ci(sonarqube): add non-blocking SonarQube analysis on push to main

Mirrors the website repo's setup: a source-based scan of app/src/main
(Kotlin) that reports to the self-hosted SonarQube server after merge,
never gating PRs. Project key runic-gateway-android-app.

Co-Authored-By: Claude <noreply@anthropic.com>

.gitattributes

@@ -0,0 +1,19 @@
+# SPDX-License-Identifier: GPL-3.0-or-later
+# Deterministic line endings across contributor platforms.
+
+# Default: normalize to LF in the repo.
+* text=auto eol=lf
+
+# The Gradle wrapper POSIX script MUST stay LF (runs on the Linux CI runner).
+gradlew text eol=lf
+
+# Windows batch files must be CRLF.
+*.bat text eol=crlf
+
+# Binary assets — never touch line endings.
+*.jar binary
+*.keystore binary
+*.jks binary
+*.png binary
+*.webp binary
+*.ico binary

.gitea/workflows/pr-checks.yml

@@ -0,0 +1,75 @@
+# Gate every pull request into `main` on lint + unit tests + a debug build, so a
+# broken build can't reach the deployable branch. Debug builds are auto-signed,
+# so this gate needs no secrets. The signed *release* APK + Gitea release come
+# later (release.yml, M6). See docs/android/PLAN.md §12.
+#
+# Enforcement (one-time, in the Gitea UI):
+#   Repository Settings -> Branches -> Branch Protection (rule for `main`)
+#     * Enable Status Check
+#     * Status check patterns:  PR Checks / *
+#
+# Runner: the org's self-hosted `ubuntu-latest`. The container lacks
+# git/curl/unzip (needed by checkout + sdkmanager), so the first step installs
+# them. It also installs JDK 17 from the Ubuntu archive rather than using
+# actions/setup-java, because this runner can't resolve api.adoptium.net (that
+# download fails with EAI_AGAIN) while the Ubuntu mirrors are reachable.
+# (Faster later: switch to a prebuilt Android-SDK+JDK container image so nothing
+# installs per-run.)
+
+name: PR Checks
+
+on:
+  pull_request:
+    branches: [main]
+
+concurrency:
+  group: pr-checks-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  android-build:
+    runs-on: ubuntu-latest
+    steps:
+      # Install the tools checkout + the SDK installer need, plus JDK 17 (see the
+      # header note on why we avoid actions/setup-java on this runner).
+      - name: Install base tools + JDK 17
+        run: |
+          apt-get update
+          apt-get install -y git curl unzip openjdk-17-jdk-headless
+          echo "JAVA_HOME=/usr/lib/jvm/java-17-openjdk-amd64" >> "$GITHUB_ENV"
+
+      - uses: actions/checkout@v4
+
+      - name: Set up Android SDK
+        uses: android-actions/setup-android@v3
+
+      # Install exactly what the build targets so it never depends on AGP's
+      # build-time auto-download. `yes |` accepts any license prompts; `set
+      # +o pipefail` so `yes` dying with SIGPIPE (exit 141) once sdkmanager
+      # closes the pipe doesn't fail the step -- sdkmanager's own exit, last in
+      # the pipeline, still gates success.
+      - 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 }}-
+
+      # chmod defensively: this runner's checkout doesn't preserve the git
+      # executable bit, so `./gradlew` alone fails with "Permission denied".
+      # Debug-variant-only gate: unit tests, lint, and the debug APK. Scoping to
+      # the debug variant (vs. the aggregate `test`/`lint`) avoids compiling and
+      # linting the release variant in parallel, which halves peak memory on the
+      # runner and keeps lint's report phase from GC-thrashing (see gradle.properties).
+      - name: Lint, test, assemble debug
+        run: |
+          chmod +x ./gradlew
+          ./gradlew --no-daemon testDebugUnitTest lintDebug assembleDebug

.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 +1,54 @@
+# 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: this analyses the Kotlin source directly (the Sonar scanner reads
+# sonar-project.properties). It does NOT run a Gradle build, so no Android SDK /
+# JDK install is needed — the Kotlin analyzer is source-based. See the "Optional
+# enrichment" note in sonar-project.properties for wiring in Android Lint /
+# coverage reports later.
+
+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:
+      - 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: Run SonarQube scan
+        uses: sonarsource/sonarqube-scan-action@v4
+        env:
+          SONAR_TOKEN: ${{ secrets.SONAR_TOKEN }}
+          SONAR_HOST_URL: ${{ vars.SONAR_HOST_URL }}

.gitignore

@@ -0,0 +1,30 @@
+# SPDX-License-Identifier: GPL-3.0-or-later
+# Android / Gradle / IDE ignores.
+
+# Built output
+/build/
+/app/build/
+*.apk
+*.aab
+*.ap_
+*.dex
+
+# Gradle
+.gradle/
+local.properties
+
+# Keystores / signing material — never commit (release keystore is a CI secret, PLAN.md §12)
+*.jks
+*.keystore
+keystore.properties
+
+# Android Studio / IntelliJ
+.idea/
+*.iml
+.DS_Store
+captures/
+.externalNativeBuild/
+.cxx/
+
+# Kotlin
+.kotlin/

CODE_OF_CONDUCT.md

@@ -0,0 +1,133 @@
+# Contributor Covenant Code of Conduct
+
+## Our Pledge
+
+We as members, contributors, and leaders pledge to make participation in our
+community a harassment-free experience for everyone, regardless of age, body
+size, visible or invisible disability, ethnicity, sex characteristics, gender
+identity and expression, level of experience, education, socio-economic status,
+nationality, personal appearance, race, caste, color, religion, or sexual
+identity and orientation.
+
+We pledge to act and interact in ways that contribute to an open, welcoming,
+diverse, inclusive, and healthy community.
+
+## Our Standards
+
+Examples of behavior that contributes to a positive environment for our
+community include:
+
+* Demonstrating empathy and kindness toward other people
+* Being respectful of differing opinions, viewpoints, and experiences
+* Giving and gracefully accepting constructive feedback
+* Accepting responsibility and apologizing to those affected by our mistakes,
+  and learning from the experience
+* Focusing on what is best not just for us as individuals, but for the overall
+  community
+
+Examples of unacceptable behavior include:
+
+* The use of sexualized language or imagery, and sexual attention or advances of
+  any kind
+* Trolling, insulting or derogatory comments, and personal or political attacks
+* Public or private harassment
+* Publishing others' private information, such as a physical or email address,
+  without their explicit permission
+* Other conduct which could reasonably be considered inappropriate in a
+  professional setting
+
+## Enforcement Responsibilities
+
+Community leaders are responsible for clarifying and enforcing our standards of
+acceptable behavior and will take appropriate and fair corrective action in
+response to any behavior that they deem inappropriate, threatening, offensive,
+or harmful.
+
+Community leaders have the right and responsibility to remove, edit, or reject
+comments, commits, code, wiki edits, issues, and other contributions that are
+not aligned to this Code of Conduct, and will communicate reasons for moderation
+decisions when appropriate.
+
+## Scope
+
+This Code of Conduct applies within all community spaces, and also applies when
+an individual is officially representing the community in public spaces.
+Examples of representing our community include using an official email address,
+posting via an official social media account, or acting as an appointed
+representative at an online or offline event.
+
+## Enforcement
+
+Instances of abusive, harassing, or otherwise unacceptable behavior may be
+reported to the community leaders responsible for enforcement at
+**whitlocktech@gmail.com**.
+
+All complaints will be reviewed and investigated promptly and fairly.
+
+All community leaders are obligated to respect the privacy and security of the
+reporter of any incident.
+
+## Enforcement Guidelines
+
+Community leaders will follow these Community Impact Guidelines in determining
+the consequences for any action they deem in violation of this Code of Conduct:
+
+### 1. Correction
+
+**Community Impact**: Use of inappropriate language or other behavior deemed
+unprofessional or unwelcome in the community.
+
+**Consequence**: A private, written warning from community leaders, providing
+clarity around the nature of the violation and an explanation of why the
+behavior was inappropriate. A public apology may be requested.
+
+### 2. Warning
+
+**Community Impact**: A violation through a single incident or series of
+actions.
+
+**Consequence**: A warning with consequences for continued behavior. No
+interaction with the people involved, including unsolicited interaction with
+those enforcing the Code of Conduct, for a specified period of time. This
+includes avoiding interactions in community spaces as well as external channels
+like social media. Violating these terms may lead to a temporary or permanent
+ban.
+
+### 3. Temporary Ban
+
+**Community Impact**: A serious violation of community standards, including
+sustained inappropriate behavior.
+
+**Consequence**: A temporary ban from any sort of interaction or public
+communication with the community for a specified period of time. No public or
+private interaction with the people involved, including unsolicited interaction
+with those enforcing the Code of Conduct, is allowed during this period.
+Violating these terms may lead to a permanent ban.
+
+### 4. Permanent Ban
+
+**Community Impact**: Demonstrating a pattern of violation of community
+standards, including sustained inappropriate behavior, harassment of an
+individual, or aggression toward or disparagement of classes of individuals.
+
+**Consequence**: A permanent ban from any sort of public interaction within the
+community.
+
+## Attribution
+
+This Code of Conduct is adapted from the [Contributor Covenant][homepage],
+version 2.1, available at
+[https://www.contributor-covenant.org/version/2/1/code_of_conduct.html][v2.1].
+
+Community Impact Guidelines were inspired by
+[Mozilla's code of conduct enforcement ladder][Mozilla CoC].
+
+For answers to common questions about this code of conduct, see the FAQ at
+[https://www.contributor-covenant.org/faq][FAQ]. Translations are available at
+[https://www.contributor-covenant.org/translations][translations].
+
+[homepage]: https://www.contributor-covenant.org
+[v2.1]: https://www.contributor-covenant.org/version/2/1/code_of_conduct.html
+[Mozilla CoC]: https://github.com/mozilla/diversity
+[FAQ]: https://www.contributor-covenant.org/faq
+[translations]: https://www.contributor-covenant.org/translations

CONTRIBUTING.md

@@ -0,0 +1,73 @@
+# Contributing to Runic Gateway — Documentation
+
+Thanks for your interest in contributing! This repo is the **central
+documentation** for the Runic Gateway platform — design docs, the protocol spec,
+integration guides, and research, extracted from the code repos so they live in
+one place.
+
+By participating you agree to abide by our
+[Code of Conduct](CODE_OF_CONDUCT.md).
+
+## Ways to contribute
+
+- **Report an error** (something wrong, outdated, or unclear) or **request new
+  documentation** through the
+  [issue tracker](https://gitea.whitlocktech.com/RunicGateway/docs/issues)
+  (issue templates are provided).
+- **Fix or expand the docs** by opening a pull request (see below).
+- **Never** report a security vulnerability in a public issue — see
+  [SECURITY.md](SECURITY.md).
+
+## Working on the docs
+
+Everything here is Markdown — no build step. Just edit the relevant file and
+preview it in any Markdown viewer (or on Gitea).
+
+```
+website/   docs for the shard website (Node/Express + MariaDB + React/Vite)
+link/      docs for the ServUO bridge (C# plugin + Rust sidecar)
+```
+
+Guidelines:
+
+- Keep documents in the folder matching their subsystem (`website/` or `link/`).
+- These docs are the **authoritative** copy of the protocol and design; when you
+  change behavior in a code repo, update the matching doc here in the same or a
+  follow-up PR so the spec and implementation stay in sync.
+- Use relative links between docs, and check that any links you add resolve.
+- Prefer clear prose and tables over screenshots where possible.
+
+## Branch & PR workflow
+
+1. Branch from `main` with a descriptive name (`docs/…`, `fix/…`, `chore/…`).
+2. Keep changes focused; small PRs are easier to review.
+3. Push and open a pull request against `main`. Fill out the PR template,
+   including the **AI-assisted contributions** disclosure.
+4. A maintainer will review; address feedback with follow-up commits.
+
+### Commit messages
+
+We use [Conventional Commits](https://www.conventionalcommits.org/) —
+`type(scope): summary` (e.g. `docs(link): clarify town-crier caps`).
+
+## AI-assisted contributions (disclosure required)
+
+This project is developed openly with AI assistance, and we ask the same
+transparency of everyone. **If you used an AI tool** (Claude, Copilot, ChatGPT,
+Cursor, etc.) to help produce a contribution, you must disclose it:
+
+- Tick the AI-usage box in the pull-request template and name the tool(s).
+- Mark AI-authored commits with a trailer, e.g.
+  `Co-Authored-By: Claude <noreply@anthropic.com>` or `Assisted-By: <tool>`.
+- You remain responsible for every line you submit: review it, understand it,
+  and make sure it is accurate and that you have the right to contribute it.
+
+Disclosed AI assistance is welcome. Undisclosed AI-generated contributions are
+not, and may be closed.
+
+## License
+
+Runic Gateway is licensed under the **GNU General Public License v3.0 or later**
+(see [LICENSE.md](LICENSE.md)). By submitting a contribution you agree that it is
+licensed under the same terms (inbound = outbound) and that you have the right to
+contribute it.

