Merge pull request 'feat(rust): the Rust server list and one server's page — M14 (module-rust phase 5, Android leg A)' (#47) from feature/rust-p5-android-a into edge

Reviewed-on: #47

.gitea/workflows/pr-checks.yml

@@ -1,5 +1,5 @@
-# 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,
+# Gate every pull request into `main` or `edge` 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.
 #
@@ -18,9 +18,14 @@
 
 name: PR Checks
 
+# `edge` is here because a workstream that lands ten phase PRs onto it before one
+# cutover PR into `main` otherwise gets NO CI at all until the cutover — which is
+# exactly what happened to all nine M12 phase PRs, and would have happened again
+# to engagement Phase 8 (ENGAGEMENT.md §7.1 Q8). A phase should fail on its own
+# PR, not inside the cutover window with a whole workstream's diff to bisect.
 on:
   pull_request:
-    branches: [main]
+    branches: [main, edge]
 
 concurrency:
   group: pr-checks-${{ github.ref }}
@@ -40,8 +45,15 @@ jobs:
 
       - uses: actions/checkout@v4
 
+      # `packages: ''` is load-bearing, not tidying. The action's own default is
+      # `tools` -- a package Google has REMOVED from the SDK repository -- so the
+      # default makes `sdkmanager tools` exit 1 and the step fails before a line
+      # of this repo is compiled. It is redundant here regardless: the next step
+      # installs exactly what the build targets.
       - name: Set up Android SDK
         uses: android-actions/setup-android@v3
+        with:
+          packages: ''
 
       # Install exactly what the build targets so it never depends on AGP's
       # build-time auto-download. `yes |` accepts any license prompts; `set

README.md

@@ -48,10 +48,15 @@ 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.
+`.gitea/workflows/pr-checks.yml` gates PRs into `main` **and `edge`** 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.
+
+**`edge` is in the trigger deliberately**: a workstream that lands its phases on a working branch
+before one cutover PR into `main` otherwise gets no CI at all until the cutover — which is what
+happened to all nine M12 phase PRs (`docs/website/ENGAGEMENT.md` §7.1 Q8). `sonarqube.yml` is
+unaffected: it is a push-on-`main` analysis, not a PR gate.
 
 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:

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

@@ -58,9 +58,16 @@ class MainActivity : ComponentActivity() {
     // consumed once by RunicApp which navigates to the stream's screen.
     private var pendingStream by mutableStateOf<String?>(null)
 
+    // The tickle's other half: an opaque ref, carried since M7 and read since
+    // ENGAGEMENT.md phase 8, where a `notification:<id>` ref means the engine wrote
+    // an inbox row and the tap should land there. Never rendered — it is a hint that
+    // something exists, and the app pulls the real item over the authenticated API.
+    private var pendingRef by mutableStateOf<String?>(null)
+
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         pendingStream = intent?.getStringExtra(PushNotifier.EXTRA_STREAM)
+        pendingRef = intent?.getStringExtra(PushNotifier.EXTRA_REF)
         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.
@@ -99,7 +106,11 @@ class MainActivity : ComponentActivity() {
                                     appearance = s.appearance,
                                     onChangeServer = appViewModel::changeServer,
                                     deepLinkStream = pendingStream,
-                                    onDeepLinkConsumed = { pendingStream = null },
+                                    deepLinkRef = pendingRef,
+                                    onDeepLinkConsumed = {
+                                        pendingStream = null
+                                        pendingRef = null
+                                    },
                                 )
                         }
                     }
@@ -116,7 +127,13 @@ class MainActivity : ComponentActivity() {
     override fun onNewIntent(intent: Intent) {
         super.onNewIntent(intent)
         setIntent(intent)
-        intent.getStringExtra(PushNotifier.EXTRA_STREAM)?.let { pendingStream = it }
+        intent.getStringExtra(PushNotifier.EXTRA_STREAM)?.let {
+            pendingStream = it
+            // Cleared alongside, not conditionally: a tickle with no ref arriving
+            // after one with a ref must not inherit the earlier ref and land on the
+            // inbox instead of its own screen.
+            pendingRef = intent.getStringExtra(PushNotifier.EXTRA_REF)
+        }
         handleSsoCallback(intent)
     }
 

app/src/main/java/com/runicgateway/app/core/inbox/DataStoreInboxCache.kt

@@ -0,0 +1,74 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.core.inbox
+
+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 com.runicgateway.app.data.api.dto.NotificationItemDto
+import dagger.hilt.android.qualifiers.ApplicationContext
+import kotlinx.coroutines.flow.first
+import kotlinx.serialization.Serializable
+import kotlinx.serialization.json.Json
+import javax.inject.Inject
+import javax.inject.Singleton
+
+private val Context.inboxDataStore: DataStore<Preferences> by preferencesDataStore(name = "inbox")
+
+/**
+ * [InboxCache] over the same plain DataStore the push state uses. Not secret —
+ * tokens stay in the encrypted store — but an inbox body is a person's own
+ * notifications, which is why the snapshot is owner-scoped and cleared on
+ * sign-out rather than left lying about.
+ */
+@Singleton
+class DataStoreInboxCache @Inject constructor(
+    @param:ApplicationContext private val context: Context,
+    private val json: Json,
+) : InboxCache {
+
+    private val store = context.inboxDataStore
+
+    override suspend fun read(owner: String): InboxCache.Snapshot? {
+        val raw = store.data.first()[KEY_SNAPSHOT] ?: return null
+        val stored = try {
+            json.decodeFromString(Stored.serializer(), raw)
+        } catch (_: Exception) {
+            // A snapshot this build can't parse is a snapshot from an older one;
+            // dropping it silently is right — it will be rewritten on the next pull.
+            return null
+        }
+        if (stored.owner != owner) return null
+        return InboxCache.Snapshot(items = stored.items, unread = stored.unread, savedAt = stored.savedAt)
+    }
+
+    override suspend fun write(owner: String, items: List<NotificationItemDto>, unread: Int) {
+        val payload = Stored(
+            owner = owner,
+            items = items.take(InboxCache.MAX_ITEMS),
+            unread = unread,
+            savedAt = System.currentTimeMillis(),
+        )
+        store.edit { it[KEY_SNAPSHOT] = json.encodeToString(Stored.serializer(), payload) }
+    }
+
+    override suspend fun clear() {
+        store.edit { it.remove(KEY_SNAPSHOT) }
+    }
+
+    @Serializable
+    private data class Stored(
+        val owner: String,
+        val items: List<NotificationItemDto>,
+        val unread: Int,
+        val savedAt: Long,
+    )
+
+    private companion object {
+        val KEY_SNAPSHOT = stringPreferencesKey("snapshot")
+    }
+}

app/src/main/java/com/runicgateway/app/core/inbox/InboxCache.kt

@@ -0,0 +1,65 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.core.inbox
+
+import com.runicgateway.app.data.api.dto.NotificationItemDto
+
+/**
+ * The inbox's offline snapshot (ENGAGEMENT.md phase 8).
+ *
+ * **PLAN.md §7 decided the app ships no Room cache, and that decision stands** —
+ * this is its one named exception, settled with the org lead 2026-08-31. The
+ * inbox is a short, read-only, newest-first list with a server-side cursor and no
+ * joins, so what "works offline" needs is the newest page and the badge, not a
+ * database: one JSON blob in the DataStore the push code already uses. Nothing
+ * here is a source of truth — a successful pull always replaces it, and the
+ * screen says out loud when it is showing this instead.
+ *
+ * **The [owner] key is the security property, not a convenience.** A snapshot is
+ * written under the base URL *and* the account id that produced it and is only
+ * ever handed back to that exact pair, so a cache cannot survive into another
+ * account or another shard — including the sign-out paths that never reach
+ * [clear] at all (a dead refresh token, a server switch). Clearing on logout is
+ * the tidy-up; this is what makes it safe.
+ *
+ * An interface for the same reason [com.runicgateway.app.core.auth.TokenStore] is
+ * one: the storage needs a `Context` and the view models that use it should be
+ * testable without one.
+ */
+interface InboxCache {
+
+    /**
+     * What was cached for [owner], or null when nothing was — including when the
+     * stored snapshot belongs to a different account or shard, which is the same
+     * answer on purpose.
+     */
+    suspend fun read(owner: String): Snapshot?
+
+    /**
+     * Replace the snapshot with the newest page.
+     *
+     * Only the FIRST page is ever cached, capped at [MAX_ITEMS]: an offline inbox
+     * is there so the last things you were told are still readable on a train, not
+     * so the whole history is. Later pages come from the server or not at all.
+     */
+    suspend fun write(owner: String, items: List<NotificationItemDto>, unread: Int)
+
+    /** Forget everything. Called on sign-out, alongside the push deregistration. */
+    suspend fun clear()
+
+    /** What the screen renders from while offline, with the time it was captured. */
+    data class Snapshot(
+        val items: List<NotificationItemDto>,
+        val unread: Int,
+        val savedAt: Long,
+    )
+
+    companion object {
+        /** The server's own default page size — caching more than it sends is pointless. */
+        const val MAX_ITEMS = 30
+
+        /** The (shard, account) a snapshot belongs to. */
+        fun ownerKey(baseUrl: String?, userId: Long): String = "${baseUrl.orEmpty()}|$userId"
+    }
+}

app/src/main/java/com/runicgateway/app/core/time/Instants.kt

@@ -0,0 +1,41 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.core.time
+
+import java.time.Instant
+import java.time.LocalDateTime
+import java.time.ZoneId
+
+/**
+ * Parse a timestamp off the wire, in either shape the backend sends.
+ *
+ * **Which one arrives is not the app's to decide.** Express serializes a `Date`
+ * to ISO-8601 with a `Z`, but these values start life as MariaDB `DATETIME`
+ * columns, and one read back as a string reaches the wire as
+ * `2026-08-31 07:13:50` with no zone at all. A zoneless stamp is read as **UTC**,
+ * because that is what the server stores — reading it as local time would
+ * silently shift every timestamp by the device's offset, which is a bug that
+ * looks right on the machine it was written on.
+ *
+ * Anything unparseable answers null, and every caller is expected to render
+ * *something* without it: a notification with an odd date is still worth reading,
+ * and an event with one is still worth listing.
+ *
+ * Lives here rather than beside either caller because the trap is the wire's, not
+ * one screen's — the inbox found it (ENGAGEMENT.md phase 8) and the event screens
+ * inherit it (EVENTS.md §I).
+ */
+fun parseWireInstant(raw: String?): Instant? {
+    val text = raw?.trim().orEmpty()
+    if (text.isEmpty()) return null
+    return try {
+        Instant.parse(text)
+    } catch (_: Exception) {
+        try {
+            LocalDateTime.parse(text.replace(' ', 'T')).atZone(ZoneId.of("UTC")).toInstant()
+        } catch (_: Exception) {
+            null
+        }
+    }
+}

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

@@ -0,0 +1,84 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.data.api
+
+import com.runicgateway.app.data.api.dto.EventCalendarDto
+import com.runicgateway.app.data.api.dto.EventHistoryDto
+import com.runicgateway.app.data.api.dto.EventSeriesResponse
+import com.runicgateway.app.data.api.dto.PublicEventResponse
+import retrofit2.http.GET
+import retrofit2.http.Path
+import retrofit2.http.Query
+
+/**
+ * The event surface (PLAN.md §9 M13, `docs/website/EVENTS.md` § API surface).
+ *
+ * **These are CORE routes, not a module's**, which is why they live here rather
+ * than beside the shard reads in [PublicApi]: they exist on a backend
+ * with no game module installed at all, and they are gated by core's own `events`
+ * capability rather than by a module's. Nothing here is under `/shard`.
+ *
+ * The three public reads and the one player read share an interface for the same
+ * reason the website mounts them in one feature: the history row's whole purpose
+ * is to link back to the public page. The player call carries a bearer through
+ * [com.runicgateway.app.core.net.AuthInterceptor] like every other authenticated
+ * call; there is one Retrofit.
+ */
+interface EventsApi {
+
+    /**
+     * The public calendar. Defaults to now through 31 days out when neither end
+     * is named; the window may span at most 92 days and the server 400s past it.
+     *
+     * Rehearsals and unlisted events are absent — that filtering is in SQL, not
+     * in the answer, so there is nothing here to re-check.
+     */
+    @GET("api/v1/public/events")
+    suspend fun getCalendar(
+        @Query("from") from: String? = null,
+        @Query("to") to: String? = null,
+        @Query("seriesId") seriesId: Long? = null,
+    ): EventCalendarDto
+
+    /**
+     * One event.
+     *
+     * **[run] selects which occurrence the results table is about**, and is what
+     * an announcement's link carries: the page lives at the definition's slug, so
+     * a weekly event has one address that survives a retitle, while every
+     * `event.` trigger is about one occurrence. A run belonging to some other
+     * event is ignored rather than refused, so a stale link in a months-old mail
+     * still opens the page it was about.
+     *
+     * A draft, an archived definition and an unlisted one all answer 404,
+     * indistinguishable from a slug that never existed.
+     */
+    @GET("api/v1/public/events/{slug}")
+    suspend fun getEvent(
+        @Path("slug") slug: String,
+        @Query("run") run: String? = null,
+    ): PublicEventResponse
+
+    /**
+     * One arc. A series with no listed events answers 404 rather than an empty
+     * page — an arc is a label on its definitions, so a page for an empty one
+     * would publish that an operator has named something they have not announced.
+     */
+    @GET("api/v1/public/events/series/{slug}")
+    suspend fun getSeries(@Path("slug") slug: String): EventSeriesResponse
+
+    /**
+     * The caller's own participation history. Self-scoped on the session's user
+     * id server-side; there is deliberately no id parameter here, because there
+     * is none on the route.
+     *
+     * [before] is a participation row id, not an offset — the list gains rows at
+     * the top as the reader attends things.
+     */
+    @GET("api/v1/player/events/history")
+    suspend fun getHistory(
+        @Query("limit") limit: Int? = null,
+        @Query("before") before: Long? = null,
+    ): EventHistoryDto
+}

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

@@ -3,8 +3,13 @@
  */
 package com.runicgateway.app.data.api
 
+import com.runicgateway.app.data.api.dto.NotificationChannelPrefsDto
+import com.runicgateway.app.data.api.dto.NotificationChannelPrefsUpdateDto
+import com.runicgateway.app.data.api.dto.NotificationInboxDto
+import com.runicgateway.app.data.api.dto.NotificationReadResultDto
 import com.runicgateway.app.data.api.dto.NotificationStreamsDto
 import com.runicgateway.app.data.api.dto.NotificationSubscriptionsDto
+import com.runicgateway.app.data.api.dto.NotificationUnreadDto
 import com.runicgateway.app.data.api.dto.PushDeviceDto
 import com.runicgateway.app.data.api.dto.RegisterDeviceRequest
 import retrofit2.http.Body
@@ -13,10 +18,13 @@ import retrofit2.http.GET
 import retrofit2.http.POST
 import retrofit2.http.PUT
 import retrofit2.http.Path
+import retrofit2.http.Query
 
 /**
- * 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
+ * The notification surface under `/auth/me` (PLAN.md §11): device (endpoint)
+ * registration, per-user stream subscriptions, the per-channel preferences that
+ * supersede them (ENGAGEMENT.md phase 3), and the in-app **inbox** — the first
+ * of these that carries content rather than a preference (phase 7/8). 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.
@@ -40,4 +48,41 @@ interface NotificationsApi {
 
     @PUT("api/v1/auth/me/notifications/subscriptions")
     suspend fun putSubscriptions(@Body body: NotificationSubscriptionsDto): NotificationSubscriptionsDto
+
+    // ── Per-channel preferences (ENGAGEMENT.md phase 3) ────────────────────
+    //
+    // The superset of the two calls above: `notification_subscriptions` is now
+    // the push projection of this table and the server fans every write to
+    // either one into the other, so the two cannot disagree.
+
+    @GET("api/v1/auth/me/notifications/channels")
+    suspend fun channelPrefs(): NotificationChannelPrefsDto
+
+    /** SPARSE — send only the pairs that changed; everything unnamed is untouched. */
+    @PUT("api/v1/auth/me/notifications/channels")
+    suspend fun putChannelPrefs(
+        @Body body: NotificationChannelPrefsUpdateDto,
+    ): NotificationChannelPrefsDto
+
+    // ── The inbox (ENGAGEMENT.md phase 7/8) ────────────────────────────────
+    //
+    // Keyset-paged on `before`, never an offset. There is no way to name another
+    // user on any of these: the caller is the only account they can read or write.
+
+    @GET("api/v1/auth/me/notifications")
+    suspend fun inbox(
+        @Query("limit") limit: Int? = null,
+        @Query("before") before: Long? = null,
+        @Query("unread") unread: Boolean? = null,
+    ): NotificationInboxDto
+
+    @GET("api/v1/auth/me/notifications/unread-count")
+    suspend fun unreadCount(): NotificationUnreadDto
+
+    /** Idempotent; 404 both for a missing item and for another account's. */
+    @POST("api/v1/auth/me/notifications/{id}/read")
+    suspend fun markRead(@Path("id") id: Long): NotificationReadResultDto
+
+    @POST("api/v1/auth/me/notifications/read-all")
+    suspend fun markAllRead(): NotificationReadResultDto
 }

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

@@ -18,6 +18,7 @@ import com.runicgateway.app.data.api.dto.HouseDto
 import com.runicgateway.app.data.api.dto.MarketMetaDto
 import com.runicgateway.app.data.api.dto.MarketPageDto
 import com.runicgateway.app.data.api.dto.MarketVendorDto
+import com.runicgateway.app.data.api.dto.ModulesDto
 import com.runicgateway.app.data.api.dto.OnlineStaffDto
 import com.runicgateway.app.data.api.dto.PageDto
 import com.runicgateway.app.data.api.dto.PointsBoardDto
@@ -67,6 +68,18 @@ interface PublicApi {
     @GET("api/v1/public/settings")
     suspend fun getSettings(): SettingsDto
 
+    /**
+     * Which modules this backend is serving, and the capabilities each declares
+     * (§5, M13). Read together with the `version` block's own `capabilities` —
+     * core's list and a module's are separate lists on purpose.
+     *
+     * This is what lets the app tell a module that is **not installed** from a
+     * lookup that failed: `/public/shard/features` 404s in both cases, and only
+     * this call distinguishes them.
+     */
+    @GET("api/v1/public/modules")
+    suspend fun getModules(): ModulesDto
+
     // ── News & content ───────────────────────────────────────────────────
     @GET("api/v1/public/posts/{category}")
     suspend fun getPosts(@Path("category") category: String): List<PostDto>

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

@@ -0,0 +1,94 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.data.api
+
+import com.runicgateway.app.data.api.dto.RustEventListDto
+import com.runicgateway.app.data.api.dto.RustLeaderboardDto
+import com.runicgateway.app.data.api.dto.RustOnlineDto
+import com.runicgateway.app.data.api.dto.RustServerListDto
+import com.runicgateway.app.data.api.dto.RustServerResponse
+import com.runicgateway.app.data.api.dto.RustWipeListDto
+import retrofit2.http.GET
+import retrofit2.http.Path
+import retrofit2.http.Query
+
+/**
+ * `module-rust`'s public read path (PLAN.md §9 M14; `docs/modules/rust/PLAN.md`
+ * §17).
+ *
+ * **These paths are hardcoded, and that is the contract rather than a shortcut.**
+ * `MODULE_API.md` §2.9 forbids a client inferring a route from a capability, so
+ * the app cannot build `/<module id>/servers` from what `GET /public/modules`
+ * reports. A capability answers one question — *is the module there* — and these
+ * five addresses are knowledge the app has because someone read the module's
+ * router, exactly as the nine `/uo/` paths in [NavPaths] are.
+ *
+ * Its own interface, not a section of [PublicApi], for the reason [EventsApi] is
+ * its own: these exist only where the Rust module is installed, and a backend
+ * running a different game answers none of them.
+ */
+interface RustApi {
+
+    /**
+     * Every Rust server this site follows.
+     *
+     * Answers from the module's own tables and never from a live call to a game
+     * host, so it succeeds while every server in the fleet is off — a server
+     * nobody can reach comes back `online: false, stale: true` with everything it
+     * last said still attached. There is no failure case here for the game being
+     * down, only for the website being down.
+     */
+    @GET("api/v1/public/rust/servers")
+    suspend fun getServers(): RustServerListDto
+
+    /**
+     * One server, or a **404**.
+     *
+     * The only route under `/servers/{id}` that can say a server is not there:
+     * the four below answer an empty list for an id nobody configured, because an
+     * unknown server genuinely has no events and nobody online. A server an
+     * operator **disabled** answers the same 404 — switching one off is not
+     * switching it into a refusal.
+     */
+    @GET("api/v1/public/rust/servers/{id}")
+    suspend fun getServer(@Path("id") id: String): RustServerResponse
+
+    /**
+     * The feed, newest first.
+     *
+     * [kind] is comma-separated and [wipe] a wipe id; both are optional, and an
+     * **absent one must be absent rather than empty** — `?wipe=` asks for a wipe
+     * whose id is the empty string and answers nothing, with no error to notice.
+     * Retrofit drops a null `@Query` entirely, which is why these are nullable
+     * and never defaulted to `""`.
+     *
+     * The server serves a default-deny allowlist: moderation events, login
+     * attempts and anything carrying an IP address are stored and never returned
+     * here, whatever is asked for.
+     */
+    @GET("api/v1/public/rust/servers/{id}/events")
+    suspend fun getEvents(
+        @Path("id") id: String,
+        @Query("kind") kind: String? = null,
+        @Query("wipe") wipe: String? = null,
+        @Query("limit") limit: Int? = null,
+    ): RustEventListDto
+
+    /** Per wipe when [wipe] is given, all-time otherwise — the same rows summed. */
+    @GET("api/v1/public/rust/servers/{id}/leaderboard")
+    suspend fun getLeaderboard(
+        @Path("id") id: String,
+        @Query("wipe") wipe: String? = null,
+        @Query("sort") sort: String? = null,
+        @Query("limit") limit: Int? = null,
+    ): RustLeaderboardDto
+
+    /** Every wipe this server has had, newest first. */
+    @GET("api/v1/public/rust/servers/{id}/wipes")
+    suspend fun getWipes(@Path("id") id: String): RustWipeListDto
+
+    /** The presence board, which an unreachable server does not clear. */
+    @GET("api/v1/public/rust/servers/{id}/online")
+    suspend fun getOnline(@Path("id") id: String): RustOnlineDto
+}

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

@@ -0,0 +1,212 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.data.api.dto
+
+import kotlinx.serialization.Serializable
+
+/**
+ * Wire shapes for the public event surface (`docs/website/EVENTS.md` §I, events
+ * Phase 14a; the app's half is M13). Field names match
+ * `server/src/model/events/eventPublic.model.js` exactly.
+ *
+ * **That model is a PROJECTION, and these DTOs must not out-grow it.** Nothing on
+ * the server side is spread into a public entry — a field reaches one because a
+ * line put it there — so three things are absent from every shape below and each
+ * absence is a decision core made: the **spec** (phases, steps, actions and their
+ * params are the operator's plan for changing a live world; a visitor gets the
+ * phase LABEL while a run is live and nothing else), **health, cleanup, claims
+ * and errors** (facts about the deployment's plumbing, not about the event), and
+ * **`member_key`** (module-opaque, so core cannot say what publishing one would
+ * disclose). Adding a field here that the server does not send would decode to a
+ * default and render as a fact.
+ *
+ * Every DTO ignores unknown keys (NetworkModule's lenient Json), so an additive
+ * backend field is safe.
+ */
+
+/**
+ * One calendar entry. [kind] is `run` or `projected` and the two are drawn
+ * differently on purpose.
+ *
+ * A **run** is a materialised occurrence: a row exists, it can be cancelled, and
+ * what it says is committed to. A **projected** entry is arithmetic past the
+ * materialisation horizon — a forecast with nothing behind it — so the screen
+ * labels it rather than drawing it as a booking. [adjusted] and [shiftMinutes]
+ * only ever arrive on a projection, and say a DST shift moved it.
+ *
+ * [scheduledFor] is a UTC instant and [timezone] is the EVENT's own zone, never
+ * the reader's. See [com.runicgateway.app.ui.events.eventTime].
+ */
+@Serializable
+data class EventCalendarEntryDto(
+    val kind: String = "run",
+    val title: String = "",
+    val slug: String = "",
+    val seriesName: String? = null,
+    val seriesSlug: String? = null,
+    val scheduledFor: String = "",
+    val timezone: String? = null,
+    val status: String = "scheduled",
+    val live: Boolean = false,
+    val adjusted: Boolean = false,
+    val shiftMinutes: Int = 0,
+) {
+    /** True for a forecast the server has committed nothing to. */
+    val isProjected: Boolean get() = kind == "projected"
+}
+
+/** `GET /public/events` — the calendar for a window, ascending by instant. */
+@Serializable
+data class EventCalendarDto(
+    val entries: List<EventCalendarEntryDto> = emptyList(),
+    /** True when the server capped the answer; the screen says so rather than lying by omission. */
+    val truncated: Boolean = false,
+)
+
+/**
+ * One occurrence on an event's page.
+ *
+ * [phase] is the label of the phase a live run is in, resolved from the version
+ * that run PINNED — so an edit since does not relabel a run in flight. It is null
+ * on anything that is not live, which is why the screen only ever shows it there.
+ */
+@Serializable
+data class EventOccurrenceDto(
+    val runId: Long = 0,
+    val scheduledFor: String = "",
+    val timezone: String? = null,
+    val startedAt: String? = null,
+    val endedAt: String? = null,
+    val status: String = "scheduled",
+    val live: Boolean = false,
+    val scope: String? = null,
+    val phase: String? = null,
+    val resultsPublishedAt: String? = null,
+)
+
+/**
+ * One row of a published results table.
+ *
+ * [name] is whatever the module put in its participation `meta`, and there is
+ * genuinely nothing else to render when it is absent: core has no name for a
+ * character and the member key is not published, so the screen says "Unnamed"
+ * rather than inventing one.
+ *
+ * **[score] is fractional, and it has to be.** `event_run_participants.score` is
+ * `DECIMAL(18,4)`, and a module scoring by distance, time or a weighted tally
+ * writes a fraction — the live walk found `318.5` in the first row it read.
+ * Declaring it `Long` does not merely round: kotlinx REFUSES the body, the whole
+ * response fails to decode, and the screen reports a server error for a `200`.
+ * See [com.runicgateway.app.ui.events.scoreText] for how it is rendered.
+ */
+@Serializable
+data class EventParticipantDto(
+    val name: String? = null,
+    val score: Double = 0.0,
+    val rank: Int? = null,
+)
+
+/** The results table for ONE occurrence, present only once it has been published. */
+@Serializable
+data class EventResultsDto(
+    val runId: Long = 0,
+    val scheduledFor: String = "",
+    val publishedAt: String? = null,
+    val participants: List<EventParticipantDto> = emptyList(),
+)
+
+/** The arc an event belongs to, as its own page names it. */
+@Serializable
+data class EventSeriesRefDto(
+    val name: String = "",
+    val slug: String = "",
+)
+
+/** `GET /public/events/:slug` — the event. */
+@Serializable
+data class PublicEventDto(
+    val title: String = "",
+    val slug: String = "",
+    val summary: String? = null,
+    /** Sanitized HTML, written the way a wiki page and a forum post are. */
+    val body: String? = null,
+    val imageUrl: String? = null,
+    val timezone: String? = null,
+    val series: EventSeriesRefDto? = null,
+    val live: Boolean = false,
+    val current: EventOccurrenceDto? = null,
+    /**
+     * The next occurrence — **narrower than the first of [upcoming]**, and the
+     * server decides which. A cancelled occurrence still appears under what is
+     * coming, because "next Friday is off" is what somebody checking a calendar
+     * came to find out; it is not what "next" means.
+     */
+    val next: EventOccurrenceDto? = null,
+    val upcoming: List<EventOccurrenceDto> = emptyList(),
+    val past: List<EventOccurrenceDto> = emptyList(),
+    val results: EventResultsDto? = null,
+)
+
+/** The envelope `GET /public/events/:slug` answers with. */
+@Serializable
+data class PublicEventResponse(val event: PublicEventDto = PublicEventDto())
+
+/** One event as an arc lists it — the editor's order, so no dates. */
+@Serializable
+data class EventSeriesEntryDto(
+    val title: String = "",
+    val slug: String = "",
+    val summary: String? = null,
+    val imageUrl: String? = null,
+)
+
+/** `GET /public/events/series/:slug` — one arc and the listed events in it. */
+@Serializable
+data class EventSeriesDto(
+    val name: String = "",
+    val slug: String = "",
+    val description: String? = null,
+    val events: List<EventSeriesEntryDto> = emptyList(),
+)
+
+/** The envelope `GET /public/events/series/:slug` answers with. */
+@Serializable
+data class EventSeriesResponse(val series: EventSeriesDto = EventSeriesDto())
+
+/**
+ * One row of the caller's own participation history.
+ *
+ * [rank] is null until `core.results.publish` ran for that occurrence, and that
+ * is a real state rather than an error — the screen says "not published" rather
+ * than rendering a dash that reads as a bug.
+ *
+ * [id] is the participation row's own id and is what the keyset page walks back
+ * on: the list gains a row every time the reader attends something, so an offset
+ * would skip and repeat.
+ */
+@Serializable
+data class EventHistoryEntryDto(
+    val id: Long = 0,
+    val runId: Long = 0,
+    val title: String = "",
+    val slug: String = "",
+    val seriesName: String? = null,
+    val seriesSlug: String? = null,
+    val scheduledFor: String = "",
+    val startedAt: String? = null,
+    val endedAt: String? = null,
+    val timezone: String? = null,
+    val status: String = "scheduled",
+    val joinedAt: String? = null,
+    // Fractional, for the reason [EventParticipantDto.score] gives.
+    val score: Double = 0.0,
+    val rank: Int? = null,
+    val resultsPublishedAt: String? = null,
+)
+
+/** `GET /player/events/history` — self-scoped, one page. */
+@Serializable
+data class EventHistoryDto(
+    val entries: List<EventHistoryEntryDto> = emptyList(),
+)

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

@@ -72,3 +72,139 @@ data class NotificationStreamsDto(
 data class NotificationSubscriptionsDto(
     val streams: List<String>,
 )
+
+// ── The in-app channel (ENGAGEMENT.md phase 7/8) ───────────────────────────
+//
+// The inbox is the first notification surface that carries CONTENT. Everything
+// above is a preference or a content-free tickle; these four shapes are the
+// items themselves, pulled over the authenticated API after a tickle wakes the
+// app. The wire names come from `userNotifications.db.js`'s `toItem`.
+
+/**
+ * One inbox item. [read] is the flag and [readAt] the stamp, sent side by side so
+ * a client renders one without parsing the other.
+ *
+ * [url] is where the item points on the site (rendered from the template's
+ * `email.button` block) and is **null on most items** — an inbox row is complete
+ * on its own. [triggerId] is the event that produced it, in §7.2's ONE namespace,
+ * so it is the same vocabulary a push tickle's `stream` speaks.
+ */
+@Serializable
+data class NotificationItemDto(
+    val id: Long = 0,
+    val triggerId: String = "",
+    val title: String = "",
+    val body: String? = null,
+    val url: String? = null,
+    val read: Boolean = false,
+    val readAt: String? = null,
+    val createdAt: String? = null,
+)
+
+/**
+ * `GET /auth/me/notifications` — one page, newest first.
+ *
+ * Keyset-paged: the next page is `?before=<the last item's id>`, not an offset,
+ * because the list gains rows at the top while it is being read. [hasMore] comes
+ * from the server's take+1, so "is there another page" costs no second query.
+ * [unread] counts the WHOLE inbox, not the page — it rides along so a screen
+ * rendering both a badge and a list from one response cannot show the two
+ * disagreeing.
+ */
+@Serializable
+data class NotificationInboxDto(
+    val items: List<NotificationItemDto> = emptyList(),
+    val hasMore: Boolean = false,
+    val unread: Int = 0,
+)
+
+/** `GET /auth/me/notifications/unread-count` — the badge, on its own. */
+@Serializable
+data class NotificationUnreadDto(
+    val unread: Int = 0,
+)
+
+/**
+ * What both mark-read routes answer with. [unread] is the count AFTER the write,
+ * so the badge follows from the response rather than from a second call.
+ */
+@Serializable
+data class NotificationReadResultDto(
+    val ok: Boolean = false,
+    val changed: Int = 0,
+    val unread: Int = 0,
+)
+
+// ── Per-channel preferences (ENGAGEMENT.md phase 3) ────────────────────────
+
+/**
+ * One delivery channel from the registry. [modes] is what this channel accepts —
+ * `["off","instant"]` for push and in-app, `["off","instant","digest"]` for email
+ * — and the UI renders its control from THIS, never from a hardcoded set, so a
+ * channel added server-side arrives without an app release.
+ *
+ * [carriesContent] is the tickle invariant stated on the wire: push is `false`,
+ * which is why a push item's title never leaves the server.
+ */
+@Serializable
+data class NotificationChannelDto(
+    val id: String = "",
+    val label: String = "",
+    val carriesContent: Boolean = false,
+    val defaultMode: String = "off",
+    val supportsDigest: Boolean = false,
+    val modes: List<String> = emptyList(),
+)
+
+/**
+ * One subscribable id, from `GET /auth/me/notifications/channels`. The list is the
+ * UNION of push streams and event triggers in one namespace (§7.2), so an id may
+ * be a stream, a trigger, or both.
+ *
+ * [channels] is which channels apply to THIS id — a trigger-only id carries no
+ * `push` because nothing is registered to push it — and [modes] is the EFFECTIVE
+ * mode per channel: where the user has expressed nothing the server has already
+ * substituted that channel's default, and the client must not re-implement the
+ * defaulting.
+ */
+@Serializable
+data class NotificationChannelItemDto(
+    val id: String = "",
+    val label: String = "",
+    val description: String = "",
+    val personal: Boolean = false,
+    val requiresLinkedAccount: Boolean = false,
+    val ceiling: String? = null,
+    val channels: List<String> = emptyList(),
+    val modes: Map<String, String> = emptyMap(),
+)
+
+/** `GET · PUT /auth/me/notifications/channels` — the whole stored truth. */
+@Serializable
+data class NotificationChannelPrefsDto(
+    val channels: List<NotificationChannelDto> = emptyList(),
+    val items: List<NotificationChannelItemDto> = emptyList(),
+)
+
+/** One (id, channel) → mode pair of a sparse update. */
+@Serializable
+data class NotificationChannelPrefDto(
+    val id: String,
+    val channel: String,
+    val mode: String,
+)
+
+/**
+ * `PUT /auth/me/notifications/channels` body — a SPARSE update: only the pairs
+ * named are written and every other pair is left alone, so one toggle saves
+ * without the screen holding the whole table.
+ *
+ * [prefs] has no default for the same reason [NotificationSubscriptionsDto.streams]
+ * has none — kotlinx omits a property equal to its default, and the validator
+ * requires the field. Unlike that DTO there is no empty-set case to get wrong
+ * here: `off` is a mode, never an omission.
+ */
+@Serializable
+data class NotificationChannelPrefsUpdateDto(
+    val prefs: List<NotificationChannelPrefDto>,
+)

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

@@ -20,6 +20,47 @@ data class VersionDto(
     val service: String = "",
     val api: String = "",
     val server: String = "",
+    /**
+     * What CORE serves beyond the baseline every backend has (events Phase 14a;
+     * `MODULE_API.md` §2.9). Opaque strings, the same word a module uses on
+     * `GET /public/modules` so a client feature-detects one way, and a **separate
+     * list** because core is not a module.
+     *
+     * **The value is in what is absent**, which is why the default is empty
+     * rather than something meaningful: a backend released before a capability
+     * existed omits the key entirely, and that is how the app tells an older site
+     * from one that simply has nothing to show. An unknown string is absent, and
+     * no route may be inferred from one.
+     */
+    val capabilities: List<String> = emptyList(),
+)
+
+/**
+ * One installed, **started** module on `GET /public/modules`.
+ *
+ * A module that is disabled or failed to load is absent rather than listed with a
+ * state — its routes and its nav are absent too, so a client renders a site
+ * without that capability rather than one advertising a capability that 503s.
+ */
+@Serializable
+data class InstalledModuleDto(
+    val id: String = "",
+    val name: String = "",
+    val version: String = "",
+    val capabilities: List<String> = emptyList(),
+)
+
+/**
+ * `GET /public/modules` — what this backend is serving beyond core.
+ *
+ * Database-free and never gated by site mode, so the app can feature-detect
+ * during maintenance. A **500** is the one answer that is not an answer: core
+ * refuses to return `[]` for a list read before its loader ran, because a caller
+ * cannot tell an empty list from a mis-ordered boot.
+ */
+@Serializable
+data class ModulesDto(
+    val modules: List<InstalledModuleDto> = emptyList(),
 )
 
 /** `GET /public/status` — site mode + version for the first-run probe (§3). */

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

@@ -0,0 +1,196 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.data.api.dto
+
+import kotlinx.serialization.Serializable
+import kotlinx.serialization.json.JsonElement
+import kotlinx.serialization.json.JsonNull
+import kotlinx.serialization.json.JsonObject
+import kotlinx.serialization.json.JsonPrimitive
+
+/**
+ * DTOs for `module-rust`'s public read path (`docs/modules/rust/PLAN.md` §17,
+ * §18; M14).
+ *
+ * **Every one of these renders while the game is off**, which is the module's own
+ * promise and therefore this leg's: the website never calls a game server from a
+ * page, it answers from its own tables, and a server nobody can reach answers
+ * `online: false` with everything it last said still attached. Nothing here has
+ * an "unavailable" shape, because there is no such answer on this wire.
+ */
+
+/** `GET /public/rust/servers` — every server this site follows. */
+@Serializable
+data class RustServerListDto(
+    val servers: List<RustServerDto> = emptyList(),
+)
+
+/** `GET /public/rust/servers/{id}` — one of them, or a 404. */
+@Serializable
+data class RustServerResponse(
+    val server: RustServerDto = RustServerDto(),
+)
+
+/**
+ * One Rust server and what it last reported.
+ *
+ * **[online] and [stale] are not the same fact and the screen needs both.**
+ * `online` is what the last frame said; `stale` is whether anything has arrived
+ * recently enough to believe it. The server computes `online` as *"the row says
+ * up AND the row is fresh"*, so a stale row can never claim a server is up — but
+ * `stale` still has to come through, because a fresh row saying "down" and a row
+ * nobody has written in an hour are different things to say to a reader.
+ *
+ * **[lastSeenAt] is what a page means by "last reported", and [updatedAt] is
+ * not.** The module shipped a defect on exactly this in phase 3 and fixed it in
+ * phase 4: `updatedAt` moves on every poll including a FAILED one, so reading it
+ * as "last reported" made an offline server claim it had just checked in, every
+ * thirty seconds, for as long as it stayed down. Only a frame moves
+ * `lastSeenAt`. The app must not repeat the mistake one tier along.
+ */
+@Serializable
+data class RustServerDto(
+    val id: String = "",
+    val name: String = "",
+    val online: Boolean = false,
+    val players: Int = 0,
+    val maxPlayers: Int = 0,
+    val hostname: String? = null,
+    val level: String? = null,
+    val worldSize: Int? = null,
+    val seed: Long? = null,
+    /** The CURRENT wipe, from the state row rather than the newest ingested wipe. */
+    val wipeId: String? = null,
+    val wipedAt: String? = null,
+    /** When a frame last arrived. What "last reported" means. */
+    val lastSeenAt: String? = null,
+    /** When this module last wrote the row — a failed poll moves it too. */
+    val updatedAt: String? = null,
+    val stale: Boolean = false,
+)
+
+/** `GET /public/rust/servers/{id}/events` — the killfeed and everything else public. */
+@Serializable
+data class RustEventListDto(
+    val events: List<RustEventDto> = emptyList(),
+)
+
+/**
+ * One stored frame.
+ *
+ * **[frame] is deliberately untyped.** The module stores the whole frame the
+ * bridge plugin emitted and indexes only the columns it serves, so the fields
+ * differ per [kind] and a later protocol adds more. A sealed hierarchy here would
+ * have to be extended in this repo before a server running a newer plugin could
+ * say anything new, and the module's own rule is the opposite: an unknown kind
+ * renders as itself rather than being dropped. [RustFeed] is the one place that
+ * knows the field names.
+ *
+ * [t] is epoch milliseconds — the stamp the plugin put on the frame, not a
+ * database column, so it is a number here and an ISO string everywhere else on
+ * this wire.
+ */
+@Serializable
+data class RustEventDto(
+    val id: Long = 0,
+    val kind: String = "",
+    val t: Long = 0,
+    val wipeId: String? = null,
+    val steamId: String? = null,
+    val frame: JsonObject = JsonObject(emptyMap()),
+) {
+    /**
+     * One frame field as text, or null.
+     *
+     * **A JSON `null` answers null, not the four letters.** The plugin writes
+     * explicit nulls — `reason` on a clean disconnect, `weapon` on a fall — and a
+     * primitive's `content` is the string `"null"` for every one of them, which
+     * would put the word into a killfeed line. An empty string answers null too:
+     * the callers here all mean "is there something to show".
+     */
+    fun str(key: String): String? = primitive(key)?.content?.takeIf { it.isNotEmpty() }
+
+    /** One frame field as a number, or null when it is absent, null or not one. */
+    fun num(key: String): Double? = primitive(key)?.content?.toDoubleOrNull()
+
+    /** One frame field as a flag. Absent, null and anything non-boolean are all false. */
+    fun flag(key: String): Boolean = primitive(key)?.content == "true"
+
+    /** The raw element, for a caller that wants to decide for itself. */
+    fun raw(key: String): JsonElement? = frame[key]
+
+    private fun primitive(key: String): JsonPrimitive? =
+        (frame[key] as? JsonPrimitive)?.takeIf { it !is JsonNull }
+}
+
+/** `GET /public/rust/servers/{id}/leaderboard` — per wipe, or all-time. */
+@Serializable
+data class RustLeaderboardDto(
+    val leaderboard: List<RustLeaderboardRowDto> = emptyList(),
+)
+
+/**
+ * One player's standing.
+ *
+ * All-time is these same per-wipe rows summed rather than a second set of
+ * counters, so the two can never disagree — which is why a player who appears
+ * only in an older wipe **drops out** of the current one rather than reading
+ * zero. The screen must not fill that gap in with zeroes.
+ */
+@Serializable
+data class RustLeaderboardRowDto(
+    val steamId: String = "",
+    val name: String? = null,
+    val kills: Int = 0,
+    val deaths: Int = 0,
+    val npcKills: Int = 0,
+    val structures: Int = 0,
+    val playtimeSec: Long = 0,
+    val lastSeen: String? = null,
+)
+
+/** `GET /public/rust/servers/{id}/wipes` — every wipe this server has had, newest first. */
+@Serializable
+data class RustWipeListDto(
+    val wipes: List<RustWipeDto> = emptyList(),
+)
+
+/**
+ * One wipe.
+ *
+ * [wipeId] is derived by the bridge plugin from the save's creation time and
+ * stamped on every frame, so it is the same id the feed and the leaderboard are
+ * filtered by — which is what makes the per-wipe view navigable at all.
+ */
+@Serializable
+data class RustWipeDto(
+    val wipeId: String = "",
+    val saveCreatedAt: String? = null,
+    val firstSeen: String? = null,
+    val lastSeen: String? = null,
+)
+
+/** `GET /public/rust/servers/{id}/online` — who is on right now. */
+@Serializable
+data class RustOnlineDto(
+    val players: List<RustPresenceDto> = emptyList(),
+)
+
+/**
+ * One row of the presence board.
+ *
+ * Read from the board the bridge re-sends on every connect and every minute,
+ * rather than counted from connect and disconnect events — so it is right even
+ * after the website has missed one. **An unreachable server does not clear it**,
+ * deliberately: these rows are still the best answer anybody has. Presented bare
+ * they read as *who is on right now*, which is the one thing an offline server
+ * cannot be saying, so the screen has to say which it is.
+ */
+@Serializable
+data class RustPresenceDto(
+    val steamId: String = "",
+    val name: String? = null,
+    val sleeping: Boolean = false,
+    val connectedAt: String? = null,
+)

