
+
+import androidx.compose.foundation.background
+import androidx.compose.foundation.border
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.ColumnScope
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.height
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.size
+import androidx.compose.foundation.shape.CircleShape
+import androidx.compose.foundation.shape.RoundedCornerShape
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Surface
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.draw.clip
+import androidx.compose.ui.graphics.Brush
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.unit.dp
+import com.runicgateway.app.ui.theme.ShardCardBottom
+import com.runicgateway.app.ui.theme.ShardCardTop
+import com.runicgateway.app.ui.theme.ShardDanger
+import com.runicgateway.app.ui.theme.ShardDangerBg
+import com.runicgateway.app.ui.theme.ShardElevated
+import com.runicgateway.app.ui.theme.ShardFaint
+import com.runicgateway.app.ui.theme.ShardOutline
+import com.runicgateway.app.ui.theme.ShardPillBg
+import com.runicgateway.app.ui.theme.ShardPillFg
+import com.runicgateway.app.ui.theme.ShardSuccess
+import com.runicgateway.app.ui.theme.ShardSuccessBg
+import com.runicgateway.app.ui.theme.ShardSuccessDot
+import com.runicgateway.app.ui.theme.ShardWarning
+import com.runicgateway.app.ui.theme.ShardWarningBg
+
+/**
+ * Shared visual building blocks for the M5 shard-website design pass
+ * (docs/android/PLAN.md §M5): the recurring pill, section-label, feature-card,
+ * and stat-bar motifs the mockup repeats across screens. Pure presentation —
+ * no state, no data dependencies — so any screen can adopt them.
+ */
+
+/** Semantic tone for a [StatusPill] / [OnlineDot]. */
+enum class PillTone { Success, Warning, Danger, Neutral, Info }
+
+private data class PillColors(val fg: Color, val bg: Color)
+
+private fun toneColors(tone: PillTone): PillColors = when (tone) {
+    PillTone.Success -> PillColors(ShardSuccess, ShardSuccessBg)
+    PillTone.Warning -> PillColors(ShardWarning, ShardWarningBg)
+    PillTone.Danger -> PillColors(ShardDanger, ShardDangerBg)
+    PillTone.Neutral, PillTone.Info -> PillColors(ShardPillFg, ShardPillBg)
+}
+
+/**
+ * A small uppercase status chip — "Live", "Up", "Enabled", "IDOC", a role — with a
+ * rounded filled background tinted by [tone]. Mirrors the mockup's pill badges.
+ */
+@Composable
+fun StatusPill(text: String, tone: PillTone, modifier: Modifier = Modifier) {
+    val c = toneColors(tone)
+    Surface(color = c.bg, shape = CircleShape, modifier = modifier) {
+        Text(
+            text = text.uppercase(),
+            style = MaterialTheme.typography.labelSmall,
+            color = c.fg,
+            modifier = Modifier.padding(horizontal = 10.dp, vertical = 4.dp),
+        )
+    }
+}
+
+/** The small colored status dot (green when live), matched to a [PillTone]. */
+@Composable
+fun OnlineDot(tone: PillTone, modifier: Modifier = Modifier) {
+    val color = when (tone) {
+        PillTone.Success -> ShardSuccessDot
+        PillTone.Warning -> ShardWarning
+        PillTone.Danger -> ShardDanger
+        PillTone.Neutral, PillTone.Info -> ShardFaint
+    }
+    Box(modifier.size(8.dp).clip(CircleShape).background(color))
+}
+
+/**
+ * The muted, uppercase, letter-spaced section header the design uses above grouped
+ * content ("Attributes", "Vitals", "Password", "Linked accounts").
+ */
+@Composable
+fun SectionLabel(text: String, modifier: Modifier = Modifier) {
+    Text(
+        text = text.uppercase(),
+        style = MaterialTheme.typography.labelSmall,
+        color = ShardFaint,
+        modifier = modifier,
+    )
+}
+
+/**
+ * The elevated "feature" card: a vertical blue gradient with a hairline outline and
+ * soft shadow, used for the home status card, the shard-online banner, and the
+ * vendor card. [content] is laid out in a padded [Column].
+ */
+@Composable
+fun FeatureCard(
+    modifier: Modifier = Modifier,
+    contentPadding: Int = 18,
+    content: @Composable ColumnScope.() -> Unit,
+) {
+    Box(
+        modifier = modifier
+            .fillMaxWidth()
+            .clip(RoundedCornerShape(12.dp))
+            .background(Brush.verticalGradient(listOf(ShardCardTop, ShardCardBottom)))
+            .border(1.dp, ShardOutline, RoundedCornerShape(12.dp)),
+    ) {
+        Column(Modifier.padding(contentPadding.dp), content = content)
+    }
+}
+
+/**
+ * A slim rounded meter (vitals / skills). [fraction] is clamped to 0..1; the fill is
+ * the slate accent over a bordered dark track.
+ */
+@Composable
+fun StatBar(fraction: Float, modifier: Modifier = Modifier) {
+    val pct = fraction.coerceIn(0f, 1f)
+    Box(
+        modifier = modifier
+            .fillMaxWidth()
+            .height(6.dp)
+            .clip(RoundedCornerShape(3.dp))
+            .background(ShardElevated)
+            .border(1.dp, ShardOutline, RoundedCornerShape(3.dp)),
+    ) {
+        Box(
+            Modifier
+                .fillMaxWidth(pct)
+                .height(6.dp)
+                .clip(RoundedCornerShape(3.dp))
+                .background(MaterialTheme.colorScheme.secondary),
+        )
+    }
+}

app/src/main/java/com/runicgateway/app/ui/connect/ConnectScreen.kt

@@ -107,6 +107,7 @@ private fun errorMessage(error: ConnectError): String = when (error) {
     ConnectError.UnsupportedScheme -> stringResource(R.string.connect_error_scheme)
     ConnectError.Insecure -> stringResource(R.string.connect_error_insecure)
     ConnectError.NotRunicGateway -> stringResource(R.string.connect_error_not_runic)
+    is ConnectError.VersionMismatch -> stringResource(R.string.connect_error_version, error.serverApi)
     ConnectError.Unreachable -> stringResource(R.string.connect_error_unreachable)
     is ConnectError.Server -> stringResource(R.string.connect_error_server, error.status)
 }

app/src/main/java/com/runicgateway/app/ui/connect/ConnectViewModel.kt

@@ -32,6 +32,7 @@ class ConnectViewModel @Inject constructor(
         data object UnsupportedScheme : ConnectError
         data object Insecure : ConnectError
         data object NotRunicGateway : ConnectError
+        data class VersionMismatch(val serverApi: String) : ConnectError
         data object Unreachable : ConnectError
         data class Server(val status: Int) : ConnectError
     }
@@ -61,6 +62,7 @@ class ConnectViewModel @Inject constructor(
                 }
                 is ProbeResult.InvalidUrl -> fail(result.reason.toError())
                 ProbeResult.NotRunicGateway -> fail(ConnectError.NotRunicGateway)
+                is ProbeResult.VersionMismatch -> fail(ConnectError.VersionMismatch(result.serverApi))
                 is ProbeResult.Unreachable -> fail(ConnectError.Unreachable)
                 is ProbeResult.ServerError -> fail(ConnectError.Server(result.status))
             }

app/src/main/java/com/runicgateway/app/ui/home/HomeScreen.kt

@@ -4,19 +4,19 @@
 package com.runicgateway.app.ui.home
 
 import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
 import androidx.compose.foundation.layout.Spacer
 import androidx.compose.foundation.layout.fillMaxSize
-import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.height
 import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.width
 import androidx.compose.foundation.rememberScrollState
 import androidx.compose.foundation.verticalScroll
-import androidx.compose.material3.Card
-import androidx.compose.material3.CardDefaults
 import androidx.compose.material3.MaterialTheme
 import androidx.compose.material3.Text
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.getValue
+import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.unit.dp
@@ -27,7 +27,10 @@ import com.runicgateway.app.data.api.dto.BrandDto
 import com.runicgateway.app.data.api.dto.StatusDto
 import com.runicgateway.app.ui.UiState
 import com.runicgateway.app.ui.components.ErrorView
+import com.runicgateway.app.ui.components.FeatureCard
 import com.runicgateway.app.ui.components.LoadingView
+import com.runicgateway.app.ui.components.OnlineDot
+import com.runicgateway.app.ui.components.PillTone
 
 /**
  * Home / status (PLAN.md §6.1): the shard's name + tagline from branding, and a
@@ -83,40 +86,37 @@ private fun HomeContent(brand: BrandDto?, status: StatusDto, modifier: Modifier
 @Composable
 private fun StatusCard(status: StatusDto) {
     val online = !status.isMaintenance
-    val containerColor =
-        if (online) MaterialTheme.colorScheme.secondaryContainer
-        else MaterialTheme.colorScheme.errorContainer
 