CONTRIBUTORS.md

@@ -0,0 +1,31 @@
+# Contributors
+
+Runic Gateway is built and maintained by the people and tools listed here.
+Thank you to everyone who has contributed.
+
+## Maintainers
+
+- **whitlocktech** <whitlocktech@gmail.com> — project lead and maintainer
+
+## Contributors
+
+<!--
+  Add yourself here when your contribution is merged — alphabetical by name or
+  handle. One line each:
+
+  - **Name or handle** (optional link) — what you contributed
+-->
+
+- _Your name could be here — see [CONTRIBUTING.md](CONTRIBUTING.md)._
+
+## AI-assisted development
+
+Parts of Runic Gateway were developed with the assistance of AI coding tools,
+including **Claude** (Anthropic) via Claude Code. AI-assisted commits are
+attributed in their commit trailers (e.g. `Co-Authored-By: Claude ...`).
+
+In keeping with this project's transparency policy, **all contributors must
+disclose their use of AI tools** on any contribution — see the
+"AI-assisted contributions" section of [CONTRIBUTING.md](CONTRIBUTING.md).
+Disclosed AI assistance is welcome; undisclosed AI-generated contributions are
+not.

LICENSE

@@ -1,232 +0,0 @@
-GNU GENERAL PUBLIC LICENSE
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-How to Apply These Terms to Your New Programs
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-     Android-app
-     Copyright (C) 2026  RunicGateway
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LICENSE.md

@@ -0,0 +1,674 @@
+                    GNU GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+                            Preamble
+
+  The GNU General Public License is a free, copyleft license for
+software and other kinds of works.
+
+  The licenses for most software and other practical works are designed
+to take away your freedom to share and change the works.  By contrast,
+the GNU General Public License is intended to guarantee your freedom to
+share and change all versions of a program--to make sure it remains free
+software for all its users.  We, the Free Software Foundation, use the
+GNU General Public License for most of our software; it applies also to
+any other work released this way by its authors.  You can apply it to
+your programs, too.
+
+  When we speak of free software, we are referring to freedom, not
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+                     END OF TERMS AND CONDITIONS
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+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+  If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+    <program>  Copyright (C) <year>  <name of author>
+    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+  You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+<https://www.gnu.org/licenses/>.
+
+  The GNU General Public License does not permit incorporating your program
+into proprietary programs.  If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.  But first, please read
+<https://www.gnu.org/licenses/why-not-lgpl.html>.

README.md

@@ -1,2 +1,70 @@
-# Android-app
+<!-- SPDX-License-Identifier: GPL-3.0-or-later -->
+# Runic Gateway — Android app
 
+A native Android client for a Runic Gateway shard's **public site + player self-service**. It is
+**purely an API client of the website backend** — it never talks to the `link/` sidecar or the game
+shard directly, and it ships none of the shard/sidecar wiring. It surfaces the same content and
+player features as the website's browser client, **minus every administrative/management console**.
+
+The authoritative design contract is [`docs/android/PLAN.md`](https://gitea.whitlocktech.com/RunicGateway/docs)
+in the `RunicGateway/docs` repo. The authoritative API reference is the committed OpenAPI spec at
+`website/server/swagger/swagger-output.json`.
+
+## Status
+
+**M0 — repo scaffold.** Gradle + Compose + Hilt skeleton with CI (lint + unit test + debug build).
+The functional Kotlin pass (M1–M4) and the design pass (M5) follow — see the plan's milestones (§9).
+
+## Stack
+
+| Concern | Choice |
+|---|---|
+| Language / UI | Kotlin + Jetpack Compose (Material 3) |
+| Navigation | Navigation-Compose, single-activity |
+| HTTP | Retrofit + OkHttp, `kotlinx.serialization` |
+| Async | Coroutines + Flow |
+| DI | Hilt |
+| Prefs / base URL | Jetpack DataStore |
+| Tokens at rest | EncryptedSharedPreferences |
+| Images | Coil |
+| Min SDK | Android 10 (API 29) |
+| Target / compile SDK | 35 |
+
+Dependency and plugin versions are pinned in [`gradle/libs.versions.toml`](gradle/libs.versions.toml).
+
+## Build
+
+Requires **JDK 17** and the Android SDK (`ANDROID_HOME` / `local.properties`).
+
+```bash
+./gradlew assembleDebug     # build a debug APK -> app/build/outputs/apk/debug/
+./gradlew test              # JVM unit tests
+./gradlew lint              # Android lint
+./gradlew installDebug      # install on a connected device/emulator
+```
+
+The app self-configures its server URL on first run (PLAN.md §3), so a single build works against
+any shard's website — there is no compiled-in API host.
+
+## CI
+
+`.gitea/workflows/pr-checks.yml` gates PRs into `main` with `./gradlew lint test assembleDebug` on the
+org's self-hosted runner (JDK 17 + Android SDK). Debug builds are auto-signed, so the gate needs no
+secrets. **This pipeline is verified green end-to-end on the runner** (M0). A signed **release** APK
+attached to a Gitea release comes at M6.
+
+The workflow carries a few runner-specific accommodations (each explained in comments in the file),
+because this self-hosted runner differs from a stock GitHub runner:
+
+- **JDK 17 is installed via `apt`** (not `actions/setup-java`) — the runner can't resolve
+  `api.adoptium.net`, while the Ubuntu mirrors are reachable.
+- **SDK packages are installed explicitly** via `sdkmanager`, with `set +o pipefail` so `yes` dying of
+  `SIGPIPE` doesn't fail the step.
+- **`gradlew` is `chmod +x`'d in the run step** — the runner's checkout does not preserve the git
+  executable bit, so `./gradlew` alone fails with "Permission denied".
+
+## Contributing
+
+See [`CONTRIBUTING.md`](CONTRIBUTING.md). **AI-assisted contributions must be disclosed** (org
+policy): tick the PR box naming the tool and add a `Co-Authored-By` trailer to AI-authored commits.
+Licensed **GPL-3.0-or-later**.

SECURITY.md

@@ -0,0 +1,50 @@
+# Security Policy
+
+Thank you for helping keep Runic Gateway and its users safe.
+
+## Reporting a vulnerability
+
+**Please do not report security vulnerabilities through public issues, pull
+requests, or the wiki.** A public report tips off attackers before a fix is
+available.
+
+Instead, report privately by email to:
+
+**whitlocktech@gmail.com**
+
+Please include as much of the following as you can:
+
+- The repository and component affected.
+- The type of issue (e.g. authentication bypass, injection, secret exposure,
+  remote code execution, denial of service).
+- Step-by-step instructions to reproduce, and a proof-of-concept if you have one.
+- The impact — what an attacker could do with it.
+- Any suggested remediation.
+
+You will receive an acknowledgement of your report, typically within a few days.
+We will keep you informed as we investigate and work toward a fix, and we are
+happy to credit you in the release notes once the issue is resolved (let us know
+if you would prefer to remain anonymous).
+
+## Scope
+
+Runic Gateway is a self-hosted platform made up of several components:
+
+| Component | Repo | Network exposure |
+|---|---|---|
+| Website (site + admin + API) | `RunicGateway/website` | Internet-facing (behind a reverse proxy) |
+| uo-link sidecar | `RunicGateway/link` | The only network-facing part of the game bridge |
+| ServUO plugin | `RunicGateway/servuo-plugins` | Loopback only — dials the sidecar on `127.0.0.1` |
+| Documentation | `RunicGateway/docs` | Content only |
+
+Because instances are self-hosted, the security of any given deployment also
+depends on how it is configured and operated — strong secrets (`JWT_SECRET`,
+`SECRET_ENC_KEY`, database and admin passwords), a correctly configured reverse
+proxy and `TRUST_PROXY`, and keeping the shard itself unreachable from the
+internet (only the sidecar should be exposed). See each repo's README for the
+security model.
+
+## Supported versions
+
+This project is developed continuously and does not maintain long-term release
+branches. Security fixes land on `main`; please run a recent build.

app/build.gradle.kts

@@ -0,0 +1,172 @@
+// 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)
+    alias(libs.plugins.kotlin.compose)
+    alias(libs.plugins.kotlin.serialization)
+    alias(libs.plugins.ksp)
+    alias(libs.plugins.hilt)
+}
+
+// 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
+
+    defaultConfig {
+        // Target application id per docs/android/PLAN.md §13 (pending runicgateway.app domain).
+        applicationId = "com.runicgateway.app"
+        minSdk = 29
+        targetSdk = 35
+        // 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 {
+        release {
+            // 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")
+            }
+        }
+    }
+
+    compileOptions {
+        sourceCompatibility = JavaVersion.VERSION_17
+        targetCompatibility = JavaVersion.VERSION_17
+    }
+
+    kotlinOptions {
+        jvmTarget = "17"
+    }
+
+    buildFeatures {
+        compose = true
+        buildConfig = true
+    }
+
+    packaging {
+        resources {
+            excludes += "/META-INF/{AL2.0,LGPL2.1}"
+        }
+    }
+}
+
+dependencies {
+    // Core / lifecycle / activity
+    implementation(libs.androidx.core.ktx)
+    implementation(libs.androidx.lifecycle.runtime.ktx)
+    implementation(libs.androidx.lifecycle.runtime.compose)
+    implementation(libs.androidx.lifecycle.viewmodel.compose)
+    implementation(libs.androidx.activity.compose)
+
+    // Compose (BOM-managed versions)
+    implementation(platform(libs.androidx.compose.bom))
+    implementation(libs.androidx.compose.ui)
+    implementation(libs.androidx.compose.ui.graphics)
+    implementation(libs.androidx.compose.ui.tooling.preview)
+    implementation(libs.androidx.compose.material3)
+    implementation(libs.androidx.compose.material.icons.core)
+    implementation(libs.androidx.navigation.compose)
+    debugImplementation(libs.androidx.compose.ui.tooling)
+    debugImplementation(libs.androidx.compose.ui.test.manifest)
+
+    // DI
+    implementation(libs.hilt.android)
+    ksp(libs.hilt.compiler)
+    implementation(libs.androidx.hilt.navigation.compose)
+
+    // Networking (wired for M1+; declared now so the stack resolves)
+    implementation(libs.retrofit)
+    implementation(platform(libs.okhttp.bom))
+    implementation(libs.okhttp)
+    implementation(libs.okhttp.logging.interceptor)
+    implementation(libs.okhttp.sse)
+    implementation(libs.kotlinx.serialization.json)
+    implementation(libs.retrofit.kotlinx.serialization.converter)
+
+    // Storage
+    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)
+
+    // Unit tests
+    testImplementation(libs.junit)
+    testImplementation(libs.kotlinx.coroutines.test)
+
+    // Instrumented tests
+    androidTestImplementation(libs.androidx.test.ext.junit)
+    androidTestImplementation(libs.androidx.espresso.core)
+    androidTestImplementation(platform(libs.androidx.compose.bom))
+    androidTestImplementation(libs.androidx.compose.ui.test.junit4)
+}

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

@@ -0,0 +1,59 @@
+# 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/main/AndroidManifest.xml

@@ -0,0 +1,79 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- SPDX-License-Identifier: GPL-3.0-or-later -->
+<manifest xmlns:android="http://schemas.android.com/apk/res/android">
+
+    <!-- The app is purely an HTTPS API client of a shard's website backend. -->
+    <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"
+        android:dataExtractionRules="@xml/data_extraction_rules"
+        android:fullBackupContent="@xml/backup_rules"
+        android:icon="@mipmap/ic_launcher"
+        android:label="@string/app_name"
+        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

@@ -0,0 +1,128 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+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
+import com.runicgateway.app.ui.AppViewModel.AppState
+import com.runicgateway.app.ui.LocalAssetResolver
+import com.runicgateway.app.ui.RunicApp
+import com.runicgateway.app.ui.components.LoadingView
+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
+ * connect screen until a shard site is configured (§3), then the main app.
+ * The Material theme is seeded from the per-shard brand accent, and asset-path
+ * resolution is provided to the whole tree.
+ */
+@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)
+        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()
+
+            val accent = (state as? AppState.Ready)?.brand?.let { parseBrandColor(it.accent) }
+
+            RunicGatewayTheme(accent = accent) {
+                CompositionLocalProvider(LocalAssetResolver provides appViewModel::resolveAsset) {
+                    Surface(
+                        modifier = Modifier.fillMaxSize(),
+                        color = MaterialTheme.colorScheme.background,
+                    ) {
+                        when (val s = state) {
+                            AppState.Loading -> LoadingView()
+                            AppState.NeedsConnection ->
+                                ConnectScreen(onConnected = appViewModel::onConnected)
+                            is AppState.Ready ->
+                                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/RunicGatewayApp.kt