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

@@ -6,6 +6,7 @@ package com.runicgateway.app.data.repository
 import com.runicgateway.app.core.auth.DeviceNameProvider
 import com.runicgateway.app.core.auth.SessionManager
 import com.runicgateway.app.core.auth.TrustTokenStore
+import com.runicgateway.app.core.inbox.InboxCache
 import com.runicgateway.app.core.push.PushManager
 import com.runicgateway.app.data.api.AuthApi
 import com.runicgateway.app.data.api.SsoApi
@@ -35,6 +36,7 @@ class AuthRepository @Inject constructor(
     private val ssoApi: SsoApi,
     private val sessionManager: SessionManager,
     private val pushManager: PushManager,
+    private val inboxCache: InboxCache,
     private val trustTokenStore: TrustTokenStore,
     private val deviceNameProvider: DeviceNameProvider,
     private val json: Json,
@@ -183,6 +185,18 @@ class AuthRepository @Inject constructor(
         } catch (_: Exception) {
             // Ignore — local session teardown proceeds regardless.
         }
+        // Drop the cached inbox with it: those are one person's notifications, and
+        // they have finished with this device. This is the tidy-up, not the
+        // safeguard — InboxCache scopes every snapshot to (base URL, user id), so
+        // the paths that never reach here (a dead refresh, a server switch) cannot
+        // surface one account's items under another's session either.
+        try {
+            inboxCache.clear()
+        } catch (e: CancellationException) {
+            throw e
+        } catch (_: Exception) {
+            // Ignore — same reason.
+        }
         val refreshToken = sessionManager.currentRefreshToken()
         try {
             authApi.logout(MobileLogoutRequest(refreshToken = refreshToken, all = allDevices))

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

@@ -29,6 +29,7 @@ class ConnectionRepository @Inject constructor(
     private val sessionManager: SessionManager,
     private val trustTokenStore: TrustTokenStore,
     private val shardFeaturesRepository: ShardFeaturesRepository,
+    private val siteCapabilitiesRepository: SiteCapabilitiesRepository,
     private val pushManager: com.runicgateway.app.core.push.PushManager,
     private val config: com.runicgateway.app.core.AppConfig,
 ) {
@@ -116,6 +117,10 @@ class ConnectionRepository @Inject constructor(
         // a switch between two signed-out hosts changes no session, so nothing else
         // invalidates the cache and the new shard would inherit the old one's menu.
         shardFeaturesRepository.invalidate()
+        // Same argument, one layer up: what the OLD host served says nothing about
+        // the new one, and a stale "this backend has no game module" would hide the
+        // new host's shard rows until its first successful read.
+        siteCapabilitiesRepository.invalidate()
         prefs.clear()
         baseUrlHolder.set(null)
     }

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

@@ -0,0 +1,61 @@
+/*
+ * 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.map
+import com.runicgateway.app.core.result.safeApiCall
+import com.runicgateway.app.data.api.EventsApi
+import com.runicgateway.app.data.api.dto.EventCalendarDto
+import com.runicgateway.app.data.api.dto.EventHistoryEntryDto
+import com.runicgateway.app.data.api.dto.EventSeriesDto
+import com.runicgateway.app.data.api.dto.PublicEventDto
+import javax.inject.Inject
+import javax.inject.Singleton
+
+/**
+ * The event calendar, event pages, arcs and the caller's own participation
+ * history (PLAN.md §6.1, §9 M13).
+ *
+ * The two single-object reads unwrap their envelope here rather than in a view
+ * model, so a screen never holds a `…Response` whose only job was to carry one
+ * field. The calendar and the history keep theirs: `truncated` is a fact about
+ * the answer that the screen renders, and the history's page is a list the pager
+ * appends to.
+ */
+@Singleton
+class EventsRepository @Inject constructor(
+    private val api: EventsApi,
+) {
+    /** The public calendar. Both ends optional; the server's default window is 31 days. */
+    suspend fun calendar(
+        from: String? = null,
+        to: String? = null,
+        seriesId: Long? = null,
+    ): ApiResult<EventCalendarDto> = safeApiCall { api.getCalendar(from, to, seriesId) }
+
+    /**
+     * One event, optionally about one occurrence.
+     *
+     * [run] is passed through untouched — including a run that belongs to some
+     * other event, which the server ignores rather than refusing. Filtering it
+     * here would turn a stale link into a dead end instead of a page about the
+     * thing the link was about.
+     */
+    suspend fun event(slug: String, run: String? = null): ApiResult<PublicEventDto> =
+        safeApiCall { api.getEvent(slug, run?.takeIf { it.isNotBlank() }) }.map { it.event }
+
+    /** One arc. A series with nothing listed in it answers 404, not an empty page. */
+    suspend fun series(slug: String): ApiResult<EventSeriesDto> =
+        safeApiCall { api.getSeries(slug) }.map { it.series }
+
+    /**
+     * One page of the caller's own participation history, newest first.
+     *
+     * [before] is the id of the last row already shown — a keyset page, not an
+     * offset, because the list gains rows at the top as the reader attends things.
+     */
+    suspend fun history(limit: Int, before: Long? = null): ApiResult<List<EventHistoryEntryDto>> =
+        safeApiCall { api.getHistory(limit, before) }.map { it.entries }
+}

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

@@ -6,16 +6,23 @@ 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.NotificationChannelPrefDto
+import com.runicgateway.app.data.api.dto.NotificationChannelPrefsDto
+import com.runicgateway.app.data.api.dto.NotificationChannelPrefsUpdateDto
+import com.runicgateway.app.data.api.dto.NotificationInboxDto
+import com.runicgateway.app.data.api.dto.NotificationReadResultDto
 import com.runicgateway.app.data.api.dto.NotificationStreamsDto
 import com.runicgateway.app.data.api.dto.NotificationSubscriptionsDto
+import com.runicgateway.app.data.api.dto.NotificationUnreadDto
 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
+ * Device registration, stream subscriptions, per-channel preferences and the
+ * in-app inbox — the whole `/auth/me` notification surface (PLAN.md §11,
+ * ENGAGEMENT.md phases 3 and 7/8). 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).
  */
@@ -37,4 +44,33 @@ class NotificationsRepository @Inject constructor(
 
     suspend fun setSubscriptions(streams: List<String>): ApiResult<NotificationSubscriptionsDto> =
         safeApiCall { api.putSubscriptions(NotificationSubscriptionsDto(streams)) }
+
+    // ── Per-channel preferences (phase 3) ──────────────────────────────────
+
+    suspend fun channelPrefs(): ApiResult<NotificationChannelPrefsDto> =
+        safeApiCall { api.channelPrefs() }
+
+    /**
+     * Write ONE (id, channel) → mode pair. The endpoint is sparse, so a screen
+     * saving a single toggle sends a single row and cannot disturb the others —
+     * including the ones it does not render.
+     */
+    suspend fun setChannelMode(id: String, channel: String, mode: String): ApiResult<NotificationChannelPrefsDto> =
+        safeApiCall {
+            api.putChannelPrefs(
+                NotificationChannelPrefsUpdateDto(listOf(NotificationChannelPrefDto(id, channel, mode))),
+            )
+        }
+
+    // ── The inbox (phase 7/8) ──────────────────────────────────────────────
+
+    /** One page, newest first. [before] is the previous page's last id, never an offset. */
+    suspend fun inbox(before: Long? = null, unreadOnly: Boolean = false): ApiResult<NotificationInboxDto> =
+        safeApiCall { api.inbox(before = before, unread = if (unreadOnly) true else null) }
+
+    suspend fun unreadCount(): ApiResult<NotificationUnreadDto> = safeApiCall { api.unreadCount() }
+
+    suspend fun markRead(id: Long): ApiResult<NotificationReadResultDto> = safeApiCall { api.markRead(id) }
+
+    suspend fun markAllRead(): ApiResult<NotificationReadResultDto> = safeApiCall { api.markAllRead() }
 }

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

@@ -0,0 +1,84 @@
+/*
+ * 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.map
+import com.runicgateway.app.core.result.safeApiCall
+import com.runicgateway.app.data.api.RustApi
+import com.runicgateway.app.data.api.dto.RustEventDto
+import com.runicgateway.app.data.api.dto.RustLeaderboardRowDto
+import com.runicgateway.app.data.api.dto.RustPresenceDto
+import com.runicgateway.app.data.api.dto.RustServerDto
+import com.runicgateway.app.data.api.dto.RustWipeDto
+import javax.inject.Inject
+import javax.inject.Singleton
+
+/**
+ * The Rust module's public read path (PLAN.md §9 M14).
+ *
+ * Every read unwraps its envelope here rather than in a view model, so no screen
+ * holds a `…Dto` whose only job was to carry one list. Nothing is cached and
+ * nothing is merged: the module's tables are already the cache — the site's whole
+ * premise is that it answers from what a server last said rather than from the
+ * server — so a second copy in the app would only add a way for the two to
+ * disagree.
+ */
+@Singleton
+class RustRepository @Inject constructor(
+    private val api: RustApi,
+) {
+    /** Every server this site follows, with what each last reported. */
+    suspend fun servers(): ApiResult<List<RustServerDto>> =
+        safeApiCall { api.getServers() }.map { it.servers }
+
+    /** One server. A 404 here means no such server, or one an operator disabled. */
+    suspend fun server(id: String): ApiResult<RustServerDto> =
+        safeApiCall { api.getServer(id) }.map { it.server }
+
+    /**
+     * The feed.
+     *
+     * [kinds] is joined here rather than by a caller, so the query string this
+     * app sends exists in one place — and an **empty** list is sent as no `kind`
+     * parameter at all, which asks for the whole allowlist. Sending `kind=` would
+     * ask for a kind named the empty string.
+     */
+    suspend fun events(
+        id: String,
+        kinds: List<String> = emptyList(),
+        wipe: String? = null,
+        limit: Int? = null,
+    ): ApiResult<List<RustEventDto>> = safeApiCall {
+        api.getEvents(
+            id = id,
+            kind = kinds.takeIf { it.isNotEmpty() }?.joinToString(","),
+            wipe = wipe?.takeIf { it.isNotBlank() },
+            limit = limit,
+        )
+    }.map { it.events }
+
+    /** The leaderboard: per wipe when [wipe] is given, all-time otherwise. */
+    suspend fun leaderboard(
+        id: String,
+        wipe: String? = null,
+        sort: String? = null,
+        limit: Int? = null,
+    ): ApiResult<List<RustLeaderboardRowDto>> = safeApiCall {
+        api.getLeaderboard(
+            id = id,
+            wipe = wipe?.takeIf { it.isNotBlank() },
+            sort = sort?.takeIf { it.isNotBlank() },
+            limit = limit,
+        )
+    }.map { it.leaderboard }
+
+    /** Every wipe this server has had, newest first. */
+    suspend fun wipes(id: String): ApiResult<List<RustWipeDto>> =
+        safeApiCall { api.getWipes(id) }.map { it.wipes }
+
+    /** The presence board. Rows survive an unreachable server, by design. */
+    suspend fun online(id: String): ApiResult<List<RustPresenceDto>> =
+        safeApiCall { api.getOnline(id) }.map { it.players }
+}

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

@@ -0,0 +1,182 @@
+/*
+ * 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 kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.StateFlow
+import kotlinx.coroutines.flow.asStateFlow
+import kotlinx.coroutines.sync.Mutex
+import kotlinx.coroutines.sync.withLock
+import javax.inject.Inject
+import javax.inject.Singleton
+
+/**
+ * What this BACKEND serves — core's own capabilities and every started module's
+ * (PLAN.md §5, §9 M13; `docs/website/MODULE_API.md` §2.9).
+ *
+ * ## Why this exists at all, and why it is not [ShardFeaturesRepository]
+ *
+ * The two answer different questions and neither can answer the other's:
+ *
+ *  - **Capability — is this module installed at all?** Per HOST. It changes when
+ *    an operator installs or removes a module, so it is resolved beside the
+ *    appearance and invalidated on a server switch.
+ *  - **Feature — does this shard publish this surface to this viewer?** Per
+ *    VIEWER. It changes on sign-in, which is why it is resolved on every session
+ *    change.
+ *
+ * Without the first, the app cannot tell a module that is **not installed** from
+ * a lookup that failed: `GET /public/shard/features` 404s in both cases, and
+ * [ShardFeaturesRepository] maps every failure to "unknown", which [canSee]
+ * treats as visible. On a site running a different game that renders every shard
+ * row in the drawer and every one of them 404s when tapped.
+ *
+ * ## Absence of an answer is not an answer of absence
+ *
+ * The distinction this class exists to make, and the reason [SiteCapabilities]
+ * carries no "unknown" member of its own — the *absence of the whole value* is
+ * the unknown state:
+ *
+ *  - a **successful** read that does not name a capability is an answer, and
+ *    [canUse] hides what needs it;
+ *  - a **failed** read keeps the last answer this host gave, because a moment
+ *    with no connectivity is not an uninstall;
+ *  - a host that has **never** answered leaves the value null, and [canUse]
+ *    passes — the drawer renders as it did before this existed rather than
+ *    flickering its rows in on every cold start.
+ *
+ * The last one is deliberately the same fail-open direction [canSee] takes, for
+ * the same reason: the server gates every call regardless, so the cost of
+ * guessing wrong is a link that briefly 404s.
+ */
+@Singleton
+class SiteCapabilitiesRepository @Inject constructor(
+    private val api: PublicApi,
+) {
+    private val _capabilities = MutableStateFlow<SiteCapabilities?>(null)
+
+    /** The current answer, or `null` while this host has never given one. */
+    val capabilities: StateFlow<SiteCapabilities?> = _capabilities.asStateFlow()
+
+    // Serializes concurrent refreshes: the shell refreshes on resume and the
+    // connect flow refreshes on first load, and two overlapping reads would race
+    // to publish.
+    private val mutex = Mutex()
+
+    /**
+     * Re-resolve what this backend serves.
+     *
+     * **Two calls, and one failing is not the same as both failing.** Core's list
+     * and a module's are separate lists (§2.9), so they are merged from separate
+     * reads and each is kept only if it answered. A backend released before
+     * events omits `capabilities` from its `version` block entirely, which is an
+     * answer — the empty list — and not a failure.
+     */
+    suspend fun refresh() = mutex.withLock {
+        val status = safeApiCall { api.getStatus() }
+        val modules = safeApiCall { api.getModules() }
+
+        // Neither call answered: keep whatever this host said last, which for a
+        // host that has never answered is still null.
+        if (status !is ApiResult.Ok && modules !is ApiResult.Ok) return@withLock
+
+        val previous = _capabilities.value
+        val core = (status as? ApiResult.Ok)?.data?.version?.capabilities?.toSet()
+            ?: previous?.core
+            ?: emptySet()
+        val installed = (modules as? ApiResult.Ok)?.data?.modules
+            ?.flatMap { it.capabilities }
+            ?.toSet()
+            ?: previous?.modules
+            ?: emptySet()
+
+        _capabilities.value = SiteCapabilities(core = core, modules = installed)
+    }
+
+    /**
+     * Drop the answer. Called on a Settings → Server switch: capabilities belong
+     * to the host that reported them, and the new host must not inherit them —
+     * a switch between two signed-out hosts changes no session, so nothing else
+     * would invalidate this.
+     */
+    fun invalidate() {
+        _capabilities.value = null
+    }
+}
+
+/**
+ * What one backend serves, as two lists rather than one.
+ *
+ * They are kept apart because core is not a module: merging them would leave the
+ * app unable to tell *"this backend has events"* from *"a module called core
+ * happens to be installed"*, which is exactly the distinction
+ * `GET /public/modules` exists to make. [canUse] looks in both, because a menu
+ * entry does not care which half serves it — but the halves stay separable, so a
+ * future caller that does care still can.
+ */
+data class SiteCapabilities(
+    /** Core's own, from the `version` block. Empty on a backend that predates them. */
+    val core: Set<String>,
+    /** Every started module's, flattened. Two modules may declare the same string. */
+    val modules: Set<String>,
+) {
+    /** True when either half names [capability]. */
+    operator fun contains(capability: String): Boolean =
+        capability in core || capability in modules
+}
+
+/**
+ * True when [capability] may be relied on — **or when this host has not answered
+ * yet**.
+ *
+ * The null case is the fail-open one and it is not the same as the empty one: a
+ * [SiteCapabilities] that names nothing is a backend that told us it serves
+ * nothing extra, and that hides. See the class doc above.
+ *
+ * `null` [capability] means the caller declared none, which always passes.
+ */
+fun canUse(capabilities: SiteCapabilities?, capability: String?): Boolean =
+    capability == null || capabilities == null || capability in capabilities
+
+/**
+ * The capability strings the app gates on.
+ *
+ * **Deliberately few.** `module-uo` declares eight, and gating each shard row on
+ * its own would be a second, worse copy of what the per-viewer feature flags
+ * already decide — and one that drifts, because a capability is opaque to core
+ * and nothing checks the two agree. One string answers the only question a
+ * capability can: is the module there.
+ */
+object Capability {
+    /**
+     * A game module serving a live shard. Declared by `module-uo`; a different
+     * game's module that serves the same surfaces would declare it too, which is
+     * the point of an opaque string.
+     */
+    const val SHARD = "shard"
+
+    /**
+     * The Rust module (`docs/modules/rust/PLAN.md` D16, phase 5).
+     *
+     * A second game module, and therefore a second string rather than a second
+     * meaning for [SHARD]: a Rust site is a **fleet of servers** with a list
+     * above them, where a shard is one place — the surfaces are not the same
+     * shape and a client cannot render one as the other.
+     *
+     * `module-rust` also declares `servers`, `killfeed`, `leaderboard`,
+     * `presence` and `wipes`, and this gates on none of them. Every one of those
+     * names a SURFACE, and core flattens all modules' capabilities into one list
+     * — so `servers` is a word another module could declare tomorrow, which would
+     * silently reveal these rows on a site that does not run Rust. `rust` is the
+     * string only that module can mean, which is the same job [SHARD] does for
+     * `module-uo`.
+     */
+    const val RUST = "rust"
+
+    /** Core's event system (events Phase 14a). Never a module's. */
+    const val EVENTS = "events"
+}

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

@@ -15,11 +15,13 @@ 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.EventsApi
 import com.runicgateway.app.data.api.MeApi
 import com.runicgateway.app.data.api.AdminApi
 import com.runicgateway.app.data.api.NotificationsApi
 import com.runicgateway.app.data.api.PlayerShardApi
 import com.runicgateway.app.data.api.PublicApi
+import com.runicgateway.app.data.api.RustApi
 import com.runicgateway.app.data.api.SsoApi
 import dagger.Module
 import dagger.Provides
@@ -122,6 +124,28 @@ object NetworkModule {
     fun providePlayerShardApi(retrofit: Retrofit): PlayerShardApi =
         retrofit.create(PlayerShardApi::class.java)
 
+    /**
+     * The event surface (§9 M13). Three public reads and one bearer-authed player
+     * read on one interface — they are all CORE routes, so none of them is a
+     * module path and none is under `/shard`.
+     */
+    @Provides
+    @Singleton
+    fun provideEventsApi(retrofit: Retrofit): EventsApi = retrofit.create(EventsApi::class.java)
+
+    /**
+     * `module-rust`'s public read path (§9 M14).
+     *
+     * A MODULE's routes, unlike [provideEventsApi] beside it — they exist only on
+     * a backend where an operator installed the Rust module, and the drawer rows
+     * that lead to them are gated on its `rust` capability. Provided
+     * unconditionally all the same: a Retrofit interface costs nothing until
+     * something calls it, and there is nowhere at injection time to ask.
+     */
+    @Provides
+    @Singleton
+    fun provideRustApi(retrofit: Retrofit): RustApi = retrofit.create(RustApi::class.java)
+
     /** Opt-in push devices + subscriptions (§11, M7) — bearer-authed on the main client. */
     @Provides
     @Singleton

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

@@ -11,13 +11,16 @@ import com.runicgateway.app.core.auth.TokenStore
 import com.runicgateway.app.core.auth.TrustTokenStore
 import com.runicgateway.app.core.auth.sso.EncryptedPendingSsoStore
 import com.runicgateway.app.core.auth.sso.PendingSsoStore
+import com.runicgateway.app.core.inbox.DataStoreInboxCache
+import com.runicgateway.app.core.inbox.InboxCache
 import dagger.Binds
 import dagger.Module
 import dagger.hilt.InstallIn
 import dagger.hilt.components.SingletonComponent
 import javax.inject.Singleton
 
-/** Binds the at-rest stores to their EncryptedSharedPreferences impls (§4.3). */
+/** Binds the at-rest stores to their implementations — EncryptedSharedPreferences
+ *  for anything secret (§4.3), plain DataStore for the inbox snapshot. */
 @Module
 @InstallIn(SingletonComponent::class)
 abstract class StorageModule {
@@ -38,4 +41,9 @@ abstract class StorageModule {
     @Binds
     @Singleton
     abstract fun bindDeviceNameProvider(impl: BuildDeviceNameProvider): DeviceNameProvider
+
+    /** The inbox's offline snapshot — plain DataStore, not encrypted (ENGAGEMENT.md phase 8). */
+    @Binds
+    @Singleton
+    abstract fun bindInboxCache(impl: DataStoreInboxCache): InboxCache
 }

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

@@ -11,6 +11,7 @@ import com.runicgateway.app.core.result.ApiResult
 import com.runicgateway.app.data.appearance.SiteAppearance
 import com.runicgateway.app.data.repository.ConnectionRepository
 import com.runicgateway.app.data.repository.SettingsRepository
+import com.runicgateway.app.data.repository.SiteCapabilitiesRepository
 import dagger.hilt.android.lifecycle.HiltViewModel
 import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.StateFlow
@@ -29,6 +30,7 @@ class AppViewModel @Inject constructor(
     private val settingsRepository: SettingsRepository,
     private val baseUrlHolder: BaseUrlHolder,
     private val pushManager: PushManager,
+    private val siteCapabilitiesRepository: SiteCapabilitiesRepository,
 ) : ViewModel() {
 
     sealed interface AppState {
@@ -76,6 +78,12 @@ class AppViewModel @Inject constructor(
     fun refreshAppearance() {
         if (_state.value !is AppState.Ready) return
         viewModelScope.launch {
+            // What the backend SERVES is a per-host fact and refreshes on the same
+            // clock as the appearance: an operator who installs a module while the
+            // app is backgrounded should see its rows on the next resume. Done
+            // before the early return below, because a failed settings read is no
+            // reason to skip it — they are separate calls to separate routes.
+            siteCapabilitiesRepository.refresh()
             val settings = (settingsRepository.getSettings() as? ApiResult.Ok)?.data ?: return@launch
             pushManager.setNtfyUrl(settings.push.ntfyUrl)
             // changeServer() may have raced us back to the connect screen while the
@@ -100,6 +108,7 @@ class AppViewModel @Inject constructor(
      * or sign-in. Returns [SiteAppearance.NONE] if settings couldn't be loaded.
      */
     private suspend fun loadAppearance(): SiteAppearance {
+        siteCapabilitiesRepository.refresh()
         val settings = (settingsRepository.getSettings() as? ApiResult.Ok)?.data
         pushManager.setNtfyUrl(settings?.push?.ntfyUrl)
         return SiteAppearance.from(settings)

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

@@ -0,0 +1,110 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.ui
+
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.LaunchedEffect
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.rememberUpdatedState
+import androidx.lifecycle.Lifecycle
+import androidx.lifecycle.compose.LocalLifecycleOwner
+import androidx.lifecycle.repeatOnLifecycle
+import com.runicgateway.app.core.result.ApiResult
+import kotlinx.coroutines.delay
+
+/**
+ * Repeated reads of a surface that changes while somebody is looking at it
+ * (`docs/modules/rust/PLAN.md` D14, and D17 for this leg).
+ *
+ * ## Why a refresh is not a load
+ *
+ * The app has had exactly one shape for a read until now: set [UiState.Loading],
+ * ask, replace. That is right for opening a screen and wrong for a poll — a
+ * twenty-second refresh built on it would clear the killfeed, put a spinner where
+ * it was and re-fill it, three times a minute, for ever. The website hit the same
+ * wall one tier along: core's `useAsync` blanks its data on every dependency
+ * change, so `module-rust` bundles its own `usePolled`. This is that hook's other
+ * half.
+ *
+ * The rule both ends keep: **a refresh is invisible when it succeeds, and keeps
+ * the rows when it fails.** A site whose whole premise is "it renders while the
+ * game is off" must not blank itself the first time a request does.
+ */
+
+/** How often a live surface re-reads itself while somebody is looking at it (D17). */
+const val POLL_INTERVAL_MS = 20_000L
+
+/**
+ * What a poll produced: the state to render, and whether the last attempt failed.
+ *
+ * Two fields rather than a wider [UiState] because they are two facts and a
+ * screen renders them in different places — the rows in the list, the failure as
+ * a quiet line above it. Collapsing them would force the choice this exists to
+ * avoid: show the error and lose the rows, or keep the rows and say nothing.
+ */
+data class Polled<out T>(
+    val state: UiState<T> = UiState.Loading,
+    /** True when the most recent refresh failed **and there were rows to keep**. */
+    val refreshFailed: Boolean = false,
+)
+
+/**
+ * Fold a refresh into what is already on screen.
+ *
+ * Three cases, and the middle one is the whole point:
+ *
+ *  - **It answered.** The new data replaces the old and any previous failure
+ *    clears. This is the ordinary path and it is silent.
+ *  - **It failed, and there are rows.** The rows stay exactly as they are and the
+ *    failure is reported beside them. Nothing is blanked and nothing is retried
+ *    on the reader's behalf — the next tick is twenty seconds away.
+ *  - **It failed, and there is nothing yet.** There is nothing to protect, so it
+ *    becomes an ordinary error with a retry — which is what the first load
+ *    failing means.
+ *
+ * Pure, and takes the current state rather than reading one, so the rule is
+ * tested without a dispatcher, a view model or Compose.
+ */
+fun <T> refreshInto(current: UiState<T>, result: ApiResult<T>): Polled<T> = when {
+    result is ApiResult.Ok -> Polled(UiState.Success(result.data), refreshFailed = false)
+    current is UiState.Success -> Polled(current, refreshFailed = true)
+    else -> Polled(result.toUiState(), refreshFailed = false)
+}
+
+/**
+ * Run [block] now and every [intervalMs] for as long as this screen is resumed.
+ *
+ * `repeatOnLifecycle` is what makes this the phone's version of D14's Page
+ * Visibility gate, and it gets three behaviours from one line:
+ *
+ *  - **Nothing runs while the app is away.** The coroutine is cancelled at
+ *    `onPause`, so a backgrounded app makes no requests at all — not a slower
+ *    poll, none.
+ *  - **Coming back refreshes immediately.** The block is restarted from the top
+ *    at `onResume`, which calls [block] before the first [delay] — so the first
+ *    thing a returning reader sees is current, not up to twenty seconds old.
+ *  - **A dialog or the recents switcher pauses it**, because that is what RESUMED
+ *    means. The alternative, STARTED, keeps polling behind a partially
+ *    obscured screen, which is precisely the reader who is not reading.
+ *
+ * **Keyed on the lifecycle owner alone, and [block] is held through
+ * `rememberUpdatedState`.** Keying on the block would restart the loop on every
+ * recomposition, because a lambda is a new object each time; capturing it without
+ * `rememberUpdatedState` would freeze the *first* one, so a tab change or a
+ * newly chosen wipe would keep refreshing the question the reader has stopped
+ * asking. The loop is stable and what it calls is current.
+ */
+@Composable
+fun PollWhileResumed(intervalMs: Long = POLL_INTERVAL_MS, block: suspend () -> Unit) {
+    val lifecycleOwner = LocalLifecycleOwner.current
+    val current by rememberUpdatedState(block)
+    LaunchedEffect(lifecycleOwner) {
+        lifecycleOwner.lifecycle.repeatOnLifecycle(Lifecycle.State.RESUMED) {
+            while (true) {
+                current()
+                delay(intervalMs)
+            }
+        }
+    }
+}

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

@@ -37,6 +37,8 @@ import androidx.compose.runtime.rememberCoroutineScope
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.semantics.contentDescription
+import androidx.compose.ui.semantics.semantics
 import androidx.compose.ui.text.style.TextOverflow
 import androidx.compose.ui.unit.dp
 import androidx.compose.ui.unit.sp
@@ -55,6 +57,7 @@ import com.runicgateway.app.core.auth.Session
 import com.runicgateway.app.core.web.WebHandoff
 import com.runicgateway.app.data.api.dto.BrandDto
 import com.runicgateway.app.data.appearance.SiteAppearance
+import com.runicgateway.app.data.repository.Capability
 import com.runicgateway.app.ui.auth.AccountScreen
 import com.runicgateway.app.ui.auth.LoginScreen
 import com.runicgateway.app.ui.auth.RecoveryCodesScreen
@@ -62,6 +65,10 @@ import com.runicgateway.app.ui.auth.TrustedDevicesScreen
 import com.runicgateway.app.ui.auth.roleLabelRes
 import com.runicgateway.app.ui.components.BrandLogo
 import com.runicgateway.app.ui.contact.ContactScreen
+import com.runicgateway.app.ui.events.EventScreen
+import com.runicgateway.app.ui.events.EventSeriesScreen
+import com.runicgateway.app.ui.events.EventsScreen
+import com.runicgateway.app.ui.events.MyEventsScreen
 import com.runicgateway.app.ui.home.HomeScreen
 import com.runicgateway.app.ui.navigation.APP_MENU
 import com.runicgateway.app.ui.navigation.NavNode
@@ -75,7 +82,9 @@ import com.runicgateway.app.ui.admin.AdminContentScreen
 import com.runicgateway.app.ui.admin.AdminDashboardScreen
 import com.runicgateway.app.ui.admin.AdminModerationScreen
 import com.runicgateway.app.ui.admin.AdminSupportScreen
-import com.runicgateway.app.ui.notifications.NotificationsScreen
+import com.runicgateway.app.ui.notifications.InboxBadgeViewModel
+import com.runicgateway.app.ui.notifications.InboxScreen
+import com.runicgateway.app.ui.notifications.NotificationSettingsScreen
 import com.runicgateway.app.ui.page.PageScreen
 import com.runicgateway.app.ui.player.CharacterSheetScreen
 import com.runicgateway.app.ui.player.CharactersScreen
@@ -93,6 +102,9 @@ import com.runicgateway.app.ui.shard.MarketScreen
 import com.runicgateway.app.ui.shard.MarketVendorScreen
 import com.runicgateway.app.ui.shard.RulesScreen
 import com.runicgateway.app.ui.shard.ShardBoard
+import com.runicgateway.app.ui.rust.RustBadgeViewModel
+import com.runicgateway.app.ui.rust.RustServerScreen
+import com.runicgateway.app.ui.rust.RustServersScreen
 import com.runicgateway.app.ui.shard.ShardScreen
 import com.runicgateway.app.ui.theme.LocalShardStructure
 import com.runicgateway.app.ui.wiki.WikiPageScreen
@@ -106,6 +118,13 @@ private val TOP_LEVEL_ROUTES = setOf(
     // on them too (M11).
     Routes.SHARD_RULES, Routes.SHARD_LEADERBOARDS, Routes.SHARD_MARKET, Routes.ATLAS,
     Routes.NOTIFICATIONS,
+    // Events (M13): the calendar and the history are drawer rows, so the drawer
+    // gesture works on them. The event page and an arc are detail screens and are
+    // deliberately absent — a back gesture there means "back", not "open the menu".
+    Routes.EVENTS, Routes.MY_EVENTS,
+    // The Rust server list is a drawer row (M14); one server's page is a detail
+    // screen and is deliberately absent — a back gesture there means "back".
+    Routes.RUST,
     Routes.PLAYER_CHARACTERS, Routes.PLAYER_VENDORS, Routes.PLAYER_HOUSES,
     Routes.ADMIN_DASHBOARD, Routes.ADMIN_CONTENT, Routes.ADMIN_MODERATION, Routes.ADMIN_SUPPORT,
 )
@@ -124,8 +143,11 @@ fun RunicApp(
     onChangeServer: () -> Unit,
     modifier: Modifier = Modifier,
     deepLinkStream: String? = null,
+    deepLinkRef: String? = null,
     onDeepLinkConsumed: () -> Unit = {},
     sessionViewModel: SessionViewModel = hiltViewModel(),
+    inboxBadgeViewModel: InboxBadgeViewModel = hiltViewModel(),
+    rustBadgeViewModel: RustBadgeViewModel = hiltViewModel(),
 ) {
     val brand = appearance.brand
     val navController = rememberNavController()
@@ -135,17 +157,44 @@ fun RunicApp(
     val session by sessionViewModel.session.collectAsStateWithLifecycle()
     // What this shard publishes, independently of who the caller is (§5, M11).
     val shardFeatures by sessionViewModel.shardFeatures.collectAsStateWithLifecycle()
+    // What this BACKEND serves at all, independently of both (§5, M13). A different
+    // question from the line above and gated separately — see `isEntryVisible`.
+    val capabilities by sessionViewModel.capabilities.collectAsStateWithLifecycle()
 
-    // Re-validate the cached role each time the app returns to the foreground (§4.3).
-    LifecycleResumeEffect(Unit) {
+    // Re-validate the cached role each time the app returns to the foreground (§4.3),
+    // and re-read the two drawer counts with it: a tickle that arrived while the app
+    // was away is exactly what brings someone back to it, and a live player count is
+    // only live if it is re-read when somebody looks.
+    LifecycleResumeEffect(capabilities) {
         sessionViewModel.revalidate()
+        inboxBadgeViewModel.refresh()
+        // The Rust count is a LIVE number, so it is re-read on the same clock the
+        // unread badge is: coming back to the app is exactly when a stale one
+        // would be noticed. Keyed on the capability answer as well as on resume,
+        // because the very first resume happens before this host has said whether
+        // the module is there — and asking then would either make a request on a
+        // site that has no Rust, or never make one at all.
+        capabilities?.let { rustBadgeViewModel.refresh(Capability.RUST in it) }
         onPauseOrDispose { }
     }
 
+    val unread by inboxBadgeViewModel.unread.collectAsStateWithLifecycle()
+    // How many people are on the Rust fleet, for the drawer row's badge — the
+    // phone's answer to D15's footer count (M14). Refreshed on resume, never on a
+    // timer: a badge is a glance, not a feed. Gated here rather than inside the
+    // view model because this is the only place that knows whether the module is
+    // installed at all, and a host that has not answered yet asks nothing.
+    val rustOnline by rustBadgeViewModel.online.collectAsStateWithLifecycle()
+    // The badge follows the session, so signing out clears it rather than leaving
+    // the previous account's count on the drawer.
+    LaunchedEffect(session) { inboxBadgeViewModel.refresh() }
+
     // A tapped push notification deep-links to its stream's screen (§11, item 7).
-    LaunchedEffect(deepLinkStream) {
+    LaunchedEffect(deepLinkStream, deepLinkRef) {
         val stream = deepLinkStream ?: return@LaunchedEffect
-        navController.navigate(Routes.forStream(stream)) {
+        // Both halves of the tickle: a `notification:` ref means there is an inbox
+        // row waiting, and that is where the tap goes (ENGAGEMENT.md phase 8).
+        navController.navigate(Routes.forTickle(stream, deepLinkRef)) {
             popUpTo(Routes.HOME) { saveState = true }
             launchSingleTop = true
         }
@@ -162,7 +211,7 @@ fun RunicApp(
     // `pruneNav` still decides what this caller may see and remains the boundary
     // (§6.1, AC-3). With no stored row the merge returns APP_MENU itself.
     val nav = pruneNav(buildNavTree(APP_MENU, appearance.navPublic)) {
-        isEntryVisible(it, session, shardFeatures)
+        isEntryVisible(it, session, shardFeatures, capabilities)
     }
 
     val context = LocalContext.current
@@ -234,12 +283,23 @@ fun RunicApp(
                             ),
                         )
                         node.items.forEach { child ->
-                            NavRow(child, currentRoute, drawerItemColors, indented = true) {
-                                openNode(child)
-                            }
+                            NavRow(
+                                node = child,
+                                currentRoute = currentRoute,
+                                colors = drawerItemColors,
+                                indented = true,
+                                unread = unread,
+                                rustOnline = rustOnline,
+                            ) { openNode(child) }
                         }
                     } else {
-                        NavRow(node, currentRoute, drawerItemColors) { openNode(node) }
+                        NavRow(
+                            node = node,
+                            currentRoute = currentRoute,
+                            colors = drawerItemColors,
+                            unread = unread,
+                            rustOnline = rustOnline,
+                        ) { openNode(node) }
                     }
                 }
 
@@ -354,6 +414,8 @@ private fun NavRow(
     currentRoute: String?,
     colors: NavigationDrawerItemColors,
     indented: Boolean = false,
+    unread: Int = 0,
+    rustOnline: Int = 0,
     onClick: () -> Unit,
 ) {
     val route = when (node) {
@@ -369,21 +431,60 @@ private fun NavRow(
         is NavNode.Section -> return
     }
     val handsOff = node is NavNode.Link && node.route == null
+    // The unread count rides on whichever row leads to the inbox — including an
+    // admin's own nav override pointing at it, since the badge belongs to the
+    // destination, not to the bundled entry.
+    val showsUnread = !handsOff && unread > 0 && route == Routes.NOTIFICATIONS
+    // The live player count rides on whichever row leads to the Rust list, for the
+    // same reason the unread count rides on whichever leads to the inbox — the
+    // number belongs to the destination, not to the bundled entry, so an admin's
+    // own nav override pointing there carries it too.
+    //
+    // **Zero renders nothing**, rather than a `0`: an empty fleet is not a
+    // notification, and a badge that read `0` on a site whose servers are simply
+    // quiet would be worse than no badge at all.
+    val showsRustOnline = !handsOff && rustOnline > 0 && route == Routes.RUST
 
     NavigationDrawerItem(
         label = { Text(label) },
         selected = route != null && currentRoute == route.substringBefore('?'),
         onClick = onClick,
-        badge = if (!handsOff) {
-            null
-        } else {
-            {
-                Icon(
-                    Icons.AutoMirrored.Filled.ExitToApp,
-                    contentDescription = stringResource(R.string.nav_opens_in_browser),
-                    modifier = Modifier.size(18.dp),
-                )
+        badge = when {
+            handsOff -> {
+                {
+                    Icon(
+                        Icons.AutoMirrored.Filled.ExitToApp,
+                        contentDescription = stringResource(R.string.nav_opens_in_browser),
+                        modifier = Modifier.size(18.dp),
+                    )
+                }
             }
+            showsUnread -> {
+                {
+                    // Named for a screen reader: "7" beside "Notifications" reads as
+                    // a count to a sighted user and as a bare number to everyone else.
+                    val spoken = stringResource(R.string.inbox_unread_count, unread)
+                    Text(
+                        text = unread.toString(),
+                        style = MaterialTheme.typography.labelLarge,
+                        modifier = Modifier.semantics { contentDescription = spoken },
+                    )
+                }
+            }
+            showsRustOnline -> {
+                {
+                    // Named for a screen reader: "42" beside "Rust servers" reads
+                    // as a count to a sighted user and as a bare number to
+                    // everyone else.
+                    val spoken = stringResource(R.string.rust_online_badge, rustOnline)
+                    Text(
+                        text = rustOnline.toString(),
+                        style = MaterialTheme.typography.labelLarge,
+                        modifier = Modifier.semantics { contentDescription = spoken },
+                    )
+                }
+            }
+            else -> null
         },
         colors = colors,
         // Like Card's elevation, NavigationDrawerItem takes its shape as a default
@@ -440,6 +541,50 @@ private fun RunicNavHost(
         ) {
             PostScreen()
         }
+        // Events (M13). CORE's routes, so these screens are reachable on a backend
+        // with no game module at all — which is why they sit above the shard block
+        // rather than inside it.
+        composable(Routes.EVENTS) {
+            EventsScreen(onOpenEvent = { slug -> navController.navigate(Routes.event(slug)) })
+        }
+        // The app's one route with a query argument. `run` is optional and nullable:
+        // navigating to Routes.event(slug) with no run matches this pattern with no
+        // argument, which is every route in except an announcement's link.
+        composable(
+            route = Routes.EVENT_ROUTE,
+            arguments = listOf(
+                navArgument(Routes.Args.SLUG) { type = NavType.StringType },
+                navArgument(Routes.Args.RUN) {
+                    type = NavType.StringType
+                    nullable = true
+                    defaultValue = null
+                },
+            ),
+        ) {
+            EventScreen(
+                onOpenSeries = { slug -> navController.navigate(Routes.eventSeries(slug)) },
+                onOpenRun = { slug, runId ->
+                    navController.navigate(Routes.event(slug, runId.toString()))
+                },
+            )
+        }
+        composable(
+            route = Routes.EVENT_SERIES,
+            arguments = listOf(navArgument(Routes.Args.SLUG) { type = NavType.StringType }),
+        ) {
+            EventSeriesScreen(onOpenEvent = { slug -> navController.navigate(Routes.event(slug)) })
+        }
+        composable(Routes.MY_EVENTS) {
+            // Signed out, this route is not in the drawer — but a saved back-stack
+            // entry can still be restored onto it, so the shell says where to go
+            // rather than letting the screen ask the server and render a 401.
+            when (session) {
+                is Session.SignedIn -> MyEventsScreen(onOpenRun = { slug, runId ->
+                    navController.navigate(Routes.event(slug, runId.toString()))
+                })
+                Session.SignedOut -> LaunchedEffect(Unit) { navController.navigateTopLevel(Routes.HOME) }
+            }
+        }
         composable(Routes.SHARD) {
             ShardScreen(onOpenBoard = { board ->
                 navController.navigate(
@@ -480,6 +625,17 @@ private fun RunicNavHost(
         ) { entry ->
             AtlasCreatureScreen(slug = entry.arguments?.getString(Routes.Args.SLUG).orEmpty())
         }
+        // The Rust module's two screens (M14). Not under `shard/`: a different game,
+        // a different shape — a fleet with a list above it rather than one place.
+        composable(Routes.RUST) {
+            RustServersScreen(onOpenServer = { id -> navController.navigate(Routes.rustServer(id)) })
+        }
+        composable(
+            route = Routes.RUST_SERVER,
+            arguments = listOf(navArgument(Routes.Args.SERVER_ID) { type = NavType.StringType }),
+        ) {
+            RustServerScreen(onBack = { navController.navigateTopLevel(Routes.RUST) })
+        }
         composable(Routes.WIKI) {
             WikiScreen(onOpenPage = { slug -> navController.navigate(Routes.wikiPage(slug)) })
         }
@@ -541,9 +697,24 @@ private fun RunicNavHost(
         }
         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).
+            // leaving another account's items up. The backend gates every call
+            // regardless, and the inbox routes are role-agnostic (§5) — staff have an
+            // inbox for the same reason players do, which on the web took a second
+            // mount to be true.
             when (session) {
-                is Session.SignedIn -> NotificationsScreen()
+                is Session.SignedIn -> InboxScreen(
+                    onOpenSettings = { navController.navigate(Routes.NOTIFICATIONS_SETTINGS) },
+                    // A notification whose link the app can render opens in the app.
+                    // `navigate`, not `navigateTopLevel`: the inbox is where the
+                    // reader came from and back should return there.
+                    onOpenRoute = { route -> navController.navigate(route) },
+                )
+                Session.SignedOut -> LaunchedEffect(Unit) { navController.navigateTopLevel(Routes.HOME) }
+            }
+        }
+        composable(Routes.NOTIFICATIONS_SETTINGS) {
+            when (session) {
+                is Session.SignedIn -> NotificationSettingsScreen()
                 Session.SignedOut -> LaunchedEffect(Unit) { navController.navigateTopLevel(Routes.HOME) }
             }
         }