-    Card(
-        modifier = Modifier.fillMaxWidth(),
-        colors = CardDefaults.cardColors(containerColor = containerColor),
-    ) {
-        Column(Modifier.padding(16.dp)) {
+    FeatureCard {
+        Row(verticalAlignment = Alignment.CenterVertically) {
+            OnlineDot(if (online) PillTone.Success else PillTone.Danger)
+            Spacer(Modifier.width(10.dp))
             Text(
                 text = stringResource(
                     if (online) R.string.home_status_live else R.string.home_status_maintenance,
                 ),
-                style = MaterialTheme.typography.titleLarge,
+                style = MaterialTheme.typography.titleMedium,
+                color = MaterialTheme.colorScheme.onSurface,
+            )
+        }
+        if (status.isMaintenance && status.statusMessage.isNotBlank()) {
+            Text(
+                text = status.statusMessage,
+                style = MaterialTheme.typography.bodyMedium,
+                modifier = Modifier.padding(top = 6.dp),
+            )
+        }
+        if (status.version.server.isNotBlank()) {
+            Text(
+                text = stringResource(
+                    R.string.home_server_version,
+                    status.version.server,
+                    status.version.api,
+                ),
+                style = MaterialTheme.typography.labelMedium,
+                color = MaterialTheme.colorScheme.onSurfaceVariant,
+                modifier = Modifier.padding(top = 10.dp),
             )
-            if (status.isMaintenance && status.statusMessage.isNotBlank()) {
-                Text(
-                    text = status.statusMessage,
-                    style = MaterialTheme.typography.bodyMedium,
-                    modifier = Modifier.padding(top = 6.dp),
-                )
-            }
-            if (status.version.server.isNotBlank()) {
-                Text(
-                    text = stringResource(
-                        R.string.home_server_version,
-                        status.version.server,
-                        status.version.api,
-                    ),
-                    style = MaterialTheme.typography.labelMedium,
-                    color = MaterialTheme.colorScheme.onSurfaceVariant,
-                    modifier = Modifier.padding(top = 10.dp),
-                )
-            }
         }
     }
 }

app/src/main/java/com/runicgateway/app/ui/navigation/Menu.kt

@@ -0,0 +1,82 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.ui.navigation
+
+import androidx.annotation.StringRes
+import com.runicgateway.app.R
+import com.runicgateway.app.core.auth.Session
+
+/**
+ * One shared, declarative, access-level navigation definition (PLAN.md §5): a
+ * single list where each entry declares the minimum access it needs, filtered by
+ * the current session — not a pile of `if role ==` checks. The server stays the
+ * source of truth; a hidden item is a UX convenience and every gated call still
+ * enforces on the backend.
+ */
+enum class MenuAccess {
+    /** Visible to everyone, signed in or not. */
+    PUBLIC,
+
+    /** Visible to any signed-in account (§5, "My Account"). */
+    SIGNED_IN,
+
+    /**
+     * The linked game-data groups (§6.3). Visible to any player **or** staff:
+     * staff are a superset of players (all player abilities plus their staff
+     * tools), and the backend's player self-service surface is role-agnostic, so
+     * a signed-in admin/editor/moderator sees + uses their own characters too.
+     */
+    PLAYER,
+
+    /** Visible to any staff role (admin/editor/moderator) — the M10 staff surface (§1). */
+    STAFF,
+
+    /** Visible to admin/moderator — moderation actions + the support queue (§1, M10). */
+    MODERATOR,
+}
+
+data class MenuEntry(
+    val route: String,
+    @param:StringRes val labelRes: Int,
+    val access: MenuAccess = MenuAccess.PUBLIC,
+)
+
+/**
+ * The full menu, in display order. Public content first, then the signed-in
+ * surfaces, then the player-only game-data groups (revealed once the session's
+ * role is `player`, §6.3).
+ */
+val APP_MENU: List<MenuEntry> = listOf(
+    MenuEntry(Routes.HOME, R.string.menu_home),
+    MenuEntry(Routes.NEWS, R.string.menu_news),
+    MenuEntry(Routes.WIKI, R.string.menu_wiki),
+    MenuEntry(Routes.SHARD, R.string.menu_shard),
+    MenuEntry(Routes.page("about"), R.string.menu_about),
+    MenuEntry(Routes.CONTACT, R.string.menu_contact),
+    MenuEntry(Routes.ACCOUNT, R.string.menu_account, MenuAccess.SIGNED_IN),
+    MenuEntry(Routes.NOTIFICATIONS, R.string.menu_notifications, MenuAccess.SIGNED_IN),
+    MenuEntry(Routes.PLAYER_CHARACTERS, R.string.menu_my_characters, MenuAccess.PLAYER),
+    MenuEntry(Routes.PLAYER_VENDORS, R.string.menu_my_vendors, MenuAccess.PLAYER),
+    MenuEntry(Routes.PLAYER_HOUSES, R.string.menu_my_houses, MenuAccess.PLAYER),
+    // Staff operations (§1, M10) — revealed for staff roles; the backend re-checks every call.
+    MenuEntry(Routes.ADMIN_DASHBOARD, R.string.menu_admin_dashboard, MenuAccess.STAFF),
+    MenuEntry(Routes.ADMIN_CONTENT, R.string.menu_admin_content, MenuAccess.STAFF),
+    MenuEntry(Routes.ADMIN_MODERATION, R.string.menu_admin_moderation, MenuAccess.MODERATOR),
+    MenuEntry(Routes.ADMIN_SUPPORT, R.string.menu_admin_support, MenuAccess.MODERATOR),
+)
+
+/**
+ * The entries the given [session] may see. Pure + side-effect-free so the access
+ * gating is unit-tested without Compose.
+ */
+fun visibleEntries(entries: List<MenuEntry>, session: Session): List<MenuEntry> =
+    entries.filter { entry ->
+        when (entry.access) {
+            MenuAccess.PUBLIC -> true
+            MenuAccess.SIGNED_IN -> session is Session.SignedIn
+            MenuAccess.PLAYER -> session is Session.SignedIn && (session.user.isPlayer || session.user.isStaff)
+            MenuAccess.STAFF -> session is Session.SignedIn && session.user.isStaff
+            MenuAccess.MODERATOR -> session is Session.SignedIn && session.user.isModerator
+        }
+    }

app/src/main/java/com/runicgateway/app/ui/navigation/Routes.kt

@@ -14,6 +14,41 @@ object Routes {
     const val WIKI = "wiki"
     const val CONTACT = "contact"
 
+    /** Native login (§4.1) and the signed-in account surface (§5). */
+    const val LOGIN = "login"
+    const val ACCOUNT = "account"
+
+    /** MFA management, reached from Account (TRUSTED_DEVICES_MFA.md). Signed-in only. */
+    const val ACCOUNT_TRUSTED_DEVICES = "account/trusted-devices"
+    const val ACCOUNT_RECOVERY_CODES = "account/recovery-codes"
+
+    /** Opt-in push notification settings (§11, signed-in). */
+    const val NOTIFICATIONS = "notifications"
+
+    /** Public shard hub (§6.2). */
+    const val SHARD = "shard"
+
+    /** Shard boards, reachable from the hub. */
+    const val SHARD_CHAMPS = "shard/champs"
+    const val SHARD_GUILDS = "shard/guilds"
+    const val SHARD_GOVERNORS = "shard/governors"
+    const val SHARD_HOUSES = "shard/houses"
+
+    /** Player game-data groups (§6.3, player-only). Distinct from the public shard boards. */
+    const val PLAYER_CHARACTERS = "player/characters"
+    const val PLAYER_VENDORS = "player/vendors"
+    const val PLAYER_HOUSES = "player/houses"
+
+    /** A single character sheet by in-game (hex) serial. */
+    const val PLAYER_CHAR = "player/char/{serial}"
+
+    /** Staff operations (§1, §6.4, M10). Gated to staff roles by the menu access level;
+     *  the backend re-checks role on every `/admin/…` call. */
+    const val ADMIN_DASHBOARD = "admin/dashboard"
+    const val ADMIN_MODERATION = "admin/moderation"
+    const val ADMIN_SUPPORT = "admin/support"
+    const val ADMIN_CONTENT = "admin/content"
+
     /** CMS page by slug (e.g. the conventional "about" page, mirrored from the site nav). */
     const val PAGE = "page/{slug}"
 
@@ -27,9 +62,32 @@ object Routes {
         const val SLUG = "slug"
         const val CATEGORY = "category"
         const val ID_OR_SLUG = "idOrSlug"
+        const val SERIAL = "serial"
     }
 
     fun page(slug: String) = "page/$slug"
     fun post(categoryUrlSlug: String, idOrSlug: String) = "news/$categoryUrlSlug/$idOrSlug"
     fun wikiPage(slug: String) = "wiki/$slug"
+
+    /** The character-sheet route for an in-game serial (e.g. "0x24C"). */
+    fun playerChar(serial: String) = "player/char/$serial"
+
+    /**
+     * The in-app destination a tapped push notification deep-links to (§11, M7
+     * Part 2 work item 7). Maps a stream id to the screen that shows its content;
+     * unknown streams land on Home. Personal streams route to the player groups
+     * (a signed-out/demoted tap is caught by [com.runicgateway.app.ui.PlayerGate]).
+     */
+    fun forStream(streamId: String): String = when (streamId) {
+        com.runicgateway.app.core.push.PushStreams.NEWS_POST -> NEWS
+        com.runicgateway.app.core.push.PushStreams.SERVER_STATUS,
+        com.runicgateway.app.core.push.PushStreams.CHAMP_START,
+        com.runicgateway.app.core.push.PushStreams.IDOC_WARNING,
+        com.runicgateway.app.core.push.PushStreams.GOVERNOR_ELECTION,
+        -> SHARD
+        com.runicgateway.app.core.push.PushStreams.VENDOR_SALE -> PLAYER_VENDORS
+        com.runicgateway.app.core.push.PushStreams.HOUSE_IDOC -> PLAYER_HOUSES
+        com.runicgateway.app.core.push.PushStreams.ACCOUNT_LOGIN -> ACCOUNT
+        else -> HOME
+    }
 }