@@ -0,0 +1,15 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ * Runic Gateway — native Android client of a shard's website API.
+ */
+package com.runicgateway.app
+
+import android.app.Application
+import dagger.hilt.android.HiltAndroidApp
+
+/**
+ * Application entry point. Annotated for Hilt so the DI graph is available
+ * to activities, view models, and (from M1) repositories / API services.
+ */
+@HiltAndroidApp
+class RunicGatewayApp : Application()

app/src/main/java/com/runicgateway/app/core/AppConfig.kt

@@ -0,0 +1,14 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.core
+
+/**
+ * Build-derived flags, injected rather than read from `BuildConfig` directly so
+ * the logic that consumes them (URL validation, etc.) stays plain and unit-testable.
+ */
+data class AppConfig(
+    /** Allow plain HTTP base URLs. Debug-only (local dev); release requires HTTPS (§3). */
+    val allowInsecureHttp: Boolean,
+    val versionName: String,
+)

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/Session.kt

@@ -0,0 +1,60 @@
+/*
+ * 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
+}
+
+/**
+ * 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/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 +1,238 @@
+/*
+ * 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.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 java.util.concurrent.atomic.AtomicReference
+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}` lives only in memory: if the process is killed
+ * while the Custom Tab is foreground it is lost and the exchange **fails closed**
+ * (the user simply retries) — never a security downgrade.
+ *
+ * Threading: [buildStartUrl] runs on the UI thread; [complete] runs on the
+ * activity's coroutine scope after a deep link. The pending holder is an
+ * [AtomicReference] and [outcome] 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,
+) {
+
+    /** 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
+    }
+
+    private data class Pending(val state: String, val verifier: String)
+
+    private val pending = AtomicReference<Pending?>(null)
+
+    /**
+     * 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. Returns null when no shard site is configured yet
+     * (the caller then keeps the website hand-off fallback). 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()
+        pending.set(Pending(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 = pending.getAndSet(null)
+
+        // 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
+            }
+            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/BaseUrlHolder.kt

@@ -0,0 +1,40 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.core.net
+
+import okhttp3.HttpUrl
+import java.util.concurrent.atomic.AtomicReference
+import javax.inject.Inject
+import javax.inject.Singleton
+
+/**
+ * Holds the currently-selected shard website base URL (PLAN.md §3). The API host
+ * is not compiled in: it is chosen on first run, may be changed later under
+ * Settings → Server, and every outbound API request is retargeted onto it by
+ * [HostSelectionInterceptor].
+ *
+ * Threading: the value is read on every network call and written from the
+ * connect/settings flows, so it lives in an [AtomicReference].
+ */
+@Singleton
+class BaseUrlHolder @Inject constructor() {
+    private val ref = AtomicReference<HttpUrl?>(null)
+
+    /** The configured base, or null before first-run connect completes. */
+    val current: HttpUrl? get() = ref.get()
+
+    fun set(url: HttpUrl?) = ref.set(url)
+
+    companion object {
+        /**
+         * Sentinel host used as Retrofit's compile-time `baseUrl`. Relative
+         * endpoint paths resolve against it; [HostSelectionInterceptor] rewrites
+         * exactly these requests onto [current]. Absolute-URL probe requests use
+         * a real host and are left untouched. `.invalid` is reserved (RFC 6761)
+         * so it can never accidentally resolve on a network.
+         */
+        const val PLACEHOLDER_HOST = "runic-gateway.invalid"
+        const val PLACEHOLDER_BASE_URL = "https://$PLACEHOLDER_HOST/"
+    }
+}

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

@@ -0,0 +1,53 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.core.net
+
+import okhttp3.HttpUrl
+import okhttp3.Interceptor
+import okhttp3.Response
+import java.io.IOException
+import javax.inject.Inject
+import javax.inject.Singleton
+
+/**
+ * Retargets each relative API request onto the runtime-selected base URL
+ * (PLAN.md §3). Retrofit is built with a sentinel base host
+ * ([BaseUrlHolder.PLACEHOLDER_HOST]); this interceptor swaps the scheme/host/port
+ * for the configured shard site and prefixes any base path the user included
+ * (`https://host/base`). Absolute-URL requests (the connect probe via `@Url`)
+ * carry a real host and pass through untouched.
+ */
+@Singleton
+class HostSelectionInterceptor @Inject constructor(
+    private val baseUrlHolder: BaseUrlHolder,
+) : Interceptor {
+
+    override fun intercept(chain: Interceptor.Chain): Response {
+        val request = chain.request()
+        if (request.url.host != BaseUrlHolder.PLACEHOLDER_HOST) {
+            return chain.proceed(request)
+        }
+
+        val base = baseUrlHolder.current
+            ?: throw IOException("No shard website is configured yet.")
+
+        val rewritten = rewriteOntoBase(base, request.url)
+        return chain.proceed(request.newBuilder().url(rewritten).build())
+    }
+}
+
+/**
+ * Resolve the sentinel-hosted [requestUrl] against [base] the way a browser
+ * resolves a relative link. [base] is guaranteed to end in "/"
+ * (ServerUrl.normalize), so `https://host/base/` + `api/v1/x` yields
+ * `https://host/base/api/v1/x` — the base path prefix is preserved and no double
+ * slash appears. Extracted as a pure function for unit testing.
+ */
+fun rewriteOntoBase(base: HttpUrl, requestUrl: HttpUrl): HttpUrl {
+    val relative = buildString {
+        append(requestUrl.encodedPath.removePrefix("/"))
+        requestUrl.encodedQuery?.let { append('?').append(it) }
+    }
+    return base.resolve(relative) ?: base
+}

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/ServerUrl.kt

@@ -0,0 +1,78 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.core.net
+
+import okhttp3.HttpUrl
+import okhttp3.HttpUrl.Companion.toHttpUrlOrNull
+
+/**
+ * Parses and normalizes the base URL a user types on the first-run "Connect to
+ * your shard's website" screen (PLAN.md §3). Pure, dependency-light logic so it
+ * is exercised directly in JVM unit tests.
+ *
+ * Rules:
+ *  - accept `https://host[/base]`; a bare `host[/base]` gets an implicit scheme
+ *    (`https` normally, so users needn't type it);
+ *  - trim surrounding whitespace;
+ *  - require HTTPS unless [allowInsecureHttp] (release builds forbid HTTP; debug
+ *    allows it for local dev against `127.0.0.1:3000`);
+ *  - drop any query/fragment and guarantee a trailing slash on the path so the
+ *    stored value composes cleanly with relative endpoint paths.
+ */
+object ServerUrl {
+
+    sealed interface Result {
+        data class Valid(val url: HttpUrl) : Result
+        data class Invalid(val reason: Reason) : Result
+    }
+
+    enum class Reason {
+        /** Empty or whitespace-only input. */
+        BLANK,
+
+        /** Not a parseable http(s) URL (bad host, illegal characters, …). */
+        MALFORMED,
+
+        /** A scheme other than http/https (e.g. ftp://, ws://). */
+        UNSUPPORTED_SCHEME,
+
+        /** Plain HTTP where the build requires HTTPS. */
+        INSECURE,
+    }
+
+    fun normalize(raw: String, allowInsecureHttp: Boolean): Result {
+        val trimmed = raw.trim()
+        if (trimmed.isEmpty()) return Result.Invalid(Reason.BLANK)
+
+        // Give a scheme-less entry an implicit, secure default so users can type
+        // just "shard.example.com". An explicit but unsupported scheme is rejected.
+        val hasScheme = SCHEME_RE.containsMatchIn(trimmed)
+        val candidate = if (hasScheme) trimmed else "https://$trimmed"
+
+        val lowerScheme = candidate.substringBefore("://", "").lowercase()
+        if (hasScheme && lowerScheme != "http" && lowerScheme != "https") {
+            return Result.Invalid(Reason.UNSUPPORTED_SCHEME)
+        }
+
+        val parsed = candidate.toHttpUrlOrNull() ?: return Result.Invalid(Reason.MALFORMED)
+        if (parsed.host.isBlank()) return Result.Invalid(Reason.MALFORMED)
+
+        if (parsed.scheme == "http" && !allowInsecureHttp) {
+            return Result.Invalid(Reason.INSECURE)
+        }
+
+        // Rebuild without query/fragment and force a trailing slash so
+        // HttpUrl.resolve()/addPathSegments compose predictably later.
+        val path = parsed.encodedPath.trimEnd('/')
+        val normalized = parsed.newBuilder()
+            .encodedPath(if (path.isEmpty()) "/" else "$path/")
+            .query(null)
+            .fragment(null)
+            .build()
+
+        return Result.Valid(normalized)
+    }
+
+    private val SCHEME_RE = Regex("^[a-zA-Z][a-zA-Z0-9+.-]*://")
+}

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,
+) {
+    // 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.
+     */
+    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/net/UserAgentInterceptor.kt

@@ -0,0 +1,24 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.core.net
+
+import okhttp3.Interceptor
+import okhttp3.Response
+
+/**
+ * Sets a stable, identifiable User-Agent on every request. The website mounts a
+ * bot/scanner guard ahead of routing (PLAN.md §8); a native client must present
+ * a sane UA so it is not caught by the scanner heuristics that reject blank or
+ * default agents. Constructed with the app's UA string in the network module.
+ */
+class UserAgentInterceptor(
+    private val userAgent: String,
+) : Interceptor {
+    override fun intercept(chain: Interceptor.Chain): Response {
+        val request = chain.request().newBuilder()
+            .header("User-Agent", userAgent)
+            .build()
+        return chain.proceed(request)
+    }
+}

app/src/main/java/com/runicgateway/app/core/prefs/ServerPreferences.kt

@@ -0,0 +1,48 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.core.prefs
+
+import android.content.Context
+import androidx.datastore.core.DataStore
+import androidx.datastore.preferences.core.Preferences
+import androidx.datastore.preferences.core.edit
+import androidx.datastore.preferences.core.stringPreferencesKey
+import androidx.datastore.preferences.preferencesDataStore
+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.serverDataStore: DataStore<Preferences> by preferencesDataStore(name = "server")
+
+/**
+ * Persists the selected shard website base URL (PLAN.md §3). The base URL is
+ * non-sensitive, so it lives in plain DataStore; tokens (M3) will use
+ * EncryptedSharedPreferences instead, never this store.
+ */
+@Singleton
+class ServerPreferences @Inject constructor(
+    @param:dagger.hilt.android.qualifiers.ApplicationContext private val context: Context,
+) {
+    private val store = context.serverDataStore
+
+    /** Emits the saved base URL, or null before first-run connect completes. */
+    val baseUrl: Flow<String?> = store.data.map { it[KEY_BASE_URL] }
+
+    suspend fun currentBaseUrl(): String? = baseUrl.first()
+
+    suspend fun setBaseUrl(url: String) {
+        store.edit { it[KEY_BASE_URL] = url }
+    }
+
+    /** Clears the base URL — used by a Settings → Server switch (hard reset, §3). */
+    suspend fun clear() {
+        store.edit { it.remove(KEY_BASE_URL) }
+    }
+
+    private companion object {
+        val KEY_BASE_URL = stringPreferencesKey("base_url")
+    }
+}

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

@@ -0,0 +1,49 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.core.result
+
+import kotlinx.coroutines.CancellationException
+import retrofit2.HttpException
+import java.io.IOException
+
+/**
+ * The single result type every repository call returns (PLAN.md §7). The UI
+ * degrades gracefully on a down backend or shard: a repository never throws for
+ * an expected failure, it returns a typed variant the screen can render.
+ *
+ *  - [Ok]           — a 2xx response with a decoded body.
+ *  - [HttpError]    — the server answered with a non-2xx status.
+ *  - [NetworkError] — the request never got an answer (offline, DNS, TLS, timeout).
+ */
+sealed interface ApiResult<out T> {
+    data class Ok<T>(val data: T) : ApiResult<T>
+    data class HttpError(val status: Int, val message: String? = null) : ApiResult<Nothing>
+    data class NetworkError(val cause: Throwable) : ApiResult<Nothing>
+}
+
+/** True for the "shard/sidecar down" signal the player screens treat as offline (§6.3, §7). */
+fun ApiResult<*>.isShardUnavailable(): Boolean =
+    this is ApiResult.HttpError && status == 503
+
+/** Map an [ApiResult.Ok] body while preserving the failure variants unchanged. */
+inline fun <T, R> ApiResult<T>.map(transform: (T) -> R): ApiResult<R> = when (this) {
+    is ApiResult.Ok -> ApiResult.Ok(transform(data))
+    is ApiResult.HttpError -> this
+    is ApiResult.NetworkError -> this
+}
+
+/**
+ * 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.
+ */
+suspend fun <T> safeApiCall(block: suspend () -> T): ApiResult<T> = try {
+    ApiResult.Ok(block())
+} catch (e: CancellationException) {
+    throw e
+} catch (e: HttpException) {
+    ApiResult.HttpError(e.code(), e.message())
+} catch (e: IOException) {
+    ApiResult.NetworkError(e)
+}