app/src/main/java/com/runicgateway/app/ui/events/EventScreen.kt

@@ -0,0 +1,310 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.ui.events
+
+import androidx.compose.foundation.clickable
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.PaddingValues
+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.width
+import androidx.compose.foundation.lazy.LazyColumn
+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.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.data.api.dto.EventOccurrenceDto
+import com.runicgateway.app.data.api.dto.EventParticipantDto
+import com.runicgateway.app.data.api.dto.PublicEventDto
+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
+import com.runicgateway.app.ui.components.PillTone
+import com.runicgateway.app.ui.components.ShardCard
+import com.runicgateway.app.ui.components.StatusPill
+
+/**
+ * One event's public page (EVENTS.md § API surface, M13).
+ *
+ * The storyline, its arc, what is live, what is next, what happened recently, and
+ * a results table once an occurrence has published one.
+ *
+ * **The plan behind the event is never shown**, because the server never sends
+ * it: a live run carries the LABEL of the phase it is in — resolved from the
+ * version that run pinned, so an edit since does not relabel it — and nothing
+ * else. Phases, steps and actions are the operator's.
+ */
+@Composable
+fun EventScreen(
+    onOpenSeries: (String) -> Unit,
+    onOpenRun: (String, Long) -> Unit,
+    modifier: Modifier = Modifier,
+    viewModel: EventViewModel = hiltViewModel(),
+) {
+    val state by viewModel.state.collectAsStateWithLifecycle()
+
+    // Error before content. Phase 13 found the inverse of this one tier along: a
+    // `if (loading || !form)` spinner above the error branch left a failed load
+    // spinning for ever with nothing on screen naming the problem.
+    when (val s = state) {
+        is UiState.Error -> ErrorView(s.kind, onRetry = viewModel::load, modifier = modifier)
+        is UiState.Loading -> LoadingView(modifier)
+        is UiState.Success -> EventBody(s.data, onOpenSeries, onOpenRun, modifier)
+    }
+}
+
+@Composable
+private fun EventBody(
+    event: PublicEventDto,
+    onOpenSeries: (String) -> Unit,
+    onOpenRun: (String, Long) -> Unit,
+    modifier: Modifier = Modifier,
+) {
+    LazyColumn(
+        modifier = modifier.fillMaxSize(),
+        contentPadding = PaddingValues(16.dp),
+        verticalArrangement = Arrangement.spacedBy(16.dp),
+    ) {
+        item(key = "head") {
+            Column(verticalArrangement = Arrangement.spacedBy(6.dp)) {
+                Text(
+                    text = event.title,
+                    style = MaterialTheme.typography.headlineSmall,
+                    color = MaterialTheme.colorScheme.onSurface,
+                )
+                event.summary?.takeIf { it.isNotBlank() }?.let {
+                    Text(
+                        text = it,
+                        style = MaterialTheme.typography.bodyMedium,
+                        color = MaterialTheme.colorScheme.onSurfaceVariant,
+                    )
+                }
+                event.series?.let { series ->
+                    Text(
+                        text = stringResource(R.string.events_part_of, series.name),
+                        style = MaterialTheme.typography.bodyMedium,
+                        color = MaterialTheme.colorScheme.primary,
+                        modifier = Modifier.clickable { onOpenSeries(series.slug) },
+                    )
+                }
+            }
+        }
+
+        // The one fact a visitor came for, above the storyline rather than below
+        // it: whether it is happening now, and if not, when it next is.
+        item(key = "headline") { Headline(event) }
+
+        event.body?.takeIf { it.isNotBlank() }?.let { body ->
+            item(key = "body") {
+                ShardCard(Modifier.fillMaxWidth()) {
+                    // Sanitized on write, the treatment a wiki page and a forum
+                    // post already get.
+                    HtmlText(body, Modifier.padding(16.dp))
+                }
+            }
+        }
+
+        event.results?.let { results ->
+            item(key = "results-head") {
+                Column(verticalArrangement = Arrangement.spacedBy(2.dp)) {
+                    Text(
+                        text = stringResource(R.string.events_results),
+                        style = MaterialTheme.typography.titleMedium,
+                        color = MaterialTheme.colorScheme.onSurface,
+                    )
+                    Text(
+                        text = eventDateTime(results.scheduledFor, event.timezone),
+                        style = MaterialTheme.typography.bodySmall,
+                        color = MaterialTheme.colorScheme.onSurfaceVariant,
+                    )
+                }
+            }
+            if (results.participants.isEmpty()) {
+                item(key = "results-empty") {
+                    Text(
+                        text = stringResource(R.string.events_results_nobody),
+                        style = MaterialTheme.typography.bodyMedium,
+                        color = MaterialTheme.colorScheme.onSurfaceVariant,
+                    )
+                }
+            } else {
+                items(results.participants.size, key = { "p$it" }) { index ->
+                    ParticipantRow(results.participants[index])
+                }
+            }
+        }
+
+        occurrenceSection(
+            key = "upcoming",
+            titleRes = R.string.events_coming_up,
+            list = event.upcoming,
+            timezone = event.timezone,
+            slug = event.slug,
+            onOpenRun = onOpenRun,
+            linkResults = false,
+        )
+        occurrenceSection(
+            key = "past",
+            titleRes = R.string.events_previously,
+            list = event.past,
+            timezone = event.timezone,
+            slug = event.slug,
+            onOpenRun = onOpenRun,
+            linkResults = true,
+        )
+
+        if (event.current == null && event.next == null && event.past.isEmpty()) {
+            item(key = "unscheduled") {
+                Text(
+                    text = stringResource(R.string.events_never_scheduled),
+                    style = MaterialTheme.typography.bodyMedium,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                )
+            }
+        }
+    }
+}
+
+@Composable
+private fun Headline(event: PublicEventDto) {
+    ShardCard(Modifier.fillMaxWidth()) {
+        Column(Modifier.padding(16.dp), verticalArrangement = Arrangement.spacedBy(6.dp)) {
+            val current = event.current
+            when {
+                event.live && current != null -> {
+                    StatusPill(
+                        text = stringResource(R.string.events_status_live),
+                        tone = PillTone.Success,
+                    )
+                    Text(
+                        // The phase LABEL, and only while it is live.
+                        text = current.phase?.takeIf { it.isNotBlank() }
+                            ?: stringResource(R.string.events_under_way),
+                        style = MaterialTheme.typography.titleMedium,
+                        color = MaterialTheme.colorScheme.onSurface,
+                    )
+                }
+                event.next != null -> {
+                    Text(
+                        text = stringResource(R.string.events_next),
+                        style = MaterialTheme.typography.labelMedium,
+                        color = MaterialTheme.colorScheme.onSurfaceVariant,
+                    )
+                    Text(
+                        text = eventDateTime(event.next.scheduledFor, event.next.timezone ?: event.timezone),
+                        style = MaterialTheme.typography.titleMedium,
+                        color = MaterialTheme.colorScheme.onSurface,
+                    )
+                }
+                else -> Text(
+                    text = stringResource(R.string.events_nothing_scheduled),
+                    style = MaterialTheme.typography.bodyMedium,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                )
+            }
+        }
+    }
+}
+
+/**
+ * A titled list of occurrences, or nothing at all when there are none.
+ *
+ * `linkResults` is what separates the two calls: only a PAST occurrence that
+ * actually published results gets its own tap target, because on any other one
+ * `?run=` would change nothing a reader could see.
+ */
+private fun androidx.compose.foundation.lazy.LazyListScope.occurrenceSection(
+    key: String,
+    titleRes: Int,
+    list: List<EventOccurrenceDto>,
+    timezone: String?,
+    slug: String,
+    onOpenRun: (String, Long) -> Unit,
+    linkResults: Boolean,
+) {
+    if (list.isEmpty()) return
+    item(key = "$key-title") {
+        Text(
+            text = stringResource(titleRes),
+            style = MaterialTheme.typography.titleMedium,
+            color = MaterialTheme.colorScheme.onSurface,
+        )
+    }
+    items(list.size, key = { "$key-${list[it].runId}" }) { index ->
+        val occurrence = list[index]
+        val tappable = linkResults && occurrence.resultsPublishedAt != null
+        ShardCard(
+            modifier = Modifier
+                .fillMaxWidth()
+                .then(
+                    if (tappable) Modifier.clickable { onOpenRun(slug, occurrence.runId) }
+                    else Modifier,
+                ),
+        ) {
+            Row(
+                Modifier.fillMaxWidth().padding(16.dp),
+                horizontalArrangement = Arrangement.spacedBy(12.dp),
+                verticalAlignment = Alignment.CenterVertically,
+            ) {
+                Text(
+                    text = eventDateTime(occurrence.scheduledFor, occurrence.timezone ?: timezone),
+                    style = MaterialTheme.typography.bodyMedium,
+                    color = MaterialTheme.colorScheme.onSurface,
+                    modifier = Modifier.weight(1f),
+                )
+                Text(
+                    text = stringResource(
+                        statusWordRes(occurrence.status, occurrence.scheduledFor),
+                    ),
+                    style = MaterialTheme.typography.bodySmall,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                )
+            }
+        }
+    }
+}
+
+@Composable
+private fun ParticipantRow(participant: EventParticipantDto) {
+    Row(
+        Modifier.fillMaxWidth(),
+        horizontalArrangement = Arrangement.spacedBy(12.dp),
+        verticalAlignment = Alignment.CenterVertically,
+    ) {
+        Text(
+            text = participant.rank?.toString() ?: "—",
+            style = MaterialTheme.typography.bodyMedium,
+            color = MaterialTheme.colorScheme.onSurfaceVariant,
+            textAlign = TextAlign.End,
+            modifier = Modifier.width(32.dp),
+        )
+        Text(
+            // A module supplies a display name in its participation meta or it does
+            // not; the member key is never published, so there is genuinely nothing
+            // else to render.
+            text = participant.name?.takeIf { it.isNotBlank() }
+                ?: stringResource(R.string.events_participant_unnamed),
+            style = MaterialTheme.typography.bodyMedium,
+            color = MaterialTheme.colorScheme.onSurface,
+            modifier = Modifier.weight(1f),
+        )
+        Text(
+            text = scoreText(participant.score),
+            style = MaterialTheme.typography.bodyMedium,
+            color = MaterialTheme.colorScheme.onSurface,
+        )
+    }
+}

app/src/main/java/com/runicgateway/app/ui/events/EventSeriesScreen.kt

@@ -0,0 +1,113 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.ui.events
+
+import androidx.compose.foundation.clickable
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.PaddingValues
+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.width
+import androidx.compose.foundation.lazy.LazyColumn
+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.text.style.TextAlign
+import androidx.compose.ui.unit.dp
+import androidx.hilt.navigation.compose.hiltViewModel
+import androidx.lifecycle.compose.collectAsStateWithLifecycle
+import com.runicgateway.app.ui.UiState
+import com.runicgateway.app.ui.components.ErrorView
+import com.runicgateway.app.ui.components.LoadingView
+import com.runicgateway.app.ui.components.ShardCard
+
+/**
+ * One arc (EVENTS.md §I, M13).
+ *
+ * **The arc is the thing the tooling this replaces could not express at all.** A
+ * calendar plugin has no series field, so "Royal Spy Mission → Risky Partner →
+ * Message From the Void" existed only in a GM's head and in whatever the forum
+ * post said. This screen is that continuity, in the order an editor arranged it —
+ * which is why the events are numbered rather than dated: an arc has an order, and
+ * its parts may be months apart or run out of sequence.
+ */
+@Composable
+fun EventSeriesScreen(
+    onOpenEvent: (String) -> Unit,
+    modifier: Modifier = Modifier,
+    viewModel: EventSeriesViewModel = hiltViewModel(),
+) {
+    val state by viewModel.state.collectAsStateWithLifecycle()
+
+    // Error first, then loading — the order Phase 13 had to fix one tier along.
+    when (val s = state) {
+        is UiState.Error -> ErrorView(s.kind, onRetry = viewModel::load, modifier = modifier)
+        is UiState.Loading -> LoadingView(modifier)
+        is UiState.Success -> {
+            val series = s.data
+            LazyColumn(
+                modifier = modifier.fillMaxSize(),
+                contentPadding = PaddingValues(16.dp),
+                verticalArrangement = Arrangement.spacedBy(12.dp),
+            ) {
+                item(key = "head") {
+                    Column(verticalArrangement = Arrangement.spacedBy(6.dp)) {
+                        Text(
+                            text = series.name,
+                            style = MaterialTheme.typography.headlineSmall,
+                            color = MaterialTheme.colorScheme.onSurface,
+                        )
+                        series.description?.takeIf { it.isNotBlank() }?.let {
+                            Text(
+                                text = it,
+                                style = MaterialTheme.typography.bodyMedium,
+                                color = MaterialTheme.colorScheme.onSurfaceVariant,
+                            )
+                        }
+                    }
+                }
+                items(series.events.size, key = { series.events[it].slug }) { index ->
+                    val entry = series.events[index]
+                    ShardCard(
+                        modifier = Modifier
+                            .fillMaxWidth()
+                            .clickable { onOpenEvent(entry.slug) },
+                    ) {
+                        Row(
+                            Modifier.fillMaxWidth().padding(16.dp),
+                            horizontalArrangement = Arrangement.spacedBy(14.dp),
+                        ) {
+                            Text(
+                                text = (index + 1).toString(),
+                                style = MaterialTheme.typography.headlineSmall,
+                                color = MaterialTheme.colorScheme.primary,
+                                textAlign = TextAlign.End,
+                                modifier = Modifier.width(32.dp),
+                            )
+                            Column(verticalArrangement = Arrangement.spacedBy(4.dp)) {
+                                Text(
+                                    text = entry.title,
+                                    style = MaterialTheme.typography.titleMedium,
+                                    color = MaterialTheme.colorScheme.onSurface,
+                                )
+                                entry.summary?.takeIf { it.isNotBlank() }?.let {
+                                    Text(
+                                        text = it,
+                                        style = MaterialTheme.typography.bodyMedium,
+                                        color = MaterialTheme.colorScheme.onSurfaceVariant,
+                                    )
+                                }
+                            }
+                        }
+                    }
+                }
+            }
+        }
+    }
+}

app/src/main/java/com/runicgateway/app/ui/events/EventSeriesViewModel.kt

@@ -0,0 +1,50 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.ui.events
+
+import androidx.lifecycle.SavedStateHandle
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.viewModelScope
+import com.runicgateway.app.data.api.dto.EventSeriesDto
+import com.runicgateway.app.data.repository.EventsRepository
+import com.runicgateway.app.ui.UiState
+import com.runicgateway.app.ui.navigation.Routes
+import com.runicgateway.app.ui.toUiState
+import dagger.hilt.android.lifecycle.HiltViewModel
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.StateFlow
+import kotlinx.coroutines.flow.asStateFlow
+import kotlinx.coroutines.launch
+import javax.inject.Inject
+
+/**
+ * One arc (PLAN.md §9 M13).
+ *
+ * A series with nothing listed in it answers 404 rather than an empty page, so
+ * there is no "empty arc" state to render: the error branch is the whole of it,
+ * and that is the server's decision rather than this screen's — an empty page
+ * would publish that an operator has named something they have not announced.
+ */
+@HiltViewModel
+class EventSeriesViewModel @Inject constructor(
+    private val repository: EventsRepository,
+    savedStateHandle: SavedStateHandle,
+) : ViewModel() {
+
+    private val slug: String = savedStateHandle.get<String>(Routes.Args.SLUG).orEmpty()
+
+    private val _state = MutableStateFlow<UiState<EventSeriesDto>>(UiState.Loading)
+    val state: StateFlow<UiState<EventSeriesDto>> = _state.asStateFlow()
+
+    init {
+        load()
+    }
+
+    fun load() {
+        _state.value = UiState.Loading
+        viewModelScope.launch {
+            _state.value = repository.series(slug).toUiState()
+        }
+    }
+}

app/src/main/java/com/runicgateway/app/ui/events/EventTimes.kt

@@ -0,0 +1,166 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.ui.events
+
+import androidx.annotation.StringRes
+import com.runicgateway.app.R
+import com.runicgateway.app.core.time.parseWireInstant
+import java.time.Instant
+import java.time.ZoneId
+import java.time.format.DateTimeFormatter
+import java.time.format.FormatStyle
+import java.util.Locale
+
+/**
+ * Rendering an event's instant and its status word (EVENTS.md §I).
+ *
+ * Everything here is pure and takes its clock, zone and locale as parameters, so
+ * the rules below are unit-tested off-device rather than eyeballed on one.
+ *
+ * ## The split, which is the one thing about event times that is easy to get wrong
+ *
+ * The server returns UTC instants and never guesses the reader's zone. The client
+ * places them, and it places the two halves differently:
+ *
+ *  - the **day** an entry is filed under is the READER's own — "what is on this
+ *    month" is a question about the month the person holding the phone is living
+ *    in;
+ *  - the **time** beside it is always the EVENT's zone, carried on the entry —
+ *    because every listing this feature replaces is written in the shard's local
+ *    zone, and "8pm" means the shard's evening to everyone reading it.
+ *
+ * Rendering the time in the reader's zone instead is defensible and wrong here: a
+ * player in Berlin told an American shard's event is at 02:00 has been told
+ * something true and useless, and told it in a way that makes the shard's own
+ * announcement look like a mistake.
+ */
+
+/**
+ * A participation score, as a reader should see it.
+ *
+ * Scores are `DECIMAL(18,4)` on the wire because a module may score by distance,
+ * time or a weighted tally — but most score by counting, and rendering a plain
+ * tally of kills as `12.0` reads as a rounding artefact. So a whole number prints
+ * whole and a fraction keeps its digits, with trailing zeros trimmed: `1420`,
+ * `318.5`, `0.25`.
+ */
+fun scoreText(score: Double, locale: Locale = Locale.getDefault()): String {
+    if (!score.isFinite()) return "0"
+    if (score == Math.floor(score) && Math.abs(score) < 1e15) {
+        return String.format(locale, "%d", score.toLong())
+    }
+    return String.format(locale, "%.4f", score).trimEnd('0').trimEnd('.', ',')
+}
+
+/** The event's own wall clock, with the zone named so it misreads as nothing. */
+fun eventTime(
+    instant: String?,
+    timezone: String?,
+    locale: Locale = Locale.getDefault(),
+): String {
+    val at = parseWireInstant(instant) ?: return ""
+    val zone = eventZone(timezone)
+    val time = DateTimeFormatter.ofPattern("HH:mm", locale).withZone(zone).format(at)
+    return "$time ${shortZone(timezone)}"
+}
+
+/**
+ * The event's own day and time together, for a screen showing one occurrence.
+ *
+ * Localized rather than patterned, because a full date's field order is the
+ * locale's business; only the zone stays the event's.
+ */
+fun eventDateTime(
+    instant: String?,
+    timezone: String?,
+    locale: Locale = Locale.getDefault(),
+): String {
+    val at = parseWireInstant(instant) ?: return ""
+    val zone = eventZone(timezone)
+    val text = DateTimeFormatter
+        .ofLocalizedDateTime(FormatStyle.MEDIUM, FormatStyle.SHORT)
+        .withLocale(locale)
+        .withZone(zone)
+        .format(at)
+    return "$text ${shortZone(timezone)}"
+}
+
+/** The reader's own day, for the heading an entry is filed under. */
+fun readerDayLabel(
+    instant: String?,
+    zone: ZoneId = ZoneId.systemDefault(),
+    locale: Locale = Locale.getDefault(),
+): String {
+    val at = parseWireInstant(instant) ?: return ""
+    return DateTimeFormatter
+        .ofLocalizedDate(FormatStyle.FULL)
+        .withLocale(locale)
+        .withZone(zone)
+        .format(at)
+}
+
+/**
+ * The zone as a reader recognises it: `America/New_York` → `New York`.
+ *
+ * Not the abbreviation (`EDT`), which is unstable across the year and unknown to
+ * most readers of a shard in another country.
+ */
+fun shortZone(timezone: String?): String {
+    if (timezone.isNullOrBlank()) return "UTC"
+    return timezone.substringAfterLast('/').replace('_', ' ')
+}
+
+/**
+ * The event's zone, or UTC when its column holds something `java.time` will not
+ * read.
+ *
+ * A typo in a definition's timezone must still render: UTC off the instant is the
+ * honest answer when the zone cannot be honoured, and it is what the web client
+ * falls back to for the same reason.
+ */
+private fun eventZone(timezone: String?): ZoneId = try {
+    if (timezone.isNullOrBlank()) ZoneId.of("UTC") else ZoneId.of(timezone)
+} catch (_: Exception) {
+    ZoneId.of("UTC")
+}
+
+/**
+ * The word beside an occurrence, for the four statuses the server publishes.
+ *
+ * **`cancelled` needs the instant, and that is the whole reason this takes one.**
+ * The server publishes `failed` and `missed` as `cancelled` too — to a visitor the
+ * three are one event, and the difference between them is about the deployment —
+ * but the three do not share one English sentence. *Did not happen* is right for a
+ * past occurrence and a plain falsehood for a future one, and a run four days out
+ * that an operator has called off is exactly the common case: this is the defect
+ * Phase 14a's own calendar shipped and the live walk caught, which is why it is
+ * restated here rather than ported.
+ *
+ * So **the tense follows the clock, not the status**. A future call-off reads
+ * *Cancelled*; a past one reads *Did not happen*, which is also the honest word
+ * for the failed and missed runs folded in with it.
+ *
+ * An unrecognised status reads *Scheduled*, mirroring the server's own fallback:
+ * `publicStatus()` folds anything it does not know to `scheduled`, so a word the
+ * app has never seen is a contract break rather than a state, and rendering a raw
+ * enum at a reader is not an improvement on it.
+ */
+@StringRes
+fun statusWordRes(status: String?, scheduledFor: String?, now: Instant = Instant.now()): Int =
+    when (status) {
+        "live" -> R.string.events_status_live
+        "completed" -> R.string.events_status_completed
+        "cancelled" -> {
+            val at = parseWireInstant(scheduledFor)
+            // An unreadable instant is treated as past, which is the safer of the
+            // two: "did not happen" about something unplaceable in time is vague,
+            // while "cancelled" about a past run implies it is still coming.
+            if (at != null && at.isAfter(now)) {
+                R.string.events_status_cancelled
+            } else {
+                R.string.events_status_did_not_happen
+            }
+        }
+        else -> R.string.events_status_scheduled
+    }

app/src/main/java/com/runicgateway/app/ui/events/EventViewModel.kt

@@ -0,0 +1,59 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.ui.events
+
+import androidx.lifecycle.SavedStateHandle
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.viewModelScope
+import com.runicgateway.app.data.api.dto.PublicEventDto
+import com.runicgateway.app.data.repository.EventsRepository
+import com.runicgateway.app.ui.UiState
+import com.runicgateway.app.ui.navigation.Routes
+import com.runicgateway.app.ui.toUiState
+import dagger.hilt.android.lifecycle.HiltViewModel
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.StateFlow
+import kotlinx.coroutines.flow.asStateFlow
+import kotlinx.coroutines.launch
+import javax.inject.Inject
+
+/**
+ * One event's page (PLAN.md §9 M13, EVENTS.md § API surface).
+ *
+ * **`run` is read from the route and passed through untouched**, because that is
+ * what an announcement's link carries. The page lives at the definition's slug —
+ * one stable address, so a link posted in Discord survives a retitle — and the
+ * occurrence has to be in the query or a mail about last Friday's invasion would
+ * open next Friday's.
+ *
+ * A run that belongs to some other event is **not** filtered here. The server
+ * ignores it and answers with this event anyway, which turns a stale link in a
+ * months-old mail into the page it was about rather than a dead end; second-
+ * guessing that would undo it.
+ */
+@HiltViewModel
+class EventViewModel @Inject constructor(
+    private val repository: EventsRepository,
+    savedStateHandle: SavedStateHandle,
+) : ViewModel() {
+
+    private val slug: String = savedStateHandle.get<String>(Routes.Args.SLUG).orEmpty()
+
+    /** Null unless the route carried one; never an empty string forwarded to the server. */
+    private val run: String? = savedStateHandle.get<String>(Routes.Args.RUN)?.takeIf { it.isNotBlank() }
+
+    private val _state = MutableStateFlow<UiState<PublicEventDto>>(UiState.Loading)
+    val state: StateFlow<UiState<PublicEventDto>> = _state.asStateFlow()
+
+    init {
+        load()
+    }
+
+    fun load() {
+        _state.value = UiState.Loading
+        viewModelScope.launch {
+            _state.value = repository.event(slug, run).toUiState()
+        }
+    }
+}

app/src/main/java/com/runicgateway/app/ui/events/EventsScreen.kt

@@ -0,0 +1,191 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.ui.events
+
+import androidx.compose.foundation.clickable
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.lazy.LazyColumn
+import androidx.compose.foundation.lazy.items
+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.text.font.FontStyle
+import androidx.compose.ui.unit.dp
+import androidx.hilt.navigation.compose.hiltViewModel
+import androidx.lifecycle.compose.collectAsStateWithLifecycle
+import com.runicgateway.app.R
+import com.runicgateway.app.data.api.dto.EventCalendarEntryDto
+import com.runicgateway.app.ui.UiState
+import com.runicgateway.app.ui.components.EmptyView
+import com.runicgateway.app.ui.components.ErrorView
+import com.runicgateway.app.ui.components.LoadingView
+import com.runicgateway.app.ui.components.PillTone
+import com.runicgateway.app.ui.components.ShardCard
+import com.runicgateway.app.ui.components.StatusPill
+
+/**
+ * The public event calendar (EVENTS.md §I, M13).
+ *
+ * **A list, not a month grid**, which is the same call the web client makes and
+ * for the same reason: an operator's question is "what does this month look
+ * like" — coverage, clashes, the gap on the third weekend — and a grid answers
+ * it. A visitor's question is "what is on, and when is the next one", which a
+ * chronological list answers in one glance and a grid answers by making them
+ * count squares. On a phone the grid is not even a close second.
+ *
+ * **A projection is drawn differently from a run**, one tier along from the
+ * operator's own reason for the distinction: past the materialisation horizon
+ * there is no row, nothing is committed to, and nothing can be cancelled. Drawing
+ * a forecast identically to a booking would be the screen promising something the
+ * server has not.
+ */
+@Composable
+fun EventsScreen(
+    onOpenEvent: (String) -> Unit,
+    modifier: Modifier = Modifier,
+    viewModel: EventsViewModel = 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 -> {
+            val entries = s.data.entries
+            if (entries.isEmpty()) {
+                EmptyView(stringResource(R.string.events_empty), modifier)
+            } else {
+                Calendar(entries, s.data.truncated, onOpenEvent, modifier)
+            }
+        }
+    }
+}
+
+/**
+ * Group by the READER's day, preserving the server's order rather than re-sorting.
+ *
+ * Internal + pure so the grouping — and the fact that it never reorders — is
+ * unit-tested without Compose.
+ */
+internal fun groupByReaderDay(entries: List<EventCalendarEntryDto>): List<CalendarDayGroup> {
+    val days = mutableListOf<CalendarDayGroup>()
+    for (entry in entries) {
+        val label = readerDayLabel(entry.scheduledFor)
+        val last = days.lastOrNull()
+        if (last != null && last.label == label) {
+            last.entries.add(entry)
+        } else {
+            days.add(CalendarDayGroup(label, mutableListOf(entry)))
+        }
+    }
+    return days
+}
+
+/** A mutable builder shape for [groupByReaderDay]; the screen only reads it. */
+internal data class CalendarDayGroup(
+    val label: String,
+    val entries: MutableList<EventCalendarEntryDto>,
+)
+
+@Composable
+private fun Calendar(
+    entries: List<EventCalendarEntryDto>,
+    truncated: Boolean,
+    onOpenEvent: (String) -> Unit,
+    modifier: Modifier = Modifier,
+) {
+    val days = groupByReaderDay(entries)
+    LazyColumn(
+        modifier = modifier.fillMaxSize(),
+        contentPadding = androidx.compose.foundation.layout.PaddingValues(16.dp),
+        verticalArrangement = Arrangement.spacedBy(16.dp),
+    ) {
+        days.forEach { day ->
+            item(key = "day-${day.label}") {
+                Text(
+                    text = day.label,
+                    style = MaterialTheme.typography.labelLarge,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                )
+            }
+            items(
+                items = day.entries,
+                key = { "${it.slug}-${it.scheduledFor}-${it.kind}" },
+            ) { entry ->
+                EntryCard(entry, onOpenEvent)
+            }
+        }
+        if (truncated) {
+            item(key = "truncated") {
+                Text(
+                    text = stringResource(R.string.events_truncated),
+                    style = MaterialTheme.typography.bodySmall,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                )
+            }
+        }
+    }
+}
+
+@Composable
+private fun EntryCard(entry: EventCalendarEntryDto, onOpenEvent: (String) -> Unit) {
+    ShardCard(
+        modifier = Modifier
+            .fillMaxWidth()
+            // A projection has a page too — the definition's — so it opens like any
+            // other entry. What it does not have is an occurrence to link to.
+            .clickable { onOpenEvent(entry.slug) },
+    ) {
+        Column(Modifier.padding(16.dp), verticalArrangement = Arrangement.spacedBy(6.dp)) {
+            Row(
+                Modifier.fillMaxWidth(),
+                horizontalArrangement = Arrangement.spacedBy(12.dp),
+                verticalAlignment = Alignment.CenterVertically,
+            ) {
+                Text(
+                    text = entry.title,
+                    style = MaterialTheme.typography.titleMedium,
+                    color = MaterialTheme.colorScheme.onSurface,
+                    modifier = Modifier.weight(1f),
+                )
+                StatusPill(
+                    text = stringResource(statusWordRes(entry.status, entry.scheduledFor)),
+                    tone = if (entry.live) PillTone.Success else PillTone.Neutral,
+                )
+            }
+            Text(
+                text = eventTime(entry.scheduledFor, entry.timezone),
+                style = MaterialTheme.typography.bodyMedium,
+                color = MaterialTheme.colorScheme.onSurfaceVariant,
+            )
+            entry.seriesName?.takeIf { it.isNotBlank() }?.let { series ->
+                Text(
+                    text = series,
+                    style = MaterialTheme.typography.bodySmall,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                )
+            }
+            if (entry.isProjected) {
+                // Said in words rather than drawn as a dashed border, because a
+                // phone reader skimming a list will not decode a border and the
+                // distinction is worth more than the pixel it would cost.
+                Text(
+                    text = stringResource(R.string.events_projected),
+                    style = MaterialTheme.typography.bodySmall,
+                    fontStyle = FontStyle.Italic,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                )
+            }
+        }
+    }
+}

app/src/main/java/com/runicgateway/app/ui/events/EventsViewModel.kt

@@ -0,0 +1,51 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.ui.events
+
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.viewModelScope
+import com.runicgateway.app.data.api.dto.EventCalendarDto
+import com.runicgateway.app.data.repository.EventsRepository
+import com.runicgateway.app.ui.UiState
+import com.runicgateway.app.ui.toUiState
+import dagger.hilt.android.lifecycle.HiltViewModel
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.StateFlow
+import kotlinx.coroutines.flow.asStateFlow
+import kotlinx.coroutines.launch
+import javax.inject.Inject
+
+/**
+ * The public event calendar (PLAN.md §9 M13, EVENTS.md §I).
+ *
+ * **No window is asked for**, and that is the whole of this view model's design.
+ * The server's default is now through 31 days out, so a client that computed a
+ * window before it could ask anything would make every deep link carry two ISO
+ * instants and would have to agree with the server about what "now" is. The
+ * window bound and the entry cap are the server's defence on the one surface with
+ * no login in front of it; there is nothing for the app to add.
+ *
+ * `toUiState`, not `toShardUiState`: these are CORE routes. A 404 here means the
+ * backend has no events at all, not that an admin switched a shard surface off,
+ * and offering "not published here" for it would name the wrong cause.
+ */
+@HiltViewModel
+class EventsViewModel @Inject constructor(
+    private val repository: EventsRepository,
+) : ViewModel() {
+
+    private val _state = MutableStateFlow<UiState<EventCalendarDto>>(UiState.Loading)
+    val state: StateFlow<UiState<EventCalendarDto>> = _state.asStateFlow()
+
+    init {
+        load()
+    }
+
+    fun load() {
+        _state.value = UiState.Loading
+        viewModelScope.launch {
+            _state.value = repository.calendar().toUiState()
+        }
+    }
+}

app/src/main/java/com/runicgateway/app/ui/events/MyEventsScreen.kt

@@ -0,0 +1,142 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.ui.events
+
+import androidx.compose.foundation.clickable
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.PaddingValues
+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.material3.MaterialTheme
+import androidx.compose.material3.Text
+import androidx.compose.material3.TextButton
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.getValue
+import androidx.compose.ui.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 androidx.hilt.navigation.compose.hiltViewModel
+import androidx.lifecycle.compose.collectAsStateWithLifecycle
+import com.runicgateway.app.R
+import com.runicgateway.app.data.api.dto.EventHistoryEntryDto
+import com.runicgateway.app.ui.UiState
+import com.runicgateway.app.ui.components.EmptyView
+import com.runicgateway.app.ui.components.ErrorView
+import com.runicgateway.app.ui.components.LoadingView
+import com.runicgateway.app.ui.components.ShardCard
+
+/**
+ * This account's event participation (EVENTS.md §J, M13).
+ *
+ * **The screen's one real design decision is what an unranked row says.** A run
+ * whose participants were collected but whose results have not been published has
+ * a score and no rank, and that is a real state rather than an error — it is the
+ * same state the admin run console has shown since events Phase 10. Rendering a
+ * dash with nothing explaining it would read as a bug; the row says the results
+ * are not published, which is a fact about the event rather than about the reader.
+ *
+ * Reached by **one drawer row for every signed-in account**, players and staff
+ * alike. The website mounts this twice only because its `RequirePlayer` guard sits
+ * over `/account` and the route behind it is role-agnostic; the app has no such
+ * wall, so it needs no second mount.
+ */
+@Composable
+fun MyEventsScreen(
+    onOpenRun: (String, Long) -> Unit,
+    modifier: Modifier = Modifier,
+    viewModel: MyEventsViewModel = hiltViewModel(),
+) {
+    val state by viewModel.state.collectAsStateWithLifecycle()
+
+    when (val items = state.items) {
+        is UiState.Loading -> LoadingView(modifier)
+        is UiState.Error -> ErrorView(items.kind, onRetry = viewModel::load, modifier = modifier)
+        is UiState.Success -> if (items.data.isEmpty()) {
+            EmptyView(stringResource(R.string.events_history_empty), modifier)
+        } else {
+            androidx.compose.foundation.lazy.LazyColumn(
+                modifier = modifier.fillMaxSize(),
+                contentPadding = PaddingValues(16.dp),
+                verticalArrangement = Arrangement.spacedBy(12.dp),
+            ) {
+                items(items.data.size, key = { items.data[it].id }) { index ->
+                    HistoryRow(items.data[index], onOpenRun)
+                }
+                if (state.hasMore) {
+                    item(key = "more") {
+                        TextButton(
+                            onClick = viewModel::loadMore,
+                            enabled = !state.loadingMore,
+                            modifier = Modifier.fillMaxWidth(),
+                        ) {
+                            Text(
+                                stringResource(
+                                    if (state.loadingMore) R.string.events_loading
+                                    else R.string.events_show_more,
+                                ),
+                            )
+                        }
+                    }
+                }
+            }
+        }
+    }
+}
+
+@Composable
+private fun HistoryRow(entry: EventHistoryEntryDto, onOpenRun: (String, Long) -> Unit) {
+    ShardCard(
+        modifier = Modifier
+            .fillMaxWidth()
+            // Straight to the occurrence the reader took part in, not to whatever
+            // is next: `?run=` is what makes the event page answer about this one.
+            .clickable { onOpenRun(entry.slug, entry.runId) },
+    ) {
+        Row(
+            Modifier.fillMaxWidth().padding(16.dp),
+            horizontalArrangement = Arrangement.spacedBy(12.dp),
+            verticalAlignment = Alignment.CenterVertically,
+        ) {
+            Column(Modifier.weight(1f), verticalArrangement = Arrangement.spacedBy(4.dp)) {
+                Text(
+                    text = entry.title,
+                    style = MaterialTheme.typography.titleMedium,
+                    color = MaterialTheme.colorScheme.onSurface,
+                )
+                Text(
+                    text = eventDateTime(entry.scheduledFor, entry.timezone),
+                    style = MaterialTheme.typography.bodySmall,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                )
+                entry.seriesName?.takeIf { it.isNotBlank() }?.let {
+                    Text(
+                        text = it,
+                        style = MaterialTheme.typography.bodySmall,
+                        color = MaterialTheme.colorScheme.onSurfaceVariant,
+                    )
+                }
+            }
+            Column(horizontalAlignment = Alignment.End) {
+                Text(
+                    text = entry.rank
+                        ?.let { stringResource(R.string.events_rank, it) }
+                        ?: stringResource(R.string.events_results_unpublished),
+                    style = MaterialTheme.typography.bodyMedium,
+                    color = MaterialTheme.colorScheme.onSurface,
+                    textAlign = TextAlign.End,
+                )
+                Text(
+                    text = stringResource(R.string.events_score, scoreText(entry.score)),
+                    style = MaterialTheme.typography.bodySmall,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                )
+            }
+        }
+    }
+}

app/src/main/java/com/runicgateway/app/ui/events/MyEventsViewModel.kt

@@ -0,0 +1,117 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.ui.events
+
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.viewModelScope
+import com.runicgateway.app.core.auth.Session
+import com.runicgateway.app.core.auth.SessionManager
+import com.runicgateway.app.core.result.ApiResult
+import com.runicgateway.app.data.api.dto.EventHistoryEntryDto
+import com.runicgateway.app.data.repository.EventsRepository
+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.distinctUntilChanged
+import kotlinx.coroutines.flow.map
+import kotlinx.coroutines.launch
+import javax.inject.Inject
+
+/**
+ * This account's event participation (PLAN.md §9 M13, EVENTS.md §J).
+ *
+ * **Self-scoped by the session and nothing else.** There is no id parameter on
+ * the route and deliberately none here: one account never reads another's, and
+ * there is no argument that could later grow into one.
+ *
+ * **Keyset-paged on the participation row's own id, never an offset** — the list
+ * gains a row every time the reader attends something, so an offset page would
+ * skip and repeat rows around the seam.
+ *
+ * ## Why this watches the session, when no other screen here does
+ *
+ * **A drawer route's view model outlives a sign-out.** `navigateTopLevel` saves
+ * and restores back-stack state, so the `NavBackStackEntry` for this route keeps
+ * its `ViewModelStore` across a sign-out and a sign-in as somebody else — and a
+ * view model that loads only in `init` never runs again. The live walk found the
+ * consequence: signing out of an admin account and back in as a player showed the
+ * PLAYER the admin's participation history, with no request made at all.
+ *
+ * The public event screens have the same lifetime and do not care, because a
+ * calendar is the same for everybody. This one is per-account, so the account is
+ * what it keys on: the flow emits the current session immediately, which is also
+ * the first load, and re-emits only when the signed-in id actually changes — a
+ * resume revalidation returning the same user does not refetch.
+ */
+@HiltViewModel
+class MyEventsViewModel @Inject constructor(
+    private val repository: EventsRepository,
+    sessionManager: SessionManager,
+) : ViewModel() {
+
+    data class State(
+        val items: UiState<List<EventHistoryEntryDto>> = UiState.Loading,
+        val hasMore: Boolean = false,
+        val loadingMore: Boolean = false,
+    )
+
+    private val _state = MutableStateFlow(State())
+    val state: StateFlow<State> = _state.asStateFlow()
+
+    init {
+        viewModelScope.launch {
+            sessionManager.state
+                .map { (it as? Session.SignedIn)?.user?.id }
+                .distinctUntilChanged()
+                .collect { userId ->
+                    // Signed out: drop the rows rather than leave the last
+                    // account's on screen behind a shell that is about to
+                    // navigate away.
+                    if (userId == null) _state.value = State(items = UiState.Success(emptyList()))
+                    else load()
+                }
+        }
+    }
+
+    fun load() {
+        _state.value = State()
+        viewModelScope.launch {
+            val result = repository.history(PAGE)
+            _state.value = State(
+                items = result.toUiState(),
+                // A full page means there is probably another; a short one is the
+                // end. One request rather than a count the server does not send.
+                hasMore = (result as? ApiResult.Ok)?.data?.size == PAGE,
+            )
+        }
+    }
+
+    fun loadMore() {
+        val current = _state.value
+        val shown = (current.items as? UiState.Success)?.data ?: return
+        val last = shown.lastOrNull() ?: return
+        if (current.loadingMore || !current.hasMore) return
+
+        _state.value = current.copy(loadingMore = true)
+        viewModelScope.launch {
+            when (val result = repository.history(PAGE, before = last.id)) {
+                is ApiResult.Ok -> _state.value = State(
+                    items = UiState.Success(shown + result.data),
+                    hasMore = result.data.size == PAGE,
+                )
+                // A failed NEXT page keeps the pages already read rather than
+                // replacing a screenful of history with an error: the reader can
+                // still see what loaded, and tapping again retries.
+                else -> _state.value = current.copy(loadingMore = false)
+            }
+        }
+    }
+
+    private companion object {
+        const val PAGE = 25
+    }
+}

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

@@ -6,9 +6,12 @@ package com.runicgateway.app.ui.navigation
 import androidx.annotation.StringRes
 import com.runicgateway.app.R
 import com.runicgateway.app.core.auth.Session
+import com.runicgateway.app.data.repository.Capability
 import com.runicgateway.app.data.repository.ShardFeature
 import com.runicgateway.app.data.repository.ShardFeatures
+import com.runicgateway.app.data.repository.SiteCapabilities
 import com.runicgateway.app.data.repository.canSee
+import com.runicgateway.app.data.repository.canUse
 
 /**
  * One shared, declarative, access-level navigation definition (PLAN.md §5): a
@@ -52,6 +55,20 @@ data class MenuEntry(
      * isn't shard-derived and only [access] applies.
      */
     val feature: String? = null,
+    /**
+     * The backend capability this row needs, or null when it needs none (M13).
+     *
+     * **A different question from [feature], which is why it is a second field
+     * and not a wider one.** This asks whether the code behind the row is
+     * *installed at all* — a per-HOST fact, from `GET /public/modules` and core's
+     * own list — while [feature] asks whether this shard publishes that surface
+     * to *this viewer*, which is per-viewer and admin-configurable. A site with no
+     * game module has no `shard` capability and no shard rows, whoever is looking;
+     * a site with one may still hide its market from anonymous visitors.
+     *
+     * The two also fail differently, and [canUse] is where that lives.
+     */
+    val capability: String? = null,
     /**
      * An admin's own label for this row, from the shard's `nav_public` override
      * (THEMING_AND_NAV.md §6). Null — always, as coded — means [labelRes] stands.
@@ -71,21 +88,95 @@ data class MenuEntry(
 val APP_MENU: List<MenuEntry> = listOf(
     MenuEntry(Routes.HOME, R.string.menu_home),
     MenuEntry(Routes.NEWS, R.string.menu_news),
+    // Events are CORE's, so this row is gated on core's own capability rather than
+    // a module's: a site with no game module still has a calendar. Placed here to
+    // match the website's own nav, where Events is the row after News.
+    MenuEntry(Routes.EVENTS, R.string.menu_events, capability = Capability.EVENTS),
     MenuEntry(Routes.WIKI, R.string.menu_wiki),
-    MenuEntry(Routes.SHARD, R.string.menu_shard, feature = ShardFeature.STATUS),
+    // The shard group. Every row needs the game module INSTALLED (one capability,
+    // because that is the only question a capability can answer) and its own
+    // feature published to this viewer (M11) — both, independently.
+    MenuEntry(
+        Routes.SHARD,
+        R.string.menu_shard,
+        feature = ShardFeature.STATUS,
+        capability = Capability.SHARD,
+    ),
     // Protocol 3.0 shard content (M11). Each hides when the shard doesn't publish it,
     // which for a brand-new install is every one of them until the plugin has swept.
-    MenuEntry(Routes.SHARD_RULES, R.string.menu_rules, feature = ShardFeature.RULESET),
-    MenuEntry(Routes.ATLAS, R.string.menu_atlas, feature = ShardFeature.ATLAS),
-    MenuEntry(Routes.SHARD_LEADERBOARDS, R.string.menu_leaderboards, feature = ShardFeature.LEADERBOARDS),
-    MenuEntry(Routes.SHARD_MARKET, R.string.menu_market, feature = ShardFeature.MARKET),
+    MenuEntry(
+        Routes.SHARD_RULES,
+        R.string.menu_rules,
+        feature = ShardFeature.RULESET,
+        capability = Capability.SHARD,
+    ),
+    MenuEntry(
+        Routes.ATLAS,
+        R.string.menu_atlas,
+        feature = ShardFeature.ATLAS,
+        capability = Capability.SHARD,
+    ),
+    MenuEntry(
+        Routes.SHARD_LEADERBOARDS,
+        R.string.menu_leaderboards,
+        feature = ShardFeature.LEADERBOARDS,
+        capability = Capability.SHARD,
+    ),
+    MenuEntry(
+        Routes.SHARD_MARKET,
+        R.string.menu_market,
+        feature = ShardFeature.MARKET,
+        capability = Capability.SHARD,
+    ),
+    // The Rust module (M14). ONE row, because the module's whole public surface is
+    // one list and one page beneath it — `/rust` IS the server list, not a hub
+    // above one.
+    //
+    // **No `feature`, and that is not an omission.** The visibility framework is
+    // `module-uo`'s own (`shardVisibility`, six files under `module-uo/server/`
+    // and none under core's), and §2.7 forbids a module importing another's — so
+    // `module-rust` has no per-viewer visibility layer yet. Its phase 14 builds
+    // one; until then these routes are public to everyone the site is public to,
+    // and a `feature` here would be gating on a flag nothing publishes.
+    MenuEntry(Routes.RUST, R.string.menu_rust, capability = Capability.RUST),
     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),
+    // Participation history: SIGNED_IN, not PLAYER. The route is `requireAuth`
+    // alone and self-scoped on the caller's own id, and the website needed two
+    // mounts for it only because `RequirePlayer` guards `/account` there. Staff
+    // attend events too, and event history is not game-linked data.
+    MenuEntry(
+        Routes.MY_EVENTS,
+        R.string.menu_my_events,
+        MenuAccess.SIGNED_IN,
+        capability = Capability.EVENTS,
+    ),
+    // These three read `/player/shard/*`, which is the SAME module's player mount —
+    // so they need the capability for the same reason the public rows do. They
+    // carry no `feature`, because the visibility framework covers the public
+    // surfaces and these are self-service, gated by role and ownership instead.
+    // That asymmetry is exactly why the live walk found them and the suite did
+    // not: "a shard row" had been defined as "a row with a feature".
+    MenuEntry(
+        Routes.PLAYER_CHARACTERS,
+        R.string.menu_my_characters,
+        MenuAccess.PLAYER,
+        capability = Capability.SHARD,
+    ),
+    MenuEntry(
+        Routes.PLAYER_VENDORS,
+        R.string.menu_my_vendors,
+        MenuAccess.PLAYER,
+        capability = Capability.SHARD,
+    ),
+    MenuEntry(
+        Routes.PLAYER_HOUSES,
+        R.string.menu_my_houses,
+        MenuAccess.PLAYER,
+        capability = Capability.SHARD,
+    ),
     // Staff operations (§1, M10) — revealed for staff roles; the backend re-checks every call.
     MenuEntry(Routes.ADMIN_DASHBOARD, R.string.menu_admin_dashboard, MenuAccess.STAFF),
     MenuEntry(Routes.ADMIN_CONTENT, R.string.menu_admin_content, MenuAccess.STAFF),
@@ -94,24 +185,33 @@ val APP_MENU: List<MenuEntry> = listOf(
 )
 