app/src/main/java/com/runicgateway/app/ui/notifications/NotificationsScreen.kt

@@ -0,0 +1,182 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.ui.notifications
+
+import android.Manifest
+import android.os.Build
+import androidx.activity.compose.rememberLauncherForActivityResult
+import androidx.activity.result.contract.ActivityResultContracts
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.Spacer
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.height
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.rememberScrollState
+import androidx.compose.foundation.verticalScroll
+import androidx.compose.material3.HorizontalDivider
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Switch
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.getValue
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.platform.LocalContext
+import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.text.font.FontStyle
+import androidx.compose.ui.unit.dp
+import androidx.hilt.navigation.compose.hiltViewModel
+import androidx.lifecycle.compose.collectAsStateWithLifecycle
+import com.runicgateway.app.R
+import com.runicgateway.app.data.api.dto.NotificationStreamDto
+import com.runicgateway.app.ui.UiState
+import com.runicgateway.app.ui.components.EmptyView
+import com.runicgateway.app.ui.components.ErrorView
+import com.runicgateway.app.ui.components.LoadingView
+import com.runicgateway.app.ui.components.SectionLabel
+
+/**
+ * The Notifications settings screen (PLAN.md §11, M7 Part 2 work item 6): the
+ * subscribable catalog with per-stream toggles. Personal streams are greyed until a
+ * game account is linked; turning a stream on requests the POST_NOTIFICATIONS
+ * permission (API 33+) and registers the device, turning them all off unregisters it.
+ */
+@Composable
+fun NotificationsScreen(
+    modifier: Modifier = Modifier,
+    viewModel: NotificationsViewModel = hiltViewModel(),
+) {
+    val state by viewModel.state.collectAsStateWithLifecycle()
+    val context = LocalContext.current
+
+    // Ask once for POST_NOTIFICATIONS when the user first enables a stream (API 33+).
+    val permissionLauncher = rememberLauncherForActivityResult(
+        ActivityResultContracts.RequestPermission(),
+    ) { /* granted or not, the subscription is already saved server-side */ }
+
+    fun ensureNotificationPermission() {
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU) {
+            permissionLauncher.launch(Manifest.permission.POST_NOTIFICATIONS)
+        }
+    }
+
+    Column(
+        modifier = modifier
+            .fillMaxSize()
+            .verticalScroll(rememberScrollState())
+            .padding(16.dp),
+    ) {
+        Text(
+            text = stringResource(R.string.notifications_title),
+            style = MaterialTheme.typography.titleLarge,
+        )
+        Spacer(Modifier.height(4.dp))
+        Text(
+            text = stringResource(R.string.notifications_subtitle),
+            style = MaterialTheme.typography.bodyMedium,
+            color = MaterialTheme.colorScheme.onSurfaceVariant,
+        )
+        Spacer(Modifier.height(16.dp))
+
+        if (!state.supported) {
+            EmptyView(message = stringResource(R.string.notifications_unsupported))
+            return@Column
+        }
+
+        state.feedback?.let { fb ->
+            Text(
+                text = stringResource(fb.messageRes),
+                style = MaterialTheme.typography.bodyMedium,
+                color = if (fb.ok) MaterialTheme.colorScheme.primary else MaterialTheme.colorScheme.error,
+                modifier = Modifier.padding(bottom = 12.dp),
+            )
+        }
+
+        when (val catalog = state.catalog) {
+            is UiState.Loading -> LoadingView()
+            is UiState.Error -> ErrorView(kind = catalog.kind, onRetry = viewModel::load)
+            is UiState.Success -> StreamList(
+                streams = catalog.data,
+                subscribed = state.subscribed,
+                hasLinkedAccount = state.hasLinkedAccount,
+                busy = state.busy,
+                onToggle = { stream, on ->
+                    if (on) ensureNotificationPermission()
+                    viewModel.setSubscribed(stream, on)
+                },
+            )
+        }
+    }
+}
+
+@Composable
+private fun StreamList(
+    streams: List<NotificationStreamDto>,
+    subscribed: Set<String>,
+    hasLinkedAccount: Boolean,
+    busy: Boolean,
+    onToggle: (NotificationStreamDto, Boolean) -> Unit,
+) {
+    if (streams.isEmpty()) {
+        EmptyView(message = stringResource(R.string.notifications_empty))
+        return
+    }
+    val (personal, general) = streams.partition { it.personal }
+
+    if (general.isNotEmpty()) {
+        SectionLabel(stringResource(R.string.notifications_section_general))
+        Spacer(Modifier.height(8.dp))
+        general.forEach { stream ->
+            StreamRow(stream, subscribed.contains(stream.id), enabled = !busy, hint = null) { on ->
+                onToggle(stream, on)
+            }
+            HorizontalDivider()
+        }
+        Spacer(Modifier.height(20.dp))
+    }
+
+    if (personal.isNotEmpty()) {
+        SectionLabel(stringResource(R.string.notifications_section_personal))
+        Spacer(Modifier.height(8.dp))
+        personal.forEach { stream ->
+            val selectable = streamSelectable(stream, hasLinkedAccount)
+            val hint = if (!selectable) stringResource(R.string.notifications_requires_link) else null
+            StreamRow(stream, subscribed.contains(stream.id) && selectable, enabled = !busy && selectable, hint = hint) { on ->
+                onToggle(stream, on)
+            }
+            HorizontalDivider()
+        }
+    }
+}
+
+@Composable
+private fun StreamRow(
+    stream: NotificationStreamDto,
+    checked: Boolean,
+    enabled: Boolean,
+    hint: String?,
+    onToggle: (Boolean) -> Unit,
+) {
+    Row(
+        modifier = Modifier.fillMaxWidth().padding(vertical = 12.dp),
+        verticalAlignment = Alignment.CenterVertically,
+    ) {
+        Column(modifier = Modifier.weight(1f).padding(end = 12.dp)) {
+            Text(
+                text = stream.label,
+                style = MaterialTheme.typography.bodyLarge,
+                color = if (enabled) MaterialTheme.colorScheme.onSurface else MaterialTheme.colorScheme.onSurfaceVariant,
+            )
+            Text(
+                text = hint ?: stream.description,
+                style = MaterialTheme.typography.bodySmall,
+                color = MaterialTheme.colorScheme.onSurfaceVariant,
+                fontStyle = if (hint != null) FontStyle.Italic else FontStyle.Normal,
+            )
+        }
+        Switch(checked = checked, onCheckedChange = onToggle, enabled = enabled)
+    }
+}

app/src/main/java/com/runicgateway/app/ui/notifications/NotificationsViewModel.kt

@@ -0,0 +1,135 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.ui.notifications
+
+import androidx.annotation.StringRes
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.viewModelScope
+import com.runicgateway.app.R
+import com.runicgateway.app.core.push.PushManager
+import com.runicgateway.app.core.result.ApiResult
+import com.runicgateway.app.data.api.dto.NotificationStreamDto
+import com.runicgateway.app.data.repository.NotificationsRepository
+import com.runicgateway.app.data.repository.PlayerShardRepository
+import com.runicgateway.app.ui.UiState
+import com.runicgateway.app.ui.toUiState
+import dagger.hilt.android.lifecycle.HiltViewModel
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.StateFlow
+import kotlinx.coroutines.flow.asStateFlow
+import kotlinx.coroutines.flow.update
+import kotlinx.coroutines.launch
+import javax.inject.Inject
+
+/**
+ * Drives the Notifications settings screen (PLAN.md §11, M7 Part 2 work item 6):
+ * the stream catalog with per-stream toggles bound to
+ * `GET/PUT /auth/me/notifications/subscriptions`. A **personal** stream is greyed
+ * until the user has a linked game account (§11), and turning the opt-in set
+ * non-empty/empty drives the [PushManager] to register/unregister the device.
+ */
+@HiltViewModel
+class NotificationsViewModel @Inject constructor(
+    private val notifications: NotificationsRepository,
+    private val playerShard: PlayerShardRepository,
+    private val pushManager: PushManager,
+) : ViewModel() {
+
+    data class Feedback(val ok: Boolean, @param:StringRes val messageRes: Int)
+
+    data class State(
+        val catalog: UiState<List<NotificationStreamDto>> = UiState.Loading,
+        val subscribed: Set<String> = emptySet(),
+        /** Whether the user has ≥1 linked game account — personal streams need it. */
+        val hasLinkedAccount: Boolean = false,
+        /** Whether this shard advertises a push relay at all (else the screen says so). */
+        val supported: Boolean = true,
+        val busy: Boolean = false,
+        val feedback: Feedback? = null,
+    )
+
+    private val _state = MutableStateFlow(State())
+    val state: StateFlow<State> = _state.asStateFlow()
+
+    init {
+        viewModelScope.launch {
+            pushManager.supported.collect { supported -> _state.update { it.copy(supported = supported) } }
+        }
+        load()
+    }
+
+    fun load() {
+        _state.update { it.copy(catalog = UiState.Loading) }
+        viewModelScope.launch {
+            val catalog = notifications.streams().let { result ->
+                when (result) {
+                    is ApiResult.Ok -> ApiResult.Ok(result.data.streams)
+                    is ApiResult.HttpError -> result
+                    is ApiResult.NetworkError -> result
+                }
+            }
+            _state.update { it.copy(catalog = catalog.toUiState()) }
+
+            when (val subs = notifications.subscriptions()) {
+                is ApiResult.Ok -> _state.update { it.copy(subscribed = subs.data.streams.toSet()) }
+                else -> Unit
+            }
+            // A linked game account gates the personal streams; failure → treat as none.
+            val linked = (playerShard.accounts() as? ApiResult.Ok)?.data?.isNotEmpty() == true
+            _state.update { it.copy(hasLinkedAccount = linked) }
+        }
+    }
+
+    fun clearFeedback() = _state.update { it.copy(feedback = null) }
+
+    /** Toggle [stream]; refuses a personal stream with no linked account. */
+    fun setSubscribed(stream: NotificationStreamDto, on: Boolean) {
+        val s = _state.value
+        if (s.busy) return
+        if (on && !streamSelectable(stream, s.hasLinkedAccount)) return
+        val next = if (on) s.subscribed + stream.id else s.subscribed - stream.id
+
+        _state.update { it.copy(busy = true, feedback = null) }
+        viewModelScope.launch {
+            when (val result = notifications.setSubscriptions(next.toList())) {
+                is ApiResult.Ok -> {
+                    val stored = result.data.streams.toSet()
+                    _state.update { it.copy(subscribed = stored) }
+                    reconcilePush(stored)
+                }
+                is ApiResult.NetworkError -> finish(false, R.string.error_network)
+                is ApiResult.HttpError -> finish(false, R.string.notifications_save_error)
+            }
+        }
+    }
+
+    /**
+     * Register or unregister the device to match the opted-in set (PLAN.md §11:
+     * register when signed-in + subscribed, unregister when the set empties).
+     */
+    private suspend fun reconcilePush(subscribed: Set<String>) {
+        if (subscribed.isEmpty()) {
+            pushManager.disable()
+            finish(true, R.string.notifications_all_off)
+            return
+        }
+        when (val res = pushManager.enable()) {
+            is PushManager.PushResult.Enabled -> finish(true, R.string.notifications_saved)
+            is PushManager.PushResult.Unsupported -> finish(false, R.string.notifications_unsupported)
+            is PushManager.PushResult.NotSignedIn -> finish(false, R.string.notifications_save_error)
+            is PushManager.PushResult.Failed ->
+                finish(false, if (res.status == 400) R.string.notifications_relay_error else R.string.notifications_save_error)
+        }
+    }
+
+    private fun finish(ok: Boolean, @StringRes messageRes: Int) =
+        _state.update { it.copy(busy = false, feedback = Feedback(ok, messageRes)) }
+}
+
+/**
+ * Whether a stream's toggle is selectable for a user: a personal stream needs a
+ * linked game account (PLAN.md §11). Pure so the gating is unit-tested without Compose.
+ */
+fun streamSelectable(stream: NotificationStreamDto, hasLinkedAccount: Boolean): Boolean =
+    !stream.requiresLinkedAccount || hasLinkedAccount