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 +1,37 @@
+/*
+ * 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)
+
+    /** The website login page — carries the SSO provider buttons (§4.2). */
+    fun login(): String? = resolve(LOGIN)
+
+    private companion object {
+        const val REGISTER = "account/register"
+        const val FORGOT = "account/forgot"
+        const val LOGIN = "account/login"
+    }
+}

app/src/main/java/com/runicgateway/app/data/api/AuthApi.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.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.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.
+    @Headers("X-Runic-No-Session: 1")
+    @POST("api/v1/auth/mobile/login")
+    suspend fun login(@Body body: MobileLoginRequest): 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 +1,55 @@
+/*
+ * 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.TotpCodeRequest
+import com.runicgateway.app.data.api.dto.TotpSetupDto
+import com.runicgateway.app.data.api.dto.TotpStateDto
+import com.runicgateway.app.data.api.dto.UsernameResponse
+import retrofit2.http.Body
+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
+}

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

@@ -0,0 +1,131 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+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
+import com.runicgateway.app.data.api.dto.WikiSummaryDto
+import com.runicgateway.app.data.api.dto.WikiTagDto
+import retrofit2.http.Body
+import retrofit2.http.GET
+import retrofit2.http.POST
+import retrofit2.http.Path
+import retrofit2.http.Query
+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. 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 {
+
+    // ── First-run probe (absolute URL; bypasses host rewriting) ──────────
+    /**
+     * Validates a candidate site during the first-run connect flow (§3). Takes a
+     * fully-qualified URL so the request carries a real host and is left
+     * untouched by the host interceptor — the probe targets the URL the user
+     * just typed, not the (not-yet-configured) base.
+     */
+    @GET
+    suspend fun probeStatus(@Url absoluteStatusUrl: String): StatusDto
+
+    // ── Site status / settings ───────────────────────────────────────────
+    @GET("api/v1/public/status")
+    suspend fun getStatus(): StatusDto
+
+    @GET("api/v1/public/settings")
+    suspend fun getSettings(): SettingsDto
+
+    // ── News & content ───────────────────────────────────────────────────
+    @GET("api/v1/public/posts/{category}")
+    suspend fun getPosts(@Path("category") category: String): List<PostDto>
+
+    @GET("api/v1/public/posts/{category}/{idOrSlug}")
+    suspend fun getPost(
+        @Path("category") category: String,
+        @Path("idOrSlug") idOrSlug: String,
+    ): PostDto
+
+    @GET("api/v1/public/pages/{slug}")
+    suspend fun getPage(@Path("slug") slug: String): PageDto
+
+    // ── Wiki ─────────────────────────────────────────────────────────────
+    @GET("api/v1/public/wiki")
+    suspend fun getWikiPages(
+        @Query("q") query: String? = null,
+        @Query("category") category: String? = null,
+        @Query("tag") tag: String? = null,
+    ): List<WikiSummaryDto>
+
+    @GET("api/v1/public/wiki/categories")
+    suspend fun getWikiCategories(): List<WikiCategoryDto>
+
+    @GET("api/v1/public/wiki/tags")
+    suspend fun getWikiTags(): List<WikiTagDto>
+
+    @GET("api/v1/public/wiki/{slug}")
+    suspend fun getWikiPage(@Path("slug") slug: String): WikiPageDto
+
+    // ── 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 +1,68 @@
+/*
+ * 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. */
+@Serializable
+data class TotpStateDto(val totp_enabled: Boolean = false)
+
+/** 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/AuthDto.kt

@@ -0,0 +1,67 @@
+/*
+ * 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. [code] is only sent on the 2FA retry. */
+@Serializable
+data class MobileLoginRequest(
+    val username: String,
+    val password: String,
+    val code: 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.
+ */
+@Serializable
+data class MobileTokenResponse(
+    val accessToken: String,
+    val refreshToken: String,
+    val expiresIn: String? = null,
+    val user: SafeUserDto,
+)
+
+/** 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/ContactDto.kt

@@ -0,0 +1,26 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.data.api.dto
+
+import kotlinx.serialization.Serializable
+
+/** `POST /public/contact` request body. */
+@Serializable
+data class ContactRequest(
+    val name: String,
+    val email: String,
+    val message: String,
+)
+
+/**
+ * `POST /public/contact` response (website `mailer.sendContactMessage`). Either
+ * `{ sent: true }`, or `{ sent: false, fallback: "mailto", email }` when the
+ * site has no mailer configured and the user should email directly instead.
+ */
+@Serializable
+data class ContactResponse(
+    val sent: Boolean = false,
+    val fallback: String? = null,
+    val email: String? = null,
+)

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

@@ -0,0 +1,67 @@
+/*
+ * 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.
+ */
+@Serializable
+data class NotificationSubscriptionsDto(
+    val streams: List<String> = emptyList(),
+)

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

@@ -0,0 +1,38 @@
+/*
+ * 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.JsonObject
+
+/**
+ * `GET /public/pages/:slug` — a block-based CMS page (website `pages.model.js`
+ * `serialize`). Everything block-specific lives inside `props`; the renderer
+ * dispatches on `type`. `props` is left as a raw JSON object so new block types
+ * or props never break decoding — the renderer reads the keys it knows and
+ * ignores the rest.
+ */
+@Serializable
+data class PageDto(
+    val id: Long,
+    val slug: String = "",
+    val title: String = "",
+    val status: String = "",
+    val blocks: List<BlockDto> = emptyList(),
+    @SerialName("publishedAt") val publishedAt: String? = null,
+    @SerialName("updatedAt") val updatedAt: String? = null,
+)
+
+/**
+ * One CMS block. Known types (website `src/blocks/types`): `heading`,
+ * `rich_text`, `image`, `quote`, `cta`, `divider`, `two_column`. Container
+ * blocks (`two_column`) hold sub-block arrays inside their props.
+ */
+@Serializable
+data class BlockDto(
+    val type: String = "",
+    val props: JsonObject = JsonObject(emptyMap()),
+    val visible: Boolean = true,
+)

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"), unlike the numeric serials on
+ * the public boards — these are separate endpoints with separate shapes.
+ */
+
+// ── 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/PostDto.kt

@@ -0,0 +1,26 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.data.api.dto
+
+import kotlinx.serialization.SerialName
+import kotlinx.serialization.Serializable
+
+/**
+ * `GET /public/posts/:category` (list) and `/public/posts/:category/:idOrSlug`
+ * (detail). One shape serves both; the list omits nothing the app renders. The
+ * `body` (HTML) is present on the detail response and rendered there.
+ */
+@Serializable
+data class PostDto(
+    val id: Long,
+    /** Stored DB category (`news | five_on_friday | newsletter | screenshot`). */
+    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,
+    @SerialName("published_at") val publishedAt: String? = null,
+    @SerialName("created_at") val createdAt: String? = null,
+)

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

@@ -0,0 +1,83 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.data.api.dto
+
+import kotlinx.serialization.SerialName
+import kotlinx.serialization.Serializable
+
+/**
+ * DTOs for the public site/identity endpoints. Shapes mirror the backend
+ * responses (website `public.controller.js` + `settings.model.js`); unknown
+ * keys are ignored by the JSON parser so additive backend fields never break
+ * decoding (PLAN.md §8 "additive, v1").
+ */
+
+/** `GET /public/version` and the `version` block embedded in `/public/status`. */
+@Serializable
+data class VersionDto(
+    val service: String = "",
+    val api: String = "",
+    val server: String = "",
+)
+
+/** `GET /public/status` — site mode + version for the first-run probe (§3). */
+@Serializable
+data class StatusDto(
+    val mode: String = "live",
+    @SerialName("status_message") val statusMessage: String = "",
+    val version: VersionDto = VersionDto(),
+) {
+    val isMaintenance: Boolean get() = mode.equals("maintenance", ignoreCase = true)
+}
+
+/** Per-shard branding block the app themes itself from (§3, §6.1). */
+@Serializable
+data class BrandDto(
+    val name: String = "",
+    val shortName: String = "",
+    val tagline: String = "",
+    val description: String? = null,
+    val contactEmail: String = "",
+    val url: String = "",
+    /** Seed/accent color as a hex string, e.g. "#7f99bd". */
+    val accent: String = "",
+    /** Asset URL or site-relative path; empty = none. Resolve against the base URL. */
+    val logo: String = "",
+    val hero: String = "",
+    val favicon: String = "",
+)
+
+/** Derived, public-safe registration availability flags. */
+@Serializable
+data class RegistrationFlagsDto(
+    val password: Boolean = false,
+    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.
+ */
+@Serializable
+data class SettingsDto(
+    @SerialName("site_title") val siteTitle: String? = null,
+    @SerialName("status_message") val statusMessage: String? = null,
+    @SerialName("maintenance_message") val maintenanceMessage: String? = null,
+    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 +1,169 @@
+/*
+ * 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. */
+@Serializable
+data class ActorDto(
+    val serial: Long? = null,
+    val name: String? = null,
+    val acct: String? = null,
+    val webId: Long? = 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: Long? = 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: Long = 0,
+    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: Long = 0,
+    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/api/dto/WikiDto.kt

@@ -0,0 +1,76 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.data.api.dto
+
+import kotlinx.serialization.SerialName
+import kotlinx.serialization.Serializable
+
+/**
+ * Wiki DTOs (website `wiki.model.js` / `wiki.db.js`). The list route returns
+ * lighter summary rows (no body); the detail route returns the full page plus
+ * its tags, backlinks, and unresolved ("red") link targets.
+ */
+
+/** `GET /public/wiki` — a summary row (body omitted). */
+@Serializable
+data class WikiSummaryDto(
+    val id: Long,
+    val slug: String = "",
+    val title: String = "",
+    val excerpt: String? = null,
+    @SerialName("category_slug") val categorySlug: String? = null,
+    @SerialName("category_title") val categoryTitle: String? = null,
+    @SerialName("updated_at") val updatedAt: String? = null,
+    @SerialName("published_at") val publishedAt: String? = null,
+)
+
+/** `GET /public/wiki/:slug` — full page + tags/backlinks. */
+@Serializable
+data class WikiPageDto(
+    val id: Long,
+    val slug: String = "",
+    val title: String = "",
+    val body: String? = null,
+    val excerpt: String? = null,
+    @SerialName("category_slug") val categorySlug: String? = null,
+    @SerialName("category_title") val categoryTitle: String? = null,
+    @SerialName("updated_at") val updatedAt: String? = null,
+    @SerialName("published_at") val publishedAt: String? = null,
+    val tags: List<WikiTagRefDto> = emptyList(),
+    val backlinks: List<WikiBacklinkDto> = emptyList(),
+    @SerialName("missing_links") val missingLinks: List<String> = emptyList(),
+)
+
+/** A tag as attached to a page (slug + label only). */
+@Serializable
+data class WikiTagRefDto(
+    val slug: String = "",
+    val label: String = "",
+)
+
+/** A page that links to the current page. */
+@Serializable
+data class WikiBacklinkDto(
+    val slug: String = "",
+    val title: String = "",
+)
+
+/** `GET /public/wiki/categories`. */
+@Serializable
+data class WikiCategoryDto(
+    val id: Long,
+    val slug: String = "",
+    val title: String = "",
+    val description: String? = null,
+    @SerialName("published_count") val publishedCount: Long = 0,
+)
+
+/** `GET /public/wiki/tags`. */
+@Serializable
+data class WikiTagDto(
+    val id: Long,
+    val slug: String = "",
+    val label: String = "",
+    @SerialName("published_count") val publishedCount: Long = 0,
+)

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

@@ -0,0 +1,51 @@
+/*
+ * 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.TotpCodeRequest
+import com.runicgateway.app.data.api.dto.TotpSetupDto
+import com.runicgateway.app.data.api.dto.TotpStateDto
+import com.runicgateway.app.data.api.dto.UsernameResponse
+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,
+) {
+    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) }
+}