 /**
- * The entries the given [session] may see, given the shard [features] it may reach.
- * Pure + side-effect-free so the gating is unit-tested without Compose.
+ * The entries the given [session] may see, on a backend with these [capabilities]
+ * and this shard's [features]. Pure + side-effect-free so the gating is unit-tested
+ * without Compose.
  *
- * Two independent filters, and both must pass:
+ * Three independent filters, and all three must pass:
  *
  *  - [MenuEntry.access] against the session — who the caller is.
+ *  - [MenuEntry.capability] against what this backend serves — whether the code
+ *    behind the row is installed at all (M13). Per host.
  *  - [MenuEntry.feature] against the shard's live visibility config — what this shard
- *    publishes at all (M11). `null` [features] means the answer isn't known yet and
- *    every shard entry shows; see [canSee] for why that direction is deliberate.
+ *    publishes to this viewer (M11). Per viewer.
+ *
+ * **The last two both fail open on an unknown answer, but "unknown" means
+ * different things to them.** A `null` [features] is unknown; so is a `null`
+ * [capabilities] — but a *non-null* [capabilities] that does not name the string
+ * is an ANSWER, and it hides. Without that, a site with no game module renders
+ * five shard rows that each 404. See [canUse].
  */
 fun visibleEntries(
     entries: List<MenuEntry>,
     session: Session,
     features: ShardFeatures? = null,
-): List<MenuEntry> = entries.filter { isEntryVisible(it, session, features) }
+    capabilities: SiteCapabilities? = null,
+): List<MenuEntry> = entries.filter { isEntryVisible(it, session, features, capabilities) }
 
 /**
- * [visibleEntries] for a single entry — the same two filters, and the same
+ * [visibleEntries] for a single entry — the same three filters, and the same
  * boundary. Split out because the drawer is a tree once an admin groups rows into
  * sections (§6.3): [pruneNav] applies this predicate inside a section as well, and
  * both callers must ask exactly one question or a sectioned row could be gated by
@@ -121,6 +221,7 @@ fun isEntryVisible(
     entry: MenuEntry,
     session: Session,
     features: ShardFeatures? = null,
+    capabilities: SiteCapabilities? = null,
 ): Boolean {
     val allowedByRole = when (entry.access) {
         MenuAccess.PUBLIC -> true
@@ -129,5 +230,7 @@ fun isEntryVisible(
         MenuAccess.STAFF -> session is Session.SignedIn && session.user.isStaff
         MenuAccess.MODERATOR -> session is Session.SignedIn && session.user.isModerator
     }
-    return allowedByRole && (entry.feature == null || canSee(features, entry.feature))
+    return allowedByRole &&
+        canUse(capabilities, entry.capability) &&
+        (entry.feature == null || canSee(features, entry.feature))
 }

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

@@ -11,34 +11,77 @@ import com.runicgateway.app.data.repository.ContentRepository.PostCategory
  * The public nav an admin edits is keyed by **website** paths, so honoring it in
  * the app needs a translation. This is the one new piece of cross-repo coupling
  * the milestone introduces, which is why it lives in a single file with the
- * website's own array quoted right beside it — the coupling is visible and
+ * website's own arrays quoted right beside it — the coupling is visible and
  * reviewable in one place rather than spread across the drawer's call sites.
  *
+ * ## The nav is TWO arrays now, and that is what M13 had to correct
+ *
+ * This file was written when the website's public nav was one sixteen-row array.
+ * Since the module-system cutover on 2026-08-12 it is **core's eight rows plus
+ * every installed module's**, interleaved at render time by `withModuleNav`, and
+ * a module's pages are mounted by core at `/<module id>/<path>` — so the nine
+ * shard rows moved from `/site/champs` to `/uo/champs` and this table stopped
+ * resolving any of them. Three things followed, all of them true of the shipped
+ * app until M13: a nav override on a shard row was ignored, an added link to a
+ * shard page handed off to a browser instead of opening natively, and the sort
+ * key line below was a sixteen-row line against a nav numbered differently.
+ *
+ * **The nine `/uo/` paths are hardcoded, and they are ONE module's.** The alternative
+ * — reading the installed module's id from `GET /public/modules` and building
+ * `/<id>/shard` — is forbidden by `MODULE_API.md` §2.9 (*"a client must not infer
+ * a route from a capability"*) and would hardcode the same path shape less
+ * visibly. A site running a different game module matches none of these nine, its
+ * links hand off to a Custom Tab, and that is the correct answer rather than a
+ * gap: core cannot tell the app what another module calls its pages.
+ *
  * Verbatim from `website/client/src/components/SiteHeader.jsx`, which is the
- * exported owner of the list (`export const NAV`, and Admin → Navigation edits
+ * exported owner of core's list (`export const NAV`, and Admin → Navigation edits
  * exactly it):
  *
  * ```js
  * export const NAV = [
  *   { label: 'Home', to: '/', end: true },
  *   { label: 'News', to: '/site/news' },
+ *   { label: 'Events', to: '/site/events' },
  *   { label: 'Screenshots', to: '/site/screenshots' },
  *   { label: 'Five on Friday', to: '/site/five-on-friday' },
  *   { label: 'Newsletter', to: '/site/newsletter' },
  *   { label: 'Wiki', to: '/wiki' },
- *   { label: 'Shard', to: '/site/shard', feature: 'status' },
- *   { label: 'Champions', to: '/site/champs', feature: 'champs' },
- *   { label: 'Guilds', to: '/site/guilds', feature: 'guilds' },
- *   { label: 'Governors', to: '/site/governors', feature: 'governors' },
- *   { label: 'Houses', to: '/site/houses', feature: 'houses' },
- *   { label: 'Rules', to: '/site/rules', feature: 'ruleset' },
- *   { label: 'Atlas', to: '/site/atlas', feature: 'atlas' },
- *   { label: 'Leaderboards', to: '/site/leaderboards', feature: 'leaderboards' },
- *   { label: 'Market', to: '/site/market', feature: 'market' },
  *   { label: 'About', to: '/site/about' },
  * ]
  * ```
  *
+ * and from `module-uo/client/src/entry.jsx`, which registers the rest:
+ *
+ * ```jsx
+ * registry.registerNav(ID, {
+ *   area: 'public',
+ *   items: [
+ *     { label: 'Shard',        to: '/uo/shard',        feature: 'status' },
+ *     { label: 'Champions',    to: '/uo/champs',       feature: 'champs' },
+ *     { label: 'Guilds',       to: '/uo/guilds',       feature: 'guilds' },
+ *     { label: 'Governors',    to: '/uo/governors',    feature: 'governors' },
+ *     { label: 'Houses',       to: '/uo/houses',       feature: 'houses' },
+ *     { label: 'Rules',        to: '/uo/rules',        feature: 'ruleset' },
+ *     { label: 'Atlas',        to: '/uo/atlas',        feature: 'atlas' },
+ *     { label: 'Leaderboards', to: '/uo/leaderboards', feature: 'leaderboards' },
+ *     { label: 'Market',       to: '/uo/market',       feature: 'market' },
+ *   ],
+ * })
+ * ```
+ *
+ * and from `module-rust/client/src/entry.jsx`, which registers one (M14):
+ *
+ * ```jsx
+ * registry.registerNav(ID, {
+ *   area: 'public',
+ *   items: [{ label: 'Servers', to: '/rust' }],
+ * })
+ * ```
+ *
+ * None of those nine declares an `order`, so `mergeFlat` appends them after core's
+ * rows in registration order — which is the order they are listed in below.
+ *
  * The `feature` values are **not** mirrored here on purpose. [APP_MENU] is the
  * app's own source of truth for gating, and a second copy of a security-relevant
  * value that drifts silently is worth more than it costs. This table carries the
@@ -58,27 +101,43 @@ data class WebNavPath(val path: String, val route: String)
  * *this* list (the admin's editor writes the position a row holds on the web), so
  * a row the admin never moved has to take its key from the same number line or
  * explicit and implicit keys would be incomparable. See `NavOverrides.kt`.
+ *
+ * Core's eight first, then the module's nine, because that is what `withModuleNav`
+ * renders and therefore what the admin's editor numbered.
  */
 val WEBSITE_PUBLIC_NAV: List<WebNavPath> = listOf(
     WebNavPath("/", Routes.HOME),
     WebNavPath("/site/news", Routes.NEWS),
+    WebNavPath("/site/events", Routes.EVENTS),
     // The app's News screen carries all four categories as tabs, so these three
     // have a route but no drawer row of their own — see the note below.
     WebNavPath("/site/screenshots", Routes.news(PostCategory.SCREENSHOTS)),
     WebNavPath("/site/five-on-friday", Routes.news(PostCategory.FIVE_ON_FRIDAY)),
     WebNavPath("/site/newsletter", Routes.news(PostCategory.NEWSLETTER)),
     WebNavPath("/wiki", Routes.WIKI),
-    WebNavPath("/site/shard", Routes.SHARD),
-    // Behind the Shard hub in the app, deliberately — no drawer row either.
-    WebNavPath("/site/champs", Routes.SHARD_CHAMPS),
-    WebNavPath("/site/guilds", Routes.SHARD_GUILDS),
-    WebNavPath("/site/governors", Routes.SHARD_GOVERNORS),
-    WebNavPath("/site/houses", Routes.SHARD_HOUSES),
-    WebNavPath("/site/rules", Routes.SHARD_RULES),
-    WebNavPath("/site/atlas", Routes.ATLAS),
-    WebNavPath("/site/leaderboards", Routes.SHARD_LEADERBOARDS),
-    WebNavPath("/site/market", Routes.SHARD_MARKET),
     WebNavPath("/site/about", Routes.page("about")),
+    // module-uo's rows. Mounted by core at `/<module id>/<path>`, which is why
+    // every one of these is `/uo/` and not `/site/`.
+    WebNavPath("/uo/shard", Routes.SHARD),
+    // Behind the Shard hub in the app, deliberately — no drawer row either.
+    WebNavPath("/uo/champs", Routes.SHARD_CHAMPS),
+    WebNavPath("/uo/guilds", Routes.SHARD_GUILDS),
+    WebNavPath("/uo/governors", Routes.SHARD_GOVERNORS),
+    WebNavPath("/uo/houses", Routes.SHARD_HOUSES),
+    WebNavPath("/uo/rules", Routes.SHARD_RULES),
+    WebNavPath("/uo/atlas", Routes.ATLAS),
+    WebNavPath("/uo/leaderboards", Routes.SHARD_LEADERBOARDS),
+    WebNavPath("/uo/market", Routes.SHARD_MARKET),
+    // module-rust's one row (M14). It registers `{ label: 'Servers', to: '/rust' }`
+    // and nothing else — `/rust` IS the server list, because core strips the
+    // trailing separator from a module route registered with `path: ''`.
+    //
+    // **Both modules can be installed on one backend**, and then the nav is core's
+    // eight plus ten. This table is a superset by design: a path here for a module
+    // an operator has NOT installed never appears in that backend's nav and so is
+    // never looked up, while a path missing from it makes a link that exists hand
+    // off to a browser.
+    WebNavPath("/rust", Routes.RUST),
 )
 
 /**
@@ -134,6 +193,16 @@ private fun normalizeWebPath(path: String?): String? {
  */
 private val RESERVED_TOP_LEVEL = setOf(
     "admin", "account", "player", "site", "wiki", "invite", "preview", "api", "uploads",
+    // An installed module's pages are mounted at `/<id>/…` and are not CMS pages.
+    // Only ids the app knows about need listing: an unknown module's `/<id>` would
+    // resolve to a CMS page that 404s, which is the same answer the browser gives
+    // it, and core cannot enumerate them for us here anyway.
+    //
+    // `rust` is here for the opposite reason to the rest: `/rust` DOES resolve, to
+    // the server list, and it does so through the nav table above — this set only
+    // stops the CMS-page fallback claiming it. Without the entry a site with the
+    // module absent would open a page-not-found screen instead of the browser.
+    "uo", "rust",
 )
 
 /**
@@ -153,16 +222,18 @@ private val RESERVED_TOP_LEVEL = setOf(
  * <Route path="/site/five-on-friday" element={<FiveOnFriday />} />
  * <Route path="/site/newsletter" element={<Newsletter />} />
  * <Route path="/site/newsletter/:id" element={<NewsletterIssue />} />
+ * <Route path="/site/events" element={<Events />} />
+ * <Route path="/site/events/series/:slug" element={<EventSeries />} />
+ * <Route path="/site/events/:slug" element={<EventPage />} />
  * <Route path="/site/about" element={<About />} />
  * <Route path="/site/status" element={<Status />} />
- * <Route path="/site/shard" element={<Shard />} />
- * <Route path="/site/shard/activity" element={<ShardActivity />} />
- * ... /site/champs, /guilds, /governors, /houses, /rules, /leaderboards, /market
- * <Route path="/site/atlas" element={<Atlas />} />
- * <Route path="/site/atlas/:slug" element={<AtlasCreature />} />
- * <Route path="/site/market/vendors/:serial" element={<MarketVendor />} />
  * <Route path="/wiki" element={<Wiki />} />
  * <Route path="/wiki/:slug" element={<WikiArticle />} />
+ * // Installed modules' pages, mounted at `/<module id>/<path>`:
+ * //   /uo/shard, /uo/shard/activity, /uo/champs, /uo/guilds, /uo/guilds/:id,
+ * //   /uo/governors, /uo/houses, /uo/rules, /uo/leaderboards, /uo/market,
+ * //   /uo/market/vendors/:serial, /uo/atlas, /uo/atlas/:slug
+ * //   /rust, /rust/servers/:id
  * // CMS pages: top-level /:slug, matched only after the named routes above
  * <Route path="/:slug" element={<CmsPage />} />
  * ```
@@ -177,19 +248,33 @@ private val RESERVED_TOP_LEVEL = setOf(
  * /site/{screenshots,five-on-friday,newsletter}
  *                                 → NEWS, that category's tab
  * /site/newsletter/<id>           → POST         (the site's one post-detail route)
+ * /site/events                    → EVENTS
+ * /site/events/series/<slug>      → EVENT_SERIES
+ * /site/events/<slug>[?run=<id>]  → EVENT        (the one route that takes a query)
  * /wiki                           → WIKI
  * /wiki/<slug>                    → WIKI_PAGE
- * /site/<shard surface>           → the mapped shard route (§6.2)
- * /site/atlas/<slug>              → ATLAS_CREATURE
- * /site/market/vendors/<serial>   → SHARD_MARKET_VENDOR
+ * /uo/<shard surface>             → the mapped shard route (§6.2)
+ * /uo/atlas/<slug>                → ATLAS_CREATURE
+ * /uo/market/vendors/<serial>     → SHARD_MARKET_VENDOR
+ * /rust                           → RUST         (module-rust's server list)
+ * /rust/servers/<id>              → RUST_SERVER
  * /site/about                     → PAGE("about")
  * /<slug>                         → PAGE(slug), unless <slug> is reserved
  * anything else                   → null, i.e. the Custom Tab
  * ```
  *
- * **A path carrying a query or a fragment hands off**, whatever its route part
- * says. No app route takes either, so a native match would quietly drop what the
- * admin wrote; the browser honors it exactly.
+ * **A path carrying a query or a fragment hands off — with exactly one
+ * exception.** The rule exists because no app route took either, so a native
+ * match would quietly drop what the admin wrote while the browser honors it. The
+ * event page (M13) is the first route that takes a query, and it takes one key:
+ * `run`, which is what every `event.` announcement's `eventUrl` carries. So a
+ * `?run=` on an event path resolves natively and **anything else in a query
+ * string, any second parameter, and any fragment still hand off** — the carve-out
+ * is one key on one path, not a general "parse the query".
+ *
+ * That narrowness is the point: an admin who writes `/site/events/x?utm=mail` gets
+ * the browser, which honors `utm`, rather than an app screen that silently ignored
+ * it.
  *
  * Resolving a path is not the same as being allowed to see the screen behind it.
  * A link to `/site/market` on a shard that does not publish the market lands on
@@ -197,24 +282,77 @@ private val RESERVED_TOP_LEVEL = setOf(
  * URL on the web does too (§6.3).
  */
 fun resolveWebPath(path: String?): String? {
-    val normalized = normalizeWebPath(path) ?: return null
-    if (normalized.any { it == '?' || it == '#' }) return null
-    WEB_PATH_TO_ROUTE[normalized]?.let { return it }
+    val raw = path?.trim().orEmpty()
+    // A fragment is never honored natively: no app route has one to put it in.
+    if (raw.isEmpty() || '#' in raw) return null
+
+    val queryAt = raw.indexOf('?')
+    val query = if (queryAt >= 0) raw.substring(queryAt + 1) else ""
+    val normalized = normalizeWebPath(if (queryAt >= 0) raw.substring(0, queryAt) else raw)
+        ?: return null
+
+    if (query.isEmpty()) WEB_PATH_TO_ROUTE[normalized]?.let { return it }
     if (!normalized.startsWith("/")) return null
 
     // Blank segments ("/site//news") mean a malformed path, not a slug.
     val segments = normalized.removePrefix("/").split('/')
     if (segments.any { it.isBlank() }) return null
 
+    // The one path that may carry a query, and the one key it may carry. Checked
+    // before the general "a query hands off" rule below, and nowhere else.
+    if (segments.size == 3 && segments[0] == "site" && segments[1] == "events" &&
+        segments[2] != "series"
+    ) {
+        // No query is the ordinary case — a link to the event rather than to one
+        // of its occurrences. A query is honored only when it is exactly the run.
+        if (query.isEmpty()) return Routes.event(segments[2])
+        val run = runParam(query) ?: return null
+        return Routes.event(segments[2], run)
+    }
+    if (query.isNotEmpty()) return null
+
     return when {
         segments.size == 1 -> segments[0].takeIf { it !in RESERVED_TOP_LEVEL }?.let(Routes::page)
         segments[0] == "wiki" && segments.size == 2 -> Routes.wikiPage(segments[1])
-        segments[0] != "site" -> null
-        segments.size == 3 && segments[1] == "newsletter" ->
+        segments[0] == "site" && segments.size == 3 && segments[1] == "newsletter" ->
             Routes.post(PostCategory.NEWSLETTER.urlSlug, segments[2])
-        segments.size == 3 && segments[1] == "atlas" -> Routes.atlasCreature(segments[2])
-        segments.size == 4 && segments[1] == "market" && segments[2] == "vendors" ->
-            Routes.marketVendor(segments[3])
+        segments[0] == "site" && segments.size == 4 && segments[1] == "events" &&
+            segments[2] == "series" -> Routes.eventSeries(segments[3])
+        segments[0] == MODULE_UO && segments.size == 3 && segments[1] == "atlas" ->
+            Routes.atlasCreature(segments[2])
+        segments[0] == MODULE_UO && segments.size == 4 && segments[1] == "market" &&
+            segments[2] == "vendors" -> Routes.marketVendor(segments[3])
+        // module-rust's one page below the list. `/rust` itself is already
+        // answered by the nav table above, before this fallback is reached.
+        segments[0] == MODULE_RUST && segments.size == 3 && segments[1] == "servers" ->
+            Routes.rustServer(segments[2])
         else -> null
     }
 }
+
+/**
+ * The `run` value of a query that consists of **exactly** `run=<something>`, or
+ * null for every other query — including one that merely contains a `run` among
+ * others.
+ *
+ * Deliberately not a query parser. A second parameter means the writer meant
+ * something the app cannot honor, and the honest answer to that is the browser.
+ * An empty value (`?run=`) is null too: it would reach the screen as a blank
+ * string and be forwarded to the server as one.
+ */
+private fun runParam(query: String): String? {
+    val value = query.removePrefix("run=")
+    if (value.length == query.length || value.isEmpty()) return null
+    return value.takeIf { '&' !in it && '=' !in it }
+}
+
+/**
+ * The module id whose public pages this table maps.
+ *
+ * Named once rather than spelled into four branches, so what is coupled to one
+ * module is countable. It is a literal on purpose — see the file header.
+ */
+private const val MODULE_UO = "uo"
+
+/** The second game module's id (M14). A literal for the same reason. */
+private const val MODULE_RUST = "rust"

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

@@ -37,8 +37,54 @@ object Routes {
     const val ACCOUNT_TRUSTED_DEVICES = "account/trusted-devices"
     const val ACCOUNT_RECOVERY_CODES = "account/recovery-codes"
 
-    /** Opt-in push notification settings (§11, signed-in). */
+    /**
+     * The in-app inbox (ENGAGEMENT.md phase 8, signed-in) and its settings.
+     *
+     * The bare route is the CONTENT and the named sub-route the preferences, which
+     * is exactly how the web surface is laid out (`/account/notifications` and
+     * `…/settings`) — and what a person means when they tap "Notifications".
+     */
     const val NOTIFICATIONS = "notifications"
+    const val NOTIFICATIONS_SETTINGS = "notifications/settings"
+
+    /**
+     * Events (§9 M13) — CORE's, not a module's: these screens exist on a backend
+     * with no game module at all, which is why they are not under `shard/`.
+     *
+     * **[EVENT_ROUTE] is the app's first route that takes a query**, and it takes
+     * exactly one: `run`, naming which occurrence a results table is about. The
+     * page lives at the definition's slug so a weekly event has one address that
+     * survives a retitle, and the occurrence has to live somewhere else. See
+     * [resolveWebPath], whose "a query hands off" rule this is the one exception
+     * to.
+     *
+     * **[MY_EVENTS] is `account/events` and not `events/mine`**, which is not
+     * cosmetic: `events/mine` and `events/{slug}` are both two segments, and a
+     * static-versus-argument race between two NavHost patterns is exactly the bug
+     * events Phase 13 shipped one tier along, where a static `events/new` outranked
+     * `events/:id` in React Router and made creating an event impossible for seven
+     * phases. Under `account/` there is no dynamic sibling and no race to lose.
+     */
+    const val EVENTS = "events"
+    const val EVENT_ROUTE = "events/{slug}?run={run}"
+    const val EVENT_SERIES = "events/series/{slug}"
+    const val MY_EVENTS = "account/events"
+
+    /**
+     * The Rust module's surface (§9 M14, `docs/modules/rust/PLAN.md` D12, D13).
+     *
+     * **[RUST] is the server list, not a hub above one.** The module registers its
+     * pages with `path: ''` and core strips the trailing separator, so `/rust` on
+     * the website *is* the list — there is no landing page between the drawer row
+     * and the servers, and adding one here would invent a screen the website does
+     * not have.
+     *
+     * **A different game, so a different route tree.** These are deliberately not
+     * folded into [SHARD]: one shard is a place, and a Rust site is a fleet. The
+     * two can be installed on the same backend, and then both trees exist at once.
+     */
+    const val RUST = "rust"
+    const val RUST_SERVER = "rust/servers/{serverId}"
 
     /** Public shard hub (§6.2). */
     const val SHARD = "shard"
@@ -90,6 +136,8 @@ object Routes {
         const val CATEGORY = "category"
         const val ID_OR_SLUG = "idOrSlug"
         const val SERIAL = "serial"
+        const val RUN = "run"
+        const val SERVER_ID = "serverId"
     }
 
     fun page(slug: String) = "page/$slug"
@@ -109,9 +157,60 @@ object Routes {
     /** One player vendor's shop, by in-game (hex) serial. */
     fun marketVendor(serial: String) = "shard/market/$serial"
 
+    /**
+     * One Rust server's page.
+     *
+     * The id is a slug an operator chose, so it is encoded: nothing stops one
+     * carrying a character a path would otherwise eat, and a server nobody can
+     * open is a worse failure than a name nobody can read.
+     *
+     * **Encoded here rather than with `android.net.Uri`**, which is a stub in a
+     * JVM unit test and throws "not mocked" — this object is pure and every test
+     * that builds a route would have to become an instrumented one to keep it
+     * that way.
+     */
+    fun rustServer(id: String) = "rust/servers/${encodePathSegment(id)}"
+
+    /**
+     * Percent-encode one path segment, allowing only the unreserved set.
+     *
+     * Deliberately stricter than it needs to be: encoding a character that did
+     * not need it still round-trips, where missing one that did produces a route
+     * NavHost matches differently from the one that was built. UTF-8 first, so a
+     * non-ASCII name is encoded per byte rather than per character.
+     */
+    private fun encodePathSegment(value: String): String = buildString {
+        for (byte in value.toByteArray(Charsets.UTF_8)) {
+            val code = byte.toInt() and 0xFF
+            val char = code.toChar()
+            if (code < 128 && (char.isLetterOrDigit() || char in UNRESERVED)) {
+                append(char)
+            } else {
+                append('%').append(code.toString(16).uppercase().padStart(2, '0'))
+            }
+        }
+    }
+
+    private const val UNRESERVED = "-._~"
+
     /** One creature's atlas page, by slug. */
     fun atlasCreature(slug: String) = "atlas/$slug"
 
+    /**
+     * One event's page, optionally about one occurrence.
+     *
+     * [runId] is what an announcement's link carries, and it is dropped when
+     * absent rather than sent as an empty argument — `events/x?run=` would reach
+     * the screen as a blank string and be forwarded to the server as one.
+     */
+    fun event(slug: String, runId: String? = null): String {
+        val base = "events/$slug"
+        return if (runId.isNullOrBlank()) base else "$base?run=$runId"
+    }
+
+    /** One arc, by slug. */
+    fun eventSeries(slug: String) = "events/series/$slug"
+
     /**
      * 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;
@@ -128,6 +227,35 @@ object Routes {
         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
+        // An engagement rule's tickle carries the TRIGGER id as its stream
+        // (ENGAGEMENT.md §7.2's one namespace), and `event.run.started` is the only
+        // event trigger that is also a push stream. The calendar is the honest
+        // destination when there is no inbox row to send it to — the tickle names
+        // no occurrence, so there is no page to open. A row, when there is one,
+        // wins via [forTickle] and carries the link that does.
+        else -> if (streamId.startsWith(EVENT_STREAM_PREFIX)) EVENTS else HOME
     }
+
+    /** What every core `event.` trigger id begins with (EVENTS.md §J). */
+    private const val EVENT_STREAM_PREFIX = "event."
+
+
+    /**
+     * Where a tapped tickle lands, given both halves of `{ stream, ref }`.
+     *
+     * **A `notification:<id>` ref means the engine wrote this user an inbox row**
+     * (`pushChannel.js` builds it), so the tap goes to the inbox whatever the
+     * stream is — an engagement rule's stream id is a TRIGGER id in §7.2's one
+     * namespace, and [forStream]'s fixed map would send most of them to Home.
+     * Every other tickle keeps the route it has always had, so no shipped stream
+     * changes where it lands.
+     *
+     * The ref is not decoded beyond that prefix and is never rendered: it is a
+     * hint that a row exists, and the app's contract is wake-and-pull.
+     */
+    fun forTickle(streamId: String, ref: String?): String =
+        if (ref != null && ref.startsWith(INBOX_REF_PREFIX)) NOTIFICATIONS else forStream(streamId)
+
+    /** What `pushChannel.js` prefixes an inbox row's id with. */
+    const val INBOX_REF_PREFIX = "notification:"
 }

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

@@ -0,0 +1,60 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.ui.notifications
+
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.viewModelScope
+import com.runicgateway.app.core.auth.Session
+import com.runicgateway.app.core.auth.SessionManager
+import com.runicgateway.app.core.inbox.InboxCache
+import com.runicgateway.app.core.net.BaseUrlHolder
+import com.runicgateway.app.core.result.ApiResult
+import com.runicgateway.app.data.repository.NotificationsRepository
+import dagger.hilt.android.lifecycle.HiltViewModel
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.StateFlow
+import kotlinx.coroutines.flow.asStateFlow
+import kotlinx.coroutines.launch
+import javax.inject.Inject
+
+/**
+ * The drawer's unread badge (ENGAGEMENT.md phase 8).
+ *
+ * Its own view model, and its own endpoint: `/notifications/unread-count` exists
+ * precisely because this is the question asked most often and it should not make
+ * the server assemble a page of bodies to answer with one integer. Refreshed when
+ * the app resumes rather than on a timer — the tickle is what says "something
+ * happened", so polling would be a second, worse copy of push.
+ *
+ * Falls back to the cached count while offline, for the same reason the inbox
+ * does: a badge that dropped to zero because the train went into a tunnel would
+ * be telling the user they have read something they have not.
+ */
+@HiltViewModel
+class InboxBadgeViewModel @Inject constructor(
+    private val notifications: NotificationsRepository,
+    private val cache: InboxCache,
+    private val sessionManager: SessionManager,
+    private val baseUrlHolder: BaseUrlHolder,
+) : ViewModel() {
+
+    private val _unread = MutableStateFlow(0)
+    val unread: StateFlow<Int> = _unread.asStateFlow()
+
+    /** Ask the server, falling back to the snapshot. A signed-out session is zero. */
+    fun refresh() = viewModelScope.launch {
+        val user = (sessionManager.state.value as? Session.SignedIn)?.user
+        if (user == null) {
+            _unread.value = 0
+            return@launch
+        }
+        when (val result = notifications.unreadCount()) {
+            is ApiResult.Ok -> _unread.value = result.data.unread
+            else -> {
+                val owner = InboxCache.ownerKey(baseUrlHolder.current?.toString(), user.id)
+                cache.read(owner)?.let { _unread.value = it.unread }
+            }
+        }
+    }
+}

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

@@ -0,0 +1,34 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.ui.notifications
+
+import com.runicgateway.app.core.time.parseWireInstant
+import java.time.ZoneId
+import java.time.format.DateTimeFormatter
+import java.time.format.FormatStyle
+
+/**
+ * Render an inbox item's `createdAt` for display, in the device's own zone and
+ * locale (ENGAGEMENT.md phase 8). Pure, so it is unit-testable off-device.
+ *
+ * **Two shapes have to be accepted, and which one arrives is not the app's to
+ * decide** — see [parseWireInstant], which owns that trap for every screen that
+ * reads a timestamp, this one and the event screens (M13).
+ *
+ * Anything unparseable returns null and the row simply shows no stamp: a
+ * notification with an odd date is still worth reading.
+ */
+fun inboxTimestamp(
+    raw: String,
+    zone: ZoneId = ZoneId.systemDefault(),
+    formatter: DateTimeFormatter =
+        DateTimeFormatter.ofLocalizedDateTime(FormatStyle.MEDIUM, FormatStyle.SHORT),
+): String? {
+    val instant = parseWireInstant(raw) ?: return null
+    return try {
+        formatter.withZone(zone).format(instant)
+    } catch (_: Exception) {
+        null
+    }
+}

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

@@ -0,0 +1,215 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.ui.notifications
+
+import androidx.compose.foundation.background
+import androidx.compose.foundation.clickable
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.PaddingValues
+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.lazy.LazyColumn
+import androidx.compose.foundation.lazy.items
+import androidx.compose.foundation.shape.CircleShape
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.filled.Settings
+import androidx.compose.material3.Icon
+import androidx.compose.material3.IconButton
+import androidx.compose.material3.MaterialTheme
+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.draw.clip
+import androidx.compose.ui.platform.LocalContext
+import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.unit.dp
+import androidx.hilt.navigation.compose.hiltViewModel
+import androidx.lifecycle.compose.collectAsStateWithLifecycle
+import com.runicgateway.app.R
+import com.runicgateway.app.core.web.WebHandoff
+import com.runicgateway.app.data.api.dto.NotificationItemDto
+import com.runicgateway.app.ui.UiState
+import com.runicgateway.app.ui.components.EmptyView
+import com.runicgateway.app.ui.components.ErrorView
+import com.runicgateway.app.ui.components.LoadingView
+import com.runicgateway.app.ui.components.ShardCard
+
+/**
+ * The in-app inbox (ENGAGEMENT.md phase 8): what the engine's `inapp` channel
+ * wrote for this user, newest first.
+ *
+ * This is the drawer's "Notifications" — the settings that used to live there are
+ * one tap away behind the gear, mirroring exactly what phase 7 shipped on the web
+ * (the bare path is the inbox, `…/settings` is the preferences). It is what a
+ * tapped push tickle deep-links to, and the pull that follows the wake.
+ *
+ * **The list carries content, so it is deliberately plain text.** An item's body
+ * is the server's `toText` render, never the email HTML — that markup is table
+ * rows and inline hex with a light-only `color-scheme`, which in a themed app
+ * would be a pale card in a dark one. It also means there is no operator markup
+ * on this surface to sanitize.
+ */
+@Composable
+fun InboxScreen(
+    onOpenSettings: () -> Unit,
+    onOpenRoute: (String) -> Unit,
+    modifier: Modifier = Modifier,
+    viewModel: InboxViewModel = hiltViewModel(),
+) {
+    val state by viewModel.state.collectAsStateWithLifecycle()
+    val context = LocalContext.current
+
+    Column(modifier.fillMaxSize()) {
+        Row(
+            modifier = Modifier.fillMaxWidth().padding(start = 16.dp, end = 4.dp, top = 8.dp),
+            verticalAlignment = Alignment.CenterVertically,
+        ) {
+            Text(
+                text = if (state.unread > 0) {
+                    stringResource(R.string.inbox_unread_count, state.unread)
+                } else {
+                    stringResource(R.string.inbox_all_read)
+                },
+                style = MaterialTheme.typography.labelLarge,
+                color = MaterialTheme.colorScheme.onSurfaceVariant,
+                modifier = Modifier.weight(1f),
+            )
+            if (state.unread > 0) {
+                TextButton(onClick = viewModel::markAllRead) {
+                    Text(stringResource(R.string.inbox_mark_all_read))
+                }
+            }
+            IconButton(onClick = onOpenSettings) {
+                Icon(Icons.Filled.Settings, stringResource(R.string.inbox_open_settings))
+            }
+        }
+
+        // Showing the snapshot rather than the server's answer is said out loud: a
+        // notification surface that quietly showed a stale list would be lying
+        // about the one thing it exists to be — current.
+        if (state.fromCache) {
+            Text(
+                text = stringResource(R.string.inbox_offline_cached),
+                style = MaterialTheme.typography.bodySmall,
+                color = MaterialTheme.colorScheme.onSurfaceVariant,
+                modifier = Modifier.padding(horizontal = 16.dp, vertical = 4.dp),
+            )
+        }
+
+        when (val items = state.items) {
+            is UiState.Loading -> LoadingView()
+            is UiState.Error -> ErrorView(items.kind, onRetry = viewModel::load)
+            is UiState.Success -> if (items.data.isEmpty()) {
+                EmptyView(stringResource(R.string.inbox_empty))
+            } else {
+                InboxList(
+                    items = items.data,
+                    hasMore = state.hasMore && !state.fromCache,
+                    onEndReached = viewModel::loadMore,
+                    onOpen = { item ->
+                        viewModel.markRead(item.id)
+                        // Most items have no url at all — an inbox row is complete on
+                        // its own — and the ones that do carry a SITE-RELATIVE path.
+                        //
+                        // A path the app has a screen for opens natively (M13): an
+                        // event announcement's link is the case that made this worth
+                        // doing. Everything else resolves against the configured
+                        // shard and goes to the browser, exactly as before.
+                        val route = viewModel.routeFor(item)
+                        if (route != null) {
+                            onOpenRoute(route)
+                        } else {
+                            viewModel.linkFor(item)?.let { WebHandoff.open(context, it) }
+                        }
+                    },
+                )
+            }
+        }
+    }
+}
+
+@Composable
+private fun InboxList(
+    items: List<NotificationItemDto>,
+    hasMore: Boolean,
+    onEndReached: () -> Unit,
+    onOpen: (NotificationItemDto) -> Unit,
+) {
+    LazyColumn(
+        modifier = Modifier.fillMaxSize().padding(horizontal = 16.dp),
+        verticalArrangement = Arrangement.spacedBy(8.dp),
+        contentPadding = PaddingValues(vertical = 12.dp),
+    ) {
+        items(items, key = { it.id }) { item -> InboxCard(item, onOpen) }
+        if (hasMore) {
+            item {
+                // Paging by "the last row came into view" rather than a button: the
+                // cursor is the last id on screen, so reaching the end IS the request.
+                LaunchedEffect(items.lastOrNull()?.id) { onEndReached() }
+                Box(Modifier.fillMaxWidth().padding(16.dp), contentAlignment = Alignment.Center) {
+                    Text(
+                        stringResource(R.string.inbox_loading_more),
+                        style = MaterialTheme.typography.bodySmall,
+                        color = MaterialTheme.colorScheme.onSurfaceVariant,
+                    )
+                }
+            }
+        }
+    }
+}
+
+@Composable
+private fun InboxCard(item: NotificationItemDto, onOpen: (NotificationItemDto) -> Unit) {
+    ShardCard(Modifier.fillMaxWidth().clickable { onOpen(item) }) {
+        Column(Modifier.padding(16.dp)) {
+            Row(verticalAlignment = Alignment.CenterVertically) {
+                if (!item.read) {
+                    // The unread mark is a dot beside the title AND a heavier weight
+                    // on it: colour alone would carry the whole signal, which is not
+                    // a distinction everyone can see.
+                    Box(
+                        Modifier
+                            .padding(end = 8.dp)
+                            .size(8.dp)
+                            .clip(CircleShape)
+                            .background(MaterialTheme.colorScheme.primary),
+                    )
+                }
+                Text(
+                    text = item.title,
+                    style = MaterialTheme.typography.titleSmall,
+                    fontWeight = if (item.read) FontWeight.Normal else FontWeight.Bold,
+                    modifier = Modifier.weight(1f),
+                )
+            }
+            item.body?.takeIf { it.isNotBlank() }?.let {
+                Text(
+                    text = it,
+                    style = MaterialTheme.typography.bodyMedium,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                    modifier = Modifier.padding(top = 6.dp),
+                )
+            }
+            val stamp = item.createdAt?.let { inboxTimestamp(it) }
+            if (stamp != null) {
+                Text(
+                    text = stamp,
+                    style = MaterialTheme.typography.labelSmall,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                    modifier = Modifier.padding(top = 8.dp),
+                )
+            }
+        }
+    }
+}