app/src/main/java/com/runicgateway/app/ui/player/CharacterSheetScreen.kt

@@ -0,0 +1,288 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.ui.player
+
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.FlowRow
+import androidx.compose.foundation.layout.ExperimentalLayoutApi
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.rememberScrollState
+import androidx.compose.foundation.verticalScroll
+import androidx.compose.material3.Card
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Surface
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.getValue
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.unit.dp
+import androidx.hilt.navigation.compose.hiltViewModel
+import androidx.lifecycle.compose.collectAsStateWithLifecycle
+import com.runicgateway.app.R
+import com.runicgateway.app.data.api.dto.CharProfileDto
+import com.runicgateway.app.data.api.dto.CharStatsDto
+import com.runicgateway.app.data.api.dto.EquipmentDto
+import com.runicgateway.app.data.api.dto.ResistDto
+import com.runicgateway.app.data.api.dto.SkillDto
+import com.runicgateway.app.data.api.dto.TitlesDto
+import com.runicgateway.app.ui.UiState
+import com.runicgateway.app.ui.components.ErrorView
+import com.runicgateway.app.ui.components.LoadingView
+import com.runicgateway.app.ui.components.SectionLabel
+import com.runicgateway.app.ui.components.StatBar
+import kotlinx.serialization.json.jsonPrimitive
+
+/**
+ * A text-only character sheet (PLAN.md §6.3): identity + standing, attributes and
+ * vitals, resistances, skills, and equipment. No item icons / paperdoll art — a
+ * richer view is a future enhancement pending the platform art work.
+ */
+@Composable
+fun CharacterSheetScreen(
+    modifier: Modifier = Modifier,
+    viewModel: CharacterViewModel = hiltViewModel(),
+) {
+    val state by viewModel.state.collectAsStateWithLifecycle()
+    when (val s = state) {
+        is UiState.Loading -> LoadingView(modifier)
+        is UiState.Error -> ErrorView(s.kind, onRetry = viewModel::load, modifier = modifier)
+        is UiState.Success -> CharacterSheet(s.data, modifier)
+    }
+}
+
+@Composable
+private fun CharacterSheet(char: CharProfileDto, modifier: Modifier = Modifier) {
+    Column(
+        modifier = modifier
+            .fillMaxSize()
+            .verticalScroll(rememberScrollState())
+            .padding(16.dp),
+        verticalArrangement = Arrangement.spacedBy(16.dp),
+    ) {
+        IdentityBlock(char)
+        StandingChips(char)
+        char.stats?.let { AttributesBlock(it) }
+        char.stats?.resist?.let { ResistancesBlock(it) }
+        SkillsBlock(char.skills)
+        EquipmentBlock(char.equipment)
+    }
+}
+
+@Composable
+private fun IdentityBlock(char: CharProfileDto) {
+    Column {
+        Text(
+            char.name ?: stringResource(R.string.player_char_unknown),
+            style = MaterialTheme.typography.headlineSmall,
+        )
+        char.title?.takeIf { it.isNotBlank() }?.let {
+            Text(it, style = MaterialTheme.typography.bodyMedium, color = MaterialTheme.colorScheme.onSurfaceVariant)
+        }
+        Row(Modifier.padding(top = 4.dp)) {
+            Text(
+                stringResource(if (char.online) R.string.player_char_online else R.string.player_char_offline),
+                style = MaterialTheme.typography.labelMedium,
+                color = if (char.online) MaterialTheme.colorScheme.primary else MaterialTheme.colorScheme.onSurfaceVariant,
+            )
+            char.serial?.let {
+                Text(
+                    "  ·  $it",
+                    style = MaterialTheme.typography.labelMedium,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                )
+            }
+        }
+    }
+}
+
+@OptIn(ExperimentalLayoutApi::class)
+@Composable
+private fun StandingChips(char: CharProfileDto) {
+    val chips = buildList {
+        char.governorOf.forEach { add(stringResource(R.string.player_char_governor, it)) }
+        char.guild?.let { g ->
+            val abbr = g.abbr?.let { " [$it]" } ?: ""
+            add(stringResource(R.string.player_char_guildmaster, "${g.name.orEmpty()}$abbr"))
+        }
+        addAll(displayTitles(char.titles))
+    }
+    if (chips.isEmpty()) return
+    FlowRow(horizontalArrangement = Arrangement.spacedBy(8.dp)) {
+        chips.forEach { Chip(it) }
+    }
+}
+
+@Composable
+private fun Chip(text: String) {
+    Surface(
+        color = MaterialTheme.colorScheme.secondaryContainer,
+        shape = MaterialTheme.shapes.small,
+    ) {
+        Text(
+            text,
+            style = MaterialTheme.typography.labelMedium,
+            color = MaterialTheme.colorScheme.onSecondaryContainer,
+            modifier = Modifier.padding(horizontal = 10.dp, vertical = 4.dp),
+        )
+    }
+}
+
+@Composable
+private fun AttributesBlock(stats: CharStatsDto) {
+    SheetCard(R.string.player_char_attributes) {
+        Row(Modifier.fillMaxWidth(), horizontalArrangement = Arrangement.SpaceBetween) {
+            Stat(stringResource(R.string.player_char_str), stats.str)
+            Stat(stringResource(R.string.player_char_dex), stats.dex)
+            Stat(stringResource(R.string.player_char_int), stats.int)
+        }
+        Column(Modifier.padding(top = 16.dp)) {
+            SectionLabel(stringResource(R.string.player_char_vitals))
+            Column(Modifier.padding(top = 8.dp)) {
+                Vital(stringResource(R.string.player_char_hits), stats.hits, stats.hitsMax)
+                Vital(stringResource(R.string.player_char_mana), stats.mana, stats.manaMax)
+                Vital(stringResource(R.string.player_char_stam), stats.stam, stats.stamMax)
+            }
+        }
+    }
+}
+
+@Composable
+private fun Stat(label: String, value: Int?) {
+    Column {
+        Text("${value ?: "—"}", style = MaterialTheme.typography.titleLarge)
+        Text(label, style = MaterialTheme.typography.labelSmall, color = MaterialTheme.colorScheme.onSurfaceVariant)
+    }
+}
+
+@Composable
+private fun Vital(label: String, cur: Int?, max: Int?) {
+    Column(Modifier.padding(vertical = 5.dp)) {
+        Row(Modifier.fillMaxWidth().padding(bottom = 4.dp), horizontalArrangement = Arrangement.SpaceBetween) {
+            Text(label, style = MaterialTheme.typography.labelMedium, color = MaterialTheme.colorScheme.onSurfaceVariant)
+            Text("${cur ?: "—"} / ${max ?: "—"}", style = MaterialTheme.typography.labelMedium, color = MaterialTheme.colorScheme.onSurfaceVariant)
+        }
+        val fraction = if (max != null && max > 0 && cur != null) cur.toFloat() / max else 0f
+        StatBar(fraction)
+    }
+}
+
+@Composable
+private fun ResistancesBlock(resist: ResistDto) {
+    val rows = listOf(
+        stringResource(R.string.player_char_phys) to resist.phys,
+        stringResource(R.string.player_char_fire) to resist.fire,
+        stringResource(R.string.player_char_cold) to resist.cold,
+        stringResource(R.string.player_char_pois) to resist.pois,
+        stringResource(R.string.player_char_energy) to resist.energy,
+    )
+    if (rows.all { it.second == null }) return
+    SheetCard(R.string.player_char_resistances) {
+        Row(Modifier.fillMaxWidth().padding(top = 4.dp), horizontalArrangement = Arrangement.SpaceBetween) {
+            rows.forEach { (label, value) ->
+                Column {
+                    Text("${value ?: 0}", style = MaterialTheme.typography.titleMedium)
+                    Text(label, style = MaterialTheme.typography.labelSmall, color = MaterialTheme.colorScheme.onSurfaceVariant)
+                }
+            }
+        }
+    }
+}
+
+@Composable
+private fun SkillsBlock(skills: List<SkillDto>) {
+    val shown = skills
+        .filter { (it.value ?: it.base ?: 0.0) > 0.0 }
+        .sortedByDescending { it.value ?: 0.0 }
+    if (shown.isEmpty()) return
+    SheetCard(R.string.player_char_skills) {
+        shown.forEach { skill ->
+            val value = skill.value ?: 0.0
+            Column(Modifier.padding(vertical = 5.dp)) {
+                Row(Modifier.fillMaxWidth().padding(bottom = 4.dp), horizontalArrangement = Arrangement.SpaceBetween) {
+                    Text(skill.n ?: "—", style = MaterialTheme.typography.labelMedium, color = MaterialTheme.colorScheme.onSurfaceVariant)
+                    Text(formatSkill(value), style = MaterialTheme.typography.labelMedium, color = MaterialTheme.colorScheme.onSurfaceVariant, fontWeight = FontWeight.Medium)
+                }
+                StatBar((value / SKILL_CAP).toFloat())
+            }
+        }
+    }
+}
+
+@OptIn(ExperimentalLayoutApi::class)
+@Composable
+private fun EquipmentBlock(equipment: List<EquipmentDto>) {
+    if (equipment.isEmpty()) return
+    SheetCard(R.string.player_char_equipment) {
+        equipment.forEach { item ->
+            Column(Modifier.fillMaxWidth().padding(vertical = 6.dp)) {
+                Text(
+                    item.layer ?: stringResource(R.string.player_char_item),
+                    style = MaterialTheme.typography.bodyLarge,
+                )
+                val meta = listOfNotNull(
+                    item.itemId?.let { stringResource(R.string.player_char_item_id, it) },
+                    item.hue?.takeIf { it != 0 }?.let { stringResource(R.string.player_char_item_hue, it) },
+                ).joinToString("  ·  ")
+                if (meta.isNotBlank()) {
+                    Text(meta, style = MaterialTheme.typography.labelSmall, color = MaterialTheme.colorScheme.onSurfaceVariant)
+                }
+                val mods = item.mods.orEmpty()
+                if (mods.isNotEmpty()) {
+                    FlowRow(Modifier.padding(top = 4.dp), horizontalArrangement = Arrangement.spacedBy(6.dp)) {
+                        mods.forEach { (k, v) -> Chip("$k ${jsonText(v)}") }
+                    }
+                }
+            }
+        }
+    }
+}
+
+@Composable
+private fun SheetCard(titleRes: Int, content: @Composable () -> Unit) {
+    Card(Modifier.fillMaxWidth()) {
+        Column(Modifier.padding(16.dp)) {
+            Text(stringResource(titleRes), style = MaterialTheme.typography.titleMedium)
+            content()
+        }
+    }
+}
+
+// ── Pure helpers (unit-tested) ───────────────────────────────────────────────
+
+/** ServUO's default skill cap; used to scale the skill meter fill (0..1). */
+private const val SKILL_CAP = 120.0
+
+/** Format a skill value: drop the ".0" on whole numbers, else one decimal. */
+internal fun formatSkill(value: Double): String =
+    if (value % 1.0 == 0.0) value.toInt().toString() else "%.1f".format(value)
+
+/**
+ * The human-readable title chips for a [TitlesDto] (parity with the website's
+ * `CharacterSheet.jsx#displayTitles`): fame/karma, skill title, and the selected
+ * reward title — but only if it is a literal string, not a bare cliloc number
+ * (the app ships no cliloc table). De-duplicated, blanks dropped.
+ */
+internal fun displayTitles(titles: TitlesDto?): List<String> {
+    if (titles == null) return emptyList()
+    val out = mutableListOf<String>()
+    titles.fameKarma?.let { out.add(it) }
+    titles.skill?.let { out.add(it) }
+    val reward = titles.reward
+    val sel = titles.selected ?: -1
+    val candidate = when {
+        sel in reward.indices -> reward[sel]
+        else -> reward.firstOrNull { it.isNotBlank() && !it.all(Char::isDigit) }
+    }
+    if (candidate != null && candidate.isNotBlank() && !candidate.all(Char::isDigit)) out.add(candidate)
+    return out.filter { it.isNotBlank() }.distinct()
+}
+
+private fun jsonText(element: kotlinx.serialization.json.JsonElement): String =
+    runCatching { element.jsonPrimitive.content }.getOrElse { element.toString() }