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

@@ -0,0 +1,143 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.data.repository
+
+import com.runicgateway.app.core.auth.SessionManager
+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 kotlinx.coroutines.CancellationException
+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 json: Json,
+) {
+
+    /**
+     * The shard's enabled SSO providers for the native login buttons (§4.2). Public
+     * discovery, never secrets. Returns an empty list on any failure — the login
+     * screen then keeps the website hand-off fallback rather than showing nothing.
+     */
+    suspend fun ssoProviders(): List<SsoProviderDto> = try {
+        ssoApi.providers()
+    } catch (e: CancellationException) {
+        throw e
+    } catch (_: Exception) {
+        emptyList()
+    }
+
+    /** Outcome of a login attempt (§4.1). */
+    sealed interface LoginResult {
+        data object Success : 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
+    }
+
+    suspend fun login(username: String, password: String, code: String? = null): LoginResult {
+        val response: Response<MobileTokenResponse> = try {
+            authApi.login(MobileLoginRequest(username = username, password = password, code = code))
+        } catch (e: CancellationException) {
+            throw e
+        } catch (_: IOException) {
+            return LoginResult.NetworkError
+        }
+
+        if (response.isSuccessful) {
+            val body = response.body() ?: return LoginResult.ServerError
+            sessionManager.onSignedIn(body.accessToken, body.refreshToken, body.user)
+            return LoginResult.Success
+        }
+
+        return when (response.code()) {
+            401 -> if (isTotpRequired(response)) LoginResult.TotpRequired else LoginResult.InvalidCredentials
+            429 -> LoginResult.RateLimited
+            else -> LoginResult.ServerError
+        }
+    }
+
+    /**
+     * 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
+    }
+}

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

@@ -0,0 +1,147 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.data.repository
+
+import com.runicgateway.app.core.auth.SessionManager
+import com.runicgateway.app.core.net.BaseUrlHolder
+import com.runicgateway.app.core.net.ServerUrl
+import com.runicgateway.app.core.prefs.ServerPreferences
+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.StatusDto
+import okhttp3.HttpUrl.Companion.toHttpUrlOrNull
+import javax.inject.Inject
+import javax.inject.Singleton
+
+/**
+ * Owns the shard website base-URL lifecycle (PLAN.md §3): restoring a saved URL
+ * on launch, validating + persisting a candidate on the first-run connect
+ * screen, and the hard reset performed by a Settings → Server switch.
+ */
+@Singleton
+class ConnectionRepository @Inject constructor(
+    private val api: PublicApi,
+    private val prefs: ServerPreferences,
+    private val baseUrlHolder: BaseUrlHolder,
+    private val sessionManager: SessionManager,
+    private val pushManager: com.runicgateway.app.core.push.PushManager,
+    private val config: com.runicgateway.app.core.AppConfig,
+) {
+
+    /** Outcome of validating a candidate base URL against a live site. */
+    sealed interface ProbeResult {
+        data class Success(val status: StatusDto) : ProbeResult
+        data class InvalidUrl(val reason: ServerUrl.Reason) : ProbeResult
+
+        /** 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
+    }
+
+    /** True once a saved base URL has been loaded into the holder. */
+    val isConnected: Boolean get() = baseUrlHolder.current != null
+
+    /**
+     * Restore any saved base URL into the holder on launch. Returns true if the
+     * app already has a configured shard site (skip the connect screen).
+     */
+    suspend fun restore(): Boolean {
+        val saved = prefs.currentBaseUrl()?.toHttpUrlOrNull()
+        baseUrlHolder.set(saved)
+        return saved != null
+    }
+
+    /**
+     * Validate [rawUrl], and on success persist it and activate it for all
+     * subsequent API calls. Insecure HTTP is allowed only in debug builds
+     * (local dev against 127.0.0.1); release builds require HTTPS.
+     */
+    suspend fun probeAndConnect(rawUrl: String): ProbeResult {
+        val normalized = when (val r = ServerUrl.normalize(rawUrl, allowInsecureHttp = config.allowInsecureHttp)) {
+            is ServerUrl.Result.Invalid -> return ProbeResult.InvalidUrl(r.reason)
+            is ServerUrl.Result.Valid -> r.url
+        }
+
+        val statusUrl = normalized.resolve("api/v1/public/status")?.toString()
+            ?: return ProbeResult.InvalidUrl(ServerUrl.Reason.MALFORMED)
+
+        return when (val result = safeApiCall { api.probeStatus(statusUrl) }) {
+            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)
+        }
+    }
+
+    /**
+     * 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()
+        prefs.clear()
+        baseUrlHolder.set(null)
+    }
+
+    /** 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/ContactRepository.kt

@@ -0,0 +1,24 @@
+/*
+ * 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.PublicApi
+import com.runicgateway.app.data.api.dto.ContactRequest
+import com.runicgateway.app.data.api.dto.ContactResponse
+import javax.inject.Inject
+import javax.inject.Singleton
+
+/**
+ * Contact form submission (PLAN.md §6.1). The endpoint is rate-limited; the
+ * caller handles `429` (too many) and `502` (mailer down) via [ApiResult.HttpError].
+ */
+@Singleton
+class ContactRepository @Inject constructor(
+    private val api: PublicApi,
+) {
+    suspend fun send(name: String, email: String, message: String): ApiResult<ContactResponse> =
+        safeApiCall { api.postContact(ContactRequest(name = name, email = email, message = message)) }
+}

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

@@ -0,0 +1,43 @@
+/*
+ * 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.PublicApi
+import com.runicgateway.app.data.api.dto.PageDto
+import com.runicgateway.app.data.api.dto.PostDto
+import javax.inject.Inject
+import javax.inject.Singleton
+
+/**
+ * News posts and CMS pages (PLAN.md §6.1). URL post categories map 1:1 to the
+ * backend's route segments (`news | five-on-friday | newsletter | screenshots`).
+ */
+@Singleton
+class ContentRepository @Inject constructor(
+    private val api: PublicApi,
+) {
+    /** Known URL categories, in display order. */
+    enum class PostCategory(val urlSlug: String) {
+        NEWS("news"),
+        FIVE_ON_FRIDAY("five-on-friday"),
+        NEWSLETTER("newsletter"),
+        SCREENSHOTS("screenshots"),
+        ;
+
+        companion object {
+            fun fromUrlSlug(slug: String?): PostCategory? = entries.firstOrNull { it.urlSlug == slug }
+        }
+    }
+
+    suspend fun getPosts(category: PostCategory): ApiResult<List<PostDto>> =
+        safeApiCall { api.getPosts(category.urlSlug) }
+
+    suspend fun getPost(category: PostCategory, idOrSlug: String): ApiResult<PostDto> =
+        safeApiCall { api.getPost(category.urlSlug, idOrSlug) }
+
+    suspend fun getPage(slug: String): ApiResult<PageDto> =
+        safeApiCall { api.getPage(slug) }
+}

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/SettingsRepository.kt

@@ -0,0 +1,22 @@
+/*
+ * 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.PublicApi
+import com.runicgateway.app.data.api.dto.SettingsDto
+import com.runicgateway.app.data.api.dto.StatusDto
+import javax.inject.Inject
+import javax.inject.Singleton
+
+/** Site status (mode/maintenance) and settings/branding (PLAN.md §6.1). */
+@Singleton
+class SettingsRepository @Inject constructor(
+    private val api: PublicApi,
+) {
+    suspend fun getStatus(): ApiResult<StatusDto> = safeApiCall { api.getStatus() }
+
+    suspend fun getSettings(): ApiResult<SettingsDto> = safeApiCall { api.getSettings() }
+}

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.ShardStreamClient
+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: ShardStreamClient,
+    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/data/repository/WikiRepository.kt

@@ -0,0 +1,37 @@
+/*
+ * 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.PublicApi
+import com.runicgateway.app.data.api.dto.WikiCategoryDto
+import com.runicgateway.app.data.api.dto.WikiPageDto
+import com.runicgateway.app.data.api.dto.WikiSummaryDto
+import com.runicgateway.app.data.api.dto.WikiTagDto
+import javax.inject.Inject
+import javax.inject.Singleton
+
+/** Wiki listing/filtering, categories, tags, and detail (PLAN.md §6.1). */
+@Singleton
+class WikiRepository @Inject constructor(
+    private val api: PublicApi,
+) {
+    /** Full-text [query] takes precedence over [category]/[tag] on the backend. */
+    suspend fun getPages(
+        query: String? = null,
+        category: String? = null,
+        tag: String? = null,
+    ): ApiResult<List<WikiSummaryDto>> =
+        safeApiCall { api.getWikiPages(query?.takeIf { it.isNotBlank() }, category, tag) }
+
+    suspend fun getCategories(): ApiResult<List<WikiCategoryDto>> =
+        safeApiCall { api.getWikiCategories() }
+
+    suspend fun getTags(): ApiResult<List<WikiTagDto>> =
+        safeApiCall { api.getWikiTags() }
+
+    suspend fun getPage(slug: String): ApiResult<WikiPageDto> =
+        safeApiCall { api.getWikiPage(slug) }
+}

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

@@ -0,0 +1,24 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.di
+
+import com.runicgateway.app.BuildConfig
+import com.runicgateway.app.core.AppConfig
+import dagger.Module
+import dagger.Provides
+import dagger.hilt.InstallIn
+import dagger.hilt.components.SingletonComponent
+import javax.inject.Singleton
+
+@Module
+@InstallIn(SingletonComponent::class)
+object AppModule {
+
+    @Provides
+    @Singleton
+    fun provideAppConfig(): AppConfig = AppConfig(
+        allowInsecureHttp = BuildConfig.DEBUG,
+        versionName = BuildConfig.VERSION_NAME,
+    )
+}

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

@@ -0,0 +1,146 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+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.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.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
+import dagger.hilt.components.SingletonComponent
+import kotlinx.serialization.json.Json
+import okhttp3.MediaType.Companion.toMediaType
+import okhttp3.OkHttpClient
+import okhttp3.logging.HttpLoggingInterceptor
+import retrofit2.Retrofit
+import javax.inject.Singleton
+
+@Module
+@InstallIn(SingletonComponent::class)
+object NetworkModule {
+
+    @Provides
+    @Singleton
+    fun provideJson(): Json = Json {
+        // Additive backend fields (§8) must never break decoding; be lenient.
+        ignoreUnknownKeys = true
+        explicitNulls = false
+        coerceInputValues = true
+    }
+
+    @Provides
+    @Singleton
+    fun provideUserAgentInterceptor(): UserAgentInterceptor {
+        // Identifiable UA so the site's scanner guard (§8) doesn't reject the app.
+        val ua = "RunicGatewayApp/${BuildConfig.VERSION_NAME} (Android ${Build.VERSION.RELEASE})"
+        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()
+            .addInterceptor(userAgentInterceptor)
+            .addInterceptor(hostSelectionInterceptor)
+            .addInterceptor(authInterceptor)
+            .authenticator(tokenAuthenticator)
+
+        if (BuildConfig.DEBUG) {
+            builder.addInterceptor(
+                HttpLoggingInterceptor().apply { level = HttpLoggingInterceptor.Level.BASIC },
+            )
+        }
+        return builder.build()
+    }
+
+    @Provides
+    @Singleton
+    fun provideRetrofit(client: OkHttpClient, json: Json): Retrofit =
+        Retrofit.Builder()
+            // Compile-time sentinel; every relative call is rewritten onto the
+            // runtime-selected shard site by HostSelectionInterceptor (§3).
+            .baseUrl(BaseUrlHolder.PLACEHOLDER_BASE_URL)
+            .client(client)
+            .addConverterFactory(json.asConverterFactory("application/json".toMediaType()))
+            .build()
+
+    @Provides
+    @Singleton
+    fun providePublicApi(retrofit: Retrofit): PublicApi = retrofit.create(PublicApi::class.java)
+
+    @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)
+
+    /**
+     * 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 +1,22 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.di
+
+import com.runicgateway.app.core.auth.EncryptedTokenStore
+import com.runicgateway.app.core.auth.TokenStore
+import dagger.Binds
+import dagger.Module
+import dagger.hilt.InstallIn
+import dagger.hilt.components.SingletonComponent
+import javax.inject.Singleton
+
+/** Binds the at-rest token store to its EncryptedSharedPreferences impl (§4.3). */
+@Module
+@InstallIn(SingletonComponent::class)
+abstract class StorageModule {
+
+    @Binds
+    @Singleton
+    abstract fun bindTokenStore(impl: EncryptedTokenStore): TokenStore
+}