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

@@ -0,0 +1,307 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.ui.notifications
+
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.viewModelScope
+import com.runicgateway.app.core.auth.Session
+import com.runicgateway.app.core.auth.SessionManager
+import com.runicgateway.app.core.inbox.InboxCache
+import com.runicgateway.app.core.net.BaseUrlHolder
+import com.runicgateway.app.core.result.ApiResult
+import com.runicgateway.app.core.result.map
+import com.runicgateway.app.data.api.dto.NotificationItemDto
+import com.runicgateway.app.data.repository.NotificationsRepository
+import com.runicgateway.app.ui.UiState
+import com.runicgateway.app.ui.navigation.resolveWebPath
+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.distinctUntilChanged
+import kotlinx.coroutines.flow.map
+import kotlinx.coroutines.flow.update
+import kotlinx.coroutines.launch
+import javax.inject.Inject
+
+/**
+ * Drives the in-app inbox (ENGAGEMENT.md phase 8): the items the engine's `inapp`
+ * channel wrote for this user, newest first, with the unread badge and the two
+ * mark-read writes.
+ *
+ * **The tickle contract is wake-and-pull, and this is the pull.** A push tickle
+ * carries `{ stream, ref }` and nothing else by design; `ref` is a HINT that an
+ * inbox row exists, never content, and `pushChannel.js` says so in as many words —
+ * the two rows are independent and either can be retried, so a client that
+ * rendered the ref would show nothing the first time a retry reordered them. So a
+ * tap deep-links here and this refreshes; the ref is not read.
+ *
+ * **Paging is keyset, not offset.** The next page is `before = the last id on
+ * screen`, because the list gains rows at the top while it is being read and an
+ * offset would show the same item twice or skip one.
+ *
+ * **It reloads when the ACCOUNT changes, not merely when it is created.** A
+ * drawer route's view model outlives a sign-out: `navigateTopLevel` saves and
+ * restores back-stack state, so the `NavBackStackEntry` keeps its
+ * `ViewModelStore` and a view model that loaded only in `init` never runs again.
+ * Signing out and back in as somebody else showed the second account the FIRST
+ * account's inbox — titles and body text written for another person — with no
+ * request made at all, while the badge beside it showed the new account's real
+ * count, because the shell refreshes that one on every session change.
+ *
+ * [InboxCache] was never the hole: it is keyed by `(base URL, user id)` and a
+ * snapshot has never crossed an account. The hole was the in-memory state, which
+ * nothing invalidated.
+ */
+@HiltViewModel
+class InboxViewModel @Inject constructor(
+    private val notifications: NotificationsRepository,
+    private val cache: InboxCache,
+    private val sessionManager: SessionManager,
+    private val baseUrlHolder: BaseUrlHolder,
+) : ViewModel() {
+
+    data class State(
+        val items: UiState<List<NotificationItemDto>> = UiState.Loading,
+        val unread: Int = 0,
+        val hasMore: Boolean = false,
+        val loadingMore: Boolean = false,
+        val refreshing: Boolean = false,
+        /**
+         * True while what is on screen came from [InboxCache] rather than the
+         * server. The screen says so — an inbox that quietly showed a stale list
+         * would be a notification surface that lies about being current.
+         */
+        val fromCache: Boolean = false,
+        /** When that snapshot was captured; only meaningful with [fromCache]. */
+        val cachedAt: Long? = null,
+    )
+
+    private val _state = MutableStateFlow(State())
+    val state: StateFlow<State> = _state.asStateFlow()
+
+    init {
+        viewModelScope.launch {
+            sessionManager.state
+                .map { (it as? Session.SignedIn)?.user?.id }
+                .distinctUntilChanged()
+                .collect { userId ->
+                    if (userId == null) {
+                        // Signed out. The shell is already navigating away; drop the
+                        // rows rather than leave them addressable behind it.
+                        _state.value = State(items = UiState.Success(emptyList()))
+                    } else {
+                        // Reset BEFORE loading, not after: `load()` paints the cache
+                        // only when there is no `Success` on screen, so the previous
+                        // account's rows would otherwise stay up — and stay up for
+                        // the whole round trip.
+                        _state.value = State()
+                        load()
+                    }
+                }
+        }
+    }
+
+    /**
+     * Show the cached page immediately, then refresh from the server.
+     *
+     * The cache is painted first rather than after a failure so a cold open on a
+     * slow connection shows the last known inbox instead of a spinner; a
+     * successful pull replaces it, and a network failure leaves it up with
+     * [State.fromCache] set. A *server* error is a different thing from being
+     * offline and is not papered over with stale rows — unless there is nothing
+     * else to show, in which case the error is still what the screen reports.
+     */
+    fun load() = viewModelScope.launch {
+        val owner = ownerKey()
+        if (owner != null && _state.value.items !is UiState.Success) {
+            cache.read(owner)?.let { snapshot ->
+                _state.update {
+                    it.copy(
+                        items = UiState.Success(snapshot.items),
+                        unread = snapshot.unread,
+                        fromCache = true,
+                        cachedAt = snapshot.savedAt,
+                    )
+                }
+            }
+        }
+        refresh()
+    }
+
+    /** Pull the newest page. Keeps whatever is on screen until it succeeds. */
+    fun refresh() = viewModelScope.launch {
+        _state.update { it.copy(refreshing = true) }
+        when (val result = notifications.inbox()) {
+            is ApiResult.Ok -> {
+                val page = result.data
+                _state.update {
+                    it.copy(
+                        items = UiState.Success(page.items),
+                        unread = page.unread,
+                        hasMore = page.hasMore,
+                        refreshing = false,
+                        fromCache = false,
+                        cachedAt = null,
+                    )
+                }
+                ownerKey()?.let { cache.write(it, page.items, page.unread) }
+            }
+            else -> {
+                // Nothing cached to fall back on → the error IS the screen. Something
+                // cached → keep it up and label it, which is the whole point of §7's
+                // "the app degrades, it does not fail".
+                val holdCache = _state.value.items is UiState.Success && _state.value.fromCache
+                _state.update {
+                    it.copy(
+                        items = if (holdCache) it.items else result.map { page -> page.items }.toUiState(),
+                        refreshing = false,
+                    )
+                }
+            }
+        }
+    }
+
+    /**
+     * Append the next page.
+     *
+     * A no-op while one is in flight, when the server said there is no next page,
+     * or while the list is the cached snapshot — paging a cache we know to be one
+     * page long would ask the server for `before` an id it may no longer have.
+     */
+    fun loadMore() = viewModelScope.launch {
+        val current = _state.value
+        val shown = (current.items as? UiState.Success)?.data ?: return@launch
+        if (current.loadingMore || !current.hasMore || current.fromCache) return@launch
+        val cursor = shown.lastOrNull()?.id ?: return@launch
+
+        _state.update { it.copy(loadingMore = true) }
+        when (val result = notifications.inbox(before = cursor)) {
+            is ApiResult.Ok -> {
+                // Guard the same id arriving twice: a keyset window can shift under
+                // a concurrent write, and a duplicate id in a LazyColumn key crashes.
+                val seen = shown.mapTo(mutableSetOf()) { it.id }
+                val appended = result.data.items.filterNot { it.id in seen }
+                _state.update {
+                    it.copy(
+                        items = UiState.Success(shown + appended),
+                        unread = result.data.unread,
+                        hasMore = result.data.hasMore,
+                        loadingMore = false,
+                    )
+                }
+            }
+            // A failed "more" leaves the pages already read alone — losing them
+            // because the fourth page timed out would be worse than stopping.
+            else -> _state.update { it.copy(loadingMore = false, hasMore = false) }
+        }
+    }
+
+    /**
+     * Mark one item read, optimistically.
+     *
+     * The row flips locally before the call so the tap feels immediate, and the
+     * server's post-write `unread` replaces the local guess when it lands. A
+     * failure is not rolled back: read-ness is the least consequential thing in
+     * the app to get briefly wrong, and un-reading a row under the user's finger
+     * looks like a bug. The next refresh corrects it.
+     */
+    fun markRead(id: Long) = viewModelScope.launch {
+        val shown = (_state.value.items as? UiState.Success)?.data ?: return@launch
+        if (shown.firstOrNull { it.id == id }?.read != false) return@launch
+
+        _state.update { current ->
+            current.copy(
+                items = UiState.Success(shown.map { if (it.id == id) it.copy(read = true) else it }),
+                unread = (current.unread - 1).coerceAtLeast(0),
+            )
+        }
+        when (val result = notifications.markRead(id)) {
+            is ApiResult.Ok -> _state.update { it.copy(unread = result.data.unread) }
+            else -> Unit
+        }
+        cacheCurrent()
+    }
+
+    /** Mark the whole inbox read. Same optimism, and the same reason for it. */
+    fun markAllRead() = viewModelScope.launch {
+        val shown = (_state.value.items as? UiState.Success)?.data ?: return@launch
+        _state.update {
+            it.copy(items = UiState.Success(shown.map { item -> item.copy(read = true) }), unread = 0)
+        }
+        notifications.markAllRead()
+        cacheCurrent()
+    }
+
+    /**
+     * The absolute link for an item, or null when it has none this app can open.
+     *
+     * **An item's `url` is SITE-RELATIVE** — `/guilds/the-silver-anvil/forum/403`
+     * is what the server writes, because it is rendered from the template's button
+     * block for a browser that is already on the site. A phone is not, so it has to
+     * be resolved against the configured base or every link in the inbox is dead;
+     * the live rig is what caught that.
+     *
+     * `HttpUrl.resolve` does both jobs: it absolutises a relative path and it
+     * returns null for anything that would not end up as http(s) — a `javascript:`
+     * or `intent:` url in a notification body opens nothing at all.
+     */
+    fun linkFor(item: NotificationItemDto): String? {
+        val raw = item.url?.trim().orEmpty()
+        if (raw.isEmpty()) return null
+        return baseUrlHolder.current?.resolve(raw)?.toString()
+    }
+
+    /**
+     * The app route this item opens natively, or null when it has none and
+     * [linkFor] should hand it to a browser (M13).
+     *
+     * **Why this exists at all:** events Phase 14a gave the six public `event.`
+     * triggers an `eventUrl` of the form `/site/events/<slug>?run=<id>`, so an
+     * inbox row about an event now has a native destination — and opening a
+     * Custom Tab onto a page the app itself renders is a worse answer than it was
+     * when there was no such page.
+     *
+     * **It reuses `resolveWebPath` rather than adding a second link-routing
+     * mechanism.** That function is already the app's read of the site's own route
+     * table, it already answers null for everything it does not recognise, and
+     * every path it does not recognise still hands off exactly as before. Adding a
+     * parser here would put the decision in two places.
+     *
+     * The item's url is site-relative by contract, but an absolute one on this
+     * host is accepted too: the shape is the server's to change, and a link that
+     * opened the browser only because it arrived fully qualified would be a
+     * puzzle. An absolute url on ANOTHER host is not ours to route — the app has
+     * no screen for somebody else's site — so it falls through to the browser.
+     */
+    fun routeFor(item: NotificationItemDto): String? {
+        val raw = item.url?.trim().orEmpty()
+        if (raw.isEmpty()) return null
+        val base = baseUrlHolder.current ?: return null
+        val resolved = base.resolve(raw) ?: return null
+        if (resolved.host != base.host) return null
+        val query = resolved.query
+        return resolveWebPath(resolved.encodedPath + if (query.isNullOrEmpty()) "" else "?$query")
+    }
+
+    /**
+     * Keep the snapshot in step with a local read.
+     *
+     * Without this, going offline right after reading everything would bring the
+     * badge back on the next cold open. Only ever written for the account that
+     * owns it — [InboxCache] scopes by (base URL, user id).
+     */
+    private suspend fun cacheCurrent() {
+        val owner = ownerKey() ?: return
+        val current = _state.value
+        val shown = (current.items as? UiState.Success)?.data ?: return
+        cache.write(owner, shown, current.unread)
+    }
+
+    private fun ownerKey(): String? {
+        val user = (sessionManager.state.value as? Session.SignedIn)?.user ?: return null
+        return InboxCache.ownerKey(baseUrlHolder.current?.toString(), user.id)
+    }
+}

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

@@ -0,0 +1,271 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.ui.notifications
+
+import android.Manifest
+import android.os.Build
+import androidx.activity.compose.rememberLauncherForActivityResult
+import androidx.activity.result.contract.ActivityResultContracts
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.FlowRow
+import androidx.compose.foundation.layout.ExperimentalLayoutApi
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.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.FilterChip
+import androidx.compose.material3.HorizontalDivider
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Switch
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.getValue
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.text.font.FontStyle
+import androidx.compose.ui.unit.dp
+import androidx.hilt.navigation.compose.hiltViewModel
+import androidx.lifecycle.compose.collectAsStateWithLifecycle
+import com.runicgateway.app.R
+import com.runicgateway.app.data.api.dto.NotificationChannelDto
+import com.runicgateway.app.data.api.dto.NotificationChannelItemDto
+import com.runicgateway.app.data.api.dto.NotificationChannelPrefsDto
+import com.runicgateway.app.ui.UiState
+import com.runicgateway.app.ui.components.EmptyView
+import com.runicgateway.app.ui.components.ErrorView
+import com.runicgateway.app.ui.components.LoadingView
+import com.runicgateway.app.ui.components.SectionLabel
+
+/**
+ * The notification **settings** screen (PLAN.md §11, ENGAGEMENT.md phase 8): every
+ * subscribable id with a control per channel that applies to it.
+ *
+ * It used to be the drawer's "Notifications"; that entry is the inbox now and this
+ * is behind its gear, which is the arrangement phase 7 shipped on the web. What
+ * changed underneath is bigger than the move: the screen asks
+ * `/notifications/channels` and so can express email and on-site preferences, not
+ * just whether a stream pushes.
+ *
+ * **A channel with two modes gets a switch and one with three gets chips**, and
+ * which is which comes off the wire — `email` is the one that supports `digest`
+ * today, and a fourth channel with its own modes would render correctly here
+ * without an app release.
+ */
+@Composable
+fun NotificationSettingsScreen(
+    modifier: Modifier = Modifier,
+    viewModel: NotificationSettingsViewModel = hiltViewModel(),
+) {
+    val state by viewModel.state.collectAsStateWithLifecycle()
+
+    // Ask once for POST_NOTIFICATIONS when the user first switches a push mode on
+    // (API 33+). Email and in-app need no permission — only push posts anything.
+    val permissionLauncher = rememberLauncherForActivityResult(
+        ActivityResultContracts.RequestPermission(),
+    ) { /* granted or not, the preference is already saved server-side */ }
+
+    fun ensureNotificationPermission() {
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU) {
+            permissionLauncher.launch(Manifest.permission.POST_NOTIFICATIONS)
+        }
+    }
+
+    Column(
+        modifier = modifier
+            .fillMaxSize()
+            .verticalScroll(rememberScrollState())
+            .padding(16.dp),
+    ) {
+        Text(
+            text = stringResource(R.string.notifications_title),
+            style = MaterialTheme.typography.titleLarge,
+        )
+        Spacer(Modifier.height(4.dp))
+        Text(
+            text = stringResource(R.string.notifications_subtitle),
+            style = MaterialTheme.typography.bodyMedium,
+            color = MaterialTheme.colorScheme.onSurfaceVariant,
+        )
+        Spacer(Modifier.height(16.dp))
+
+        state.feedback?.let { fb ->
+            Text(
+                text = stringResource(fb.messageRes),
+                style = MaterialTheme.typography.bodyMedium,
+                color = if (fb.ok) MaterialTheme.colorScheme.primary else MaterialTheme.colorScheme.error,
+                modifier = Modifier.padding(bottom = 12.dp),
+            )
+        }
+
+        // A shard with no push relay still has email and on-site preferences worth
+        // setting, so this is a note beside the list now rather than the whole
+        // screen — which is what it had to be when push was all there was.
+        if (!state.supported) {
+            Text(
+                text = stringResource(R.string.notifications_unsupported),
+                style = MaterialTheme.typography.bodySmall,
+                color = MaterialTheme.colorScheme.onSurfaceVariant,
+                fontStyle = FontStyle.Italic,
+                modifier = Modifier.padding(bottom = 12.dp),
+            )
+        }
+
+        when (val prefs = state.prefs) {
+            is UiState.Loading -> LoadingView()
+            is UiState.Error -> ErrorView(kind = prefs.kind, onRetry = viewModel::load)
+            is UiState.Success -> ChannelPrefsList(
+                prefs = prefs.data,
+                hasLinkedAccount = state.hasLinkedAccount,
+                pushSupported = state.supported,
+                busy = state.busy,
+                onSetMode = { item, channel, mode ->
+                    if (channel == CHANNEL_PUSH && mode != MODE_OFF) ensureNotificationPermission()
+                    viewModel.setMode(item, channel, mode)
+                },
+            )
+        }
+    }
+}
+
+@Composable
+private fun ChannelPrefsList(
+    prefs: NotificationChannelPrefsDto,
+    hasLinkedAccount: Boolean,
+    pushSupported: Boolean,
+    busy: Boolean,
+    onSetMode: (NotificationChannelItemDto, String, String) -> Unit,
+) {
+    if (prefs.items.isEmpty()) {
+        EmptyView(message = stringResource(R.string.notifications_empty))
+        return
+    }
+    val channelsById = prefs.channels.associateBy { it.id }
+    val (personal, general) = prefs.items.partition { it.personal }
+
+    if (general.isNotEmpty()) {
+        SectionLabel(stringResource(R.string.notifications_section_general))
+        Spacer(Modifier.height(8.dp))
+        general.forEach { item ->
+            ItemRow(item, channelsById, hint = null, enabled = !busy, pushSupported = pushSupported, onSetMode = onSetMode)
+            HorizontalDivider()
+        }
+        Spacer(Modifier.height(20.dp))
+    }
+
+    if (personal.isNotEmpty()) {
+        SectionLabel(stringResource(R.string.notifications_section_personal))
+        Spacer(Modifier.height(8.dp))
+        personal.forEach { item ->
+            val selectable = itemSelectable(item, hasLinkedAccount)
+            ItemRow(
+                item = item,
+                channelsById = channelsById,
+                hint = if (!selectable) stringResource(R.string.notifications_requires_link) else null,
+                enabled = !busy && selectable,
+                pushSupported = pushSupported,
+                onSetMode = onSetMode,
+            )
+            HorizontalDivider()
+        }
+    }
+}
+
+@Composable
+private fun ItemRow(
+    item: NotificationChannelItemDto,
+    channelsById: Map<String, NotificationChannelDto>,
+    hint: String?,
+    enabled: Boolean,
+    pushSupported: Boolean,
+    onSetMode: (NotificationChannelItemDto, String, String) -> Unit,
+) {
+    Column(Modifier.fillMaxWidth().padding(vertical = 12.dp)) {
+        Text(
+            text = item.label,
+            style = MaterialTheme.typography.bodyLarge,
+            color = if (enabled) MaterialTheme.colorScheme.onSurface else MaterialTheme.colorScheme.onSurfaceVariant,
+        )
+        Text(
+            text = hint ?: item.description,
+            style = MaterialTheme.typography.bodySmall,
+            color = MaterialTheme.colorScheme.onSurfaceVariant,
+            fontStyle = if (hint != null) FontStyle.Italic else FontStyle.Normal,
+        )
+        // The item's OWN channel list, in the registry's order. An id nothing can
+        // push carries no push control at all, rather than a dead switch.
+        item.channels.forEach { channelId ->
+            val channel = channelsById[channelId] ?: return@forEach
+            if (channelId == CHANNEL_PUSH && !pushSupported) return@forEach
+            ChannelControl(
+                channel = channel,
+                mode = item.modes[channelId] ?: channel.defaultMode,
+                enabled = enabled,
+                onSetMode = { mode -> onSetMode(item, channelId, mode) },
+            )
+        }
+    }
+}
+
+@OptIn(ExperimentalLayoutApi::class)
+@Composable
+private fun ChannelControl(
+    channel: NotificationChannelDto,
+    mode: String,
+    enabled: Boolean,
+    onSetMode: (String) -> Unit,
+) {
+    val modes = channel.modes.ifEmpty { listOf(MODE_OFF) }
+    Row(
+        modifier = Modifier.fillMaxWidth().padding(top = 8.dp),
+        verticalAlignment = Alignment.CenterVertically,
+    ) {
+        Text(
+            text = channel.label,
+            style = MaterialTheme.typography.bodyMedium,
+            color = MaterialTheme.colorScheme.onSurfaceVariant,
+            modifier = Modifier.weight(1f).padding(end = 12.dp),
+        )
+        // Two modes is a yes/no question and reads best as a switch; three is a
+        // choice and needs its options named — `digest` means nothing as an
+        // unlabelled third state.
+        if (modes.size == 2 && modes.contains(MODE_OFF)) {
+            val on = modes.first { it != MODE_OFF }
+            Switch(
+                checked = mode != MODE_OFF,
+                onCheckedChange = { checked -> onSetMode(if (checked) on else MODE_OFF) },
+                enabled = enabled,
+            )
+        } else {
+            FlowRow(horizontalArrangement = Arrangement.spacedBy(6.dp)) {
+                modes.forEach { candidate ->
+                    FilterChip(
+                        selected = candidate == mode,
+                        onClick = { if (candidate != mode) onSetMode(candidate) },
+                        enabled = enabled,
+                        label = { Text(modeLabel(candidate)) },
+                    )
+                }
+            }
+        }
+    }
+}
+
+/**
+ * Copy for a delivery mode. A mode this build has never heard of is labelled with
+ * its own wire name rather than hidden — the server accepts it, so a chip reading
+ * `weekly` is more use to the person in front of it than a control that vanished.
+ */
+@Composable
+private fun modeLabel(mode: String): String = when (mode) {
+    MODE_OFF -> stringResource(R.string.notifications_mode_off)
+    "instant" -> stringResource(R.string.notifications_mode_instant)
+    "digest" -> stringResource(R.string.notifications_mode_digest)
+    else -> mode
+}

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

@@ -0,0 +1,167 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.ui.notifications
+
+import androidx.annotation.StringRes
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.viewModelScope
+import com.runicgateway.app.R
+import com.runicgateway.app.core.auth.Session
+import com.runicgateway.app.core.auth.SessionManager
+import com.runicgateway.app.core.push.PushManager
+import com.runicgateway.app.core.result.ApiResult
+import com.runicgateway.app.data.api.dto.NotificationChannelItemDto
+import com.runicgateway.app.data.api.dto.NotificationChannelPrefsDto
+import com.runicgateway.app.data.repository.NotificationsRepository
+import com.runicgateway.app.data.repository.PlayerShardRepository
+import com.runicgateway.app.ui.UiState
+import com.runicgateway.app.ui.toUiState
+import dagger.hilt.android.lifecycle.HiltViewModel
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.StateFlow
+import kotlinx.coroutines.flow.asStateFlow
+import kotlinx.coroutines.flow.distinctUntilChanged
+import kotlinx.coroutines.flow.map
+import kotlinx.coroutines.flow.update
+import kotlinx.coroutines.launch
+import javax.inject.Inject
+
+/** The push channel's id — the one channel that also drives a device registration. */
+const val CHANNEL_PUSH = "push"
+
+/** The mode every channel accepts, and the one that means "do not deliver". */
+const val MODE_OFF = "off"
+
+/**
+ * Drives the notification **settings** screen (PLAN.md §11, ENGAGEMENT.md phase 8).
+ *
+ * **This screen moved off `/notifications/subscriptions` onto
+ * `/notifications/channels`.** The old endpoint asked one question — is push on
+ * for this stream — and there are now three channels to ask it of. The server
+ * keeps `notification_subscriptions` as the push projection of the new table and
+ * fans every write to either into the other, so the shipped APK's screen went on
+ * working the whole time and this one is not a migration anybody has to run.
+ *
+ * **The controls are rendered from the wire, never from a hardcoded three.** Each
+ * item names the channels that apply to it — a trigger-only id carries no `push`
+ * because nothing is registered to push it — and each channel names the modes it
+ * accepts, which is how `email`'s `digest` reaches the app without an app release.
+ * The modes the server sends are the EFFECTIVE ones (it has already substituted
+ * each channel's default), so this class never re-implements the defaulting.
+ */
+@HiltViewModel
+class NotificationSettingsViewModel @Inject constructor(
+    private val notifications: NotificationsRepository,
+    private val playerShard: PlayerShardRepository,
+    private val pushManager: PushManager,
+    sessionManager: SessionManager,
+) : ViewModel() {
+
+    data class Feedback(val ok: Boolean, @param:StringRes val messageRes: Int)
+
+    data class State(
+        val prefs: UiState<NotificationChannelPrefsDto> = UiState.Loading,
+        /** Whether the user has ≥1 linked game account — personal streams need it. */
+        val hasLinkedAccount: Boolean = false,
+        /** Whether this shard advertises a push relay at all (else the screen says so). */
+        val supported: Boolean = true,
+        val busy: Boolean = false,
+        val feedback: Feedback? = null,
+    )
+
+    private val _state = MutableStateFlow(State())
+    val state: StateFlow<State> = _state.asStateFlow()
+
+    init {
+        viewModelScope.launch {
+            pushManager.supported.collect { supported -> _state.update { it.copy(supported = supported) } }
+        }
+        // Reloaded on an account change for the reason the inbox is, and one
+        // reason more: these controls are WRITTEN from. A screen still rendering
+        // the previous account's preferences would send this account's PUT built
+        // out of them, so a stale render here corrupts rather than merely
+        // discloses.
+        viewModelScope.launch {
+            sessionManager.state
+                .map { (it as? Session.SignedIn)?.user?.id }
+                .distinctUntilChanged()
+                .collect { userId -> if (userId != null) load() }
+        }
+    }
+
+    fun load() {
+        _state.update { it.copy(prefs = UiState.Loading) }
+        viewModelScope.launch {
+            _state.update { it.copy(prefs = notifications.channelPrefs().toUiState()) }
+            // A linked game account gates the personal streams; failure → treat as none.
+            val linked = (playerShard.accounts() as? ApiResult.Ok)?.data?.isNotEmpty() == true
+            _state.update { it.copy(hasLinkedAccount = linked) }
+        }
+    }
+
+    fun clearFeedback() = _state.update { it.copy(feedback = null) }
+
+    /**
+     * Set one (item, channel) pair.
+     *
+     * One pair, one sparse PUT: the endpoint writes only what it is given, so a
+     * toggle cannot disturb a channel this screen is not showing — and the
+     * response is the full stored truth, which is what the screen re-renders
+     * from. An entry the server drops (an unknown id, an inapplicable channel)
+     * therefore shows up as the control springing back, not as a silent lie.
+     */
+    fun setMode(item: NotificationChannelItemDto, channel: String, mode: String) {
+        val current = _state.value
+        if (current.busy) return
+        if (channel == CHANNEL_PUSH && !itemSelectable(item, current.hasLinkedAccount)) return
+
+        _state.update { it.copy(busy = true, feedback = null) }
+        viewModelScope.launch {
+            when (val result = notifications.setChannelMode(item.id, channel, mode)) {
+                is ApiResult.Ok -> {
+                    _state.update { it.copy(prefs = UiState.Success(result.data)) }
+                    if (channel == CHANNEL_PUSH) reconcilePush(result.data) else finish(true, R.string.notifications_saved)
+                }
+                is ApiResult.NetworkError -> finish(false, R.string.error_network)
+                is ApiResult.HttpError -> finish(false, R.string.notifications_save_error)
+            }
+        }
+    }
+
+    /**
+     * Register or unregister the device to match the stored push set (PLAN.md §11).
+     *
+     * Read from the RESPONSE rather than from what was just sent, because the
+     * server may have dropped the entry — and because "is any push mode on" is a
+     * question about the whole table, not about the row that changed.
+     */
+    private suspend fun reconcilePush(prefs: NotificationChannelPrefsDto) {
+        val anyPushOn = prefs.items.any { item ->
+            val mode = item.modes[CHANNEL_PUSH]
+            mode != null && mode != MODE_OFF
+        }
+        if (!anyPushOn) {
+            pushManager.disable()
+            finish(true, R.string.notifications_all_off)
+            return
+        }
+        when (val res = pushManager.enable()) {
+            is PushManager.PushResult.Enabled -> finish(true, R.string.notifications_saved)
+            is PushManager.PushResult.Unsupported -> finish(false, R.string.notifications_unsupported)
+            is PushManager.PushResult.NotSignedIn -> finish(false, R.string.notifications_save_error)
+            is PushManager.PushResult.Failed ->
+                finish(false, if (res.status == 400) R.string.notifications_relay_error else R.string.notifications_save_error)
+        }
+    }
+
+    private fun finish(ok: Boolean, @StringRes messageRes: Int) =
+        _state.update { it.copy(busy = false, feedback = Feedback(ok, messageRes)) }
+}
+
+/**
+ * Whether an item's controls are selectable for a user: a personal stream needs a
+ * linked game account (PLAN.md §11). Pure so the gating is unit-tested without Compose.
+ */
+fun itemSelectable(item: NotificationChannelItemDto, hasLinkedAccount: Boolean): Boolean =
+    !item.requiresLinkedAccount || hasLinkedAccount

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

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

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

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

app/src/main/java/com/runicgateway/app/ui/rust/RustBadgeViewModel.kt

@@ -0,0 +1,88 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.ui.rust
+
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.viewModelScope
+import com.runicgateway.app.core.result.ApiResult
+import com.runicgateway.app.data.repository.RustRepository
+import dagger.hilt.android.lifecycle.HiltViewModel
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.StateFlow
+import kotlinx.coroutines.flow.asStateFlow
+import kotlinx.coroutines.launch
+import javax.inject.Inject
+
+/**
+ * The live player count on the drawer's Rust row — the phone's answer to D15
+ * (`docs/modules/rust/PLAN.md` §17.4).
+ *
+ * ## Why the drawer and not a footer
+ *
+ * D15 put "2 servers · 42 online" in core's `site.footer.status` slot, which
+ * exists because every page of the website renders the same footer. The app has
+ * no footer and no slot; what it has is a drawer row per surface and, already, a
+ * precedent for a number beside one — the inbox's unread badge, in the same
+ * `NavigationDrawerItem` badge slot, with the same screen-reader treatment. So
+ * the count rides there.
+ *
+ * **The number is players, not servers.** A badge is one integer, and of the two
+ * halves of D15's line the live one is how many people are on: a server count
+ * changes when an operator edits configuration, which is not news, and is visible
+ * on the page the row opens anyway.
+ *
+ * ## What keeps it honest
+ *
+ * The website's version renders nothing until it has an answer, nothing at all if
+ * the request fails, and never polls — because one request per page view is a
+ * cost and a timer in a footer on every page is a different kind of thing. All
+ * three rules hold here:
+ *
+ *  - **Zero renders nothing.** No badge, rather than a `0` — an empty server is
+ *    not a notification.
+ *  - **A failure leaves the last count** rather than dropping to zero. A moment
+ *    with no connectivity is not everybody logging off.
+ *  - **It refreshes on resume, with the unread badge**, and never on a timer. The
+ *    count is a glance, not a feed.
+ *
+ * It is asked for **only when the module is installed** — the caller gates on the
+ * `rust` capability — so a site running a different game makes no request at all.
+ */
+@HiltViewModel
+class RustBadgeViewModel @Inject constructor(
+    private val repository: RustRepository,
+) : ViewModel() {
+
+    private val _online = MutableStateFlow(0)
+
+    /** How many people are on across every server, or 0 when there is nothing to say. */
+    val online: StateFlow<Int> = _online.asStateFlow()
+
+    /**
+     * Ask, if the Rust module is there.
+     *
+     * [installed] is passed in rather than read here so this holds no opinion
+     * about capabilities: the drawer already knows, and a view model that
+     * re-derived it would be a second copy of a rule that lives in one place.
+     * Absent — the host has not answered yet — makes no request and keeps
+     * whatever is showing.
+     */
+    fun refresh(installed: Boolean) {
+        if (!installed) {
+            _online.value = 0
+            return
+        }
+
+        viewModelScope.launch {
+            when (val result = repository.servers()) {
+                // A server that is stale or unreachable already answers `online:
+                // false` with `players: 0`, so summing the whole list needs no
+                // second staleness rule here.
+                is ApiResult.Ok -> _online.value = result.data.sumOf { it.players }
+                // Keep the last number. See the class doc.
+                else -> Unit
+            }
+        }
+    }
+}

app/src/main/java/com/runicgateway/app/ui/rust/RustFeed.kt

@@ -0,0 +1,199 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.ui.rust
+
+import com.runicgateway.app.data.api.dto.RustEventDto
+
+/**
+ * One stored frame as one line of a feed — the Kotlin half of `module-rust`'s
+ * `client/src/lib/feed.js` (PLAN.md §9 M14).
+ *
+ * `GET /public/rust/servers/{id}/events` answers rows shaped
+ * `{ id, kind, t, wipeId, steamId, frame }`, where `frame` is the whole frame the
+ * bridge plugin emitted. Everything a killfeed line needs is in there, under the
+ * names the plugin wrote, and **this file is the one place in the app that knows
+ * them**.
+ *
+ * ## It returns parts, not a sentence
+ *
+ * A row wants the names emphasised and the detail muted, and a function returning
+ * `"Alice killed Bob"` would force the screen to re-parse its own output to style
+ * it. Parts also make this testable without Compose, which is the only way this
+ * leg has real coverage of what a feed row says.
+ *
+ * ## The rule for an unknown kind
+ *
+ * **It renders as itself.** A later protocol adds kinds and an operator's module
+ * may be older than their game host, so a feed that dropped what it did not
+ * recognise would be a screen quietly saying less than the truth. The server's
+ * allowlist has already decided the row may be seen; what is left here is
+ * presentation, and the honest presentation of a kind we have no words for is its
+ * own name.
+ */
+
+/** The row's category, for the small colour a screen gives it — never for meaning. */
+enum class FeedTone { KILL, DEATH, JOIN, LEAVE, CHAT, SERVER, OTHER }
+
+/**
+ * One row, ready to render.
+ *
+ * [actor] and [subject] are names and are emphasised; [verb] and [detail] are
+ * prose. Any of them may be null or empty.
+ *
+ * [join] is what goes between the actor and the verb, and it exists for exactly
+ * one case: chat. "Brannock see you in september" is not a sentence anybody
+ * writes, and putting the colon in the message would put presentation inside text
+ * a player typed.
+ */
+data class FeedLine(
+    val tone: FeedTone,
+    val actor: String? = null,
+    val join: String = " ",
+    val verb: String = "",
+    val subject: String? = null,
+    val detail: String = "",
+)
+
+/** One filter the feed offers, and the kinds it asks the API for. */
+data class FeedFilter(val id: String, val label: String, val kinds: List<String>)
+
+/**
+ * Kinds this feed asks for.
+ *
+ * `player.tally` is public and deliberately **not** here: it is an aggregate the
+ * plugin flushes every sixty seconds per active player, so a feed including it
+ * would be mostly wood counts. It is the leaderboard's input, and the leaderboard
+ * is where it shows up.
+ */
+val FEED_KINDS: List<String> = listOf(
+    "player.death",
+    "player.connected",
+    "player.disconnected",
+    "player.respawned",
+    "player.chat",
+    "server.wipe",
+    "server.initialized",
+    "server.shutdown",
+)
+
+/** The filters the feed offers. The first is the default and asks for everything. */
+val FEED_FILTERS: List<FeedFilter> = listOf(
+    FeedFilter("all", "Everything", FEED_KINDS),
+    FeedFilter("kills", "Kills", listOf("player.death")),
+    FeedFilter("chat", "Chat", listOf("player.chat")),
+    FeedFilter(
+        "sessions",
+        "Comings and goings",
+        listOf("player.connected", "player.disconnected", "player.respawned"),
+    ),
+    FeedFilter("server", "Server", listOf("server.wipe", "server.initialized", "server.shutdown")),
+)
+
+/** The kinds a filter id asks for; an id nobody offers falls back to everything. */
+fun kindsFor(filterId: String): List<String> =
+    (FEED_FILTERS.firstOrNull { it.id == filterId } ?: FEED_FILTERS.first()).kinds
+
+/** One row as the parts a screen renders. */
+fun describe(row: RustEventDto): FeedLine {
+    val name = row.str("name")
+
+    return when (row.kind) {
+        "player.death" -> death(row, name)
+
+        "player.connected" ->
+            FeedLine(FeedTone.JOIN, actor = name, verb = "connected")
+
+        "player.disconnected" -> FeedLine(
+            tone = FeedTone.LEAVE,
+            actor = name,
+            verb = "disconnected",
+            // Two optional halves, and the session is the interesting one. The
+            // plugin OMITS `sessionSec` for a player who was already on when it
+            // loaded, so an absent value means "unknown" and never zero — which is
+            // why this reads the parsed number rather than trusting a default.
+            detail = listOfNotNull(
+                row.str("reason"),
+                row.num("sessionSec")?.takeIf { it > 0 }?.let { "after ${playtime(it.toLong())}" },
+            ).joinToString(" · "),
+        )
+
+        "player.respawned" ->
+            FeedLine(FeedTone.JOIN, actor = name, verb = "respawned")
+
+        "player.chat" -> FeedLine(
+            tone = FeedTone.CHAT,
+            actor = name,
+            join = ": ",
+            // The message is the row, so it goes in `verb` where a screen renders
+            // it unemphasised — and it is the one field on this wire whose bytes a
+            // player chooses. Compose renders it as text and never as markup;
+            // nothing here may ever stop doing that.
+            verb = row.str("message").orEmpty(),
+            detail = row.str("channel")?.takeIf { it != "Global" }.orEmpty(),
+        )
+
+        "server.wipe" -> FeedLine(
+            tone = FeedTone.SERVER,
+            verb = "The map was wiped",
+            detail = row.str("wipeId")?.let { "new wipe $it" }.orEmpty(),
+        )
+
+        "server.initialized" -> FeedLine(FeedTone.SERVER, verb = "The server came up")
+
+        "server.shutdown" -> FeedLine(FeedTone.SERVER, verb = "The server went down")
+
+        else -> FeedLine(
+            tone = FeedTone.OTHER,
+            actor = name,
+            verb = row.kind.takeIf { it.isNotBlank() } ?: "unknown",
+        )
+    }
+}
+
+/**
+ * A death, which is four different sentences.
+ *
+ * The plugin distinguishes `player`, `self`, `npc` and `environment` precisely so
+ * a reader does not have to guess from an absent field, and collapsing any two of
+ * them loses something. A killfeed reporting a fall as a kill by nobody is the
+ * failure this avoids.
+ */
+private fun death(row: RustEventDto, name: String?): FeedLine {
+    val where = listOfNotNull(
+        row.str("weapon")?.let { "with ${prefabName(it)}" },
+        row.num("distance")?.let { "${Math.round(it)}m" },
+        row.str("grid"),
+        if (row.flag("sleeping")) "while sleeping" else null,
+    ).joinToString(" · ")
+
+    return when (row.str("attackerType")) {
+        "player" -> FeedLine(
+            tone = FeedTone.KILL,
+            actor = row.str("attackerName"),
+            verb = "killed",
+            subject = name,
+            detail = where,
+        )
+
+        "self" -> FeedLine(
+            tone = FeedTone.DEATH,
+            actor = name,
+            verb = "died by their own hand",
+            detail = where,
+        )
+
+        "npc" -> FeedLine(
+            tone = FeedTone.DEATH,
+            actor = prefabName(row.str("attackerName")).ifBlank { "Something" },
+            verb = "killed",
+            subject = name,
+            detail = where,
+        )
+
+        // `environment` and anything else: falling, drowning, the world. The
+        // plugin legitimately has no attacker on this path, so an ABSENT type is
+        // this case rather than a missing field to complain about.
+        else -> FeedLine(tone = FeedTone.DEATH, actor = name, verb = "died", detail = where)
+    }
+}

app/src/main/java/com/runicgateway/app/ui/rust/RustFormat.kt

@@ -0,0 +1,154 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.ui.rust
+
+import com.runicgateway.app.core.time.parseWireInstant
+import java.time.Instant
+import java.time.ZoneId
+import java.time.format.DateTimeFormatter
+import java.time.format.FormatStyle
+import java.util.Locale
+
+/**
+ * Formatting for the Rust screens — pure, no Compose, no Android (PLAN.md §9
+ * M14).
+ *
+ * The Kotlin half of `module-rust`'s `client/src/lib/format.js`, and it is a
+ * deliberate second implementation rather than something shared: the two clients
+ * have different formatting libraries under them (`Intl` there, `java.time`
+ * here), and the thing worth keeping identical is the **rules**, not the code.
+ * Those rules are restated here beside each function so a reader can check them
+ * against the website without opening it.
+ *
+ * Everything takes `now` as a parameter, so a boundary is testable rather than a
+ * property of the machine the test runs on.
+ */
+
+/**
+ * The stamp on a feed row.
+ *
+ * **Today's rows get a time; everything older gets a date as well.** The feed can
+ * be filtered to a past wipe, and a row from six weeks ago rendered as `14:03`
+ * reads as this afternoon — which is exactly what the website's own page walk
+ * found, three events from August all apparently a few minutes old. The boundary
+ * is the **calendar day**, not a duration, because that is what a reader means by
+ * "what time was that".
+ */
+fun feedClock(
+    value: String?,
+    epochMillis: Long? = null,
+    now: Instant = Instant.now(),
+    zone: ZoneId = ZoneId.systemDefault(),
+    locale: Locale = Locale.getDefault(),
+): String {
+    val at = epochMillis?.takeIf { it > 0 }?.let(Instant::ofEpochMilli) ?: parseWireInstant(value) ?: return ""
+
+    val time = DateTimeFormatter.ofLocalizedTime(FormatStyle.SHORT)
+        .withLocale(locale)
+        .format(at.atZone(zone))
+
+    val sameDay = at.atZone(zone).toLocalDate() == now.atZone(zone).toLocalDate()
+    if (sameDay) return time
+
+    val date = DateTimeFormatter.ofPattern("d MMM", locale).format(at.atZone(zone))
+    return "$date $time"
+}
+
+/** A date, for a wipe: the thing people actually compare wipes by. */
+fun wipeDay(
+    value: String?,
+    zone: ZoneId = ZoneId.systemDefault(),
+    locale: Locale = Locale.getDefault(),
+): String? {
+    val at = parseWireInstant(value) ?: return null
+    return DateTimeFormatter.ofLocalizedDate(FormatStyle.MEDIUM)
+        .withLocale(locale)
+        .format(at.atZone(zone))
+}
+
+/**
+ * "3 minutes ago", for a "last reported" line.
+ *
+ * Returns null rather than a word for an absent stamp, so the caller decides what
+ * "never" looks like in its own layout — on this surface a server that has never
+ * reported is a real and ordinary state, not a missing value to apologise for.
+ */
+fun rustAgo(value: String?, now: Instant = Instant.now()): String? {
+    val at = parseWireInstant(value) ?: return null
+    val seconds = java.time.Duration.between(at, now).seconds
+
+    // Under a minute in either direction, say the thing rather than "in 0 seconds".
+    if (kotlin.math.abs(seconds) < 45) return "just now"
+
+    val future = seconds < 0
+    val magnitude = kotlin.math.abs(seconds)
+    val (unit, size) = AGO_UNITS.first { magnitude >= it.second }
+    val amount = Math.round(magnitude.toDouble() / size)
+    val plural = if (amount == 1L) unit else "${unit}s"
+
+    return if (future) "in $amount $plural" else "$amount $plural ago"
+}
+
+private val AGO_UNITS = listOf(
+    "year" to 31_536_000L,
+    "month" to 2_592_000L,
+    "week" to 604_800L,
+    "day" to 86_400L,
+    "hour" to 3_600L,
+    "minute" to 60L,
+    "second" to 1L,
+)
+
+/**
+ * A session or a playtime, as `4h 12m`.
+ *
+ * Seconds are dropped above a minute and kept below it: a two-hour session
+ * reported to the second is noise, and a forty-second one reported as "0m" is
+ * wrong.
+ */
+fun playtime(seconds: Long?): String {
+    val total = seconds ?: return "—"
+    if (total <= 0) return "—"
+    if (total < 60) return "${total}s"
+
+    val hours = total / 3600
+    val minutes = Math.round((total % 3600) / 60.0)
+
+    return when {
+        hours == 0L -> "${minutes}m"
+        minutes == 0L -> "${hours}h"
+        else -> "${hours}h ${minutes}m"
+    }
+}
+
+/**
+ * A prefab short name as something readable — `patrolhelicopter` stays itself,
+ * `rifle.ak` becomes `rifle ak`.
+ *
+ * Deliberately a light touch rather than a lookup table: a table mapping every
+ * Rust prefab to a pretty name is a second copy of the game's item list that goes
+ * stale every wipe, and the short name is what a Rust player reads on their own
+ * server console anyway.
+ */
+fun prefabName(name: String?): String {
+    if (name.isNullOrBlank()) return ""
+    return name.replace(Regex("[_.]+"), " ").trim()
+}
+
+/** A steam id, shortened for a table cell, without pretending it is a name. */
+fun shortSteamId(steamId: String?): String {
+    val id = steamId.orEmpty()
+    return if (id.length > 10) "…${id.takeLast(6)}" else id
+}
+
+/**
+ * What to call a player who has no name yet.
+ *
+ * The presence board and the leaderboard both carry a nullable `name`: the plugin
+ * knows a steam id before it knows anything else. Showing a shortened id is
+ * honest — it is not a name and does not look like one — where "Unknown" would
+ * lose the only identifier there is.
+ */
+fun playerLabel(name: String?, steamId: String?): String =
+    name?.takeIf { it.isNotBlank() } ?: shortSteamId(steamId)