app/src/main/java/com/runicgateway/app/ui/player/CharacterViewModel.kt

@@ -0,0 +1,48 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.ui.player
+
+import androidx.lifecycle.SavedStateHandle
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.viewModelScope
+import com.runicgateway.app.data.api.dto.CharProfileDto
+import com.runicgateway.app.data.repository.PlayerShardRepository
+import com.runicgateway.app.ui.UiState
+import com.runicgateway.app.ui.navigation.Routes
+import com.runicgateway.app.ui.toUiState
+import dagger.hilt.android.lifecycle.HiltViewModel
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.StateFlow
+import kotlinx.coroutines.flow.asStateFlow
+import kotlinx.coroutines.launch
+import javax.inject.Inject
+
+/**
+ * A single character sheet (PLAN.md §6.3), read from `/player/shard/char/:serial`
+ * for a character on one of the caller's linked accounts (ownership-checked
+ * server-side). A `503` renders as offline/retry, a `403` as not-found (§7).
+ * Text-only presentation for v1.
+ */
+@HiltViewModel
+class CharacterViewModel @Inject constructor(
+    private val repository: PlayerShardRepository,
+    savedStateHandle: SavedStateHandle,
+) : ViewModel() {
+
+    private val serial: String = savedStateHandle.get<String>(Routes.Args.SERIAL).orEmpty()
+
+    private val _state = MutableStateFlow<UiState<CharProfileDto>>(UiState.Loading)
+    val state: StateFlow<UiState<CharProfileDto>> = _state.asStateFlow()
+
+    init {
+        load()
+    }
+
+    fun load() {
+        _state.value = UiState.Loading
+        viewModelScope.launch {
+            _state.value = repository.char(serial).toUiState()
+        }
+    }
+}

app/src/main/java/com/runicgateway/app/ui/player/CharactersScreen.kt

@@ -0,0 +1,243 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.ui.player
+
+import androidx.compose.foundation.clickable
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.rememberScrollState
+import androidx.compose.foundation.verticalScroll
+import androidx.compose.material3.Button
+import androidx.compose.material3.Card
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.OutlinedTextField
+import androidx.compose.material3.Text
+import androidx.compose.material3.TextButton
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.saveable.rememberSaveable
+import androidx.compose.runtime.setValue
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.text.input.KeyboardType
+import androidx.compose.ui.text.input.PasswordVisualTransformation
+import androidx.compose.ui.unit.dp
+import androidx.compose.foundation.text.KeyboardOptions
+import androidx.hilt.navigation.compose.hiltViewModel
+import androidx.lifecycle.compose.collectAsStateWithLifecycle
+import com.runicgateway.app.R
+import com.runicgateway.app.data.api.dto.RosterCharDto
+import com.runicgateway.app.ui.ErrorKind
+import com.runicgateway.app.ui.UiState
+import com.runicgateway.app.ui.components.ErrorView
+import com.runicgateway.app.ui.components.LoadingView
+import com.runicgateway.app.ui.components.PillTone
+import com.runicgateway.app.ui.components.StatusPill
+
+/**
+ * The player's linked game accounts + character rosters (PLAN.md §6.3). Tapping a
+ * character opens its text-only sheet. Not-yet-linked players get the `[link` code
+ * prompt (and, when the shard offers it, a hybrid signup form).
+ */
+@Composable
+fun CharactersScreen(
+    onOpenChar: (String) -> Unit,
+    modifier: Modifier = Modifier,
+    viewModel: CharactersViewModel = hiltViewModel(),
+) {
+    val state by viewModel.state.collectAsStateWithLifecycle()
+
+    when (val accounts = state.accounts) {
+        is UiState.Loading -> LoadingView(modifier)
+        is UiState.Error -> ErrorView(accounts.kind, onRetry = viewModel::load, modifier = modifier)
+        is UiState.Success -> Column(
+            modifier = modifier
+                .fillMaxSize()
+                .verticalScroll(rememberScrollState())
+                .padding(16.dp),
+            verticalArrangement = Arrangement.spacedBy(12.dp),
+        ) {
+            LinkCard(state, viewModel)
+            if (state.signupEnabled) CreateAccountCard(state, viewModel)
+
+            if (accounts.data.isEmpty()) {
+                Text(
+                    stringResource(R.string.player_characters_empty),
+                    style = MaterialTheme.typography.bodyMedium,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                )
+            } else {
+                accounts.data.forEach { account ->
+                    AccountRoster(
+                        account = account,
+                        roster = state.rosters[account] ?: UiState.Loading,
+                        onRetry = { viewModel.loadRoster(account) },
+                        onOpenChar = onOpenChar,
+                    )
+                }
+            }
+        }
+    }
+}
+
+@Composable
+private fun LinkCard(state: CharactersViewModel.State, viewModel: CharactersViewModel) {
+    var code by rememberSaveable { mutableStateOf("") }
+    Card(Modifier.fillMaxWidth()) {
+        Column(Modifier.padding(16.dp)) {
+            Text(stringResource(R.string.player_link_title), style = MaterialTheme.typography.titleMedium)
+            Text(
+                stringResource(R.string.player_link_hint),
+                style = MaterialTheme.typography.bodySmall,
+                color = MaterialTheme.colorScheme.onSurfaceVariant,
+                modifier = Modifier.padding(top = 6.dp),
+            )
+            OutlinedTextField(
+                value = code,
+                onValueChange = { code = it.uppercase() },
+                singleLine = true,
+                enabled = !state.busy,
+                label = { Text(stringResource(R.string.player_link_code)) },
+                modifier = Modifier.fillMaxWidth().padding(top = 12.dp),
+            )
+            Button(
+                onClick = { viewModel.link(code); code = "" },
+                enabled = !state.busy && code.isNotBlank(),
+                modifier = Modifier.padding(top = 12.dp),
+            ) { Text(stringResource(R.string.player_link_action)) }
+            FormFeedback(state.feedback)
+        }
+    }
+}
+
+@Composable
+private fun CreateAccountCard(state: CharactersViewModel.State, viewModel: CharactersViewModel) {
+    var account by rememberSaveable { mutableStateOf("") }
+    var password by rememberSaveable { mutableStateOf("") }
+    Card(Modifier.fillMaxWidth()) {
+        Column(Modifier.padding(16.dp)) {
+            Text(stringResource(R.string.player_create_title), style = MaterialTheme.typography.titleMedium)
+            OutlinedTextField(
+                value = account,
+                onValueChange = { account = it },
+                singleLine = true,
+                enabled = !state.busy,
+                label = { Text(stringResource(R.string.player_create_account)) },
+                modifier = Modifier.fillMaxWidth().padding(top = 12.dp),
+            )
+            OutlinedTextField(
+                value = password,
+                onValueChange = { password = it },
+                singleLine = true,
+                enabled = !state.busy,
+                label = { Text(stringResource(R.string.player_create_password)) },
+                visualTransformation = PasswordVisualTransformation(),
+                keyboardOptions = KeyboardOptions(keyboardType = KeyboardType.Password),
+                modifier = Modifier.fillMaxWidth().padding(top = 12.dp),
+            )
+            Button(
+                onClick = { viewModel.createAccount(account, password); password = "" },
+                enabled = !state.busy && account.isNotBlank() && password.length >= 8,
+                modifier = Modifier.padding(top = 12.dp),
+            ) { Text(stringResource(R.string.player_create_action)) }
+        }
+    }
+}
+
+@Composable
+private fun AccountRoster(
+    account: String,
+    roster: UiState<List<RosterCharDto>>,
+    onRetry: () -> Unit,
+    onOpenChar: (String) -> Unit,
+) {
+    Column {
+        Text(
+            account,
+            style = MaterialTheme.typography.titleSmall,
+            color = MaterialTheme.colorScheme.primary,
+            modifier = Modifier.padding(vertical = 8.dp),
+        )
+        when (roster) {
+            is UiState.Loading -> Text(
+                stringResource(R.string.player_roster_loading),
+                style = MaterialTheme.typography.bodySmall,
+                color = MaterialTheme.colorScheme.onSurfaceVariant,
+            )
+            is UiState.Error -> RosterError(roster.kind, onRetry)
+            is UiState.Success -> {
+                if (roster.data.isEmpty()) {
+                    Text(
+                        stringResource(R.string.player_roster_empty),
+                        style = MaterialTheme.typography.bodySmall,
+                        color = MaterialTheme.colorScheme.onSurfaceVariant,
+                    )
+                } else {
+                    roster.data.forEach { CharRow(it, onOpenChar) }
+                }
+            }
+        }
+    }
+}
+
+@Composable
+private fun RosterError(kind: ErrorKind, onRetry: () -> Unit) {
+    Row(verticalAlignment = Alignment.CenterVertically) {
+        Text(
+            stringResource(
+                if (kind == ErrorKind.SHARD_OFFLINE) R.string.error_shard_offline else R.string.error_server,
+            ),
+            style = MaterialTheme.typography.bodySmall,
+            color = MaterialTheme.colorScheme.onSurfaceVariant,
+            modifier = Modifier.weight(1f),
+        )
+        TextButton(onClick = onRetry) { Text(stringResource(R.string.action_retry)) }
+    }
+}
+
+@Composable
+private fun CharRow(char: RosterCharDto, onOpenChar: (String) -> Unit) {
+    Card(
+        Modifier
+            .fillMaxWidth()
+            .padding(vertical = 4.dp)
+            .clickable(enabled = char.serial.isNotBlank()) { onOpenChar(char.serial) },
+    ) {
+        Row(
+            Modifier.fillMaxWidth().padding(14.dp),
+            verticalAlignment = Alignment.CenterVertically,
+        ) {
+            Text(
+                char.name ?: stringResource(R.string.player_char_unknown),
+                style = MaterialTheme.typography.bodyLarge,
+                modifier = Modifier.weight(1f),
+            )
+            StatusPill(
+                text = stringResource(
+                    if (char.online) R.string.player_char_online else R.string.player_char_offline,
+                ),
+                tone = if (char.online) PillTone.Success else PillTone.Neutral,
+                modifier = Modifier.padding(end = 8.dp),
+            )
+            Text("›", style = MaterialTheme.typography.titleMedium, color = MaterialTheme.colorScheme.onSurfaceVariant)
+        }
+    }
+}
+
+@Composable
+private fun FormFeedback(feedback: CharactersViewModel.Feedback?) {
+    if (feedback == null) return
+    Text(
+        text = stringResource(feedback.messageRes),
+        style = MaterialTheme.typography.bodySmall,
+        color = if (feedback.ok) MaterialTheme.colorScheme.primary else MaterialTheme.colorScheme.error,
+        modifier = Modifier.padding(top = 10.dp),
+    )
+}