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

@@ -0,0 +1,93 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+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
+import com.runicgateway.app.data.repository.SettingsRepository
+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
+
+/**
+ * Top-level app gate (PLAN.md §3): decides whether the first-run connect screen
+ * or the main UI shows, and holds the per-shard branding the theme is seeded
+ * from. Activity-scoped so the whole app observes one state.
+ */
+@HiltViewModel
+class AppViewModel @Inject constructor(
+    private val connectionRepository: ConnectionRepository,
+    private val settingsRepository: SettingsRepository,
+    private val baseUrlHolder: BaseUrlHolder,
+    private val pushManager: PushManager,
+) : ViewModel() {
+
+    sealed interface AppState {
+        /** Restoring the saved base URL / loading branding. */
+        data object Loading : AppState
+
+        /** No shard site configured yet — show the connect screen. */
+        data object NeedsConnection : AppState
+
+        /** A site is configured; [brand] is null if branding couldn't be loaded (still usable). */
+        data class Ready(val brand: BrandDto?) : AppState
+    }
+
+    private val _state = MutableStateFlow<AppState>(AppState.Loading)
+    val state: StateFlow<AppState> = _state.asStateFlow()
+
+    init {
+        viewModelScope.launch {
+            _state.value = if (connectionRepository.restore()) {
+                AppState.Ready(loadBrand())
+            } else {
+                AppState.NeedsConnection
+            }
+        }
+    }
+
+    /** Called by the connect screen once a site has been validated + saved. */
+    fun onConnected() {
+        viewModelScope.launch { _state.value = AppState.Ready(loadBrand()) }
+    }
+
+    /** Settings → Server switch: hard reset back to the connect screen (§3). */
+    fun changeServer() {
+        viewModelScope.launch {
+            connectionRepository.disconnect()
+            _state.value = AppState.NeedsConnection
+        }
+    }
+
+    /**
+     * 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)
+     * to an absolute URL against the configured base (§8: asset fields may be
+     * site-relative). Absolute URLs pass through unchanged; null/blank stays null.
+     */
+    fun resolveAsset(path: String?): String? {
+        if (path.isNullOrBlank()) return null
+        val base = baseUrlHolder.current ?: return path
+        return base.resolve(path)?.toString() ?: path
+    }
+}
+

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

@@ -0,0 +1,18 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.ui
+
+import androidx.compose.runtime.staticCompositionLocalOf
+
+/**
+ * Resolves possibly site-relative asset paths (post images, branding) to
+ * absolute URLs against the configured base URL. Provided at the app root from
+ * [AppViewModel.resolveAsset] so any screen or CMS block can turn a stored path
+ * into a loadable URL without reaching into the network layer.
+ */
+val LocalAssetResolver = staticCompositionLocalOf<(String?) -> String?> {
+    // Default: identity. Overridden at the app root; this fallback keeps previews
+    // and tests from crashing if the provider is missing.
+    { it }
+}

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

@@ -0,0 +1,383 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.ui
+
+import androidx.compose.foundation.layout.Spacer
+import androidx.compose.foundation.layout.height
+import androidx.compose.foundation.layout.padding
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.automirrored.filled.ArrowBack
+import androidx.compose.material.icons.filled.Menu
+import androidx.compose.material3.DrawerValue
+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
+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
+import androidx.navigation.compose.composable
+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.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.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
+
+/** Destinations that show the drawer (hamburger); others show a back arrow. */
+private val TOP_LEVEL_ROUTES = setOf(
+    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,
+)
+
+/**
+ * The main app shell once a shard site is configured (PLAN.md §5): one shared,
+ * 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
+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(drawerContainerColor = MaterialTheme.colorScheme.surfaceVariant) {
+                val drawerItemColors = NavigationDrawerItemDefaults.colors(
+                    selectedContainerColor = MaterialTheme.colorScheme.secondaryContainer,
+                    selectedTextColor = MaterialTheme.colorScheme.onSecondaryContainer,
+                    unselectedTextColor = MaterialTheme.colorScheme.onSurface,
+                )
+                Spacer(Modifier.height(12.dp))
+                Text(
+                    text = brand?.name?.takeIf { it.isNotBlank() } ?: stringResource(R.string.app_name),
+                    style = MaterialTheme.typography.titleLarge,
+                    color = MaterialTheme.colorScheme.onSurface,
+                    modifier = Modifier.padding(horizontal = 24.dp, vertical = 12.dp),
+                )
+                HorizontalDivider()
+                Spacer(Modifier.height(8.dp))
+                entries.forEach { entry ->
+                    NavigationDrawerItem(
+                        label = { Text(stringResource(entry.labelRes)) },
+                        selected = currentRoute == entry.route,
+                        onClick = {
+                            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,
+                    onClick = {
+                        scope.launch { drawerState.close() }
+                        onChangeServer()
+                    },
+                    colors = drawerItemColors,
+                    modifier = Modifier.padding(NavigationDrawerItemDefaults.ItemPadding),
+                )
+            }
+        },
+    ) {
+        Scaffold(
+            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(
+                            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 = {
+                        if (isTopLevel) {
+                            IconButton(onClick = { scope.launch { drawerState.open() } }) {
+                                Icon(Icons.Filled.Menu, stringResource(R.string.nav_open_menu))
+                            }
+                        } else {
+                            IconButton(onClick = { navController.popBackStack() }) {
+                                Icon(
+                                    Icons.AutoMirrored.Filled.ArrowBack,
+                                    stringResource(R.string.action_back),
+                                )
+                            }
+                        }
+                    },
+                )
+            },
+        ) { innerPadding ->
+            RunicNavHost(
+                navController = navController,
+                brand = brand,
+                session = session,
+                onSignOut = { sessionViewModel.signOut() },
+                onSignOutEverywhere = { sessionViewModel.signOut(allDevices = true) },
+                modifier = Modifier.padding(innerPadding),
+            )
+        }
+    }
+}
+
+@Composable
+private fun RunicNavHost(
+    navController: NavHostController,
+    brand: BrandDto?,
+    session: Session,
+    onSignOut: () -> Unit,
+    onSignOutEverywhere: () -> Unit,
+    modifier: Modifier = Modifier,
+) {
+    NavHost(
+        navController = navController,
+        startDestination = Routes.HOME,
+        modifier = modifier,
+    ) {
+        composable(Routes.HOME) {
+            HomeScreen(brand = brand)
+        }
+        composable(Routes.NEWS) {
+            NewsScreen(onOpenPost = { category, idOrSlug ->
+                navController.navigate(Routes.post(category, idOrSlug))
+            })
+        }
+        composable(
+            route = Routes.POST,
+            arguments = listOf(
+                navArgument(Routes.Args.CATEGORY) { type = NavType.StringType },
+                navArgument(Routes.Args.ID_OR_SLUG) { type = NavType.StringType },
+            ),
+        ) {
+            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)) })
+        }
+        composable(
+            route = Routes.WIKI_PAGE,
+            arguments = listOf(navArgument(Routes.Args.SLUG) { type = NavType.StringType }),
+        ) {
+            WikiPageScreen(onOpenPage = { slug -> navController.navigate(Routes.wikiPage(slug)) })
+        }
+        composable(
+            route = Routes.PAGE,
+            arguments = listOf(navArgument(Routes.Args.SLUG) { type = NavType.StringType }),
+        ) {
+            PageScreen()
+        }
+        composable(Routes.CONTACT) {
+            ContactScreen()
+        }
+        composable(Routes.LOGIN) {
+            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,
+                )
+                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() }
+        }
+    }
+}
+
+/**
+ * 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) }
+    }
+}
+
+/** Navigate to a top-level menu destination: single instance, reset to it. */
+private fun NavHostController.navigateTopLevel(route: String) {
+    navigate(route) {
+        popUpTo(Routes.HOME) { saveState = true }
+        launchSingleTop = true
+        restoreState = true
+    }
+}

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

@@ -0,0 +1,54 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.ui
+
+import com.runicgateway.app.core.result.ApiResult
+
+/**
+ * The load state a screen renders. View models expose a `StateFlow<UiState<T>>`;
+ * the Compose layer renders loading / content / error+retry from it (PLAN.md §7:
+ * clean loading/error/retry states, no crash on a down backend).
+ */
+sealed interface UiState<out T> {
+    data object Loading : UiState<Nothing>
+    data class Success<T>(val data: T) : UiState<T>
+    data class Error(val kind: ErrorKind, val httpStatus: Int? = null) : UiState<Nothing>
+}
+
+/**
+ * Coarse failure buckets the UI turns into a friendly message + retry. Kept
+ * transport-agnostic so a screen picks the right copy without inspecting raw
+ * exceptions or status codes.
+ */
+enum class ErrorKind {
+    /** No answer from the backend — offline, DNS, TLS, timeout. */
+    NETWORK,
+
+    /** Requested item doesn't exist (404). */
+    NOT_FOUND,
+
+    /** Too many requests (429) — back off and retry shortly. */
+    RATE_LIMITED,
+
+    /** Shard/sidecar down (503) — shard reads only; render as offline (§6.3). */
+    SHARD_OFFLINE,
+
+    /** Any other non-2xx server response. */
+    SERVER,
+}
+
+/** Fold an [ApiResult] into a [UiState], mapping known statuses to [ErrorKind]s. */
+fun <T> ApiResult<T>.toUiState(): UiState<T> = when (this) {
+    is ApiResult.Ok -> UiState.Success(data)
+    is ApiResult.NetworkError -> UiState.Error(ErrorKind.NETWORK)
+    is ApiResult.HttpError -> UiState.Error(
+        kind = when (status) {
+            404 -> ErrorKind.NOT_FOUND
+            429 -> ErrorKind.RATE_LIMITED
+            503 -> ErrorKind.SHARD_OFFLINE
+            else -> ErrorKind.SERVER
+        },
+        httpStatus = status,
+    )
+}

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

@@ -0,0 +1,362 @@
+/*
+ * 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,
+    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)
+
+        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)
+        }
+
+        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,
+) {
+    UsernameSection(account, state, viewModel)
+    PasswordSection(account, state, viewModel)
+    TwoFactorSection(account, state, viewModel)
+    IdentitiesSection(state, viewModel)
+}
+
+@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 +1,185 @@
+/*
+ * 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,
+        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 (accountRepository.totpEnable(code.trim())) {
+                is ApiResult.Ok -> {
+                    _state.update { it.copy(totpSetup = null) }
+                    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)
+            }
+        }
+    }
+
+    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 +1,211 @@
+/*
+ * 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.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.text.KeyboardActions
+import androidx.compose.foundation.text.KeyboardOptions
+import androidx.compose.foundation.verticalScroll
+import androidx.compose.material3.Button
+import androidx.compose.material3.CircularProgressIndicator
+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.LaunchedEffect
+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.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) {
+            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),
+            )
+        }
+
+        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 button per enabled provider that opens the
+        // Custom-Tab bridge and returns the user signed in. Falls back to the
+        // website login hand-off when the shard exposes no providers.
+        if (state.ssoProviders.isNotEmpty()) {
+            state.ssoProviders.forEach { provider ->
+                OutlinedButton(
+                    onClick = { viewModel.onSsoProviderClick(provider) },
+                    enabled = !state.submitting,
+                    modifier = Modifier
+                        .fillMaxWidth()
+                        .padding(top = 12.dp),
+                ) {
+                    Text(stringResource(R.string.login_sso_provider, provider.name))
+                }
+            }
+        } else {
+            viewModel.ssoLoginUrl?.let { url ->
+                TextButton(onClick = { WebHandoff.open(context, url) }) {
+                    Text(stringResource(R.string.login_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))
+            }
+        }
+    }
+}
+
+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 +1,158 @@
+/*
+ * 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 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 = "",
+        /** True once the account is known to have 2FA on — reveal the code field. */
+        val totpRequired: Boolean = false,
+        val submitting: Boolean = false,
+        val error: LoginError? = null,
+        val signedIn: Boolean = false,
+        /** The shard's enabled SSO providers (§4.2); empty → website hand-off fallback. */
+        val ssoProviders: List<SsoProviderDto> = emptyList(),
+        /** 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 {
+        // Discover the native SSO providers to render buttons for (§4.2).
+        viewModelScope.launch {
+            val providers = authRepository.ssoProviders()
+            if (providers.isNotEmpty()) _state.update { it.copy(ssoProviders = providers) }
+        }
+        // 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) }
+
+    val registerUrl: String? get() = websiteUrls.register()
+    val forgotPasswordUrl: String? get() = websiteUrls.forgotPassword()
+
+    /** Website login hand-off — the fallback when native SSO discovery is empty (§4.2). */
+    val ssoLoginUrl: String? get() = websiteUrls.login()
+
+    /**
+     * 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
+        if (s.username.isBlank() || s.password.isBlank()) {
+            _state.update { it.copy(error = LoginError.INVALID_CREDENTIALS) }
+            return
+        }
+        // If 2FA is being requested, a code must accompany the resubmit.
+        if (s.totpRequired && s.code.isBlank()) {
+            _state.update { it.copy(error = LoginError.BAD_CODE) }
+            return
+        }
+
+        _state.update { it.copy(submitting = true, error = null) }
+        viewModelScope.launch {
+            val code = s.code.trim().takeIf { it.isNotBlank() }
+            when (authRepository.login(s.username.trim(), s.password, code)) {
+                LoginResult.Success ->
+                    _state.update { it.copy(submitting = false, signedIn = true) }
+
+                LoginResult.TotpRequired ->
+                    // Reveal the code field; a wrong code re-lands here as BAD_CODE.
+                    _state.update {
+                        it.copy(
+                            submitting = false,
+                            totpRequired = true,
+                            error = if (it.code.isNotBlank()) 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/components/HtmlText.kt