app/src/main/java/com/runicgateway/app/ui/rust/RustServerScreen.kt

@@ -0,0 +1,566 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.ui.rust
+
+import androidx.compose.foundation.clickable
+import androidx.compose.foundation.horizontalScroll
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.PaddingValues
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.lazy.LazyColumn
+import androidx.compose.foundation.lazy.items
+import androidx.compose.foundation.rememberScrollState
+import androidx.compose.material3.FilterChip
+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.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.draw.alpha
+import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.text.style.TextOverflow
+import androidx.compose.ui.unit.dp
+import androidx.hilt.navigation.compose.hiltViewModel
+import androidx.lifecycle.compose.collectAsStateWithLifecycle
+import com.runicgateway.app.R
+import com.runicgateway.app.data.api.dto.RustEventDto
+import com.runicgateway.app.data.api.dto.RustLeaderboardRowDto
+import com.runicgateway.app.data.api.dto.RustPresenceDto
+import com.runicgateway.app.data.api.dto.RustServerDto
+import com.runicgateway.app.data.api.dto.RustWipeDto
+import com.runicgateway.app.ui.ErrorKind
+import com.runicgateway.app.ui.PollWhileResumed
+import com.runicgateway.app.ui.Polled
+import com.runicgateway.app.ui.UiState
+import com.runicgateway.app.ui.components.EmptyView
+import com.runicgateway.app.ui.components.ErrorView
+import com.runicgateway.app.ui.components.LoadingView
+import com.runicgateway.app.ui.components.PillTone
+import com.runicgateway.app.ui.components.SectionLabel
+import com.runicgateway.app.ui.components.ShardCard
+import com.runicgateway.app.ui.components.StatusPill
+
+/**
+ * One Rust server: the feed, the leaderboard, who is on, and the wipes (D13).
+ *
+ * **One screen with tabs, not four destinations** — the same call the website
+ * makes, and more obviously right on a phone: the four panels are four questions
+ * about one thing, and a reader moving between them is not navigating.
+ *
+ * The phase criterion lives here. With the server unreachable this still renders
+ * its map, size, seed, wipe date, killfeed, leaderboards, last known presence
+ * board and wipe history, because every one of those is read from the website's
+ * own tables rather than from the game.
+ */
+@Composable
+fun RustServerScreen(
+    onBack: () -> Unit,
+    modifier: Modifier = Modifier,
+    viewModel: RustServerViewModel = hiltViewModel(),
+) {
+    val ui by viewModel.state.collectAsStateWithLifecycle()
+
+    PollWhileResumed { viewModel.refresh() }
+
+    when (val s = ui.server.state) {
+        is UiState.Loading -> LoadingView(modifier)
+
+        // **A mistyped address is not a fault and must not be dressed as one.**
+        // The website's first version put its generic error panel under this
+        // heading, so an unknown id read "No such server / Something went wrong"
+        // and sent a reader looking for an outage. A 404 is its own answer; the
+        // error panel is kept for a request that failed for a reason nobody can
+        // see. A server an operator disabled answers the same 404 — switching one
+        // off is not switching it into a refusal.
+        is UiState.Error -> if (s.kind == ErrorKind.NOT_FOUND) {
+            MissingServer(onBack, modifier)
+        } else {
+            ErrorView(s.kind, onRetry = viewModel::load, modifier = modifier)
+        }
+
+        is UiState.Success -> ServerDetail(s.data, ui, viewModel, modifier)
+    }
+}
+
+@Composable
+private fun MissingServer(onBack: () -> Unit, modifier: Modifier = Modifier) {
+    Column(
+        modifier = modifier.fillMaxSize().padding(24.dp),
+        verticalArrangement = Arrangement.spacedBy(8.dp),
+    ) {
+        Text(stringResource(R.string.rust_no_such_server), style = MaterialTheme.typography.titleLarge)
+        Text(
+            text = stringResource(R.string.rust_no_such_server_detail),
+            style = MaterialTheme.typography.bodyMedium,
+            color = MaterialTheme.colorScheme.onSurfaceVariant,
+        )
+        Text(
+            text = stringResource(R.string.rust_back_to_servers),
+            style = MaterialTheme.typography.bodyMedium,
+            color = MaterialTheme.colorScheme.primary,
+            modifier = Modifier.clickable(onClick = onBack).padding(top = 8.dp),
+        )
+    }
+}
+
+@Composable
+private fun ServerDetail(
+    server: RustServerDto,
+    ui: RustServerUi,
+    viewModel: RustServerViewModel,
+    modifier: Modifier = Modifier,
+) {
+    Column(modifier.fillMaxSize()) {
+        ServerHeader(server, ui.selectedWipe, viewModel::selectWipe, ui.wipes)
+
+        val tabs = RustTab.entries
+        ScrollableTabRow(selectedTabIndex = tabs.indexOf(ui.tab), edgePadding = 16.dp) {
+            tabs.forEach { tab ->
+                Tab(
+                    selected = tab == ui.tab,
+                    onClick = { viewModel.selectTab(tab) },
+                    text = { Text(stringResource(tabLabel(tab))) },
+                )
+            }
+        }
+
+        when (ui.tab) {
+            RustTab.FEED -> FeedPanel(ui.feed, ui.filterId, viewModel::selectFilter, viewModel::retryFeed)
+            RustTab.LEADERBOARD -> LeaderboardPanel(
+                ui.leaderboard,
+                ui.sort,
+                viewModel::selectSort,
+                viewModel::retryLeaderboard,
+            )
+            RustTab.ONLINE -> OnlinePanel(ui.online, server.online, viewModel::retryOnline)
+            RustTab.WIPES -> WipesPanel(
+                ui.wipes,
+                server.wipeId,
+                ui.selectedWipe,
+                viewModel::openWipe,
+                viewModel::retryWipes,
+            )
+        }
+    }
+}
+
+private fun tabLabel(tab: RustTab): Int = when (tab) {
+    RustTab.FEED -> R.string.rust_tab_feed
+    RustTab.LEADERBOARD -> R.string.rust_tab_leaderboard
+    RustTab.ONLINE -> R.string.rust_tab_online
+    RustTab.WIPES -> R.string.rust_tab_wipes
+}
+
+@Composable
+private fun ServerHeader(
+    server: RustServerDto,
+    selectedWipe: String?,
+    onSelectWipe: (String?) -> Unit,
+    wipes: UiState<List<RustWipeDto>>,
+) {
+    Column(Modifier.padding(horizontal = 16.dp, vertical = 12.dp)) {
+        Text(server.name.ifBlank { server.id }, style = MaterialTheme.typography.headlineSmall)
+
+        describeWorld(server)?.let {
+            Text(
+                text = it,
+                style = MaterialTheme.typography.bodySmall,
+                color = MaterialTheme.colorScheme.onSurfaceVariant,
+                modifier = Modifier.padding(top = 4.dp),
+            )
+        }
+
+        Row(
+            modifier = Modifier.fillMaxWidth().padding(top = 8.dp),
+            horizontalArrangement = Arrangement.spacedBy(12.dp),
+            verticalAlignment = Alignment.CenterVertically,
+        ) {
+            if (server.online) {
+                StatusPill(
+                    text = stringResource(R.string.rust_online_count, server.players, server.maxPlayers),
+                    tone = PillTone.Success,
+                )
+            } else {
+                StatusPill(text = stringResource(R.string.rust_offline), tone = PillTone.Neutral)
+            }
+            Text(
+                text = lastReported(server),
+                style = MaterialTheme.typography.bodySmall,
+                color = MaterialTheme.colorScheme.onSurfaceVariant,
+            )
+        }
+
+        // The wipe picker sits above the tabs because it filters two of them. It
+        // is absent until the wipe list has loaded — offering a filter with one
+        // option would look like a server that has only ever had one wipe.
+        val available = (wipes as? UiState.Success)?.data.orEmpty()
+        if (available.isNotEmpty()) {
+            WipeFilter(available, server.wipeId, selectedWipe, onSelectWipe)
+        }
+    }
+}
+
+@Composable
+private fun WipeFilter(
+    wipes: List<RustWipeDto>,
+    currentWipeId: String?,
+    selected: String?,
+    onSelect: (String?) -> Unit,
+) {
+    Row(
+        modifier = Modifier.fillMaxWidth().horizontalScroll(rememberScrollState()).padding(top = 10.dp),
+        horizontalArrangement = Arrangement.spacedBy(8.dp),
+    ) {
+        // **Null is all time, and it is the default.** It is a real choice rather
+        // than an absent filter: all-time is the per-wipe rows summed, which is
+        // the answer to "who plays here", where a wipe is the answer to "who is
+        // winning now".
+        FilterChip(
+            selected = selected == null,
+            onClick = { onSelect(null) },
+            label = { Text(stringResource(R.string.rust_all_time)) },
+        )
+        wipes.forEach { wipe ->
+            val label = wipeDay(wipe.saveCreatedAt ?: wipe.firstSeen) ?: wipe.wipeId
+            FilterChip(
+                selected = selected == wipe.wipeId,
+                onClick = { onSelect(wipe.wipeId) },
+                label = {
+                    Text(
+                        if (wipe.wipeId == currentWipeId) {
+                            stringResource(R.string.rust_wipe_current, label)
+                        } else {
+                            label
+                        },
+                    )
+                },
+            )
+        }
+    }
+}
+
+// ── Feed ──────────────────────────────────────────────────────────────────
+
+@Composable
+private fun FeedPanel(
+    feed: Polled<List<RustEventDto>>,
+    filterId: String,
+    onFilter: (String) -> Unit,
+    onRetry: () -> Unit,
+) {
+    Column(Modifier.fillMaxSize()) {
+        Row(
+            modifier = Modifier.fillMaxWidth().horizontalScroll(rememberScrollState())
+                .padding(horizontal = 16.dp, vertical = 8.dp),
+            horizontalArrangement = Arrangement.spacedBy(8.dp),
+        ) {
+            FEED_FILTERS.forEach { filter ->
+                FilterChip(
+                    selected = filter.id == filterId,
+                    onClick = { onFilter(filter.id) },
+                    label = { Text(filter.label) },
+                )
+            }
+        }
+
+        when (val s = feed.state) {
+            is UiState.Loading -> LoadingView()
+            is UiState.Error -> ErrorView(s.kind, onRetry = onRetry)
+            is UiState.Success -> if (s.data.isEmpty()) {
+                EmptyView(stringResource(R.string.rust_feed_empty))
+            } else {
+                LazyColumn(
+                    contentPadding = PaddingValues(horizontal = 16.dp, vertical = 8.dp),
+                    verticalArrangement = Arrangement.spacedBy(10.dp),
+                ) {
+                    if (feed.refreshFailed) {
+                        item { RefreshFailedLine() }
+                    }
+                    items(s.data, key = { it.id }) { FeedRow(it) }
+                }
+            }
+        }
+    }
+}
+
+@Composable
+private fun FeedRow(row: RustEventDto) {
+    val line = describe(row)
+
+    Row(verticalAlignment = Alignment.Top) {
+        // The stamp carries a date for anything not from today — a row from six
+        // weeks ago rendered as a bare time reads as this afternoon, which is
+        // exactly what happens the moment the feed is filtered to a past wipe.
+        Text(
+            text = feedClock(value = null, epochMillis = row.t),
+            style = MaterialTheme.typography.labelSmall,
+            color = MaterialTheme.colorScheme.onSurfaceVariant,
+            modifier = Modifier.padding(end = 10.dp, top = 2.dp),
+        )
+        Column {
+            Row {
+                line.actor?.let {
+                    Text(it, style = MaterialTheme.typography.bodyMedium, fontWeight = FontWeight.SemiBold)
+                    Text(line.join, style = MaterialTheme.typography.bodyMedium)
+                }
+                // The chat message lands here, and it is the one field on this
+                // wire whose bytes a player chooses. Compose renders it as text
+                // and never as markup; nothing here may ever stop doing that.
+                Text(line.verb, style = MaterialTheme.typography.bodyMedium)
+                line.subject?.let {
+                    Text(" ", style = MaterialTheme.typography.bodyMedium)
+                    Text(it, style = MaterialTheme.typography.bodyMedium, fontWeight = FontWeight.SemiBold)
+                }
+            }
+            if (line.detail.isNotBlank()) {
+                Text(
+                    text = line.detail,
+                    style = MaterialTheme.typography.bodySmall,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                )
+            }
+        }
+    }
+}
+
+// ── Leaderboard ───────────────────────────────────────────────────────────
+
+/**
+ * The columns, and which of them the API can sort by.
+ *
+ * `structures` has no sort on the wire and therefore no tap here — a header that
+ * sorts by something other than what it says is worse than one that does not
+ * sort.
+ */
+private data class RustColumn(val labelRes: Int, val sort: String?, val value: (RustLeaderboardRowDto) -> String)
+
+/** The name's share of the row against one numeric column's. */
+private const val NAME_WEIGHT = 1.7f
+
+/** How far a header that is not the current sort is faded. */
+private const val SORTED_AWAY = 0.55f
+
+private val RUST_COLUMNS = listOf(
+    RustColumn(R.string.rust_col_kills, RustSort.KILLS) { it.kills.toString() },
+    RustColumn(R.string.rust_col_deaths, RustSort.DEATHS) { it.deaths.toString() },
+    RustColumn(R.string.rust_col_npc_kills, RustSort.NPC_KILLS) { it.npcKills.toString() },
+    RustColumn(R.string.rust_col_structures, null) { it.structures.toString() },
+    RustColumn(R.string.rust_col_played, RustSort.PLAYTIME) { playtime(it.playtimeSec) },
+)
+
+@Composable
+private fun LeaderboardPanel(
+    state: UiState<List<RustLeaderboardRowDto>>,
+    sort: String,
+    onSort: (String) -> Unit,
+    onRetry: () -> Unit,
+) {
+    when (state) {
+        is UiState.Loading -> LoadingView()
+        is UiState.Error -> ErrorView(state.kind, onRetry = onRetry)
+        is UiState.Success -> if (state.data.isEmpty()) {
+            // **Empty is a real answer here and is not "no data".** All-time is
+            // the per-wipe rows summed, so a player who appears only in an older
+            // wipe drops out of the current one rather than reading zero — an
+            // empty board for a wipe means nobody scored on that map.
+            EmptyView(stringResource(R.string.rust_leaderboard_empty))
+        } else {
+            LazyColumn(
+                contentPadding = PaddingValues(16.dp),
+                verticalArrangement = Arrangement.spacedBy(8.dp),
+            ) {
+                item {
+                    Row(Modifier.fillMaxWidth()) {
+                        SectionLabel(
+                            text = stringResource(R.string.rust_col_player),
+                            modifier = Modifier.weight(NAME_WEIGHT),
+                        )
+                        RUST_COLUMNS.forEach { column ->
+                            // The ACTIVE sort is marked on the header, not on the
+                            // values: the header is the control, and tinting a
+                            // column of numbers instead says "these are special"
+                            // rather than "this is what the table is ordered by".
+                            SectionLabel(
+                                text = stringResource(column.labelRes),
+                                modifier = Modifier
+                                    .weight(1f)
+                                    .then(
+                                        if (column.sort != null) {
+                                            Modifier.clickable { onSort(column.sort) }
+                                        } else {
+                                            Modifier
+                                        },
+                                    )
+                                    .then(
+                                        if (column.sort == sort) {
+                                            Modifier.alpha(1f)
+                                        } else {
+                                            Modifier.alpha(SORTED_AWAY)
+                                        },
+                                    ),
+                            )
+                        }
+                    }
+                }
+                items(state.data, key = { it.steamId }) { row ->
+                    Row(Modifier.fillMaxWidth(), verticalAlignment = Alignment.CenterVertically) {
+                        // A wider share for the name, and one line with an ellipsis.
+                        // Five numeric columns beside an equal-weight name column
+                        // left "Brannock" touching its own kill count, which the
+                        // walk read as one field.
+                        Text(
+                            text = playerLabel(row.name, row.steamId),
+                            style = MaterialTheme.typography.bodyMedium,
+                            maxLines = 1,
+                            overflow = TextOverflow.Ellipsis,
+                            modifier = Modifier.weight(NAME_WEIGHT).padding(end = 8.dp),
+                        )
+                        RUST_COLUMNS.forEach { column ->
+                            Text(
+                                text = column.value(row),
+                                style = MaterialTheme.typography.bodySmall,
+                                color = MaterialTheme.colorScheme.onSurfaceVariant,
+                                maxLines = 1,
+                                modifier = Modifier.weight(1f),
+                            )
+                        }
+                    }
+                }
+            }
+        }
+    }
+}
+
+// ── Online ────────────────────────────────────────────────────────────────
+
+@Composable
+private fun OnlinePanel(
+    online: Polled<List<RustPresenceDto>>,
+    serverOnline: Boolean,
+    onRetry: () -> Unit,
+) {
+    when (val s = online.state) {
+        is UiState.Loading -> LoadingView()
+        is UiState.Error -> ErrorView(s.kind, onRetry = onRetry)
+        is UiState.Success -> if (s.data.isEmpty()) {
+            EmptyView(
+                stringResource(
+                    if (serverOnline) R.string.rust_nobody_on else R.string.rust_presence_offline,
+                ),
+            )
+        } else {
+            LazyColumn(
+                contentPadding = PaddingValues(16.dp),
+                verticalArrangement = Arrangement.spacedBy(8.dp),
+            ) {
+                // **The board is the last one that ARRIVED, and an unreachable
+                // server does not clear it** — deliberately, because these rows
+                // are still the best answer anybody has. Presented bare they read
+                // as "these people are on right now", which is the one thing an
+                // offline server cannot be saying. So the panel says which it is.
+                item {
+                    Text(
+                        text = stringResource(
+                            if (serverOnline) R.string.rust_presence_live else R.string.rust_presence_last_known,
+                        ),
+                        style = MaterialTheme.typography.bodySmall,
+                        color = MaterialTheme.colorScheme.onSurfaceVariant,
+                    )
+                }
+                if (online.refreshFailed) {
+                    item { RefreshFailedLine() }
+                }
+                items(s.data, key = { it.steamId }) { player ->
+                    ShardCard(Modifier.fillMaxWidth()) {
+                        Row(
+                            Modifier.fillMaxWidth().padding(16.dp),
+                            verticalAlignment = Alignment.CenterVertically,
+                        ) {
+                            Text(
+                                text = playerLabel(player.name, player.steamId),
+                                style = MaterialTheme.typography.bodyMedium,
+                                modifier = Modifier.weight(1f),
+                            )
+                            if (player.sleeping) {
+                                StatusPill(
+                                    text = stringResource(R.string.rust_sleeping),
+                                    tone = PillTone.Neutral,
+                                )
+                            }
+                        }
+                    }
+                }
+            }
+        }
+    }
+}
+
+// ── Wipes ─────────────────────────────────────────────────────────────────
+
+@Composable
+private fun WipesPanel(
+    state: UiState<List<RustWipeDto>>,
+    currentWipeId: String?,
+    selected: String?,
+    onOpenWipe: (String) -> Unit,
+    onRetry: () -> Unit,
+) {
+    when (state) {
+        is UiState.Loading -> LoadingView()
+        is UiState.Error -> ErrorView(state.kind, onRetry = onRetry)
+        is UiState.Success -> if (state.data.isEmpty()) {
+            EmptyView(stringResource(R.string.rust_wipes_empty))
+        } else {
+            LazyColumn(
+                contentPadding = PaddingValues(16.dp),
+                verticalArrangement = Arrangement.spacedBy(8.dp),
+            ) {
+                items(state.data, key = { it.wipeId }) { wipe ->
+                    ShardCard(
+                        Modifier.fillMaxWidth().clickable { onOpenWipe(wipe.wipeId) },
+                    ) {
+                        Row(
+                            Modifier.fillMaxWidth().padding(16.dp),
+                            verticalAlignment = Alignment.CenterVertically,
+                        ) {
+                            Text(
+                                text = wipeDay(wipe.saveCreatedAt ?: wipe.firstSeen) ?: wipe.wipeId,
+                                style = MaterialTheme.typography.bodyMedium,
+                                modifier = Modifier.weight(1f),
+                            )
+                            if (wipe.wipeId == currentWipeId) {
+                                StatusPill(
+                                    text = stringResource(R.string.rust_wipe_this_one),
+                                    tone = PillTone.Success,
+                                )
+                            } else if (wipe.wipeId == selected) {
+                                StatusPill(
+                                    text = stringResource(R.string.rust_wipe_selected),
+                                    tone = PillTone.Info,
+                                )
+                            }
+                        }
+                    }
+                }
+            }
+        }
+    }
+}
+
+@Composable
+private fun RefreshFailedLine() {
+    Text(
+        text = stringResource(R.string.rust_refresh_failed),
+        style = MaterialTheme.typography.bodySmall,
+        color = MaterialTheme.colorScheme.onSurfaceVariant,
+    )
+}

app/src/main/java/com/runicgateway/app/ui/rust/RustServerViewModel.kt

@@ -0,0 +1,268 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.ui.rust
+
+import androidx.lifecycle.SavedStateHandle
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.viewModelScope
+import com.runicgateway.app.data.api.dto.RustEventDto
+import com.runicgateway.app.data.api.dto.RustLeaderboardRowDto
+import com.runicgateway.app.data.api.dto.RustPresenceDto
+import com.runicgateway.app.data.api.dto.RustServerDto
+import com.runicgateway.app.data.api.dto.RustWipeDto
+import com.runicgateway.app.data.repository.RustRepository
+import com.runicgateway.app.ui.Polled
+import com.runicgateway.app.ui.UiState
+import com.runicgateway.app.ui.navigation.Routes
+import com.runicgateway.app.ui.refreshInto
+import com.runicgateway.app.ui.toUiState
+import dagger.hilt.android.lifecycle.HiltViewModel
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.StateFlow
+import kotlinx.coroutines.flow.asStateFlow
+import kotlinx.coroutines.flow.update
+import kotlinx.coroutines.launch
+import javax.inject.Inject
+
+/** The four sections of a server's page (D13). */
+enum class RustTab { FEED, LEADERBOARD, ONLINE, WIPES }
+
+/** What a leaderboard column sorts by — the API's own vocabulary, not the app's. */
+object RustSort {
+    const val KILLS = "kills"
+    const val DEATHS = "deaths"
+    const val NPC_KILLS = "npcKills"
+    const val PLAYTIME = "playtime"
+}
+
+/**
+ * Everything one server's page is showing.
+ *
+ * One state object rather than eight flows: every panel on the page is about the
+ * same server and the same selected wipe, and a screen that collected them
+ * separately could render a leaderboard for one wipe beside a feed for another
+ * for a frame.
+ */
+data class RustServerUi(
+    val serverId: String = "",
+    val server: Polled<RustServerDto> = Polled(),
+    val tab: RustTab = RustTab.FEED,
+    val filterId: String = "all",
+    val sort: String = RustSort.KILLS,
+    /** The wipe every panel is filtered to. **Null is all time**, not "unknown". */
+    val selectedWipe: String? = null,
+    val feed: Polled<List<RustEventDto>> = Polled(),
+    val online: Polled<List<RustPresenceDto>> = Polled(),
+    val leaderboard: UiState<List<RustLeaderboardRowDto>> = UiState.Loading,
+    val wipes: UiState<List<RustWipeDto>> = UiState.Loading,
+)
+
+/**
+ * One Rust server (PLAN.md §9 M14; `docs/modules/rust/PLAN.md` D13, D14).
+ *
+ * ## What polls and what does not
+ *
+ * D14, and it is a statement about the questions rather than about cost: the
+ * **feed**, **who is on** and the **server's own line** change while somebody is
+ * looking at the page, and the **leaderboard** and the **wipe list** do not in
+ * any way a reader would want to watch. A leaderboard that re-sorted itself under
+ * a finger every twenty seconds would be worse than a stale one.
+ *
+ * Only the **visible** live panel is polled. The website can afford to mount the
+ * one tab it is showing; here the tabs are one screen, so the refresh asks what
+ * the reader is actually looking at.
+ *
+ * ## Changing the question versus asking it again
+ *
+ * A poll is the same question asked again, so it keeps what is on screen
+ * ([refreshInto]). Changing the filter, the sort or the wipe is a **different
+ * question**, so the panel blanks and loads — what is there is an answer to
+ * something the reader has stopped asking, and leaving it up while the new one
+ * arrives would show a killfeed for last wipe under a heading naming this one.
+ */
+@HiltViewModel
+class RustServerViewModel @Inject constructor(
+    private val repository: RustRepository,
+    savedStateHandle: SavedStateHandle,
+) : ViewModel() {
+
+    private val serverId: String = savedStateHandle[Routes.Args.SERVER_ID] ?: ""
+
+    private val _state = MutableStateFlow(RustServerUi(serverId = serverId))
+    val state: StateFlow<RustServerUi> = _state.asStateFlow()
+
+    init {
+        load()
+    }
+
+    /** A first load or a retry of the whole page. */
+    fun load() {
+        _state.update { it.copy(server = Polled(UiState.Loading), feed = Polled(UiState.Loading)) }
+        viewModelScope.launch {
+            askServer()
+            askFeed()
+        }
+    }
+
+    /**
+     * The poll tick.
+     *
+     * The server line always, and then whichever live panel is on screen. A tab
+     * showing the leaderboard or the wipes does no extra work — the reader is
+     * looking at something that does not move.
+     */
+    fun refresh() {
+        viewModelScope.launch {
+            askServer()
+            when (_state.value.tab) {
+                RustTab.FEED -> askFeed()
+                RustTab.ONLINE -> askOnline()
+                RustTab.LEADERBOARD, RustTab.WIPES -> Unit
+            }
+        }
+    }
+
+    /**
+     * Open a tab, loading its panel the first time it is opened.
+     *
+     * The two that do not poll are loaded exactly once per question: re-asking on
+     * every tab switch would put a spinner over a leaderboard the reader has
+     * already read, for an answer that cannot have changed while they were three
+     * taps away.
+     */
+    fun selectTab(tab: RustTab) {
+        val already = _state.value
+        _state.update { it.copy(tab = tab) }
+
+        viewModelScope.launch {
+            when (tab) {
+                RustTab.FEED -> if (already.feed.state !is UiState.Success) askFeed()
+                RustTab.ONLINE -> if (already.online.state !is UiState.Success) askOnline()
+                RustTab.LEADERBOARD -> if (already.leaderboard !is UiState.Success) askLeaderboard()
+                RustTab.WIPES -> if (already.wipes !is UiState.Success) askWipes()
+            }
+        }
+    }
+
+    /** A different question for the feed: blank it and ask. */
+    fun selectFilter(filterId: String) {
+        if (filterId == _state.value.filterId) return
+        _state.update { it.copy(filterId = filterId, feed = Polled(UiState.Loading)) }
+        viewModelScope.launch { askFeed() }
+    }
+
+    /** A different question for the leaderboard: blank it and ask. */
+    fun selectSort(sort: String) {
+        if (sort == _state.value.sort) return
+        _state.update { it.copy(sort = sort, leaderboard = UiState.Loading) }
+        viewModelScope.launch { askLeaderboard() }
+    }
+
+    /**
+     * Pick a wipe, or all time with null.
+     *
+     * It is the one selection that changes **two** panels, so both are blanked —
+     * and only the loaded ones are re-asked, so choosing a wipe from the Wipes tab
+     * does not fetch a leaderboard nobody has opened.
+     */
+    fun selectWipe(wipeId: String?) {
+        if (wipeId == _state.value.selectedWipe) return
+
+        val hadLeaderboard = _state.value.leaderboard is UiState.Success
+        _state.update {
+            it.copy(
+                selectedWipe = wipeId,
+                feed = Polled(UiState.Loading),
+                leaderboard = if (hadLeaderboard) UiState.Loading else it.leaderboard,
+            )
+        }
+
+        viewModelScope.launch {
+            askFeed()
+            if (hadLeaderboard) askLeaderboard()
+        }
+    }
+
+    /**
+     * Pick a wipe from the Wipes tab, which is a navigation as much as a filter.
+     *
+     * The question it asks is "what happened during that map", and the answer is
+     * the feed — so it lands there rather than leaving the reader on a list of
+     * dates with nothing visibly changed.
+     */
+    fun openWipe(wipeId: String) {
+        selectWipe(wipeId)
+        selectTab(RustTab.FEED)
+    }
+
+    /**
+     * Retry one panel after its own load failed.
+     *
+     * Four entry points rather than one, because a failed leaderboard is not a
+     * reason to re-read the feed the reader can already see — and [load] is the
+     * whole page, which is right for a failed *server* read and heavy-handed for
+     * anything else.
+     */
+    fun retryFeed() {
+        _state.update { it.copy(feed = Polled(UiState.Loading)) }
+        viewModelScope.launch { askFeed() }
+    }
+
+    fun retryLeaderboard() {
+        _state.update { it.copy(leaderboard = UiState.Loading) }
+        viewModelScope.launch { askLeaderboard() }
+    }
+
+    fun retryOnline() {
+        _state.update { it.copy(online = Polled(UiState.Loading)) }
+        viewModelScope.launch { askOnline() }
+    }
+
+    fun retryWipes() {
+        _state.update { it.copy(wipes = UiState.Loading) }
+        viewModelScope.launch { askWipes() }
+    }
+
+    private suspend fun askServer() {
+        val result = repository.server(serverId)
+        _state.update { it.copy(server = refreshInto(it.server.state, result)) }
+    }
+
+    private suspend fun askFeed() {
+        val current = _state.value
+        val result = repository.events(
+            id = serverId,
+            kinds = kindsFor(current.filterId),
+            wipe = current.selectedWipe,
+            limit = FEED_LIMIT,
+        )
+        _state.update { it.copy(feed = refreshInto(it.feed.state, result)) }
+    }
+
+    private suspend fun askOnline() {
+        val result = repository.online(serverId)
+        _state.update { it.copy(online = refreshInto(it.online.state, result)) }
+    }
+
+    private suspend fun askLeaderboard() {
+        val current = _state.value
+        val result = repository.leaderboard(
+            id = serverId,
+            wipe = current.selectedWipe,
+            sort = current.sort,
+            limit = LEADERBOARD_LIMIT,
+        )
+        _state.update { it.copy(leaderboard = result.toUiState()) }
+    }
+
+    private suspend fun askWipes() {
+        _state.update { it.copy(wipes = repository.wipes(serverId).toUiState()) }
+    }
+
+    private companion object {
+        /** Matches the website's feed page size; the server caps at 200 regardless. */
+        const val FEED_LIMIT = 100
+        const val LEADERBOARD_LIMIT = 50
+    }
+}

app/src/main/java/com/runicgateway/app/ui/rust/RustServersScreen.kt

@@ -0,0 +1,191 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.ui.rust
+
+import androidx.compose.foundation.clickable
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.PaddingValues
+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.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.RustServerDto
+import com.runicgateway.app.ui.PollWhileResumed
+import com.runicgateway.app.ui.UiState
+import com.runicgateway.app.ui.components.EmptyView
+import com.runicgateway.app.ui.components.ErrorView
+import com.runicgateway.app.ui.components.LoadingView
+import com.runicgateway.app.ui.components.PillTone
+import com.runicgateway.app.ui.components.ShardCard
+import com.runicgateway.app.ui.components.StatusPill
+
+/**
+ * Every Rust server this site follows — the module's landing page (D8, D12).
+ *
+ * **The phase criterion is this screen with every server off.** Nothing here is a
+ * live call to a game host: the website answers from its own tables, so a fleet
+ * that has been down for a week renders a week of last-known state rather than an
+ * error. The one thing that can fail is the website itself.
+ */
+@Composable
+fun RustServersScreen(
+    onOpenServer: (String) -> Unit,
+    modifier: Modifier = Modifier,
+    viewModel: RustServersViewModel = hiltViewModel(),
+) {
+    val polled by viewModel.state.collectAsStateWithLifecycle()
+
+    PollWhileResumed { viewModel.refresh() }
+
+    when (val s = polled.state) {
+        is UiState.Loading -> LoadingView(modifier)
+        is UiState.Error -> ErrorView(s.kind, onRetry = viewModel::load, modifier = modifier)
+        is UiState.Success -> {
+            if (s.data.isEmpty()) {
+                EmptyView(stringResource(R.string.rust_servers_empty), modifier)
+            } else {
+                ServerList(s.data, polled.refreshFailed, onOpenServer, modifier)
+            }
+        }
+    }
+}
+
+@Composable
+private fun ServerList(
+    servers: List<RustServerDto>,
+    refreshFailed: Boolean,
+    onOpenServer: (String) -> Unit,
+    modifier: Modifier = Modifier,
+) {
+    LazyColumn(
+        modifier = modifier.fillMaxSize(),
+        contentPadding = PaddingValues(16.dp),
+        verticalArrangement = Arrangement.spacedBy(12.dp),
+    ) {
+        // A failed refresh says so and changes nothing else. The rows below it are
+        // the last good answer and stay exactly as they were — blanking them is
+        // the one thing a site whose premise is "it renders while the game is off"
+        // must not do when a request fails.
+        if (refreshFailed) {
+            item {
+                Text(
+                    text = stringResource(R.string.rust_refresh_failed),
+                    style = MaterialTheme.typography.bodySmall,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                )
+            }
+        }
+
+        items(servers, key = { it.id }) { server ->
+            ServerRow(server) { onOpenServer(server.id) }
+        }
+    }
+}
+
+@Composable
+private fun ServerRow(server: RustServerDto, onOpen: () -> Unit) {
+    ShardCard(modifier = Modifier.fillMaxWidth().clickable(onClick = onOpen)) {
+        // `ShardCard` is the themed Card and nothing more — it carries no padding
+        // of its own, so every caller pads its own content. Without this the text
+        // sits flush against the card's edge and the first glyph of each line
+        // reads as clipped, which is what the walk saw.
+        Column(Modifier.padding(16.dp)) {
+        Row(
+            modifier = Modifier.fillMaxWidth(),
+            horizontalArrangement = Arrangement.SpaceBetween,
+            verticalAlignment = Alignment.CenterVertically,
+        ) {
+            Text(
+                text = server.name.ifBlank { server.id },
+                style = MaterialTheme.typography.titleMedium,
+                modifier = Modifier.weight(1f),
+            )
+            // `online` already has staleness folded into it server-side — a row
+            // nobody has written recently cannot claim a server is up — so this
+            // renders the field rather than second-guessing it.
+            if (server.online) {
+                StatusPill(
+                    text = stringResource(
+                        R.string.rust_online_count,
+                        server.players,
+                        server.maxPlayers,
+                    ),
+                    tone = PillTone.Success,
+                )
+            } else {
+                StatusPill(text = stringResource(R.string.rust_offline), tone = PillTone.Neutral)
+            }
+        }
+
+        val world = describeWorld(server)
+        if (world != null) {
+            Text(
+                text = world,
+                style = MaterialTheme.typography.bodySmall,
+                color = MaterialTheme.colorScheme.onSurfaceVariant,
+                modifier = Modifier.padding(top = 4.dp),
+            )
+        }
+
+        Text(
+            text = lastReported(server),
+            style = MaterialTheme.typography.bodySmall,
+            color = MaterialTheme.colorScheme.onSurfaceVariant,
+            modifier = Modifier.padding(top = 2.dp),
+        )
+        }
+    }
+}
+
+/**
+ * The world line — the things a Rust player asks first.
+ *
+ * Null when the server has never described itself, so the caller leaves the line
+ * out rather than printing an empty one. A server configured this morning that
+ * has not connected yet is in exactly that state, and it is not an error.
+ */
+@Composable
+internal fun describeWorld(server: RustServerDto): String? {
+    val parts = listOfNotNull(
+        server.level,
+        server.worldSize?.let { stringResource(R.string.rust_world_size, it) },
+        server.seed?.let { stringResource(R.string.rust_world_seed, it) },
+        wipeDay(server.wipedAt)?.let { stringResource(R.string.rust_wiped_on, it) },
+    )
+    return parts.takeIf { it.isNotEmpty() }?.joinToString(" · ")
+}
+
+/**
+ * "last reported 3 minutes ago".
+ *
+ * **Reads `lastSeenAt` and never `updatedAt`.** The module shipped that exact
+ * confusion and fixed it in phase 4: `updatedAt` moves on every poll including a
+ * failed one, so an offline server claimed it had just checked in, every thirty
+ * seconds, for as long as it stayed down. Only a frame moves `lastSeenAt`.
+ */
+@Composable
+internal fun lastReported(server: RustServerDto): String {
+    val ago = rustAgo(server.lastSeenAt)
+        ?: return stringResource(R.string.rust_never_reported)
+
+    return if (server.stale) {
+        stringResource(R.string.rust_last_reported_stale, ago)
+    } else {
+        stringResource(R.string.rust_last_reported, ago)
+    }
+}

app/src/main/java/com/runicgateway/app/ui/rust/RustServersViewModel.kt

@@ -0,0 +1,56 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.ui.rust
+
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.viewModelScope
+import com.runicgateway.app.data.api.dto.RustServerDto
+import com.runicgateway.app.data.repository.RustRepository
+import com.runicgateway.app.ui.Polled
+import com.runicgateway.app.ui.UiState
+import com.runicgateway.app.ui.refreshInto
+import dagger.hilt.android.lifecycle.HiltViewModel
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.StateFlow
+import kotlinx.coroutines.flow.asStateFlow
+import kotlinx.coroutines.launch
+import javax.inject.Inject
+
+/**
+ * The Rust server list — the module's landing page, one tier along (PLAN.md §9
+ * M14; `docs/modules/rust/PLAN.md` D12).
+ *
+ * **`toUiState`, not `toShardUiState`.** These routes carry no `requireFeature`
+ * gate, so a `404` here is a genuinely missing thing and never an admin's
+ * visibility switch. Offering "this shard doesn't publish it" for one would name
+ * a cause that does not exist on this surface.
+ *
+ * [refresh] is what the screen's poll calls and [load] is what a retry calls, and
+ * the difference is the whole of [refreshInto]: a refresh keeps the rows when it
+ * fails, a load is allowed to blank them because there is nothing on screen to
+ * protect.
+ */
+@HiltViewModel
+class RustServersViewModel @Inject constructor(
+    private val repository: RustRepository,
+) : ViewModel() {
+
+    private val _state = MutableStateFlow(Polled<List<RustServerDto>>())
+    val state: StateFlow<Polled<List<RustServerDto>>> = _state.asStateFlow()
+
+    /** A first load or a retry: show the spinner, then replace whatever comes back. */
+    fun load() {
+        _state.value = Polled(UiState.Loading)
+        viewModelScope.launch { ask() }
+    }
+
+    /** A poll: silent on success, and it keeps the rows on failure. */
+    fun refresh() {
+        viewModelScope.launch { ask() }
+    }
+
+    private suspend fun ask() {
+        _state.value = refreshInto(_state.value.state, repository.servers())
+    }
+}

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

@@ -10,6 +10,8 @@ import com.runicgateway.app.core.auth.SessionManager
 import com.runicgateway.app.data.repository.AuthRepository
 import com.runicgateway.app.data.repository.ShardFeatures
 import com.runicgateway.app.data.repository.ShardFeaturesRepository
+import com.runicgateway.app.data.repository.SiteCapabilities
+import com.runicgateway.app.data.repository.SiteCapabilitiesRepository
 import dagger.hilt.android.lifecycle.HiltViewModel
 import kotlinx.coroutines.flow.StateFlow
 import kotlinx.coroutines.launch
@@ -26,6 +28,7 @@ class SessionViewModel @Inject constructor(
     sessionManager: SessionManager,
     private val authRepository: AuthRepository,
     shardFeaturesRepository: ShardFeaturesRepository,
+    siteCapabilitiesRepository: SiteCapabilitiesRepository,
 ) : ViewModel() {
 
     val session: StateFlow<Session> = sessionManager.state
@@ -38,6 +41,19 @@ class SessionViewModel @Inject constructor(
      */
     val shardFeatures: StateFlow<ShardFeatures?> = shardFeaturesRepository.features
 
+    /**
+     * What this BACKEND serves — core's capabilities and every installed module's
+     * (M13). Exposed here for the reason [shardFeatures] is: the shared menu is
+     * the consumer, and a row is filtered by both.
+     *
+     * **Read-only here, and deliberately not refreshed here.** This answer is per
+     * HOST, not per viewer: signing in does not install a module. It is resolved
+     * beside the appearance in [com.runicgateway.app.ui.AppViewModel], which is
+     * what owns the host's lifecycle — first load, resume, and the Settings →
+     * Server switch that invalidates it.
+     */
+    val capabilities: StateFlow<SiteCapabilities?> = siteCapabilitiesRepository.capabilities
+
     init {
         // The answer is per-viewer, so it is re-resolved on every session change.
         // A StateFlow conflates equal values, so a resume revalidation that returns

app/src/main/res/values/strings.xml

@@ -41,8 +41,10 @@
     <string name="nav_opens_in_browser">Opens in your browser</string>
     <string name="menu_home">Home</string>
     <string name="menu_news">News</string>
+    <string name="menu_events">Events</string>
     <string name="menu_wiki">Wiki</string>
     <string name="menu_shard">Shard</string>
+    <string name="menu_rust">Rust servers</string>
     <string name="menu_rules">Rules</string>
     <string name="menu_atlas">Atlas</string>
     <string name="menu_leaderboards">Leaderboards</string>
@@ -50,6 +52,7 @@
     <string name="menu_about">About</string>
     <string name="menu_contact">Contact</string>
     <string name="menu_account">My account</string>
+    <string name="menu_my_events">My events</string>
     <string name="menu_my_characters">My characters</string>
     <string name="menu_my_vendors">My vendors</string>
     <string name="menu_my_houses">My houses</string>
@@ -484,7 +487,7 @@
     <!-- ── Push notifications (§11, M7 Part 2) ─────────────────────────── -->
     <string name="menu_notifications">Notifications</string>
     <string name="notifications_title">Notifications</string>
-    <string name="notifications_subtitle">Choose what this shard notifies you about. Nothing is sent unless you turn it on.</string>
+    <string name="notifications_subtitle">Choose what this shard notifies you about, and how it reaches you. Nothing is sent unless you turn it on.</string>
     <string name="notifications_section_general">General</string>
     <string name="notifications_section_personal">Your game account</string>
     <string name="notifications_requires_link">Link a game account to enable this.</string>
@@ -495,6 +498,18 @@
     <string name="notifications_save_error">Couldn\'t save your notification settings. Try again.</string>
     <string name="notifications_relay_error">This shard\'s push relay isn\'t reachable right now.</string>
 
+    <!-- The in-app inbox and the per-channel settings (ENGAGEMENT.md phase 8). -->
+    <string name="notifications_mode_off">Off</string>
+    <string name="notifications_mode_instant">As it happens</string>
+    <string name="notifications_mode_digest">Daily summary</string>
+    <string name="inbox_empty">Nothing here yet. Notifications you\'re sent will show up here.</string>
+    <string name="inbox_all_read">All caught up</string>
+    <string name="inbox_unread_count">%1$d unread</string>
+    <string name="inbox_mark_all_read">Mark all read</string>
+    <string name="inbox_open_settings">Notification settings</string>
+    <string name="inbox_loading_more">Loading more…</string>
+    <string name="inbox_offline_cached">Offline — showing what was saved on this device.</string>
+
     <!-- Notification channels + the ongoing foreground-service notification. -->
     <string name="push_channel_messages">Shard notifications</string>
     <string name="push_channel_messages_desc">Alerts you opted into from this shard.</string>
@@ -513,4 +528,81 @@
     <string name="push_stream_house_idoc">Your house entered IDOC</string>
     <string name="push_stream_account_login">Login to your account</string>
     <string name="push_stream_generic">New notification</string>
+
+    <!-- ── Events (§9 M13, EVENTS.md §I) ─────────────────────────── -->
+    <!--
+      The four status words. `cancelled` has TWO, chosen by the clock rather than
+      the status: "did not happen" is right for a past occurrence and false for a
+      future one, and a run four days out that an operator called off is the common
+      case. See EventTimes.statusWordRes.
+    -->
+    <string name="events_status_live">Happening now</string>
+    <string name="events_status_scheduled">Scheduled</string>
+    <string name="events_status_completed">Finished</string>
+    <string name="events_status_cancelled">Cancelled</string>
+    <string name="events_status_did_not_happen">Did not happen</string>
+
+    <string name="events_empty">Nothing on the calendar just yet — check back soon.</string>
+    <!-- A forecast past the materialisation horizon: nothing is committed to it. -->
+    <string name="events_projected">Expected — not yet confirmed</string>
+    <string name="events_truncated">Showing the first part of a busy calendar.</string>
+
+    <string name="events_part_of">Part of %1$s</string>
+    <string name="events_next">Next</string>
+    <string name="events_under_way">Under way</string>
+    <string name="events_nothing_scheduled">Nothing scheduled at the moment.</string>
+    <string name="events_never_scheduled">This event has not been scheduled yet.</string>
+    <string name="events_coming_up">Coming up</string>
+    <string name="events_previously">Previously</string>
+    <string name="events_results">Results</string>
+    <string name="events_results_nobody">Results were published with nobody recorded.</string>
+    <!-- A module puts a display name in its participation meta or it does not; the
+         member key is never published, so there is nothing else to render. -->
+    <string name="events_participant_unnamed">Unnamed</string>
+
+    <string name="events_history_empty">You have not taken part in an event yet.</string>
+    <string name="events_rank">Rank %1$d</string>
+    <!-- Not a dash: an unranked row is a real state, not a missing value. -->
+    <string name="events_results_unpublished">Results not published</string>
+    <string name="events_score">Score %1$s</string>
+    <string name="events_show_more">Show more</string>
+    <string name="events_loading">Loading…</string>
+
+    <!-- Rust module (M14, docs/modules/rust/PLAN.md §18) -->
+    <string name="rust_servers_empty">No Rust servers are configured on this site yet.</string>
+    <string name="rust_offline">Offline</string>
+    <string name="rust_online_count">%1$d / %2$d online</string>
+    <string name="rust_never_reported">has never reported</string>
+    <string name="rust_last_reported">last reported %1$s</string>
+    <string name="rust_last_reported_stale">last reported %1$s — out of date, so it is shown as offline</string>
+    <string name="rust_world_size">size %1$d</string>
+    <string name="rust_world_seed">seed %1$d</string>
+    <string name="rust_wiped_on">wiped %1$s</string>
+    <string name="rust_refresh_failed">Could not refresh just now. This is the last thing the site heard.</string>
+    <string name="rust_no_such_server">No such server</string>
+    <string name="rust_no_such_server_detail">This address does not name a server this site follows.</string>
+    <string name="rust_back_to_servers">Back to the server list</string>
+    <string name="rust_tab_feed">Feed</string>
+    <string name="rust_tab_leaderboard">Leaderboard</string>
+    <string name="rust_tab_online">Online</string>
+    <string name="rust_tab_wipes">Wipes</string>
+    <string name="rust_all_time">All time</string>
+    <string name="rust_wipe_current">%1$s (this wipe)</string>
+    <string name="rust_wipe_this_one">Current</string>
+    <string name="rust_wipe_selected">Showing</string>
+    <string name="rust_feed_empty">Nothing has happened on this server yet — or not during the wipe you are looking at.</string>
+    <string name="rust_leaderboard_empty">Nobody has scored here yet.</string>
+    <string name="rust_wipes_empty">This server has not reported a wipe yet.</string>
+    <string name="rust_nobody_on">The server is up and the island is empty. Somebody has to be first.</string>
+    <string name="rust_presence_offline">Presence is the one thing on this page that cannot be answered from the record — it is who is connected now, and nothing is.</string>
+    <string name="rust_presence_live">On the server right now.</string>
+    <string name="rust_presence_last_known">The last board this server sent. It is offline, so this is who was on then — not who is on now.</string>
+    <string name="rust_sleeping">Sleeping</string>
+    <string name="rust_col_player">Player</string>
+    <string name="rust_col_kills">Kills</string>
+    <string name="rust_col_deaths">Deaths</string>
+    <string name="rust_col_npc_kills">NPC</string>
+    <string name="rust_col_structures">Built</string>
+    <string name="rust_col_played">Played</string>
+    <string name="rust_online_badge">%1$d players online</string>
 </resources>