app/src/main/java/com/runicgateway/app/ui/player/CharactersViewModel.kt

@@ -0,0 +1,140 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.ui.player
+
+import androidx.annotation.StringRes
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.viewModelScope
+import com.runicgateway.app.R
+import com.runicgateway.app.core.result.ApiResult
+import com.runicgateway.app.core.result.map
+import com.runicgateway.app.data.api.dto.RosterCharDto
+import com.runicgateway.app.data.repository.PlayerShardRepository
+import com.runicgateway.app.data.repository.SettingsRepository
+import com.runicgateway.app.ui.UiState
+import com.runicgateway.app.ui.toUiState
+import dagger.hilt.android.lifecycle.HiltViewModel
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.StateFlow
+import kotlinx.coroutines.flow.asStateFlow
+import kotlinx.coroutines.flow.update
+import kotlinx.coroutines.launch
+import javax.inject.Inject
+
+/**
+ * The player's linked game accounts + per-account character rosters (PLAN.md §6.3):
+ * link a game account with a `[link` one-time code (or, when the shard offers it,
+ * a hybrid signup), then browse characters and open a text-only sheet. A per-account
+ * roster carries its own load state so a down shard degrades that account to a
+ * retry without blocking the rest (§7).
+ */
+@HiltViewModel
+class CharactersViewModel @Inject constructor(
+    private val repository: PlayerShardRepository,
+    private val settingsRepository: SettingsRepository,
+) : ViewModel() {
+
+    /** A one-shot banner for the link / create-account forms. */
+    data class Feedback(val ok: Boolean, @param:StringRes val messageRes: Int)
+
+    data class State(
+        val accounts: UiState<List<String>> = UiState.Loading,
+        val rosters: Map<String, UiState<List<RosterCharDto>>> = emptyMap(),
+        /** Whether the shard currently offers hybrid game-account signup. */
+        val signupEnabled: Boolean = false,
+        val busy: Boolean = false,
+        val feedback: Feedback? = null,
+    )
+
+    private val _state = MutableStateFlow(State())
+    val state: StateFlow<State> = _state.asStateFlow()
+
+    init {
+        load()
+    }
+
+    fun load() {
+        _state.update { it.copy(accounts = UiState.Loading, rosters = emptyMap()) }
+        viewModelScope.launch {
+            when (val result = repository.accounts()) {
+                is ApiResult.Ok -> {
+                    val names = result.data.map { it.account }
+                    _state.update { it.copy(accounts = UiState.Success(names)) }
+                    names.forEach { loadRoster(it) }
+                }
+                else -> _state.update { it.copy(accounts = result.map { emptyList<String>() }.toUiState()) }
+            }
+        }
+        // Non-critical: whether hybrid signup is offered right now.
+        viewModelScope.launch {
+            when (val settings = settingsRepository.getSettings()) {
+                is ApiResult.Ok -> _state.update { it.copy(signupEnabled = settings.data.gameAccountSignup) }
+                else -> Unit
+            }
+        }
+    }
+
+    fun loadRoster(account: String) {
+        _state.update { it.copy(rosters = it.rosters + (account to UiState.Loading)) }
+        viewModelScope.launch {
+            val roster = repository.roster(account).map { it.chars }.toUiState()
+            _state.update { it.copy(rosters = it.rosters + (account to roster)) }
+        }
+    }
+
+    fun clearFeedback() = _state.update { it.copy(feedback = null) }
+
+    fun link(code: String) {
+        if (_state.value.busy || code.isBlank()) return
+        _state.update { it.copy(busy = true, feedback = null) }
+        viewModelScope.launch {
+            when (val result = repository.link(code.trim())) {
+                is ApiResult.Ok -> {
+                    _state.update { it.copy(busy = false, feedback = Feedback(true, R.string.player_link_ok)) }
+                    load()
+                }
+                is ApiResult.HttpError -> _state.update {
+                    it.copy(busy = false, feedback = Feedback(false, linkErrorRes(result.status)))
+                }
+                is ApiResult.NetworkError -> _state.update {
+                    it.copy(busy = false, feedback = Feedback(false, R.string.error_network))
+                }
+            }
+        }
+    }
+
+    fun createAccount(account: String, password: String) {
+        if (_state.value.busy || account.isBlank() || password.length < 8) return
+        _state.update { it.copy(busy = true, feedback = null) }
+        viewModelScope.launch {
+            when (val result = repository.createAccount(account.trim(), password)) {
+                is ApiResult.Ok -> {
+                    _state.update { it.copy(busy = false, feedback = Feedback(true, R.string.player_create_ok)) }
+                    load()
+                }
+                is ApiResult.HttpError -> _state.update {
+                    it.copy(busy = false, feedback = Feedback(false, createErrorRes(result.status)))
+                }
+                is ApiResult.NetworkError -> _state.update {
+                    it.copy(busy = false, feedback = Feedback(false, R.string.error_network))
+                }
+            }
+        }
+    }
+
+    private fun linkErrorRes(status: Int): Int = when (status) {
+        400 -> R.string.player_link_bad_code
+        503 -> R.string.error_shard_offline
+        else -> R.string.player_link_error
+    }
+
+    private fun createErrorRes(status: Int): Int = when (status) {
+        409 -> R.string.player_create_taken
+        429 -> R.string.player_create_capped
+        403 -> R.string.player_create_unavailable
+        400 -> R.string.player_create_rejected
+        503 -> R.string.error_shard_offline
+        else -> R.string.player_create_error
+    }
+}