@@ -0,0 +1,40 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.ui.components
+
+import android.text.method.LinkMovementMethod
+import android.widget.TextView
+import androidx.compose.material3.LocalContentColor
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.graphics.toArgb
+import androidx.compose.ui.viewinterop.AndroidView
+import androidx.core.text.HtmlCompat
+
+/**
+ * Renders server-authored HTML (post/wiki bodies, `rich_text` blocks) via a
+ * native [TextView] + [HtmlCompat]. Compose has no HTML renderer; for the
+ * functional pass this is the pragmatic path and handles links, lists, and
+ * basic markup. The body is already sanitized server-side (website `cleanBody`).
+ * The M5 design pass can revisit richer/native rendering.
+ */
+@Composable
+fun HtmlText(html: String, modifier: Modifier = Modifier) {
+    val textColor = LocalContentColor.current.toArgb()
+    val linkColor = MaterialTheme.colorScheme.primary.toArgb()
+    AndroidView(
+        modifier = modifier,
+        factory = { context ->
+            TextView(context).apply {
+                movementMethod = LinkMovementMethod.getInstance()
+            }
+        },
+        update = { view ->
+            view.setTextColor(textColor)
+            view.setLinkTextColor(linkColor)
+            view.text = HtmlCompat.fromHtml(html, HtmlCompat.FROM_HTML_MODE_COMPACT)
+        },
+    )
+}

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

@@ -0,0 +1,87 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.ui.components
+
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.width
+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.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.text.style.TextAlign
+import androidx.compose.ui.unit.dp
+import com.runicgateway.app.R
+import com.runicgateway.app.ui.ErrorKind
+
+/** Centered progress indicator for a whole-screen loading state (§7). */
+@Composable
+fun LoadingView(modifier: Modifier = Modifier) {
+    Column(
+        modifier = modifier.fillMaxSize().padding(24.dp),
+        horizontalAlignment = Alignment.CenterHorizontally,
+        verticalArrangement = Arrangement.Center,
+    ) {
+        CircularProgressIndicator()
+    }
+}
+
+/**
+ * Whole-screen error state with a friendly, kind-specific message and a Retry
+ * button (§7). Copy is resolved from string resources so it stays localizable.
+ */
+@Composable
+fun ErrorView(
+    kind: ErrorKind,
+    onRetry: () -> Unit,
+    modifier: Modifier = Modifier,
+) {
+    Column(
+        modifier = modifier.fillMaxSize().padding(24.dp),
+        horizontalAlignment = Alignment.CenterHorizontally,
+        verticalArrangement = Arrangement.Center,
+    ) {
+        Text(
+            text = stringResource(errorMessageRes(kind)),
+            style = MaterialTheme.typography.bodyLarge,
+            textAlign = TextAlign.Center,
+        )
+        Button(
+            onClick = onRetry,
+            modifier = Modifier.padding(top = 16.dp).width(160.dp),
+        ) {
+            Text(stringResource(R.string.action_retry))
+        }
+    }
+}
+
+/** Centered informational message for an empty list (§7). */
+@Composable
+fun EmptyView(message: String, modifier: Modifier = Modifier) {
+    Column(
+        modifier = modifier.fillMaxSize().padding(24.dp),
+        horizontalAlignment = Alignment.CenterHorizontally,
+        verticalArrangement = Arrangement.Center,
+    ) {
+        Text(
+            text = message,
+            style = MaterialTheme.typography.bodyLarge,
+            textAlign = TextAlign.Center,
+        )
+    }
+}
+
+private fun errorMessageRes(kind: ErrorKind): Int = when (kind) {
+    ErrorKind.NETWORK -> R.string.error_network
+    ErrorKind.NOT_FOUND -> R.string.error_not_found
+    ErrorKind.RATE_LIMITED -> R.string.error_rate_limited
+    ErrorKind.SHARD_OFFLINE -> R.string.error_shard_offline
+    ErrorKind.SERVER -> R.string.error_server
+}

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

@@ -0,0 +1,113 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.ui.connect
+
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Column
+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.text.KeyboardActions
+import androidx.compose.foundation.text.KeyboardOptions
+import androidx.compose.material3.Button
+import androidx.compose.material3.CircularProgressIndicator
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.OutlinedTextField
+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.text.input.ImeAction
+import androidx.compose.ui.text.input.KeyboardType
+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.ui.connect.ConnectViewModel.ConnectError
+
+/**
+ * First-run "Connect to your shard's website" screen (PLAN.md §3). Nothing else
+ * in the app runs until a valid Runic Gateway site is entered and validated.
+ */
+@Composable
+fun ConnectScreen(
+    onConnected: () -> Unit,
+    modifier: Modifier = Modifier,
+    viewModel: ConnectViewModel = hiltViewModel(),
+) {
+    val state by viewModel.state.collectAsStateWithLifecycle()
+
+    Column(
+        modifier = modifier
+            .fillMaxSize()
+            .padding(24.dp),
+        horizontalAlignment = Alignment.CenterHorizontally,
+        verticalArrangement = Arrangement.Center,
+    ) {
+        Text(
+            text = stringResource(R.string.connect_title),
+            style = MaterialTheme.typography.headlineSmall,
+            textAlign = TextAlign.Center,
+        )
+        Text(
+            text = stringResource(R.string.connect_subtitle),
+            style = MaterialTheme.typography.bodyMedium,
+            textAlign = TextAlign.Center,
+            modifier = Modifier.padding(top = 8.dp, bottom = 24.dp),
+        )
+
+        OutlinedTextField(
+            value = state.input,
+            onValueChange = viewModel::onInputChange,
+            singleLine = true,
+            enabled = !state.submitting,
+            isError = state.error != null,
+            label = { Text(stringResource(R.string.connect_url_label)) },
+            placeholder = { Text(stringResource(R.string.connect_url_hint)) },
+            keyboardOptions = KeyboardOptions(
+                keyboardType = KeyboardType.Uri,
+                imeAction = ImeAction.Go,
+            ),
+            keyboardActions = KeyboardActions(onGo = { viewModel.connect(onConnected) }),
+            supportingText = state.error?.let { err ->
+                { Text(errorMessage(err), color = MaterialTheme.colorScheme.error) }
+            },
+            modifier = Modifier.fillMaxWidth(),
+        )
+
+        Button(
+            onClick = { viewModel.connect(onConnected) },
+            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.connect_button))
+            }
+        }
+    }
+}
+
+@Composable
+private fun errorMessage(error: ConnectError): String = when (error) {
+    ConnectError.Blank -> stringResource(R.string.connect_error_blank)
+    ConnectError.Malformed -> stringResource(R.string.connect_error_malformed)
+    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

@@ -0,0 +1,82 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.ui.connect
+
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.viewModelScope
+import com.runicgateway.app.core.net.ServerUrl
+import com.runicgateway.app.data.repository.ConnectionRepository
+import com.runicgateway.app.data.repository.ConnectionRepository.ProbeResult
+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 first-run connect screen (PLAN.md §3): validates + probes the
+ * entered base URL, and on success activates it for the whole app. The error is
+ * exposed as a resource-free [ConnectError] the screen maps to localized copy.
+ */
+@HiltViewModel
+class ConnectViewModel @Inject constructor(
+    private val connectionRepository: ConnectionRepository,
+) : ViewModel() {
+
+    sealed interface ConnectError {
+        data object Blank : ConnectError
+        data object Malformed : ConnectError
+        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
+    }
+
+    data class UiState(
+        val input: String = "",
+        val submitting: Boolean = false,
+        val error: ConnectError? = null,
+    )
+
+    private val _state = MutableStateFlow(UiState())
+    val state: StateFlow<UiState> = _state.asStateFlow()
+
+    fun onInputChange(value: String) {
+        _state.update { it.copy(input = value, error = null) }
+    }
+
+    fun connect(onSuccess: () -> Unit) {
+        if (_state.value.submitting) return
+        _state.update { it.copy(submitting = true, error = null) }
+        viewModelScope.launch {
+            val result = connectionRepository.probeAndConnect(_state.value.input)
+            when (result) {
+                is ProbeResult.Success -> {
+                    _state.update { it.copy(submitting = false) }
+                    onSuccess()
+                }
+                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))
+            }
+        }
+    }
+
+    private fun fail(error: ConnectError) {
+        _state.update { it.copy(submitting = false, error = error) }
+    }
+
+    private fun ServerUrl.Reason.toError(): ConnectError = when (this) {
+        ServerUrl.Reason.BLANK -> ConnectError.Blank
+        ServerUrl.Reason.MALFORMED -> ConnectError.Malformed
+        ServerUrl.Reason.UNSUPPORTED_SCHEME -> ConnectError.UnsupportedScheme
+        ServerUrl.Reason.INSECURE -> ConnectError.Insecure
+    }
+}

app/src/main/java/com/runicgateway/app/ui/contact/ContactScreen.kt

@@ -0,0 +1,121 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.ui.contact
+
+import androidx.compose.foundation.layout.Column
+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.KeyboardOptions
+import androidx.compose.foundation.verticalScroll
+import androidx.compose.material3.Button
+import androidx.compose.material3.CircularProgressIndicator
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.OutlinedTextField
+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.input.KeyboardType
+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.ErrorKind
+import com.runicgateway.app.ui.contact.ContactViewModel.Result
+
+/** Contact form (PLAN.md §6.1). Handles validation, send, mailto-fallback, errors. */
+@Composable
+fun ContactScreen(
+    modifier: Modifier = Modifier,
+    viewModel: ContactViewModel = hiltViewModel(),
+) {
+    val state by viewModel.state.collectAsStateWithLifecycle()
+
+    Column(
+        modifier = modifier
+            .fillMaxSize()
+            .verticalScroll(rememberScrollState())
+            .padding(20.dp),
+    ) {
+        Text(stringResource(R.string.contact_title), style = MaterialTheme.typography.headlineSmall)
+        Spacer(Modifier.height(16.dp))
+
+        OutlinedTextField(
+            value = state.name,
+            onValueChange = viewModel::onNameChange,
+            singleLine = true,
+            enabled = !state.submitting,
+            label = { Text(stringResource(R.string.contact_name)) },
+            modifier = Modifier.fillMaxWidth(),
+        )
+        Spacer(Modifier.height(12.dp))
+        OutlinedTextField(
+            value = state.email,
+            onValueChange = viewModel::onEmailChange,
+            singleLine = true,
+            enabled = !state.submitting,
+            keyboardOptions = KeyboardOptions(keyboardType = KeyboardType.Email),
+            label = { Text(stringResource(R.string.contact_email)) },
+            modifier = Modifier.fillMaxWidth(),
+        )
+        Spacer(Modifier.height(12.dp))
+        OutlinedTextField(
+            value = state.message,
+            onValueChange = viewModel::onMessageChange,
+            enabled = !state.submitting,
+            minLines = 4,
+            label = { Text(stringResource(R.string.contact_message)) },
+            modifier = Modifier.fillMaxWidth(),
+        )
+
+        state.result?.let { ResultMessage(it) }
+
+        Button(
+            onClick = viewModel::send,
+            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.contact_send))
+            }
+        }
+    }
+}
+
+@Composable
+private fun ResultMessage(result: Result) {
+    val (text, isError) = when (result) {
+        Result.Sent -> stringResource(R.string.contact_sent) to false
+        is Result.Fallback -> stringResource(R.string.contact_fallback, result.email ?: "") to false
+        Result.ValidationError -> stringResource(R.string.contact_validation) to true
+        is Result.Failed -> errorText(result.kind) to true
+    }
+    Text(
+        text = text,
+        style = MaterialTheme.typography.bodyMedium,
+        color = if (isError) MaterialTheme.colorScheme.error else MaterialTheme.colorScheme.primary,
+        modifier = Modifier.padding(top = 12.dp),
+    )
+}
+
+@Composable
+private fun errorText(kind: ErrorKind): String = when (kind) {
+    ErrorKind.NETWORK -> stringResource(R.string.error_network)
+    ErrorKind.RATE_LIMITED -> stringResource(R.string.error_rate_limited)
+    else -> stringResource(R.string.contact_error)
+}