app/src/test/java/com/runicgateway/app/data/api/dto/NotificationsDtoTest.kt

@@ -82,4 +82,71 @@ class NotificationsDtoTest {
         )
         assertNull(dto.push.ntfyUrl)
     }
+
+    // ── The inbox + per-channel prefs (ENGAGEMENT.md phases 3, 7/8) ────────
+
+    @Test fun inboxPageDecodesWithItsUnreadCount() {
+        val dto = json.decodeFromString<NotificationInboxDto>(
+            """{"items":[{"id":42,"triggerId":"team.post.created","title":"New post",
+                 "body":"Someone posted in your team.","url":"https://shard.example/teams/1",
+                 "read":false,"readAt":null,"createdAt":"2026-08-31T12:30:00.000Z"}],
+                 "hasMore":true,"unread":3}""",
+        )
+        assertEquals(1, dto.items.size)
+        assertEquals(42L, dto.items.first().id)
+        assertEquals("team.post.created", dto.items.first().triggerId)
+        assertFalse(dto.items.first().read)
+        assertTrue(dto.hasMore)
+        // The whole inbox, not the page — the badge and the list come from one response.
+        assertEquals(3, dto.unread)
+    }
+
+    @Test fun anItemWithNoBodyOrUrlDecodes() {
+        // Most items have neither: an inbox row is complete on its own.
+        val dto = json.decodeFromString<NotificationItemDto>(
+            """{"id":7,"triggerId":"news.post","title":"Patch notes","body":null,"url":null,
+                "read":true,"readAt":"2026-08-31T13:00:00.000Z","createdAt":"2026-08-31T12:30:00.000Z"}""",
+        )
+        assertNull(dto.body)
+        assertNull(dto.url)
+        assertTrue(dto.read)
+    }
+
+    @Test fun channelPrefsDecodeTheirModesAndPerItemChannels() {
+        val dto = json.decodeFromString<NotificationChannelPrefsDto>(
+            """{"channels":[
+                 {"id":"push","label":"Push","carriesContent":false,"defaultMode":"off",
+                  "supportsDigest":false,"modes":["off","instant"]},
+                 {"id":"email","label":"Email","carriesContent":true,"defaultMode":"off",
+                  "supportsDigest":true,"modes":["off","instant","digest"]}],
+               "items":[
+                 {"id":"uo.house.idoc_warning","label":"House in danger","description":"",
+                  "personal":true,"requiresLinkedAccount":true,"ceiling":"authenticated",
+                  "channels":["email","inapp"],"modes":{"email":"digest","inapp":"instant"}}]}""",
+        )
+        assertFalse(dto.channels.first { it.id == "push" }.carriesContent)
+        assertTrue(dto.channels.first { it.id == "email" }.supportsDigest)
+        val item = dto.items.single()
+        // A trigger-only id carries no push facet at all — the UI renders controls
+        // from THIS list, never from a hardcoded three.
+        assertFalse(item.channels.contains("push"))
+        assertEquals("digest", item.modes["email"])
+        assertNull(item.modes["push"])
+    }
+
+    @Test fun theSparseUpdateAlwaysCarriesItsPrefsField() {
+        // Same reasoning as the subscriptions DTO: kotlinx omits a property equal
+        // to its default, and the validator requires the field.
+        val body = json.encodeToString(NotificationChannelPrefsUpdateDto(emptyList()))
+        assertEquals("""{"prefs":[]}""", body)
+    }
+
+    @Test fun theSparseUpdateSendsOnlyThePairItNames() {
+        val body = json.encodeToString(
+            NotificationChannelPrefsUpdateDto(
+                listOf(NotificationChannelPrefDto(id = "news.post", channel = "email", mode = "digest")),
+            ),
+        )
+        assertEquals("""{"prefs":[{"id":"news.post","channel":"email","mode":"digest"}]}""", body)
+    }
 }

app/src/test/java/com/runicgateway/app/data/api/fake/FakeEventsApi.kt

@@ -0,0 +1,60 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.data.api.fake
+
+import com.runicgateway.app.data.api.EventsApi
+import com.runicgateway.app.data.api.dto.EventCalendarDto
+import com.runicgateway.app.data.api.dto.EventHistoryDto
+import com.runicgateway.app.data.api.dto.EventSeriesResponse
+import com.runicgateway.app.data.api.dto.PublicEventResponse
+
+/**
+ * A configurable fake of [EventsApi] (M13). Set the `var` a call should answer
+ * with; set [error] to make every call throw.
+ *
+ * [lastRun] and [lastBefore] are what the tests that matter assert on: the run a
+ * page was asked about, and the keyset cursor a history page walked back from.
+ */
+class FakeEventsApi : EventsApi {
+
+    var error: Throwable? = null
+
+    var calendar: EventCalendarDto = EventCalendarDto()
+    var event: PublicEventResponse = PublicEventResponse()
+    var series: EventSeriesResponse = EventSeriesResponse()
+    var history: EventHistoryDto = EventHistoryDto()
+
+    /** The `run` the last event read carried, so a test can assert a blank was dropped. */
+    var lastRun: String? = null
+    var lastSlug: String? = null
+
+    /** The keyset cursor the last history page asked for; null on a first page. */
+    var lastBefore: Long? = null
+    var historyCalls: Int = 0
+
+    private fun <T> reply(value: T): T {
+        error?.let { throw it }
+        return value
+    }
+
+    override suspend fun getCalendar(from: String?, to: String?, seriesId: Long?): EventCalendarDto =
+        reply(calendar)
+
+    override suspend fun getEvent(slug: String, run: String?): PublicEventResponse {
+        lastSlug = slug
+        lastRun = run
+        return reply(event)
+    }
+
+    override suspend fun getSeries(slug: String): EventSeriesResponse {
+        lastSlug = slug
+        return reply(series)
+    }
+
+    override suspend fun getHistory(limit: Int?, before: Long?): EventHistoryDto {
+        historyCalls++
+        lastBefore = before
+        return reply(history)
+    }
+}

app/src/test/java/com/runicgateway/app/data/api/fake/FakeNotificationsApi.kt

@@ -0,0 +1,106 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.data.api.fake
+
+import com.runicgateway.app.data.api.NotificationsApi
+import com.runicgateway.app.data.api.dto.NotificationChannelPrefDto
+import com.runicgateway.app.data.api.dto.NotificationChannelPrefsDto
+import com.runicgateway.app.data.api.dto.NotificationChannelPrefsUpdateDto
+import com.runicgateway.app.data.api.dto.NotificationInboxDto
+import com.runicgateway.app.data.api.dto.NotificationReadResultDto
+import com.runicgateway.app.data.api.dto.NotificationStreamsDto
+import com.runicgateway.app.data.api.dto.NotificationSubscriptionsDto
+import com.runicgateway.app.data.api.dto.NotificationUnreadDto
+import com.runicgateway.app.data.api.dto.PushDeviceDto
+import com.runicgateway.app.data.api.dto.RegisterDeviceRequest
+
+/**
+ * A configurable fake of [NotificationsApi] for the inbox and settings ViewModel
+ * tests. Read endpoints return their `var`; [error] makes every call throw, which
+ * is how the offline and server-error branches are driven.
+ *
+ * [pages] keys the inbox by its cursor — `null` is the first page — so a test can
+ * describe a two-page inbox without a callback, and [lastPrefsUpdate] records the
+ * body of the sparse PUT so a test can assert that ONE pair was sent.
+ */
+class FakeNotificationsApi : NotificationsApi {
+
+    var error: Throwable? = null
+
+    var streams: NotificationStreamsDto = NotificationStreamsDto()
+    var subscriptions: NotificationSubscriptionsDto = NotificationSubscriptionsDto(emptyList())
+    var channelPrefs: NotificationChannelPrefsDto = NotificationChannelPrefsDto()
+    var pages: Map<Long?, NotificationInboxDto> = mapOf(null to NotificationInboxDto())
+    var unread: NotificationUnreadDto = NotificationUnreadDto()
+    var readResult: NotificationReadResultDto = NotificationReadResultDto(ok = true)
+
+    var lastPrefsUpdate: List<NotificationChannelPrefDto>? = null
+    var markedRead: MutableList<Long> = mutableListOf()
+    var markAllReadCalls: Int = 0
+    var inboxCalls: MutableList<Long?> = mutableListOf()
+
+    private fun failIfSet() { error?.let { throw it } }
+
+    override suspend fun registerDevice(body: RegisterDeviceRequest): PushDeviceDto {
+        failIfSet()
+        return PushDeviceDto(id = 1)
+    }
+
+    override suspend fun listDevices(): List<PushDeviceDto> {
+        failIfSet()
+        return emptyList()
+    }
+
+    override suspend fun deleteDevice(id: Long) = failIfSet()
+
+    override suspend fun streams(): NotificationStreamsDto {
+        failIfSet()
+        return streams
+    }
+
+    override suspend fun subscriptions(): NotificationSubscriptionsDto {
+        failIfSet()
+        return subscriptions
+    }
+
+    override suspend fun putSubscriptions(body: NotificationSubscriptionsDto): NotificationSubscriptionsDto {
+        failIfSet()
+        subscriptions = body
+        return body
+    }
+
+    override suspend fun channelPrefs(): NotificationChannelPrefsDto {
+        failIfSet()
+        return channelPrefs
+    }
+
+    override suspend fun putChannelPrefs(body: NotificationChannelPrefsUpdateDto): NotificationChannelPrefsDto {
+        failIfSet()
+        lastPrefsUpdate = body.prefs
+        return channelPrefs
+    }
+
+    override suspend fun inbox(limit: Int?, before: Long?, unread: Boolean?): NotificationInboxDto {
+        failIfSet()
+        inboxCalls.add(before)
+        return pages[before] ?: NotificationInboxDto()
+    }
+
+    override suspend fun unreadCount(): NotificationUnreadDto {
+        failIfSet()
+        return unread
+    }
+
+    override suspend fun markRead(id: Long): NotificationReadResultDto {
+        failIfSet()
+        markedRead.add(id)
+        return readResult
+    }
+
+    override suspend fun markAllRead(): NotificationReadResultDto {
+        failIfSet()
+        markAllReadCalls++
+        return readResult
+    }
+}

app/src/test/java/com/runicgateway/app/data/api/fake/FakePublicApi.kt

@@ -13,6 +13,7 @@ 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.ModulesDto
 import com.runicgateway.app.data.api.dto.OnlineStaffDto
 import com.runicgateway.app.data.api.dto.PageDto
 import com.runicgateway.app.data.api.dto.PostDto
@@ -67,6 +68,19 @@ class FakePublicApi : PublicApi {
     var houses: List<HouseDto> = emptyList()
     var shardFeatures: ShardFeaturesDto = ShardFeaturesDto()
 
+    /**
+     * `GET /public/modules` (M13). Empty by default, which is a real answer: a
+     * backend serving no modules at all.
+     */
+    var modules: ModulesDto = ModulesDto()
+
+    /**
+     * Per-call failures, for the one thing [error] cannot express: capability
+     * resolution reads TWO routes and one failing is not the same as both.
+     */
+    var statusError: Throwable? = null
+    var modulesError: Throwable? = null
+
     // Protocol 3.0 content (M11). `ruleset` is nullable on the wire: null means the
     // shard has never published one, which is a success, not a failure.
     var ruleset: RulesetDto? = null
@@ -94,9 +108,17 @@ class FakePublicApi : PublicApi {
     }
 
     override suspend fun probeStatus(absoluteStatusUrl: String): StatusDto = reply(status)
-    override suspend fun getStatus(): StatusDto = reply(status)
+    override suspend fun getStatus(): StatusDto {
+        statusError?.let { throw it }
+        return reply(status)
+    }
     override suspend fun getSettings(): SettingsDto = reply(settings)
 
+    override suspend fun getModules(): ModulesDto {
+        modulesError?.let { throw it }
+        return reply(modules)
+    }
+
     override suspend fun getPosts(category: String): List<PostDto> = reply(posts)
     override suspend fun getPost(category: String, idOrSlug: String): PostDto = reply(post)
     override suspend fun getPage(slug: String): PageDto = reply(page)

app/src/test/java/com/runicgateway/app/data/api/fake/FakeRustApi.kt

@@ -0,0 +1,97 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.data.api.fake
+
+import com.runicgateway.app.data.api.RustApi
+import com.runicgateway.app.data.api.dto.RustEventListDto
+import com.runicgateway.app.data.api.dto.RustLeaderboardDto
+import com.runicgateway.app.data.api.dto.RustOnlineDto
+import com.runicgateway.app.data.api.dto.RustServerListDto
+import com.runicgateway.app.data.api.dto.RustServerResponse
+import com.runicgateway.app.data.api.dto.RustWipeListDto
+
+/**
+ * A configurable fake of [RustApi] (M14). Set the `var` a call should answer
+ * with; set [error] to make every call throw.
+ *
+ * **The `last…` fields are what the tests that matter assert on.** The module's
+ * own API has one rule nothing about a successful response can show: an absent
+ * query parameter must be **absent** rather than empty, because `?wipe=` asks for
+ * a wipe whose id is the empty string and answers nothing, with no error to
+ * notice. Recording what was asked is the only way to see that from here.
+ */
+class FakeRustApi : RustApi {
+
+    var error: Throwable? = null
+
+    var servers: RustServerListDto = RustServerListDto()
+    var server: RustServerResponse = RustServerResponse()
+    var events: RustEventListDto = RustEventListDto()
+    var leaderboard: RustLeaderboardDto = RustLeaderboardDto()
+    var wipes: RustWipeListDto = RustWipeListDto()
+    var online: RustOnlineDto = RustOnlineDto()
+
+    var serversCalls: Int = 0
+    var eventCalls: Int = 0
+    var leaderboardCalls: Int = 0
+    var onlineCalls: Int = 0
+    var wipeCalls: Int = 0
+
+    /** The `kind` the last feed read carried — null means it sent none at all. */
+    var lastKind: String? = null
+
+    /** The `wipe` the last feed read carried; null means all wipes. */
+    var lastFeedWipe: String? = null
+    var lastLeaderboardWipe: String? = null
+    var lastSort: String? = null
+    var lastId: String? = null
+
+    private fun <T> reply(value: T): T {
+        error?.let { throw it }
+        return value
+    }
+
+    override suspend fun getServers(): RustServerListDto {
+        serversCalls++
+        return reply(servers)
+    }
+
+    override suspend fun getServer(id: String): RustServerResponse {
+        lastId = id
+        return reply(server)
+    }
+
+    override suspend fun getEvents(id: String, kind: String?, wipe: String?, limit: Int?): RustEventListDto {
+        eventCalls++
+        lastId = id
+        lastKind = kind
+        lastFeedWipe = wipe
+        return reply(events)
+    }
+
+    override suspend fun getLeaderboard(
+        id: String,
+        wipe: String?,
+        sort: String?,
+        limit: Int?,
+    ): RustLeaderboardDto {
+        leaderboardCalls++
+        lastId = id
+        lastLeaderboardWipe = wipe
+        lastSort = sort
+        return reply(leaderboard)
+    }
+
+    override suspend fun getWipes(id: String): RustWipeListDto {
+        wipeCalls++
+        lastId = id
+        return reply(wipes)
+    }
+
+    override suspend fun getOnline(id: String): RustOnlineDto {
+        onlineCalls++
+        lastId = id
+        return reply(online)
+    }
+}

app/src/test/java/com/runicgateway/app/data/repository/SiteCapabilitiesRepositoryTest.kt

@@ -0,0 +1,160 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.data.repository
+
+import com.runicgateway.app.data.api.dto.InstalledModuleDto
+import com.runicgateway.app.data.api.dto.ModulesDto
+import com.runicgateway.app.data.api.dto.StatusDto
+import com.runicgateway.app.data.api.dto.VersionDto
+import com.runicgateway.app.data.api.fake.FakePublicApi
+import com.runicgateway.app.util.httpError
+import kotlinx.coroutines.test.runTest
+import org.junit.Assert.assertEquals
+import org.junit.Assert.assertFalse
+import org.junit.Assert.assertNotNull
+import org.junit.Assert.assertNull
+import org.junit.Assert.assertTrue
+import org.junit.Test
+import java.io.IOException
+
+/**
+ * What this backend serves, and — the point of the class — the three different
+ * things "we don't know" can mean (PLAN.md §9 M13).
+ *
+ * **Absence of an answer is not an answer of absence.** Before M13 the app
+ * collapsed a 404, a dead network and "no such module" into one `null` and
+ * treated all three as "show everything", which rendered five shard rows that
+ * each 404 on a site running a different game.
+ */
+class SiteCapabilitiesRepositoryTest {
+
+    private val api = FakePublicApi()
+    private val repository = SiteCapabilitiesRepository(api)
+
+    private fun serving(core: List<String>, moduleCaps: List<String>) {
+        api.status = StatusDto(version = VersionDto(capabilities = core))
+        api.modules = ModulesDto(
+            modules = listOf(InstalledModuleDto(id = "uo", capabilities = moduleCaps)),
+        )
+    }
+
+    @Test fun bothListsAreMergedAndStaySeparable() = runTest {
+        serving(core = listOf("events"), moduleCaps = listOf("shard", "atlas"))
+        repository.refresh()
+
+        val answer = repository.capabilities.value!!
+        assertEquals(setOf("events"), answer.core)
+        assertEquals(setOf("shard", "atlas"), answer.modules)
+        // A menu entry does not care which half serves it.
+        assertTrue("events" in answer)
+        assertTrue("shard" in answer)
+        assertFalse("market" in answer)
+    }
+
+    @Test fun aBackendWithNoModulesAnswersRatherThanFailing() = runTest {
+        api.status = StatusDto(version = VersionDto(capabilities = listOf("events")))
+        api.modules = ModulesDto(modules = emptyList())
+        repository.refresh()
+
+        val answer = repository.capabilities.value!!
+        assertTrue("events" in answer)
+        // The answer that hides the shard rows, and the whole reason for the class.
+        assertFalse("shard" in answer)
+        assertFalse(canUse(answer, Capability.SHARD))
+        assertTrue(canUse(answer, Capability.EVENTS))
+    }
+
+    @Test fun aBackendOlderThanEventsOmitsTheKeyAndThatIsAnAnswer() = runTest {
+        // No `capabilities` in the version block at all — the value is in what is
+        // absent, and it must not read as "unknown".
+        api.status = StatusDto(version = VersionDto(service = "runic-gateway"))
+        api.modules = ModulesDto(modules = listOf(InstalledModuleDto(id = "uo", capabilities = listOf("shard"))))
+        repository.refresh()
+
+        val answer = repository.capabilities.value!!
+        assertTrue(answer.core.isEmpty())
+        assertFalse(canUse(answer, Capability.EVENTS))
+        assertTrue(canUse(answer, Capability.SHARD))
+    }
+
+    // ── The three failure directions ─────────────────────────────────────
+
+    @Test fun aHostThatHasNeverAnsweredLeavesTheGateOpen() = runTest {
+        api.error = IOException("offline")
+        repository.refresh()
+
+        // Null, not empty. The drawer renders as it did before this existed rather
+        // than flickering its rows in on every cold start.
+        assertNull(repository.capabilities.value)
+        assertTrue(canUse(repository.capabilities.value, Capability.SHARD))
+        assertTrue(canUse(repository.capabilities.value, Capability.EVENTS))
+    }
+
+    @Test fun aFailedRefreshKeepsTheLastAnswer() = runTest {
+        serving(core = listOf("events"), moduleCaps = listOf("shard"))
+        repository.refresh()
+
+        api.error = IOException("offline")
+        repository.refresh()
+
+        // A moment with no connectivity is not an uninstall.
+        val answer = repository.capabilities.value!!
+        assertTrue("shard" in answer)
+        assertTrue("events" in answer)
+    }
+
+    @Test fun oneCallFailingKeepsThatHalfAndUpdatesTheOther() = runTest {
+        serving(core = listOf("events"), moduleCaps = listOf("shard"))
+        repository.refresh()
+
+        // The module list answers with the game module gone; the status call is down.
+        api.statusError = httpError(500)
+        api.modules = ModulesDto(modules = emptyList())
+        repository.refresh()
+
+        val answer = repository.capabilities.value!!
+        // The half that answered is believed…
+        assertFalse("shard" in answer)
+        // …and the half that did not keeps what it last said.
+        assertTrue("events" in answer)
+    }
+
+    @Test fun aFiveHundredOnTheModuleListIsNotAnEmptyList() = runTest {
+        serving(core = listOf("events"), moduleCaps = listOf("shard"))
+        repository.refresh()
+
+        // Core answers 500 for a module list read before its loader ran, precisely
+        // so a caller cannot read it as "no modules installed".
+        api.modulesError = httpError(500)
+        repository.refresh()
+
+        assertTrue("shard" in repository.capabilities.value!!)
+    }
+
+    @Test fun aServerSwitchDropsTheAnswerEntirely() = runTest {
+        serving(core = listOf("events"), moduleCaps = listOf("shard"))
+        repository.refresh()
+        assertNotNull(repository.capabilities.value)
+
+        repository.invalidate()
+
+        // Not "empty" — unknown. The new host has said nothing, and inheriting the
+        // old one's answer would hide its shard rows until its first read lands.
+        assertNull(repository.capabilities.value)
+        assertTrue(canUse(repository.capabilities.value, Capability.SHARD))
+    }
+
+    @Test fun twoModulesMayDeclareTheSameString() = runTest {
+        api.status = StatusDto()
+        api.modules = ModulesDto(
+            modules = listOf(
+                InstalledModuleDto(id = "uo", capabilities = listOf("shard")),
+                InstalledModuleDto(id = "other", capabilities = listOf("shard", "cards")),
+            ),
+        )
+        repository.refresh()
+
+        assertEquals(setOf("shard", "cards"), repository.capabilities.value!!.modules)
+    }
+}

app/src/test/java/com/runicgateway/app/ui/PollingTest.kt

@@ -0,0 +1,81 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.ui
+
+import com.runicgateway.app.core.result.ApiResult
+import org.junit.Assert.assertEquals
+import org.junit.Assert.assertFalse
+import org.junit.Assert.assertTrue
+import org.junit.Test
+
+/**
+ * The rule a poll lives on (M14, `docs/modules/rust/PLAN.md` D14).
+ *
+ * **A refresh is invisible when it succeeds and keeps the rows when it fails.**
+ * The site's whole premise is that it renders while the game is off, and an app
+ * that blanked itself the first time a request failed would break that one tier
+ * along from where it was built.
+ */
+class PollingTest {
+
+    @Test
+    fun `a successful refresh replaces the data and clears a previous failure`() {
+        val after = refreshInto(UiState.Success(listOf("old")), ApiResult.Ok(listOf("new")))
+
+        assertEquals(UiState.Success(listOf("new")), after.state)
+        assertFalse(after.refreshFailed)
+    }
+
+    @Test
+    fun `a failed refresh keeps the rows and reports the failure`() {
+        // The case this whole file exists for. Nothing is blanked, nothing is
+        // retried on the reader's behalf, and the failure is a fact the screen can
+        // render beside rows that are still the best answer anybody has.
+        val before = UiState.Success(listOf("old"))
+        val after = refreshInto(before, ApiResult.NetworkError(RuntimeException("offline")))
+
+        assertEquals(before, after.state)
+        assertTrue(after.refreshFailed)
+    }
+
+    @Test
+    fun `a failure with nothing on screen is an ordinary error`() {
+        // There is nothing to protect, so this is a first load that failed — and a
+        // screen that reported "could not refresh" over a blank page would be
+        // hiding the retry the reader needs.
+        val after = refreshInto(UiState.Loading, ApiResult.HttpError(500, "boom"))
+
+        assertTrue(after.state is UiState.Error)
+        assertFalse(after.refreshFailed)
+    }
+
+    @Test
+    fun `a 404 on a first load keeps its own kind`() {
+        val after = refreshInto(UiState.Loading, ApiResult.HttpError(404, "gone"))
+
+        assertEquals(UiState.Error(ErrorKind.NOT_FOUND, 404), after.state)
+    }
+
+    @Test
+    fun `a successful refresh over an error recovers`() {
+        val after = refreshInto(
+            UiState.Error(ErrorKind.NETWORK),
+            ApiResult.Ok(listOf("back")),
+        )
+
+        assertEquals(UiState.Success(listOf("back")), after.state)
+        assertFalse(after.refreshFailed)
+    }
+
+    @Test
+    fun `an empty answer is a success, not a failure to keep the old rows through`() {
+        // An empty list is an ANSWER — the feed filtered to a wipe nothing happened
+        // in, a fleet with nobody on it. Treating it as "nothing came back" and
+        // keeping stale rows would make an emptied board impossible to observe.
+        val after = refreshInto(UiState.Success(listOf("old")), ApiResult.Ok(emptyList<String>()))
+
+        assertEquals(UiState.Success(emptyList<String>()), after.state)
+        assertFalse(after.refreshFailed)
+    }
+}

app/src/test/java/com/runicgateway/app/ui/events/EventTimesTest.kt

@@ -0,0 +1,151 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.ui.events
+
+import com.runicgateway.app.R
+import org.junit.Assert.assertEquals
+import org.junit.Assert.assertNotEquals
+import org.junit.Assert.assertTrue
+import org.junit.Test
+import java.time.Instant
+import java.time.ZoneId
+import java.util.Locale
+
+/**
+ * Rendering an event's instant and its status word (EVENTS.md §I).
+ *
+ * Two of these are regression tests for defects the WEBSITE shipped and its live
+ * walk caught in events Phase 14a — restated in Kotlin because a rule that is
+ * only written down in another language gets re-derived wrong.
+ */
+class EventTimesTest {
+
+    private val uk = Locale.UK
+
+    // ── The zone split: the day is the reader's, the time is the event's ──
+
+    @Test fun theTimeIsTheEventsZoneNotTheReaders() {
+        // 2026-09-11T00:00Z is 20:00 the previous evening in New York. A shard's
+        // 8pm event is 8pm to everyone reading about it; rendering the reader's
+        // 02:00 would be true and useless.
+        assertEquals("20:00 New York", eventTime("2026-09-11T00:00:00Z", "America/New_York", uk))
+        assertEquals("02:00 Berlin", eventTime("2026-09-11T00:00:00Z", "Europe/Berlin", uk))
+    }
+
+    @Test fun theDayHeadingIsTheReadersOwn() {
+        // The same instant files under different days for two readers, which is the
+        // other half of the split: "what is on this month" is about the month the
+        // person holding the phone is living in.
+        val instant = "2026-09-11T00:30:00Z"
+        val london = readerDayLabel(instant, ZoneId.of("Europe/London"), uk)
+        val newYork = readerDayLabel(instant, ZoneId.of("America/New_York"), uk)
+        assertNotEquals(london, newYork)
+        assertTrue(london, london.contains("11"))
+        assertTrue(newYork, newYork.contains("10"))
+    }
+
+    @Test fun anUnknownZoneFallsBackToUtcRatherThanThrowing() {
+        // A typo in a definition's timezone column must still render.
+        assertEquals("00:00 Nowhere", eventTime("2026-09-11T00:00:00Z", "Mars/Nowhere", uk))
+        assertEquals("00:00 UTC", eventTime("2026-09-11T00:00:00Z", null, uk))
+    }
+
+    @Test fun aZonelessStampIsReadAsUtc() {
+        // MariaDB DATETIME read back as a string reaches the wire with no zone. It
+        // is what the server stored, so it is UTC — reading it as local time would
+        // shift every event by the device's offset.
+        assertEquals("00:00 UTC", eventTime("2026-09-11 00:00:00", "UTC", uk))
+    }
+
+    @Test fun anUnreadableInstantRendersNothingRatherThanCrashing() {
+        assertEquals("", eventTime("not a date", "UTC", uk))
+        assertEquals("", eventDateTime(null, "UTC", uk))
+        assertEquals("", readerDayLabel("", ZoneId.of("UTC"), uk))
+    }
+
+    @Test fun theZoneIsNamedAsAReaderRecognisesIt() {
+        assertEquals("New York", shortZone("America/New_York"))
+        assertEquals("Berlin", shortZone("Europe/Berlin"))
+        assertEquals("UTC", shortZone(null))
+        assertEquals("UTC", shortZone("  "))
+    }
+
+    // ── Scores are fractional, and the walk is why we know ───────────────
+
+    @Test fun aWholeScorePrintsWhole() {
+        // Most modules score by counting, and `12.0` reads as a rounding artefact.
+        assertEquals("1420", scoreText(1420.0, uk))
+        assertEquals("0", scoreText(0.0, uk))
+        assertEquals("-5", scoreText(-5.0, uk))
+    }
+
+    @Test fun aFractionalScoreKeepsItsDigits() {
+        // The live walk's first history row was 318.5. Declaring this field `Long`
+        // did not round it — kotlinx refused the whole body, and a 200 rendered as
+        // "Something went wrong on the server."
+        assertEquals("318.5", scoreText(318.5, uk))
+        assertEquals("0.25", scoreText(0.25, uk))
+        // DECIMAL(18,4): four places, and no trailing zeros past the last digit.
+        assertEquals("1.0625", scoreText(1.0625, uk))
+    }
+
+    @Test fun aNonFiniteScoreDoesNotReachTheScreen() {
+        assertEquals("0", scoreText(Double.NaN, uk))
+        assertEquals("0", scoreText(Double.POSITIVE_INFINITY, uk))
+    }
+
+    // ── The status word: the tense follows the CLOCK, not the status ──────
+
+    @Test fun aFutureCancellationReadsCancelled() {
+        // Phase 14a's own defect: the calendar told a visitor an event four days
+        // away "DID NOT HAPPEN". It had been cancelled, not missed.
+        val now = Instant.parse("2026-09-08T12:00:00Z")
+        assertEquals(
+            R.string.events_status_cancelled,
+            statusWordRes("cancelled", "2026-09-12T20:00:00Z", now),
+        )
+    }
+
+    @Test fun aPastCancellationReadsDidNotHappen() {
+        // Which is also the honest word for the `failed` and `missed` runs the
+        // server folds into `cancelled`.
+        val now = Instant.parse("2026-09-08T12:00:00Z")
+        assertEquals(
+            R.string.events_status_did_not_happen,
+            statusWordRes("cancelled", "2026-09-01T20:00:00Z", now),
+        )
+    }
+
+    @Test fun anUnreadableInstantOnACancellationReadsPast() {
+        val now = Instant.parse("2026-09-08T12:00:00Z")
+        assertEquals(
+            R.string.events_status_did_not_happen,
+            statusWordRes("cancelled", null, now),
+        )
+    }
+
+    @Test fun theOtherThreeStatusesDoNotDependOnTheClock() {
+        val past = Instant.parse("2027-01-01T00:00:00Z")
+        val future = Instant.parse("2020-01-01T00:00:00Z")
+        for (now in listOf(past, future)) {
+            assertEquals(R.string.events_status_live, statusWordRes("live", "2026-09-12T20:00:00Z", now))
+            assertEquals(R.string.events_status_completed, statusWordRes("completed", "2026-09-01T20:00:00Z", now))
+            assertEquals(R.string.events_status_scheduled, statusWordRes("scheduled", "2026-09-12T20:00:00Z", now))
+        }
+    }
+
+    @Test fun anUnknownStatusFallsBackTheWayTheServerDoes() {
+        // `publicStatus()` folds anything it does not know to `scheduled`, so a word
+        // the app has never seen is a contract break rather than a state — and
+        // rendering a raw enum at a reader is not an improvement on it.
+        assertEquals(
+            R.string.events_status_scheduled,
+            statusWordRes("starting", "2026-09-12T20:00:00Z", Instant.now()),
+        )
+        assertEquals(
+            R.string.events_status_scheduled,
+            statusWordRes(null, null, Instant.now()),
+        )
+    }
+}

app/src/test/java/com/runicgateway/app/ui/events/EventsViewModelsTest.kt

@@ -0,0 +1,261 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.ui.events
+
+import androidx.lifecycle.SavedStateHandle
+import com.runicgateway.app.core.auth.SessionManager
+import com.runicgateway.app.core.auth.StoredSession
+import com.runicgateway.app.core.auth.TokenStore
+import com.runicgateway.app.data.api.dto.SafeUserDto
+import com.runicgateway.app.data.api.dto.EventCalendarDto
+import com.runicgateway.app.data.api.dto.EventCalendarEntryDto
+import com.runicgateway.app.data.api.dto.EventHistoryDto
+import com.runicgateway.app.data.api.dto.EventHistoryEntryDto
+import com.runicgateway.app.data.api.dto.EventSeriesDto
+import com.runicgateway.app.data.api.dto.EventSeriesResponse
+import com.runicgateway.app.data.api.dto.PublicEventDto
+import com.runicgateway.app.data.api.dto.PublicEventResponse
+import com.runicgateway.app.data.api.fake.FakeEventsApi
+import com.runicgateway.app.data.repository.EventsRepository
+import com.runicgateway.app.ui.ErrorKind
+import com.runicgateway.app.ui.UiState
+import com.runicgateway.app.util.MainDispatcherRule
+import com.runicgateway.app.util.httpError
+import kotlinx.coroutines.test.runTest
+import kotlinx.serialization.json.Json
+import org.junit.Assert.assertEquals
+import org.junit.Assert.assertNull
+import org.junit.Assert.assertTrue
+import org.junit.Rule
+import org.junit.Test
+import java.io.IOException
+
+/** The four event screens' view models (PLAN.md §9 M13). */
+class EventsViewModelsTest {
+
+    @get:Rule val dispatcher = MainDispatcherRule()
+
+    private val api = FakeEventsApi()
+    private val repository = EventsRepository(api)
+
+    private fun entry(slug: String, at: String, kind: String = "run") =
+        EventCalendarEntryDto(kind = kind, title = slug, slug = slug, scheduledFor = at)
+
+    // ── The calendar ─────────────────────────────────────────────────────
+
+    @Test fun theCalendarAsksForNoWindow() = runTest {
+        api.calendar = EventCalendarDto(entries = listOf(entry("a", "2026-09-11T20:00:00Z")))
+
+        val state = EventsViewModel(repository).state.value
+
+        assertTrue(state is UiState.Success)
+        assertEquals(1, (state as UiState.Success).data.entries.size)
+    }
+
+    @Test fun aFourOhFourOnTheCalendarIsNotAFeatureBeingSwitchedOff() = runTest {
+        // These are CORE routes: `toShardUiState`'s "not published here" would name
+        // the wrong cause, and offer an explanation an admin cannot act on.
+        api.error = httpError(404)
+
+        val state = EventsViewModel(repository).state.value
+
+        assertEquals(ErrorKind.NOT_FOUND, (state as UiState.Error).kind)
+    }
+
+    @Test fun theServersOrderIsPreservedByTheDayGrouping() {
+        // The server already sorted by instant; grouping must not re-sort. Two
+        // entries on one reader-day share a heading, a third on another starts one.
+        val entries = listOf(
+            entry("a", "2026-09-11T20:00:00Z"),
+            entry("b", "2026-09-11T21:00:00Z"),
+            entry("c", "2026-09-14T20:00:00Z"),
+        )
+
+        val days = groupByReaderDay(entries)
+
+        assertEquals(2, days.size)
+        assertEquals(listOf("a", "b"), days[0].entries.map { it.slug })
+        assertEquals(listOf("c"), days[1].entries.map { it.slug })
+    }
+
+    @Test fun anEntrySaysWhetherItIsAForecast() {
+        assertTrue(entry("a", "2026-09-11T20:00:00Z", kind = "projected").isProjected)
+        assertTrue(!entry("a", "2026-09-11T20:00:00Z").isProjected)
+    }
+
+    // ── One event ────────────────────────────────────────────────────────
+
+    @Test fun theRunIsPassedThroughUntouched() = runTest {
+        api.event = PublicEventResponse(PublicEventDto(slug = "yew"))
+        val handle = SavedStateHandle(mapOf("slug" to "yew", "run" to "3692"))
+
+        EventViewModel(repository, handle)
+
+        assertEquals("yew", api.lastSlug)
+        assertEquals("3692", api.lastRun)
+    }
+
+    @Test fun aBlankRunIsDroppedRatherThanForwarded() = runTest {
+        api.event = PublicEventResponse(PublicEventDto(slug = "yew"))
+        val handle = SavedStateHandle(mapOf("slug" to "yew", "run" to "  "))
+
+        EventViewModel(repository, handle)
+
+        assertNull(api.lastRun)
+    }
+
+    @Test fun anAbsentRunIsNotSent() = runTest {
+        api.event = PublicEventResponse(PublicEventDto(slug = "yew"))
+
+        EventViewModel(repository, SavedStateHandle(mapOf("slug" to "yew")))
+
+        assertNull(api.lastRun)
+    }
+
+    @Test fun theEnvelopeIsUnwrappedForTheScreen() = runTest {
+        api.event = PublicEventResponse(PublicEventDto(slug = "yew", title = "The Yew Invasion"))
+
+        val state = EventViewModel(repository, SavedStateHandle(mapOf("slug" to "yew"))).state.value
+
+        assertEquals("The Yew Invasion", (state as UiState.Success).data.title)
+    }
+
+    // ── An arc ───────────────────────────────────────────────────────────
+
+    @Test fun anArcWithNothingListedIsAnErrorRatherThanAnEmptyPage() = runTest {
+        // The server's decision, not the screen's: a page for an empty arc would
+        // publish that an operator has named something they have not announced.
+        api.error = httpError(404)
+
+        val state = EventSeriesViewModel(repository, SavedStateHandle(mapOf("slug" to "void"))).state.value
+
+        assertEquals(ErrorKind.NOT_FOUND, (state as UiState.Error).kind)
+    }
+
+    @Test fun anArcUnwrapsItsEnvelope() = runTest {
+        api.series = EventSeriesResponse(EventSeriesDto(name = "The Void", slug = "void"))
+
+        val state = EventSeriesViewModel(repository, SavedStateHandle(mapOf("slug" to "void"))).state.value
+
+        assertEquals("The Void", (state as UiState.Success).data.name)
+    }
+
+    // ── Participation history ────────────────────────────────────────────
+
+    private fun rows(vararg ids: Long) = EventHistoryDto(
+        entries = ids.map { EventHistoryEntryDto(id = it, runId = it, slug = "e$it") },
+    )
+
+    @Test fun aFractionalScoreDecodesRatherThanFailingTheWholeBody() {
+        // The regression the live walk found: `score` is DECIMAL(18,4) on the wire
+        // and a `Long` field makes kotlinx refuse the ENTIRE response, so a 200
+        // reaches the screen as a server error. Decoded from real JSON so the DTO's
+        // type is what is under test, not a hand-built object.
+        val json = Json { ignoreUnknownKeys = true; explicitNulls = false }
+
+        val history = json.decodeFromString<EventHistoryDto>(
+            """{"entries":[{"id":2,"runId":3667,"title":"Midsummer Fair","slug":"mf","score":318.5,"rank":null}]}""",
+        )
+        assertEquals(318.5, history.entries.single().score, 0.0)
+
+        val event = json.decodeFromString<PublicEventResponse>(
+            """{"event":{"slug":"mf","results":{"runId":1,"participants":[{"name":"A","score":318.5}]}}}""",
+        )
+        assertEquals(318.5, event.event.results!!.participants.single().score, 0.0)
+    }
+
+    // A signed-in session manager, so the history view model has an account to
+    // scope to. The screen is unreachable signed out.
+    private class FakeTokenStore(private var stored: StoredSession?) : TokenStore {
+        override fun load(): StoredSession? = stored
+        override fun save(session: StoredSession) { stored = session }
+        override fun clear() { stored = null }
+    }
+
+    private fun playerDto(userId: Long) =
+        SafeUserDto(id = userId, username = "u$userId", role = "player")
+
+    private fun sessionFor(userId: Long) =
+        SessionManager(FakeTokenStore(StoredSession("a", "r", userId, "u$userId", "player")))
+
+    @Test fun switchingAccountDoesNotShowThePreviousOnesHistory() {
+        // **The leak the live walk found, and the suite could not.** A drawer
+        // route's view model survives a sign-out: `navigateTopLevel` saves and
+        // restores back-stack state, so the entry keeps its ViewModelStore and a
+        // view model that loaded only in `init` never runs again. Signing out of
+        // an admin and in as a player showed the player the admin's rows, with no
+        // request made at all.
+        val sessions = sessionFor(33)
+        api.history = rows(9, 8)
+        val vm = MyEventsViewModel(repository, sessions)
+        assertEquals(2, (vm.state.value.items as UiState.Success).data.size)
+
+        api.history = rows(1)
+        sessions.onSignedOut()
+        // Signed out, the previous account's rows are gone rather than left up.
+        assertEquals(0, (vm.state.value.items as UiState.Success).data.size)
+
+        sessions.onSignedIn("a", "r", playerDto(35))
+        assertEquals(listOf(1L), (vm.state.value.items as UiState.Success).data.map { it.id })
+    }
+
+    @Test fun aResumeRevalidationReturningTheSameUserDoesNotRefetch() {
+        // The other half: the gate is the account, not every session emission.
+        val sessions = sessionFor(33)
+        api.history = rows(9, 8)
+        val vm = MyEventsViewModel(repository, sessions)
+        val callsAfterFirstLoad = api.historyCalls
+
+        sessions.onUserRefreshed(playerDto(33))
+
+        assertEquals(callsAfterFirstLoad, api.historyCalls)
+        assertEquals(2, (vm.state.value.items as UiState.Success).data.size)
+    }
+
+    @Test fun aShortFirstPageIsTheEnd() = runTest {
+        api.history = rows(3, 2, 1)
+
+        val state = MyEventsViewModel(repository, sessionFor(1)).state.value
+
+        assertEquals(3, (state.items as UiState.Success).data.size)
+        assertTrue(!state.hasMore)
+    }
+
+    @Test fun aFullPageWalksBackOnTheLastRowsOwnId() = runTest {
+        // Keyset, never an offset: the list gains rows at the top as the reader
+        // attends things, so an offset page would skip and repeat around the seam.
+        api.history = rows(*(1L..25L).reversed().toList().toLongArray())
+        val vm = MyEventsViewModel(repository, sessionFor(1))
+        assertTrue(vm.state.value.hasMore)
+
+        api.history = rows(0)
+        vm.loadMore()
+
+        assertEquals(1L, api.lastBefore)
+        assertEquals(26, (vm.state.value.items as UiState.Success).data.size)
+        assertTrue(!vm.state.value.hasMore)
+    }
+
+    @Test fun aFailedNextPageKeepsThePagesAlreadyRead() = runTest {
+        api.history = rows(*(1L..25L).reversed().toList().toLongArray())
+        val vm = MyEventsViewModel(repository, sessionFor(1))
+
+        api.error = IOException("offline")
+        vm.loadMore()
+
+        // Not an error screen replacing a screenful of history.
+        assertEquals(25, (vm.state.value.items as UiState.Success).data.size)
+        assertTrue(!vm.state.value.loadingMore)
+    }
+
+    @Test fun loadMoreDoesNothingWithoutAFullFirstPage() = runTest {
+        api.history = rows(2, 1)
+        val vm = MyEventsViewModel(repository, sessionFor(1))
+        val callsAfterLoad = api.historyCalls
+
+        vm.loadMore()
+
+        assertEquals(callsAfterLoad, api.historyCalls)
+    }
+}

app/src/test/java/com/runicgateway/app/ui/navigation/MenuCapabilityGatingTest.kt

@@ -0,0 +1,175 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.ui.navigation
+
+import com.runicgateway.app.core.auth.Role
+import com.runicgateway.app.core.auth.Session
+import com.runicgateway.app.core.auth.SessionUser
+import com.runicgateway.app.data.repository.Capability
+import com.runicgateway.app.data.repository.ShardFeature
+import com.runicgateway.app.data.repository.ShardFeatures
+import com.runicgateway.app.data.repository.SiteCapabilities
+import org.junit.Assert.assertEquals
+import org.junit.Assert.assertFalse
+import org.junit.Assert.assertTrue
+import org.junit.Test
+
+/**
+ * The third gate on a drawer row (PLAN.md §5, §9 M13): whether the code behind it
+ * is installed on this backend at all.
+ *
+ * **A different question from the feature flag, which is why it is a third
+ * filter.** Capability is per HOST — it changes when an operator installs or
+ * removes a module. A feature is per VIEWER — it changes on sign-in. The two also
+ * fail differently, and the difference is the bug this milestone fixed.
+ */
+class MenuCapabilityGatingTest {
+
+    private fun signedIn(role: Role) =
+        Session.SignedIn(SessionUser(id = 1, username = "u", role = role))
+
+    private fun serving(vararg caps: String) =
+        SiteCapabilities(core = emptySet(), modules = caps.toSet())
+
+    private val shardEntry = MenuEntry(
+        "shard",
+        0,
+        MenuAccess.PUBLIC,
+        feature = ShardFeature.STATUS,
+        capability = Capability.SHARD,
+    )
+    private val eventsEntry = MenuEntry("events", 0, MenuAccess.PUBLIC, capability = Capability.EVENTS)
+    private val plainEntry = MenuEntry("news", 0, MenuAccess.PUBLIC)
+
+    private fun everyFeature() = ShardFeatures(level = "anonymous", visible = setOf(ShardFeature.STATUS))
+
+    @Test fun aRowHidesWhenTheBackendSaysItsModuleIsNotInstalled() {
+        // The whole point. On a site with no game module `/public/shard/features`
+        // 404s, so the FEATURE answer is unknown and fails open — and before M13
+        // that was the only answer the app had, so the row rendered and 404'd.
+        val entries = listOf(plainEntry, shardEntry, eventsEntry)
+
+        val visible = visibleEntries(
+            entries,
+            Session.SignedOut,
+            features = null,
+            capabilities = serving("events"),
+        ).map { it.route }
+
+        assertEquals(listOf("news", "events"), visible)
+    }
+
+    @Test fun anUnknownCapabilityAnswerLeavesEveryRowShowing() {
+        // A host that has never answered. Same fail-open direction the feature gate
+        // takes, and for the same reason: the server gates every call regardless.
+        val entries = listOf(plainEntry, shardEntry, eventsEntry)
+
+        val visible = visibleEntries(
+            entries,
+            Session.SignedOut,
+            features = everyFeature(),
+            capabilities = null,
+        ).map { it.route }
+
+        assertEquals(listOf("news", "shard", "events"), visible)
+    }
+
+    @Test fun anEmptyAnswerIsNotAnUnknownAnswer() {
+        // The distinction the whole milestone rests on, as one assertion.
+        assertTrue(isEntryVisible(shardEntry, Session.SignedOut, everyFeature(), null))
+        assertFalse(isEntryVisible(shardEntry, Session.SignedOut, everyFeature(), serving()))
+    }
+
+    @Test fun bothGatesMustPassAndNeitherCanOverrideTheOther() {
+        val installed = serving(Capability.SHARD)
+
+        // Installed but not published to this viewer: hidden.
+        assertFalse(
+            isEntryVisible(shardEntry, Session.SignedOut, ShardFeatures("anonymous", emptySet()), installed),
+        )
+        // Published but the module is gone: hidden. (Not a state a real backend
+        // reaches, and the gate must not depend on that.)
+        assertFalse(isEntryVisible(shardEntry, Session.SignedOut, everyFeature(), serving()))
+        // Both: shown.
+        assertTrue(isEntryVisible(shardEntry, Session.SignedOut, everyFeature(), installed))
+    }
+
+    @Test fun theRoleGateStillOutranksBoth() {
+        // An admin row is an admin row on a backend that serves everything.
+        val adminEntry = MenuEntry("admin/dashboard", 0, MenuAccess.STAFF)
+        assertFalse(
+            isEntryVisible(adminEntry, Session.SignedOut, everyFeature(), serving(Capability.SHARD)),
+        )
+        assertTrue(
+            isEntryVisible(adminEntry, signedIn(Role.ADMIN), everyFeature(), serving(Capability.SHARD)),
+        )
+    }
+
+    @Test fun aRowWithNoCapabilityIsNeverGatedByOne() {
+        // Every row that predates M13 keeps the behaviour it had.
+        assertTrue(isEntryVisible(plainEntry, Session.SignedOut, null, serving()))
+        assertTrue(isEntryVisible(plainEntry, Session.SignedOut, null, null))
+    }
+
+    // ── The shipped menu, as coded ───────────────────────────────────────
+
+    @Test fun everyRowOnAModulePathDeclaresTheShardCapability() {
+        // **Defined by ROUTE, not by "has a feature", and the live walk is why.**
+        // The first cut of this test asked whether every row with a `feature`
+        // declared the capability — which is true and insufficient: the three
+        // player game-data rows read `/player/shard/*`, the same module's player
+        // mount, and carry no feature at all because they are gated by ownership
+        // rather than by the visibility framework. They rendered on a backend with
+        // no module installed and answered "This content couldn't be found",
+        // through a green suite.
+        val onAModulePath = APP_MENU.filter {
+            it.route.startsWith("shard") || it.route.startsWith("player/") || it.route == Routes.ATLAS
+        }
+        assertEquals(8, onAModulePath.size)
+        assertTrue(
+            onAModulePath.filter { it.capability != Capability.SHARD }.map { it.route }.toString(),
+            onAModulePath.all { it.capability == Capability.SHARD },
+        )
+    }
+
+    @Test fun aModuleLessBackendShowsNoModuleRowToAnybody() {
+        // The walk's assertion, as a test: every rung, and not one module row.
+        val core = SiteCapabilities(core = setOf(Capability.EVENTS), modules = emptySet())
+        for (session in listOf(
+            Session.SignedOut,
+            signedIn(Role.PLAYER),
+            signedIn(Role.ADMIN),
+        )) {
+            val visible = visibleEntries(APP_MENU, session, everyFeature(), core).map { it.route }
+            assertTrue(
+                visible.toString(),
+                visible.none {
+                    it.startsWith("shard") || it.startsWith("player/") || it == Routes.ATLAS
+                },
+            )
+            // …and the core rows are all still there.
+            assertTrue(Routes.EVENTS in visible)
+            assertTrue(Routes.NEWS in visible)
+        }
+    }
+
+    @Test fun bothEventRowsDeclareCoresCapabilityAndNoFeature() {
+        // Events are core's. A `feature` on one of them would gate a core screen on
+        // a module's visibility config, which is the coupling this separation exists
+        // to prevent.
+        val eventRows = APP_MENU.filter { it.capability == Capability.EVENTS }
+        assertEquals(listOf(Routes.EVENTS, Routes.MY_EVENTS), eventRows.map { it.route })
+        assertTrue(eventRows.all { it.feature == null })
+    }
+
+    @Test fun myEventsIsSignedInRatherThanPlayer() {
+        // The route is `requireAuth` alone and self-scoped; staff attend events too,
+        // and the website needed two mounts only because of its own /account guard.
+        val row = APP_MENU.first { it.route == Routes.MY_EVENTS }
+        assertEquals(MenuAccess.SIGNED_IN, row.access)
+        assertTrue(isEntryVisible(row, signedIn(Role.ADMIN), null, serving(Capability.EVENTS)))
+        assertTrue(isEntryVisible(row, signedIn(Role.PLAYER), null, serving(Capability.EVENTS)))
+        assertFalse(isEntryVisible(row, Session.SignedOut, null, serving(Capability.EVENTS)))
+    }
+}

app/src/test/java/com/runicgateway/app/ui/navigation/NavOverridesTest.kt

@@ -44,12 +44,30 @@ class NavOverridesTest {
 
     private fun routes(nav: JsonObject?) = applyNavOverrides(APP_MENU, nav).map { it.route }
 