app/src/main/java/com/runicgateway/app/ui/player/MyHousesScreen.kt

@@ -0,0 +1,106 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.ui.player
+
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.lazy.LazyColumn
+import androidx.compose.foundation.lazy.items
+import androidx.compose.material3.Card
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.getValue
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.text.style.TextOverflow
+import androidx.compose.ui.unit.dp
+import androidx.hilt.navigation.compose.hiltViewModel
+import androidx.lifecycle.compose.collectAsStateWithLifecycle
+import com.runicgateway.app.R
+import com.runicgateway.app.data.api.dto.PlayerHouseDto
+import com.runicgateway.app.ui.UiState
+import com.runicgateway.app.ui.components.EmptyView
+import com.runicgateway.app.ui.components.ErrorView
+import com.runicgateway.app.ui.components.LoadingView
+
+/**
+ * The player's own houses with home/decay status (PLAN.md §6.3), text-only. An
+ * IDOC house is flagged prominently. Only the caller's own property is ever shown.
+ */
+@Composable
+fun MyHousesScreen(
+    modifier: Modifier = Modifier,
+    viewModel: MyHousesViewModel = hiltViewModel(),
+) {
+    val state by viewModel.state.collectAsStateWithLifecycle()
+    when (val s = state) {
+        is UiState.Loading -> LoadingView(modifier)
+        is UiState.Error -> ErrorView(s.kind, onRetry = viewModel::load, modifier = modifier)
+        is UiState.Success -> {
+            if (s.data.isEmpty()) {
+                EmptyView(stringResource(R.string.player_houses_empty), modifier)
+            } else {
+                LazyColumn(
+                    modifier = modifier.fillMaxSize().padding(horizontal = 16.dp),
+                    verticalArrangement = Arrangement.spacedBy(8.dp),
+                    contentPadding = androidx.compose.foundation.layout.PaddingValues(vertical = 16.dp),
+                ) {
+                    items(s.data, key = { it.serial }) { house -> HouseCard(house) }
+                }
+            }
+        }
+    }
+}
+
+@Composable
+private fun HouseCard(house: PlayerHouseDto) {
+    Card(Modifier.fillMaxWidth()) {
+        Column(Modifier.padding(16.dp)) {
+            Row(Modifier.fillMaxWidth()) {
+                Text(
+                    text = house.name?.takeIf { it.isNotBlank() }
+                        ?: house.region
+                        ?: stringResource(R.string.player_house_fallback),
+                    style = MaterialTheme.typography.titleMedium,
+                    maxLines = 1,
+                    overflow = TextOverflow.Ellipsis,
+                    modifier = Modifier.weight(1f),
+                )
+                if (house.isIdoc) {
+                    Text(
+                        stringResource(R.string.houses_idoc_badge),
+                        style = MaterialTheme.typography.labelMedium,
+                        color = MaterialTheme.colorScheme.error,
+                    )
+                }
+            }
+            house.stage?.takeIf { it.isNotBlank() }?.let {
+                Text(
+                    stringResource(R.string.player_house_stage, it),
+                    style = MaterialTheme.typography.bodySmall,
+                    color = if (house.isIdoc) MaterialTheme.colorScheme.error else MaterialTheme.colorScheme.onSurfaceVariant,
+                    modifier = Modifier.padding(top = 6.dp),
+                )
+            }
+            val where = listOfNotNull(
+                house.region,
+                house.map,
+                house.x?.let { "(${house.x}, ${house.y})" },
+            ).joinToString("  ·  ")
+            if (where.isNotBlank()) {
+                Text(
+                    where,
+                    style = MaterialTheme.typography.bodySmall,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                    modifier = Modifier.padding(top = 4.dp),
+                )
+            }
+        }
+    }
+}

app/src/main/java/com/runicgateway/app/ui/player/MyHousesViewModel.kt

@@ -0,0 +1,41 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.ui.player
+
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.viewModelScope
+import com.runicgateway.app.data.api.dto.PlayerHouseDto
+import com.runicgateway.app.data.repository.PlayerShardRepository
+import com.runicgateway.app.ui.UiState
+import com.runicgateway.app.ui.toUiState
+import dagger.hilt.android.lifecycle.HiltViewModel
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.StateFlow
+import kotlinx.coroutines.flow.asStateFlow
+import kotlinx.coroutines.launch
+import javax.inject.Inject
+
+/**
+ * The player's OWN houses with decay/IDOC status (PLAN.md §6.3), read from
+ * `/player/shard/houses` — never anyone else's. A `503` renders as offline/retry (§7).
+ */
+@HiltViewModel
+class MyHousesViewModel @Inject constructor(
+    private val repository: PlayerShardRepository,
+) : ViewModel() {
+
+    private val _state = MutableStateFlow<UiState<List<PlayerHouseDto>>>(UiState.Loading)
+    val state: StateFlow<UiState<List<PlayerHouseDto>>> = _state.asStateFlow()
+
+    init {
+        load()
+    }
+
+    fun load() {
+        _state.value = UiState.Loading
+        viewModelScope.launch {
+            _state.value = repository.houses().toUiState()
+        }
+    }
+}

app/src/main/java/com/runicgateway/app/ui/player/VendorsScreen.kt

@@ -0,0 +1,229 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.ui.player
+
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.rememberScrollState
+import androidx.compose.foundation.verticalScroll
+import androidx.compose.material3.Card
+import androidx.compose.material3.HorizontalDivider
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Text
+import androidx.compose.material3.TextButton
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.getValue
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.unit.dp
+import androidx.hilt.navigation.compose.hiltViewModel
+import androidx.lifecycle.compose.collectAsStateWithLifecycle
+import com.runicgateway.app.R
+import com.runicgateway.app.data.api.dto.VendorDto
+import com.runicgateway.app.data.api.dto.VendorListingDto
+import com.runicgateway.app.data.api.dto.VendorSaleDto
+import com.runicgateway.app.ui.ErrorKind
+import com.runicgateway.app.ui.UiState
+import com.runicgateway.app.ui.components.ErrorView
+import com.runicgateway.app.ui.components.LoadingView
+import java.text.DateFormat
+import java.util.Date
+
+/**
+ * The player's own player-vendors + recent sales (PLAN.md §6.3), text-only. Vendor
+ * shops group under their game account; recent sales list across all linked
+ * accounts. A down shard degrades to a per-account retry (§7).
+ */
+@Composable
+fun VendorsScreen(
+    modifier: Modifier = Modifier,
+    viewModel: VendorsViewModel = hiltViewModel(),
+) {
+    val state by viewModel.state.collectAsStateWithLifecycle()
+
+    when (val accounts = state.accounts) {
+        is UiState.Loading -> LoadingView(modifier)
+        is UiState.Error -> ErrorView(accounts.kind, onRetry = viewModel::load, modifier = modifier)
+        is UiState.Success -> Column(
+            modifier = modifier
+                .fillMaxSize()
+                .verticalScroll(rememberScrollState())
+                .padding(16.dp),
+            verticalArrangement = Arrangement.spacedBy(12.dp),
+        ) {
+            SalesCard(state.sales)
+
+            if (accounts.data.isEmpty()) {
+                Text(
+                    stringResource(R.string.player_vendors_no_accounts),
+                    style = MaterialTheme.typography.bodyMedium,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                )
+            } else {
+                accounts.data.forEach { account ->
+                    AccountVendors(
+                        account = account,
+                        vendors = state.vendors[account] ?: UiState.Loading,
+                        onRetry = { viewModel.loadVendors(account) },
+                    )
+                }
+            }
+        }
+    }
+}
+
+@Composable
+private fun SalesCard(sales: UiState<List<VendorSaleDto>>) {
+    Card(Modifier.fillMaxWidth()) {
+        Column(Modifier.padding(16.dp)) {
+            Text(stringResource(R.string.player_sales_title), style = MaterialTheme.typography.titleMedium)
+            when (sales) {
+                is UiState.Loading -> Text(
+                    stringResource(R.string.player_roster_loading),
+                    style = MaterialTheme.typography.bodySmall,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                    modifier = Modifier.padding(top = 8.dp),
+                )
+                is UiState.Error -> Text(
+                    stringResource(R.string.error_server),
+                    style = MaterialTheme.typography.bodySmall,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                    modifier = Modifier.padding(top = 8.dp),
+                )
+                is UiState.Success -> {
+                    if (sales.data.isEmpty()) {
+                        Text(
+                            stringResource(R.string.player_sales_empty),
+                            style = MaterialTheme.typography.bodySmall,
+                            color = MaterialTheme.colorScheme.onSurfaceVariant,
+                            modifier = Modifier.padding(top = 8.dp),
+                        )
+                    } else {
+                        sales.data.forEach { SaleRow(it) }
+                    }
+                }
+            }
+        }
+    }
+}
+
+@Composable
+private fun SaleRow(sale: VendorSaleDto) {
+    Row(Modifier.fillMaxWidth().padding(top = 10.dp), horizontalArrangement = Arrangement.SpaceBetween) {
+        Column(Modifier.padding(end = 12.dp)) {
+            Text(
+                sale.itemType ?: stringResource(R.string.player_char_item),
+                style = MaterialTheme.typography.bodyMedium,
+            )
+            sale.t?.let {
+                Text(
+                    DateFormat.getDateTimeInstance(DateFormat.MEDIUM, DateFormat.SHORT).format(Date(it)),
+                    style = MaterialTheme.typography.labelSmall,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                )
+            }
+        }
+        Text(
+            stringResource(R.string.player_gold_amount, "%,d".format(sale.price ?: 0L)),
+            style = MaterialTheme.typography.bodyMedium,
+        )
+    }
+}
+
+@Composable
+private fun AccountVendors(
+    account: String,
+    vendors: UiState<List<VendorDto>>,
+    onRetry: () -> Unit,
+) {
+    Column {
+        Text(
+            account,
+            style = MaterialTheme.typography.titleSmall,
+            color = MaterialTheme.colorScheme.primary,
+            modifier = Modifier.padding(vertical = 8.dp),
+        )
+        when (vendors) {
+            is UiState.Loading -> Text(
+                stringResource(R.string.player_roster_loading),
+                style = MaterialTheme.typography.bodySmall,
+                color = MaterialTheme.colorScheme.onSurfaceVariant,
+            )
+            is UiState.Error -> VendorError(vendors.kind, onRetry)
+            is UiState.Success -> {
+                if (vendors.data.isEmpty()) {
+                    Text(
+                        stringResource(R.string.player_vendors_empty),
+                        style = MaterialTheme.typography.bodySmall,
+                        color = MaterialTheme.colorScheme.onSurfaceVariant,
+                    )
+                } else {
+                    vendors.data.forEach { VendorCard(it) }
+                }
+            }
+        }
+    }
+}
+
+@Composable
+private fun VendorError(kind: ErrorKind, onRetry: () -> Unit) {
+    Row {
+        Text(
+            stringResource(if (kind == ErrorKind.SHARD_OFFLINE) R.string.error_shard_offline else R.string.error_server),
+            style = MaterialTheme.typography.bodySmall,
+            color = MaterialTheme.colorScheme.onSurfaceVariant,
+            modifier = Modifier.weight(1f),
+        )
+        TextButton(onClick = onRetry) { Text(stringResource(R.string.action_retry)) }
+    }
+}
+
+@Composable
+private fun VendorCard(vendor: VendorDto) {
+    Card(Modifier.fillMaxWidth().padding(vertical = 4.dp)) {
+        Column(Modifier.padding(16.dp)) {
+            Text(
+                vendor.shopName ?: stringResource(R.string.player_vendor_fallback),
+                style = MaterialTheme.typography.titleMedium,
+            )
+            val meta = listOfNotNull(
+                vendor.holdGold?.let { stringResource(R.string.player_vendor_hold, "%,d".format(it)) },
+                vendor.map,
+            ).joinToString("  ·  ")
+            if (meta.isNotBlank()) {
+                Text(meta, style = MaterialTheme.typography.labelSmall, color = MaterialTheme.colorScheme.onSurfaceVariant, modifier = Modifier.padding(top = 2.dp))
+            }
+            if (vendor.listings.isNotEmpty()) {
+                HorizontalDivider(Modifier.padding(vertical = 8.dp))
+                vendor.listings.forEach { ListingRow(it) }
+            } else {
+                Text(
+                    stringResource(R.string.player_vendor_no_listings),
+                    style = MaterialTheme.typography.bodySmall,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                    modifier = Modifier.padding(top = 8.dp),
+                )
+            }
+        }
+    }
+}
+
+@Composable
+private fun ListingRow(listing: VendorListingDto) {
+    Row(Modifier.fillMaxWidth().padding(vertical = 3.dp), horizontalArrangement = Arrangement.SpaceBetween) {
+        Text(
+            stringResource(R.string.player_listing_item, listing.itemId ?: 0, listing.amount ?: 1),
+            style = MaterialTheme.typography.bodySmall,
+            modifier = Modifier.weight(1f),
+        )
+        Text(
+            stringResource(R.string.player_gold_amount, "%,d".format(listing.price ?: 0L)),
+            style = MaterialTheme.typography.bodySmall,
+        )
+    }
+}