app/src/main/java/com/runicgateway/app/ui/contact/ContactViewModel.kt

@@ -0,0 +1,79 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.ui.contact
+
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.viewModelScope
+import com.runicgateway.app.core.result.ApiResult
+import com.runicgateway.app.data.repository.ContactRepository
+import com.runicgateway.app.ui.ErrorKind
+import com.runicgateway.app.ui.toUiState
+import com.runicgateway.app.ui.UiState as LoadUiState
+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
+
+/** Contact form submission with client-side validation (PLAN.md §6.1). */
+@HiltViewModel
+class ContactViewModel @Inject constructor(
+    private val contactRepository: ContactRepository,
+) : ViewModel() {
+
+    sealed interface Result {
+        data object Sent : Result
+
+        /** Site has no mailer; email directly at [email] instead. */
+        data class Fallback(val email: String?) : Result
+        data object ValidationError : Result
+        data class Failed(val kind: ErrorKind) : Result
+    }
+
+    data class UiState(
+        val name: String = "",
+        val email: String = "",
+        val message: String = "",
+        val submitting: Boolean = false,
+        val result: Result? = null,
+    )
+
+    private val _state = MutableStateFlow(UiState())
+    val state: StateFlow<UiState> = _state.asStateFlow()
+
+    fun onNameChange(value: String) = _state.update { it.copy(name = value, result = null) }
+    fun onEmailChange(value: String) = _state.update { it.copy(email = value, result = null) }
+    fun onMessageChange(value: String) = _state.update { it.copy(message = value, result = null) }
+
+    fun send() {
+        val s = _state.value
+        if (s.submitting) return
+        if (s.name.isBlank() || s.email.isBlank() || s.message.isBlank()) {
+            _state.update { it.copy(result = Result.ValidationError) }
+            return
+        }
+        _state.update { it.copy(submitting = true, result = null) }
+        viewModelScope.launch {
+            val result = when (val r = contactRepository.send(s.name.trim(), s.email.trim(), s.message.trim())) {
+                is ApiResult.Ok ->
+                    if (r.data.sent) Result.Sent else Result.Fallback(r.data.email)
+                else -> {
+                    val kind = (r.toUiState() as? LoadUiState.Error)?.kind ?: ErrorKind.SERVER
+                    Result.Failed(kind)
+                }
+            }
+            _state.update {
+                // Clear the fields on a successful send; keep them on failure so the
+                // user can retry without retyping.
+                if (result is Result.Sent) {
+                    UiState(result = result)
+                } else {
+                    it.copy(submitting = false, result = result)
+                }
+            }
+        }
+    }
+}

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

@@ -0,0 +1,122 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+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.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.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.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
+ * live site-status card (online vs maintenance) with the backend version.
+ */
+@Composable
+fun HomeScreen(
+    brand: BrandDto?,
+    modifier: Modifier = Modifier,
+    viewModel: HomeViewModel = 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 -> HomeContent(brand, s.data, modifier)
+    }
+}
+
+@Composable
+private fun HomeContent(brand: BrandDto?, status: StatusDto, modifier: Modifier = Modifier) {
+    Column(
+        modifier = modifier
+            .fillMaxSize()
+            .verticalScroll(rememberScrollState())
+            .padding(20.dp),
+    ) {
+        Text(
+            text = brand?.name?.takeIf { it.isNotBlank() } ?: stringResource(R.string.app_name),
+            style = MaterialTheme.typography.headlineMedium,
+        )
+        brand?.tagline?.takeIf { it.isNotBlank() }?.let { tagline ->
+            Text(
+                text = tagline,
+                style = MaterialTheme.typography.titleSmall,
+                color = MaterialTheme.colorScheme.onSurfaceVariant,
+                modifier = Modifier.padding(top = 4.dp),
+            )
+        }
+
+        Spacer(Modifier.height(20.dp))
+
+        StatusCard(status)
+
+        brand?.description?.takeIf { it.isNotBlank() }?.let { desc ->
+            Spacer(Modifier.height(16.dp))
+            Text(text = desc, style = MaterialTheme.typography.bodyMedium)
+        }
+    }
+}
+
+@Composable
+private fun StatusCard(status: StatusDto) {
+    val online = !status.isMaintenance
+
+    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.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),
+            )
+        }
+    }
+}

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

@@ -0,0 +1,36 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.ui.home
+
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.viewModelScope
+import com.runicgateway.app.data.api.dto.StatusDto
+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.launch
+import javax.inject.Inject
+
+/** Loads site status (mode + version) for the Home screen (PLAN.md §6.1). */
+@HiltViewModel
+class HomeViewModel @Inject constructor(
+    private val settingsRepository: SettingsRepository,
+) : ViewModel() {
+
+    private val _state = MutableStateFlow<UiState<StatusDto>>(UiState.Loading)
+    val state: StateFlow<UiState<StatusDto>> = _state.asStateFlow()
+
+    init { load() }
+
+    fun load() {
+        _state.value = UiState.Loading
+        viewModelScope.launch {
+            _state.value = settingsRepository.getStatus().toUiState()
+        }
+    }
+}

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

@@ -0,0 +1,64 @@
+/*
+ * 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,
+
+    /** Visible only to a player — the linked game-data groups (§6.3). */
+    PLAYER,
+}
+
+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),
+)
+
+/**
+ * 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
+        }
+    }

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

@@ -0,0 +1,82 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.ui.navigation
+
+/**
+ * Navigation destinations for the M1 public surface (PLAN.md §5). Routes are
+ * plain strings for Navigation-Compose; argument-bearing routes expose a
+ * `build(...)` helper so call sites never hand-format paths.
+ */
+object Routes {
+    const val HOME = "home"
+    const val NEWS = "news"
+    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"
+
+    /** 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}"
+
+    /** CMS page by slug (e.g. the conventional "about" page, mirrored from the site nav). */
+    const val PAGE = "page/{slug}"
+
+    /** News post detail by category + id-or-slug. */
+    const val POST = "news/{category}/{idOrSlug}"
+
+    /** Wiki page detail by slug. */
+    const val WIKI_PAGE = "wiki/{slug}"
+
+    object Args {
+        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/news/NewsScreen.kt

@@ -0,0 +1,117 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.ui.news
+
+import androidx.compose.foundation.clickable
+import androidx.compose.foundation.layout.Column
+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.ScrollableTabRow
+import androidx.compose.material3.Tab
+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.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.PostDto
+import com.runicgateway.app.data.repository.ContentRepository.PostCategory
+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
+
+/** News hub with category tabs and a post list (PLAN.md §6.1). */
+@Composable
+fun NewsScreen(
+    onOpenPost: (categoryUrlSlug: String, idOrSlug: String) -> Unit,
+    modifier: Modifier = Modifier,
+    viewModel: NewsViewModel = hiltViewModel(),
+) {
+    val category by viewModel.category.collectAsStateWithLifecycle()
+    val state by viewModel.state.collectAsStateWithLifecycle()
+
+    Column(modifier = modifier.fillMaxSize()) {
+        ScrollableTabRow(selectedTabIndex = PostCategory.entries.indexOf(category)) {
+            PostCategory.entries.forEach { cat ->
+                Tab(
+                    selected = cat == category,
+                    onClick = { viewModel.selectCategory(cat) },
+                    text = { Text(stringResource(categoryLabel(cat))) },
+                )
+            }
+        }
+
+        when (val s = state) {
+            is UiState.Loading -> LoadingView()
+            is UiState.Error -> ErrorView(s.kind, onRetry = viewModel::load)
+            is UiState.Success -> {
+                if (s.data.isEmpty()) {
+                    EmptyView(stringResource(R.string.news_empty))
+                } else {
+                    PostList(s.data, category.urlSlug, onOpenPost)
+                }
+            }
+        }
+    }
+}
+
+@Composable
+private fun PostList(
+    posts: List<PostDto>,
+    categoryUrlSlug: String,
+    onOpenPost: (String, String) -> Unit,
+) {
+    LazyColumn(
+        modifier = Modifier.fillMaxSize().padding(horizontal = 16.dp),
+    ) {
+        items(posts, key = { it.id }) { post ->
+            PostRow(post) { onOpenPost(categoryUrlSlug, post.slug ?: post.id.toString()) }
+        }
+    }
+}
+
+@Composable
+private fun PostRow(post: PostDto, onClick: () -> Unit) {
+    Card(
+        modifier = Modifier
+            .fillMaxWidth()
+            .padding(vertical = 6.dp)
+            .clickable(onClick = onClick),
+    ) {
+        Column(Modifier.padding(16.dp)) {
+            Text(post.title, style = MaterialTheme.typography.titleMedium)
+            post.publishedAt?.let { date ->
+                Text(
+                    text = date,
+                    style = MaterialTheme.typography.labelSmall,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                    modifier = Modifier.padding(top = 2.dp),
+                )
+            }
+            post.excerpt?.takeIf { it.isNotBlank() }?.let { excerpt ->
+                Text(
+                    text = excerpt,
+                    style = MaterialTheme.typography.bodyMedium,
+                    modifier = Modifier.padding(top = 8.dp),
+                )
+            }
+        }
+    }
+}
+
+private fun categoryLabel(category: PostCategory): Int = when (category) {
+    PostCategory.NEWS -> R.string.news_cat_news
+    PostCategory.FIVE_ON_FRIDAY -> R.string.news_cat_five_on_friday
+    PostCategory.NEWSLETTER -> R.string.news_cat_newsletter
+    PostCategory.SCREENSHOTS -> R.string.news_cat_screenshots
+}

app/src/main/java/com/runicgateway/app/ui/news/NewsViewModel.kt

@@ -0,0 +1,46 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.ui.news
+
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.viewModelScope
+import com.runicgateway.app.data.api.dto.PostDto
+import com.runicgateway.app.data.repository.ContentRepository
+import com.runicgateway.app.data.repository.ContentRepository.PostCategory
+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
+
+/** News hub: a category selector over the four post feeds (PLAN.md §6.1). */
+@HiltViewModel
+class NewsViewModel @Inject constructor(
+    private val contentRepository: ContentRepository,
+) : ViewModel() {
+
+    private val _category = MutableStateFlow(PostCategory.NEWS)
+    val category: StateFlow<PostCategory> = _category.asStateFlow()
+
+    private val _state = MutableStateFlow<UiState<List<PostDto>>>(UiState.Loading)
+    val state: StateFlow<UiState<List<PostDto>>> = _state.asStateFlow()
+
+    init { load() }
+
+    fun selectCategory(category: PostCategory) {
+        if (category == _category.value) return
+        _category.value = category
+        load()
+    }
+
+    fun load() {
+        _state.value = UiState.Loading
+        viewModelScope.launch {
+            _state.value = contentRepository.getPosts(_category.value).toUiState()
+        }
+    }
+}

app/src/main/java/com/runicgateway/app/ui/news/PostScreen.kt

@@ -0,0 +1,80 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.ui.news
+
+import androidx.compose.foundation.layout.Column
+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.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.layout.ContentScale
+import androidx.compose.ui.unit.dp
+import androidx.hilt.navigation.compose.hiltViewModel
+import androidx.lifecycle.compose.collectAsStateWithLifecycle
+import coil.compose.AsyncImage
+import com.runicgateway.app.data.api.dto.PostDto
+import com.runicgateway.app.ui.LocalAssetResolver
+import com.runicgateway.app.ui.UiState
+import com.runicgateway.app.ui.components.ErrorView
+import com.runicgateway.app.ui.components.HtmlText
+import com.runicgateway.app.ui.components.LoadingView
+
+/** Post detail: title, date, hero image, and HTML body (PLAN.md §6.1). */
+@Composable
+fun PostScreen(
+    modifier: Modifier = Modifier,
+    viewModel: PostViewModel = 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 -> PostContent(s.data, modifier)
+    }
+}
+
+@Composable
+private fun PostContent(post: PostDto, modifier: Modifier = Modifier) {
+    val resolveAsset = LocalAssetResolver.current
+    Column(
+        modifier = modifier
+            .fillMaxSize()
+            .verticalScroll(rememberScrollState())
+            .padding(20.dp),
+    ) {
+        Text(post.title, style = MaterialTheme.typography.headlineSmall)
+        post.publishedAt?.let { date ->
+            Text(
+                text = date,
+                style = MaterialTheme.typography.labelMedium,
+                color = MaterialTheme.colorScheme.onSurfaceVariant,
+                modifier = Modifier.padding(top = 4.dp),
+            )
+        }
+
+        resolveAsset(post.imageUrl)?.let { url ->
+            Spacer(Modifier.height(16.dp))
+            AsyncImage(
+                model = url,
+                contentDescription = null,
+                contentScale = ContentScale.FillWidth,
+                modifier = Modifier.fillMaxWidth(),
+            )
+        }
+
+        post.body?.takeIf { it.isNotBlank() }?.let { body ->
+            Spacer(Modifier.height(16.dp))
+            HtmlText(body, modifier = Modifier.fillMaxWidth())
+        }
+    }
+}