app/src/main/java/com/runicgateway/app/ui/player/VendorsViewModel.kt

@@ -0,0 +1,72 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.ui.player
+
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.viewModelScope
+import com.runicgateway.app.core.result.ApiResult
+import com.runicgateway.app.core.result.map
+import com.runicgateway.app.data.api.dto.VendorDto
+import com.runicgateway.app.data.api.dto.VendorSaleDto
+import com.runicgateway.app.data.repository.PlayerShardRepository
+import com.runicgateway.app.ui.UiState
+import com.runicgateway.app.ui.toUiState
+import dagger.hilt.android.lifecycle.HiltViewModel
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.StateFlow
+import kotlinx.coroutines.flow.asStateFlow
+import kotlinx.coroutines.flow.update
+import kotlinx.coroutines.launch
+import javax.inject.Inject
+
+/**
+ * The player's own player-vendors and recent vendor sales (PLAN.md §6.3): a
+ * per-account vendor snapshot (shops + listings) over `/player/shard/vendors/:account`
+ * plus the recent-sales log over `/player/shard/sales`. Each account's snapshot
+ * carries its own load state so a down shard degrades one account to a retry (§7).
+ * Text-only listings — item names are clilocs the app has no table for.
+ */
+@HiltViewModel
+class VendorsViewModel @Inject constructor(
+    private val repository: PlayerShardRepository,
+) : ViewModel() {
+
+    data class State(
+        val accounts: UiState<List<String>> = UiState.Loading,
+        val vendors: Map<String, UiState<List<VendorDto>>> = emptyMap(),
+        val sales: UiState<List<VendorSaleDto>> = UiState.Loading,
+    )
+
+    private val _state = MutableStateFlow(State())
+    val state: StateFlow<State> = _state.asStateFlow()
+
+    init {
+        load()
+    }
+
+    fun load() {
+        _state.update { it.copy(accounts = UiState.Loading, vendors = emptyMap(), sales = UiState.Loading) }
+        viewModelScope.launch {
+            when (val result = repository.accounts()) {
+                is ApiResult.Ok -> {
+                    val names = result.data.map { it.account }
+                    _state.update { it.copy(accounts = UiState.Success(names)) }
+                    names.forEach { loadVendors(it) }
+                }
+                else -> _state.update { it.copy(accounts = result.map { emptyList<String>() }.toUiState()) }
+            }
+        }
+        viewModelScope.launch {
+            _state.update { it.copy(sales = repository.sales().toUiState()) }
+        }
+    }
+
+    fun loadVendors(account: String) {
+        _state.update { it.copy(vendors = it.vendors + (account to UiState.Loading)) }
+        viewModelScope.launch {
+            val vendors = repository.vendors(account).map { it.vendors }.toUiState()
+            _state.update { it.copy(vendors = it.vendors + (account to vendors)) }
+        }
+    }
+}

app/src/main/java/com/runicgateway/app/ui/session/SessionViewModel.kt

@@ -0,0 +1,39 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.ui.session
+
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.viewModelScope
+import com.runicgateway.app.core.auth.Session
+import com.runicgateway.app.core.auth.SessionManager
+import com.runicgateway.app.data.repository.AuthRepository
+import dagger.hilt.android.lifecycle.HiltViewModel
+import kotlinx.coroutines.flow.StateFlow
+import kotlinx.coroutines.launch
+import javax.inject.Inject
+
+/**
+ * Activity-scoped view of the current session for the app shell (PLAN.md §4.3,
+ * §5): the shared menu observes [session] to reveal signed-in groups + the
+ * sign-in/out toggle, and the shell drives resume re-validation and sign-out.
+ * Login itself lives in [com.runicgateway.app.ui.auth.LoginViewModel].
+ */
+@HiltViewModel
+class SessionViewModel @Inject constructor(
+    sessionManager: SessionManager,
+    private val authRepository: AuthRepository,
+) : ViewModel() {
+
+    val session: StateFlow<Session> = sessionManager.state
+
+    /** Re-validate the cached role against the backend on app resume. */
+    fun revalidate() {
+        viewModelScope.launch { authRepository.revalidate() }
+    }
+
+    /** Sign out of this session, or every session with [allDevices]. */
+    fun signOut(allDevices: Boolean = false) {
+        viewModelScope.launch { authRepository.logout(allDevices) }
+    }
+}

app/src/main/java/com/runicgateway/app/ui/shard/ChampsScreen.kt

@@ -0,0 +1,108 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.ui.shard
+
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.padding
+import androidx.compose.material3.Card
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.getValue
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.text.style.TextOverflow
+import androidx.compose.ui.unit.dp
+import androidx.hilt.navigation.compose.hiltViewModel
+import androidx.lifecycle.compose.collectAsStateWithLifecycle
+import com.runicgateway.app.R
+import com.runicgateway.app.data.api.dto.ChampDto
+import com.runicgateway.app.ui.components.PillTone
+import com.runicgateway.app.ui.components.StatusPill
+
+/** The champion-spawn board (PLAN.md §6.2), live via SSE deltas. */
+@Composable
+fun ChampsScreen(
+    modifier: Modifier = Modifier,
+    viewModel: ChampsViewModel = hiltViewModel(),
+) {
+    val state by viewModel.state.collectAsStateWithLifecycle()
+    val connected by viewModel.connected.collectAsStateWithLifecycle()
+
+    LiveBoardScreen(
+        emptyMessage = stringResource(R.string.champs_empty),
+        state = state,
+        connected = connected,
+        onRetry = viewModel::load,
+        key = { it.serial },
+        modifier = modifier,
+    ) { champ -> ChampCard(champ) }
+}
+
+@Composable
+private fun ChampCard(champ: ChampDto) {
+    Card(Modifier.fillMaxWidth()) {
+        Column(Modifier.padding(16.dp)) {
+            Row(Modifier.fillMaxWidth()) {
+                Text(
+                    text = champ.name ?: champ.type ?: stringResource(R.string.champs_fallback_name),
+                    style = MaterialTheme.typography.titleMedium,
+                    maxLines = 1,
+                    overflow = TextOverflow.Ellipsis,
+                    modifier = Modifier.weight(1f),
+                )
+                champ.status?.let {
+                    StatusPill(text = it, tone = champStatusTone(it))
+                }
+            }
+            val detail = champDetail(champ)
+            if (detail.isNotBlank()) {
+                Text(
+                    text = detail,
+                    style = MaterialTheme.typography.bodyMedium,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                    modifier = Modifier.padding(top = 6.dp),
+                )
+            }
+            val where = listOfNotNull(champ.map, champ.x?.let { "(${champ.x}, ${champ.y})" }).joinToString(" ")
+            if (where.isNotBlank()) {
+                Text(
+                    text = where,
+                    style = MaterialTheme.typography.labelSmall,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                    modifier = Modifier.padding(top = 4.dp),
+                )
+            }
+        }
+    }
+}
+
+/** Map a champ status to a pill tone: live spawns read green, cooldowns amber. */
+private fun champStatusTone(status: String): PillTone = when (status.lowercase()) {
+    "active", "up", "spawned" -> PillTone.Success
+    "cooldown", "restarting", "advancing" -> PillTone.Warning
+    else -> PillTone.Neutral
+}
+
+/** A short category-specific status line, mirroring the website's champ detail. */
+@Composable
+private fun champDetail(champ: ChampDto): String = when (champ.category) {
+    "sea" -> if (champ.hitsMax != null) {
+        "%,d / %,d hp".format(champ.hits ?: 0, champ.hitsMax)
+    } else {
+        champ.boss ?: champ.type ?: ""
+    }
+    "mini" -> stringResource(R.string.champ_level, champ.level ?: 0)
+    else -> when (champ.status) {
+        "active" -> if (champ.maxKills != null) {
+            "%,d / %,d kills".format(champ.kills ?: 0, champ.maxKills)
+        } else {
+            stringResource(R.string.champ_level, champ.level ?: 0)
+        }
+        "cooldown" -> stringResource(R.string.champ_cooldown)
+        else -> ""
+    }
+}