-    /** The public block's routes, in coded order — the first nine of APP_MENU. */
-    private val codedPublic = listOf(
-        Routes.HOME, Routes.NEWS, Routes.WIKI, Routes.SHARD, Routes.SHARD_RULES,
-        Routes.ATLAS, Routes.SHARD_LEADERBOARDS, Routes.SHARD_MARKET, Routes.page("about"),
+    /**
+     * The public block once a stored row has made the merge sort it — the website's
+     * number line, not the app's coded order.
+     *
+     * **About sits above the shard rows here, and that is the corrected table
+     * showing through** (M13): About is core's last nav row at index 7 and the
+     * module's nine append after it at 8-16. Under the stale sixteen-row table
+     * About was index 15 and came last, which is what these assertions used to say.
+     *
+     * **The Rust row is last, at 17** (M14). These tests carry no capability
+     * answer, which fails open, so both game modules' rows appear here — a state
+     * no real backend is in and exactly the one this merge has to be correct for,
+     * since the sort key is the website's number line and not what happens to be
+     * installed.
+     */
+    private val mergedPublic = listOf(
+        Routes.HOME, Routes.NEWS, Routes.EVENTS, Routes.WIKI, Routes.page("about"),
+        Routes.SHARD, Routes.SHARD_RULES, Routes.ATLAS, Routes.SHARD_LEADERBOARDS,
+        Routes.SHARD_MARKET, Routes.RUST,
     )
 
+    /** How many rows that block holds, so the take/drop below say why. */
+    private val publicBlock = mergedPublic.size
+
     // ── AC-1: the untouched instance ─────────────────────────────────────
 
     @Test fun noStoredRowReturnsTheCodedMenuItself() {
@@ -71,7 +89,7 @@ class NavOverridesTest {
             "/site/news" to entry(hidden = false),
             "/admin/appearance" to entry(label = "Nope"),
             "/site/screenshots" to entry(label = "Shots", order = 0),
-            "/site/champs" to entry(hidden = true),
+            "/uo/champs" to entry(hidden = true),
         )
 
         assertSame(APP_MENU, applyNavOverrides(APP_MENU, stored))
@@ -85,7 +103,7 @@ class NavOverridesTest {
 
         val merged = applyNavOverrides(APP_MENU, stored)
 
-        assertEquals(codedPublic, merged.take(9).map { it.route })
+        assertEquals(mergedPublic, merged.take(publicBlock).map { it.route })
         assertEquals("Codex", merged.first { it.route == Routes.WIKI }.label)
         assertNull(merged.first { it.route == Routes.NEWS }.label)
     }
@@ -93,14 +111,16 @@ class NavOverridesTest {
     // ── Labels ───────────────────────────────────────────────────────────
 
     @Test fun aLabelOverridesTheBundledString() {
-        val merged = applyNavOverrides(APP_MENU, nav("/site/shard" to entry(label = "  The Realm  ")))
+        // `/uo/shard`, not `/site/shard`: the row belongs to module-uo and core
+        // mounts a module's pages at `/<id>/<path>` (M13).
+        val merged = applyNavOverrides(APP_MENU, nav("/uo/shard" to entry(label = "  The Realm  ")))
 
         val shard = merged.first { it.route == Routes.SHARD }
         assertEquals("The Realm", shard.label)
         // The override lands on `label` and nothing else — the gates are untouched.
         assertEquals(ShardFeature.STATUS, shard.feature)
         assertEquals(MenuAccess.PUBLIC, shard.access)
-        assertEquals(codedPublic, merged.take(9).map { it.route })
+        assertEquals(mergedPublic, merged.take(publicBlock).map { it.route })
     }
 
     @Test fun aNonStringLabelIsIgnored() {
@@ -112,7 +132,7 @@ class NavOverridesTest {
     // ── Hidden ───────────────────────────────────────────────────────────
 
     @Test fun hiddenDropsTheRow() {
-        val routes = routes(nav("/site/market" to entry(hidden = true)))
+        val routes = routes(nav("/uo/market" to entry(hidden = true)))
 
         assertTrue(Routes.SHARD_MARKET !in routes)
         assertEquals(APP_MENU.size - 1, routes.size)
@@ -128,7 +148,7 @@ class NavOverridesTest {
     }
 
     @Test fun hiddenFalseHidesNothing() {
-        assertSame(APP_MENU, applyNavOverrides(APP_MENU, nav("/site/market" to entry(hidden = false))))
+        assertSame(APP_MENU, applyNavOverrides(APP_MENU, nav("/uo/market" to entry(hidden = false))))
     }
 
     @Test fun hiddenWinsOverALabelOnTheSameRow() {
@@ -140,44 +160,51 @@ class NavOverridesTest {
     // ── Order ────────────────────────────────────────────────────────────
 
     @Test fun anExplicitOrderMovesTheRowWithinThePublicBlock() {
-        // The website's own indices: About is 15 and Home is 0, so swapping them
-        // is what an admin dragging About to the top writes.
+        // The website's own indices: About is 7, Market is 16, and the Rust row —
+        // the last of all, now that a second game module's row appends after the
+        // first's nine — is 17. Dragging About to the top and Home past the end
+        // writes exactly this.
         val routes = routes(
             nav(
                 "/site/about" to entry(order = 0),
-                "/" to entry(order = 15),
+                "/" to entry(order = 18),
             ),
         )
 
         assertEquals(
             listOf(
-                Routes.page("about"), Routes.NEWS, Routes.WIKI, Routes.SHARD, Routes.SHARD_RULES,
-                Routes.ATLAS, Routes.SHARD_LEADERBOARDS, Routes.SHARD_MARKET, Routes.HOME,
+                Routes.page("about"), Routes.NEWS, Routes.EVENTS, Routes.WIKI, Routes.SHARD,
+                Routes.SHARD_RULES, Routes.ATLAS, Routes.SHARD_LEADERBOARDS, Routes.SHARD_MARKET,
+                Routes.RUST, Routes.HOME,
             ),
-            routes.take(9),
+            routes.take(publicBlock),
         )
     }
 
     @Test fun anUntouchedRowKeepsItsPlaceOnTheWebsitesNumberLine() {
         // The tie-break that needs the website's order rather than the app's: an
-        // explicit 5 meets Wiki's implicit 5 (its index in the site's nav, where
-        // the three news categories sit between News and Wiki). Explicit wins.
-        val routes = routes(nav("/site/about" to entry(order = 5)))
+        // explicit 6 meets Wiki's implicit 6 (its index in the site's nav, where
+        // Events and the three news categories sit between News and Wiki). Explicit
+        // wins. That the number moved from 5 to 6 when the site gained a row is the
+        // whole reason this table has to track the site's nav rather than the app's.
+        val routes = routes(nav("/site/about" to entry(order = 6)))
 
         assertEquals(
-            listOf(Routes.HOME, Routes.NEWS, Routes.page("about"), Routes.WIKI),
-            routes.take(4),
+            listOf(Routes.HOME, Routes.NEWS, Routes.EVENTS, Routes.page("about"), Routes.WIKI),
+            routes.take(5),
         )
     }
 
     @Test fun theAppsOwnRowsKeepTheirCodedOrderAfterThePublicBlock() {
-        // Contact, Account, Notifications, the three player groups and the four
-        // staff rows have no website counterpart to be reordered against (§6.2).
-        val tail = APP_MENU.drop(9).map { it.route }
+        // Contact, Account, Notifications, My Events, the three player groups and
+        // the four staff rows have no website counterpart to be reordered against
+        // (§6.2) — My Events because `/account/events` is behind the site's own
+        // auth guard and is not on its public nav at all.
+        val tail = APP_MENU.drop(publicBlock).map { it.route }
 
         val merged = routes(nav("/site/about" to entry(order = 0)))
 
-        assertEquals(tail, merged.drop(9))
+        assertEquals(tail, merged.drop(publicBlock))
     }
 
     @Test fun reorderingAndHidingCompose() {
@@ -224,7 +251,7 @@ class NavOverridesTest {
 
     @Test fun anOverrideCannotUnhideAFeatureGatedRow() {
         val stored = nav(
-            "/site/market" to entry(label = "Bazaar", hidden = false, order = 0),
+            "/uo/market" to entry(label = "Bazaar", hidden = false, order = 0),
         )
 
         val visible = visibleEntries(

app/src/test/java/com/runicgateway/app/ui/navigation/NavPathsTest.kt

@@ -19,13 +19,27 @@ import org.junit.Test
 class NavPathsTest {
 
     @Test fun everyWebsiteNavPathIsMapped() {
-        // The sixteen rows of SiteHeader.jsx's NAV, quoted in NavPaths.kt. If the
-        // site adds one, this is the test that says so — a path with no mapping is
-        // silently unresolvable in phase 6's link handling.
-        assertEquals(16, WEBSITE_PUBLIC_NAV.size)
+        // Core's eight rows, module-uo's nine and module-rust's one, all quoted in
+        // NavPaths.kt. If any of the three adds one, this is the test that says so
+        // — a path with no mapping is silently unresolvable in phase 6's link
+        // handling, which is exactly how the nine shard rows went stale for a month
+        // after the module-system cutover moved them from /site/ to /uo/ (M13).
+        assertEquals(18, WEBSITE_PUBLIC_NAV.size)
         assertEquals(WEBSITE_PUBLIC_NAV.size, WEB_PATH_TO_ROUTE.size)
     }
 
+    @Test fun theShardRowsAreTheModulesPathsNotCores() {
+        // The defect M13 fixed, kept as an assertion: these nine belong to
+        // module-uo and core mounts a module's pages at `/<id>/<path>`. A `/site/`
+        // spelling here is the stale table coming back.
+        val shard = WEBSITE_PUBLIC_NAV.map { it.path }.filter { it.startsWith("/uo/") }
+        assertEquals(9, shard.size)
+        assertTrue(WEBSITE_PUBLIC_NAV.none { it.path.startsWith("/site/shard") })
+        assertTrue(WEBSITE_PUBLIC_NAV.none { it.path == "/site/champs" })
+        assertNull(appRouteForWebPath("/site/champs"))
+        assertEquals(Routes.SHARD_CHAMPS, appRouteForWebPath("/uo/champs"))
+    }
+
     @Test fun everyMappedRouteIsDistinct() {
         // WEB_ROUTE_ORDER is keyed by route, so a duplicate would silently drop a
         // row's position from the sort.
@@ -34,24 +48,36 @@ class NavPathsTest {
     }
 
     @Test fun theWebsitesOrderIsPreserved() {
-        // Load-bearing: a stored `order` is an index into this list.
+        // Load-bearing: a stored `order` is an index into this list. Core numbers
+        // 0-7 and `mergeFlat` appends the module's rows after them, none of which
+        // declares an `order` of its own.
         assertEquals(0, WEB_ROUTE_ORDER[Routes.HOME])
         assertEquals(1, WEB_ROUTE_ORDER[Routes.NEWS])
-        assertEquals(5, WEB_ROUTE_ORDER[Routes.WIKI])
-        assertEquals(15, WEB_ROUTE_ORDER[Routes.page("about")])
+        assertEquals(2, WEB_ROUTE_ORDER[Routes.EVENTS])
+        assertEquals(6, WEB_ROUTE_ORDER[Routes.WIKI])
+        assertEquals(7, WEB_ROUTE_ORDER[Routes.page("about")])
+        assertEquals(8, WEB_ROUTE_ORDER[Routes.SHARD])
+        assertEquals(16, WEB_ROUTE_ORDER[Routes.SHARD_MARKET])
     }
 
-    @Test fun theNineDrawerRowsAreTheIntersectionWithAppMenu() {
-        // Nine of the sixteen have a drawer row. The other seven are mapped but not
-        // surfaced — three news category tabs and the four Shard hub boards — and
-        // an override for one of them is ignored rather than obeyed (§6.2).
+    @Test fun theDrawerRowsAreTheIntersectionWithAppMenu() {
+        // Eleven of the eighteen have a drawer row. The other seven are mapped but
+        // not surfaced — three news category tabs and the four Shard hub boards —
+        // and an override for one of them is ignored rather than obeyed (§6.2).
+        //
+        // **Both game modules appear here, and no backend serves both lists.** The
+        // table is a superset on purpose: a path for a module an operator has not
+        // installed never appears in that backend's nav and is never looked up,
+        // while a path MISSING from it makes a link that does exist hand off to a
+        // browser.
         val coded = APP_MENU.map { it.route }.toSet()
         val surfaced = WEBSITE_PUBLIC_NAV.filter { it.route in coded }.map { it.path }
 
         assertEquals(
             listOf(
-                "/", "/site/news", "/wiki", "/site/shard", "/site/rules",
-                "/site/atlas", "/site/leaderboards", "/site/market", "/site/about",
+                "/", "/site/news", "/site/events", "/wiki", "/site/about",
+                "/uo/shard", "/uo/rules", "/uo/atlas", "/uo/leaderboards", "/uo/market",
+                "/rust",
             ),
             surfaced,
         )
@@ -62,7 +88,7 @@ class NavPathsTest {
         // tab or a hub board is a perfectly good destination.
         val unsurfaced = listOf(
             "/site/screenshots", "/site/five-on-friday", "/site/newsletter",
-            "/site/champs", "/site/guilds", "/site/governors", "/site/houses",
+            "/uo/champs", "/uo/guilds", "/uo/governors", "/uo/houses",
         )
 
         assertTrue(unsurfaced.all { appRouteForWebPath(it) != null })
@@ -113,13 +139,13 @@ class NavPathsTest {
     @Test fun aTrailingSlashIsTolerated() {
         // A hand-edited settings row may carry one; the root is left alone.
         assertEquals(Routes.WIKI, appRouteForWebPath("/wiki/"))
-        assertEquals(Routes.SHARD, appRouteForWebPath("  /site/shard/  "))
+        assertEquals(Routes.SHARD, appRouteForWebPath("  /uo/shard/  "))
         assertEquals(Routes.HOME, appRouteForWebPath("/"))
     }
 
     // ── resolveWebPath: an added link may name any page on the site (§6.3) ──
 
-    @Test fun theNavTablesSixteenPathsResolveTheSameWay() {
+    @Test fun theNavTablesPathsResolveTheSameWay() {
         // An added link to a path the nav already knows must land where the nav row
         // does, or the same destination would behave differently depending on how
         // the admin reached it.
@@ -132,9 +158,71 @@ class NavPathsTest {
         // Read off website/client/src/App.jsx. Note what is NOT here: the site has
         // no /site/news/<id> route — its one post-detail route is the newsletter's.
         assertEquals(Routes.wikiPage("smithing"), resolveWebPath("/wiki/smithing"))
-        assertEquals(Routes.atlasCreature("dragon"), resolveWebPath("/site/atlas/dragon"))
-        assertEquals(Routes.marketVendor("0x24C"), resolveWebPath("/site/market/vendors/0x24C"))
+        assertEquals(Routes.atlasCreature("dragon"), resolveWebPath("/uo/atlas/dragon"))
+        assertEquals(Routes.marketVendor("0x24C"), resolveWebPath("/uo/market/vendors/0x24C"))
         assertEquals(Routes.post("newsletter", "12"), resolveWebPath("/site/newsletter/12"))
+        // The module's detail routes are the module's; the old /site/ spelling is
+        // not a second address for them.
+        assertNull(resolveWebPath("/site/atlas/dragon"))
+        assertNull(resolveWebPath("/site/market/vendors/0x24C"))
+    }
+
+    // ── Events (M13) ───────────────────────────────────────
+
+    @Test fun theEventPagesResolve() {
+        assertEquals(Routes.EVENTS, resolveWebPath("/site/events"))
+        assertEquals(Routes.event("the-yew-invasion"), resolveWebPath("/site/events/the-yew-invasion"))
+        assertEquals(
+            Routes.eventSeries("the-void"),
+            resolveWebPath("/site/events/series/the-void"),
+        )
+    }
+
+    @Test fun anEventUrlsRunIsCarriedThrough() {
+        // The one exception to "a query hands off", and the whole reason for it:
+        // this is the exact shape events Phase 14a's `eventUrl` writes into every
+        // announcement. Dropping the run would open next Friday's occurrence from a
+        // mail about last Friday's.
+        assertEquals(
+            Routes.event("the-yew-invasion", "3692"),
+            resolveWebPath("/site/events/the-yew-invasion?run=3692"),
+        )
+        assertEquals("events/the-yew-invasion?run=3692", Routes.event("the-yew-invasion", "3692"))
+    }
+
+    @Test fun theRunCarveOutIsOneKeyOnOnePath() {
+        // Narrow on purpose. Anything the app cannot honor natively hands off, so
+        // the browser gets the parameter the author actually wrote.
+        assertNull(resolveWebPath("/site/events/x?utm=mail"))
+        assertNull(resolveWebPath("/site/events/x?run=3&utm=mail"))
+        assertNull(resolveWebPath("/site/events/x?run="))
+        assertNull(resolveWebPath("/site/events/x#results"))
+        assertNull(resolveWebPath("/site/events?seriesId=3"))
+        assertNull(resolveWebPath("/site/events/series/the-void?run=3"))
+        // And no OTHER path gained a query: the rule is one path's, not general.
+        assertNull(resolveWebPath("/wiki/smithing?x=1"))
+    }
+
+    @Test fun anEventRouteWithNoRunCarriesNoEmptyArgument() {
+        // `events/x?run=` would reach the screen as a blank string and be forwarded
+        // to the server as one.
+        assertEquals("events/x", Routes.event("x"))
+        assertEquals("events/x", Routes.event("x", null))
+        assertEquals("events/x", Routes.event("x", "  "))
+    }
+
+    @Test fun theEventRoutePatternStripsToTheTopLevelRoute() {
+        // Same rule the News hub needs: `destination.route` is the pattern, and the
+        // drawer compares on the part before the query.
+        assertEquals(Routes.EVENTS, Routes.EVENT_ROUTE.substringBefore('?').substringBefore('/'))
+        assertEquals("events/{slug}", Routes.EVENT_ROUTE.substringBefore('?'))
+    }
+
+    @Test fun myEventsHasNoDynamicSibling() {
+        // `events/mine` would race `events/{slug}` — both two segments — which is
+        // the static-versus-argument bug events Phase 13 shipped one tier along.
+        assertTrue(Routes.MY_EVENTS.startsWith("account/"))
+        assertNull(resolveWebPath("/account/events"))
     }
 
     @Test fun aTopLevelSlugIsACmsPage() {
@@ -157,15 +245,18 @@ class NavPathsTest {
 
     @Test fun aPathTheAppHasNoScreenForHandsOff() {
         assertNull(resolveWebPath("/site/status"))
-        assertNull(resolveWebPath("/site/shard/activity"))
+        assertNull(resolveWebPath("/uo/shard/activity"))
+        assertNull(resolveWebPath("/uo/guilds/12"))
+        // `/uo` is a module's namespace, not a CMS page slug.
+        assertNull(resolveWebPath("/uo"))
         assertNull(resolveWebPath("/account/login"))
         assertNull(resolveWebPath("/admin/navigation"))
         assertNull(resolveWebPath("/site/atlas/dragon/extra"))
     }
 
     @Test fun aQueryOrFragmentHandsOff() {
-        // No app route takes either, so a native match would quietly drop what the
-        // admin wrote. The browser honors it exactly.
+        // No app route but the event page takes either, so a native match would
+        // quietly drop what the admin wrote. The browser honors it exactly.
         assertNull(resolveWebPath("/site/news?tag=patch"))
         assertNull(resolveWebPath("/donate#tiers"))
         assertEquals(Routes.NEWS, resolveWebPath("/site/news"))

app/src/test/java/com/runicgateway/app/ui/navigation/NavTreeTest.kt

@@ -166,15 +166,17 @@ class NavTreeTest {
 
         val shape = tree(row).shape()
 
-        // Eight public rows are left at the top level (Wiki moved into the section),
-        // then the section, then the app's own rows.
-        assertEquals("section:lore", shape[8])
-        assertEquals(Routes.CONTACT, shape[9])
+        // Ten public rows are left at the top level (Wiki moved into the section),
+        // then the section, then the app's own rows. The tenth is the Rust row:
+        // these tests carry no capability answer, which fails open, so both game
+        // modules' rows are present — see NavOverridesTest's `mergedPublic`.
+        assertEquals("section:lore", shape[10])
+        assertEquals(Routes.CONTACT, shape[11])
     }
 
     @Test fun aSectionsOrderPlacesItAmongTheCodedRows() {
         // Sections sort on the same number line as everything else: the website's
-        // sixteen indices, then admin-created entities after them.
+        // seventeen indices, then admin-created entities after them.
         val row = stored(
             items = items("/wiki" to item(section = "lore")),
             sections = listOf(section("lore", order = 0)),
@@ -252,7 +254,7 @@ class NavTreeTest {
         // deliberately, and grouping is no more an invitation to surface one than
         // relabelling was (§6.2).
         val row = stored(
-            items = items("/site/champs" to item(section = "lore", label = "Champs")),
+            items = items("/uo/champs" to item(section = "lore", label = "Champs")),
             sections = listOf(section("lore")),
         )
 
@@ -324,7 +326,9 @@ class NavTreeTest {
         val shape = tree(row).shape()
 
         assertEquals(listOf("link:a", "link:b"), shape.filter { it.startsWith("link:") })
-        assertEquals(Routes.page("about"), shape[shape.indexOf("link:a") - 1])
+        // The Rust row, not About: both modules' rows append after core's eight on
+        // the website's number line, and Rust's is last at 17.
+        assertEquals(Routes.RUST, shape[shape.indexOf("link:a") - 1])
     }
 
     @Test fun aLinksOrderPlacesItAmongTheCodedRows() {
@@ -364,7 +368,7 @@ class NavTreeTest {
         // The case the rule exists for: a group whose every member is withheld by
         // the shard's visibility config must not draw as a header over nothing.
         val row = stored(
-            items = items("/site/market" to item(section = "lore")),
+            items = items("/uo/market" to item(section = "lore")),
             sections = listOf(section("lore")),
         )
 
@@ -380,7 +384,7 @@ class NavTreeTest {
     @Test fun aSectionKeepsTheMembersThisCallerMaySee() {
         val row = stored(
             items = items(
-                "/site/market" to item(section = "lore"),
+                "/uo/market" to item(section = "lore"),
                 "/wiki" to item(section = "lore"),
             ),
             sections = listOf(section("lore")),
@@ -400,7 +404,7 @@ class NavTreeTest {
         // section of its own — and still not shown, because the shard does not
         // publish the market and an admin does not outrank that.
         val row = stored(
-            items = items("/site/market" to item(label = "Bazaar", order = 0, hidden = false, section = "lore")),
+            items = items("/uo/market" to item(label = "Bazaar", order = 0, hidden = false, section = "lore")),
             sections = listOf(section("lore", order = 0)),
         )
 
@@ -418,7 +422,7 @@ class NavTreeTest {
         // Links carry no gate — the page behind one enforces its own access — so a
         // section holding one is never emptied by the caller's role.
         val row = stored(
-            items = items("/site/market" to item(section = "lore")),
+            items = items("/uo/market" to item(section = "lore")),
             sections = listOf(section("lore")),
             links = listOf(link(section = "lore")),
         )

app/src/test/java/com/runicgateway/app/ui/navigation/RustNavigationTest.kt

@@ -0,0 +1,112 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.ui.navigation
+
+import com.runicgateway.app.core.auth.Session
+import com.runicgateway.app.data.repository.Capability
+import com.runicgateway.app.data.repository.SiteCapabilities
+import org.junit.Assert.assertEquals
+import org.junit.Assert.assertFalse
+import org.junit.Assert.assertNull
+import org.junit.Assert.assertTrue
+import org.junit.Test
+
+/**
+ * The Rust row, its routes, and the two ways a Rust link can reach the app
+ * (M14, `docs/modules/rust/PLAN.md` §18).
+ *
+ * The question this file really asks is the phase criterion's other half: **a UO
+ * site is unchanged.** Two game modules can be installed on one backend, and
+ * neither one's rows may appear on a site running only the other.
+ */
+class RustNavigationTest {
+
+    private fun serving(vararg caps: String) =
+        SiteCapabilities(core = emptySet(), modules = caps.toSet())
+
+    private fun routesFor(capabilities: SiteCapabilities?) =
+        visibleEntries(APP_MENU, Session.SignedOut, features = null, capabilities = capabilities)
+            .map { it.route }
+
+    @Test fun aRustSiteShowsTheRustRowAndNoShardRows() {
+        val routes = routesFor(serving(Capability.RUST))
+
+        assertTrue(Routes.RUST in routes)
+        assertFalse("a Rust site has no shard", Routes.SHARD in routes)
+        assertFalse(Routes.ATLAS in routes)
+    }
+
+    @Test fun aUoSiteIsExactlyAsItWas() {
+        // The other half of the criterion. Adding a second game module must not
+        // put a row on a site that does not run it.
+        val routes = routesFor(serving(Capability.SHARD))
+
+        assertFalse("a UO site has no Rust row", Routes.RUST in routes)
+        assertTrue(Routes.SHARD in routes)
+    }
+
+    @Test fun bothModulesInstalledShowsBothTrees() {
+        val routes = routesFor(serving(Capability.SHARD, Capability.RUST))
+
+        assertTrue(Routes.SHARD in routes)
+        assertTrue(Routes.RUST in routes)
+    }
+
+    @Test fun theSurfaceCapabilitiesDoNotRevealTheRow() {
+        // `module-rust` declares `servers`, `killfeed`, `leaderboard`, `presence`
+        // and `wipes` as well, and the app gates on NONE of them — every one names
+        // a surface, and core flattens all modules' capabilities into one list, so
+        // another module declaring `servers` would otherwise reveal these screens
+        // on a site with no Rust at all.
+        val routes = routesFor(serving("servers", "killfeed", "leaderboard", "presence", "wipes"))
+
+        assertFalse(Routes.RUST in routes)
+    }
+
+    @Test fun aHostThatHasNeverAnsweredStillShowsEverything() {
+        // Fail-open on an UNKNOWN answer, which is not the same as an empty one.
+        // The server gates every call regardless, so the cost of guessing wrong is
+        // a link that briefly 404s.
+        assertTrue(Routes.RUST in routesFor(null))
+    }
+
+    @Test fun aServerIdIsEncodedIntoItsRoute() {
+        assertEquals("rust/servers/main", Routes.rustServer("main"))
+        assertEquals("rust/servers/eu-main", Routes.rustServer("eu-main"))
+        // An operator names these, and nothing stops one carrying a character a
+        // path would otherwise eat.
+        assertEquals("rust/servers/a%2Fb", Routes.rustServer("a/b"))
+        assertEquals("rust/servers/two%20words", Routes.rustServer("two words"))
+    }
+
+    @Test fun theWebsiteNavRowOpensNatively() {
+        // `module-rust` registers exactly one nav item, `{ label: 'Servers', to:
+        // '/rust' }`. Without this mapping an admin's nav override on that row —
+        // or an added link to it — hands off to a browser instead.
+        assertEquals(Routes.RUST, appRouteForWebPath("/rust"))
+        assertEquals(Routes.RUST, appRouteForWebPath("/rust/"))
+    }
+
+    @Test fun anAddedLinkToOneServerResolves() {
+        assertEquals(Routes.rustServer("main"), resolveWebPath("/rust/servers/main"))
+    }
+
+    @Test fun theRustPrefixIsNotMistakenForACmsPage() {
+        // The site serves CMS pages from a top-level `/<slug>`, and `/rust` would
+        // otherwise fall into that rule and open a page-not-found screen. It is
+        // reserved so the nav table above answers it — and so that a site WITHOUT
+        // the module hands off to the browser, which gives the same answer the web
+        // would.
+        assertEquals(Routes.RUST, resolveWebPath("/rust"))
+        assertNull("a deeper unknown Rust path hands off", resolveWebPath("/rust/servers/main/extra"))
+    }
+
+    @Test fun aRustPathWithAQueryHandsOff() {
+        // The website keeps tab, filter, wipe and sort in the URL; the app keeps
+        // them in a view model. Resolving `?tab=wipes` natively would silently drop
+        // what the admin wrote, so it goes to the browser, which honors it.
+        assertNull(resolveWebPath("/rust?tab=wipes"))
+        assertNull(resolveWebPath("/rust/servers/main?wipe=w1"))
+    }
+}

app/src/test/java/com/runicgateway/app/ui/notifications/InboxFormattingTest.kt

@@ -0,0 +1,43 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.ui.notifications
+
+import org.junit.Assert.assertEquals
+import org.junit.Assert.assertNull
+import org.junit.Test
+import java.time.ZoneId
+import java.time.format.DateTimeFormatter
+import java.util.Locale
+
+/**
+ * The inbox timestamp (ENGAGEMENT.md phase 8). Both wire shapes have to be read,
+ * and the zoneless one has to be read as UTC — reading it as local time would
+ * shift every stamp by the device's offset and nobody would notice until they
+ * travelled.
+ */
+class InboxFormattingTest {
+
+    private val zone = ZoneId.of("America/New_York")
+    private val format: DateTimeFormatter =
+        DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm", Locale.US)
+
+    @Test fun readsAnIsoStampWithAZone() {
+        // 12:30 UTC is 08:30 in New York on that date (EDT).
+        assertEquals("2026-08-31 08:30", inboxTimestamp("2026-08-31T12:30:00.000Z", zone, format))
+    }
+
+    @Test fun readsAZonelessStampAsUtc() {
+        assertEquals("2026-08-31 08:30", inboxTimestamp("2026-08-31 12:30:00", zone, format))
+    }
+
+    @Test fun readsAZonelessStampWithATSeparator() {
+        assertEquals("2026-08-31 08:30", inboxTimestamp("2026-08-31T12:30:00", zone, format))
+    }
+
+    @Test fun anUnparseableStampShowsNothingRatherThanFailing() {
+        assertNull(inboxTimestamp("sometime last week", zone, format))
+        assertNull(inboxTimestamp("", zone, format))
+        assertNull(inboxTimestamp("   ", zone, format))
+    }
+}

app/src/test/java/com/runicgateway/app/ui/notifications/InboxViewModelTest.kt

@@ -0,0 +1,282 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.ui.notifications
+
+import com.runicgateway.app.core.auth.SessionManager
+import com.runicgateway.app.core.auth.StoredSession
+import com.runicgateway.app.core.auth.TokenStore
+import com.runicgateway.app.core.inbox.InboxCache
+import com.runicgateway.app.core.net.BaseUrlHolder
+import com.runicgateway.app.data.api.dto.NotificationInboxDto
+import com.runicgateway.app.data.api.dto.NotificationItemDto
+import com.runicgateway.app.data.api.dto.NotificationReadResultDto
+import com.runicgateway.app.data.api.dto.SafeUserDto
+import com.runicgateway.app.data.api.fake.FakeNotificationsApi
+import com.runicgateway.app.data.repository.NotificationsRepository
+import com.runicgateway.app.ui.UiState
+import com.runicgateway.app.util.FakeInboxCache
+import com.runicgateway.app.util.MainDispatcherRule
+import com.runicgateway.app.util.httpError
+import kotlinx.coroutines.runBlocking
+import okhttp3.HttpUrl.Companion.toHttpUrl
+import org.junit.Assert.assertEquals
+import org.junit.Assert.assertFalse
+import org.junit.Assert.assertNull
+import org.junit.Assert.assertTrue
+import org.junit.Rule
+import org.junit.Test
+import java.io.IOException
+
+/**
+ * The inbox view model (ENGAGEMENT.md phase 8): the pull behind the tickle, the
+ * keyset paging, the optimistic reads, and the offline snapshot — including the
+ * one property that makes caching a person's notifications safe at all, that a
+ * snapshot never crosses an account.
+ */
+class InboxViewModelTest {
+
+    @get:Rule val mainDispatcher = MainDispatcherRule()
+
+    private class FakeTokenStore(private var stored: StoredSession?) : TokenStore {
+        override fun load(): StoredSession? = stored
+        override fun save(session: StoredSession) { stored = session }
+        override fun clear() { stored = null }
+    }
+
+    private val api = FakeNotificationsApi()
+    private val cache = FakeInboxCache()
+    private val baseUrl = BaseUrlHolder().apply { set("https://shard.example/".toHttpUrl()) }
+
+    private fun session(userId: Long = 7) =
+        SessionManager(FakeTokenStore(StoredSession("access", "refresh", userId, "alice", "player")))
+
+    private fun viewModel(sessionManager: SessionManager = session()) =
+        InboxViewModel(NotificationsRepository(api), cache, sessionManager, baseUrl)
+
+    private fun item(id: Long, read: Boolean = false) =
+        NotificationItemDto(id = id, triggerId = "team.post.created", title = "Post $id", read = read)
+
+    private fun shown(vm: InboxViewModel) = (vm.state.value.items as? UiState.Success)?.data
+
+    @Test fun loadsTheFirstPageAndCachesIt() {
+        api.pages = mapOf(null to NotificationInboxDto(items = listOf(item(2), item(1)), unread = 2))
+        val vm = viewModel()
+
+        assertEquals(listOf(2L, 1L), shown(vm)?.map { it.id })
+        assertEquals(2, vm.state.value.unread)
+        assertFalse(vm.state.value.fromCache)
+        assertEquals(1, cache.writes)
+    }
+
+    @Test fun offlineFallsBackToTheSnapshotAndSaysSo() {
+        runBlocking { cache.seed(InboxCache.ownerKey("https://shard.example/", 7), listOf(item(9)), unread = 1) }
+        api.error = IOException("offline")
+        val vm = viewModel()
+
+        assertEquals(listOf(9L), shown(vm)?.map { it.id })
+        assertEquals(1, vm.state.value.unread)
+        assertTrue(vm.state.value.fromCache)
+    }
+
+    @Test fun aSnapshotIsNeverShownToAnotherAccount() {
+        // The property the whole cache design rests on: user 7's items must not
+        // appear under user 8's session, on a device both have signed into.
+        runBlocking { cache.seed(InboxCache.ownerKey("https://shard.example/", 7), listOf(item(9)), unread = 1) }
+        api.error = IOException("offline")
+        val vm = viewModel(session(userId = 8))
+
+        assertNull(shown(vm))
+        assertTrue(vm.state.value.items is UiState.Error)
+        assertEquals(0, vm.state.value.unread)
+    }
+
+    @Test fun aServerErrorWithNothingCachedIsTheScreen() {
+        api.error = httpError(500)
+        val vm = viewModel()
+
+        assertTrue(vm.state.value.items is UiState.Error)
+        assertFalse(vm.state.value.fromCache)
+    }
+
+    @Test fun loadMorePagesOnTheLastIdNotAnOffset() {
+        api.pages = mapOf(
+            null to NotificationInboxDto(items = listOf(item(9), item(8)), hasMore = true, unread = 2),
+            8L to NotificationInboxDto(items = listOf(item(7)), hasMore = false, unread = 2),
+        )
+        val vm = viewModel()
+        vm.loadMore()
+
+        assertEquals(listOf(null, 8L), api.inboxCalls)
+        assertEquals(listOf(9L, 8L, 7L), shown(vm)?.map { it.id })
+        assertFalse(vm.state.value.hasMore)
+    }
+
+    @Test fun loadMoreDropsAnIdAlreadyOnScreen() {
+        // A keyset window can shift under a concurrent write; a duplicate id in a
+        // LazyColumn key is a crash, not a cosmetic problem.
+        api.pages = mapOf(
+            null to NotificationInboxDto(items = listOf(item(9), item(8)), hasMore = true),
+            8L to NotificationInboxDto(items = listOf(item(8), item(7))),
+        )
+        val vm = viewModel()
+        vm.loadMore()
+
+        assertEquals(listOf(9L, 8L, 7L), shown(vm)?.map { it.id })
+    }
+
+    @Test fun loadMoreDoesNothingWhileShowingTheCache() {
+        runBlocking { cache.seed(InboxCache.ownerKey("https://shard.example/", 7), listOf(item(9)), unread = 1) }
+        api.error = IOException("offline")
+        val vm = viewModel()
+        api.inboxCalls.clear()
+        vm.loadMore()
+
+        assertTrue(api.inboxCalls.isEmpty())
+    }
+
+    @Test fun markReadFlipsTheRowAndTakesTheServersCount() {
+        api.pages = mapOf(null to NotificationInboxDto(items = listOf(item(2), item(1)), unread = 2))
+        api.readResult = NotificationReadResultDto(ok = true, unread = 1)
+        val vm = viewModel()
+        vm.markRead(2)
+
+        assertEquals(listOf(2L), api.markedRead)
+        assertTrue(shown(vm)!!.first { it.id == 2L }.read)
+        assertEquals(1, vm.state.value.unread)
+    }
+
+    @Test fun markReadIsNotSentTwiceForAnItemAlreadyRead() {
+        api.pages = mapOf(null to NotificationInboxDto(items = listOf(item(2, read = true)), unread = 0))
+        val vm = viewModel()
+        vm.markRead(2)
+
+        assertTrue(api.markedRead.isEmpty())
+    }
+
+    @Test fun markAllReadEmptiesTheBadgeAndUpdatesTheSnapshot() {
+        api.pages = mapOf(null to NotificationInboxDto(items = listOf(item(2), item(1)), unread = 2))
+        val vm = viewModel()
+        val writesAfterLoad = cache.writes
+        vm.markAllRead()
+
+        assertEquals(1, api.markAllReadCalls)
+        assertEquals(0, vm.state.value.unread)
+        assertTrue(shown(vm)!!.all { it.read })
+        // Without this write, going offline right after reading everything would
+        // bring the badge back on the next cold open.
+        assertEquals(writesAfterLoad + 1, cache.writes)
+    }
+
+    // ── The item link (found by the live rig, not by a test) ──────────────
+
+    @Test fun aSiteRelativeUrlIsResolvedAgainstTheShard() {
+        // What the server actually writes: the template's button block renders a
+        // path, because on the web the reader is already on the site.
+        val vm = viewModel()
+        val item = item(1).copy(url = "/guilds/the-silver-anvil/forum/403")
+        assertEquals("https://shard.example/guilds/the-silver-anvil/forum/403", vm.linkFor(item))
+    }
+
+    @Test fun anAbsoluteUrlIsLeftAlone() {
+        val vm = viewModel()
+        assertEquals("https://elsewhere.example/x", vm.linkFor(item(1).copy(url = "https://elsewhere.example/x")))
+    }
+
+    @Test fun anItemWithNoUrlHasNoLink() {
+        val vm = viewModel()
+        assertNull(vm.linkFor(item(1)))
+        assertNull(vm.linkFor(item(1).copy(url = "   ")))
+    }
+
+    @Test fun aUrlThatCouldNotBeOpenedSafelyResolvesToNothing() {
+        val vm = viewModel()
+        assertNull(vm.linkFor(item(1).copy(url = "javascript:alert(1)")))
+        assertNull(vm.linkFor(item(1).copy(url = "intent://evil#Intent;end")))
+    }
+
+    // ── The inbox belongs to ONE account ─────────────────────────────
+
+    @Test fun switchingAccountDoesNotShowThePreviousOnesInbox() {
+        // **Found on the emulator, not by a test.** A drawer route's view model
+        // outlives a sign-out: `navigateTopLevel` saves and restores back-stack
+        // state, so the entry keeps its ViewModelStore and a view model that
+        // loaded only in `init` never runs again. Signing out and back in as
+        // somebody else showed the second account the FIRST account's inbox —
+        // titles and body text written for another person — with no request made
+        // at all, while the badge beside it showed the new account's real count.
+        val sessions = session(userId = 7)
+        api.pages = mapOf(null to NotificationInboxDto(items = listOf(item(1), item(2)), unread = 2))
+        val vm = InboxViewModel(NotificationsRepository(api), cache, sessions, baseUrl)
+        assertEquals(listOf(1L, 2L), shown(vm)!!.map { it.id })
+
+        api.pages = mapOf(null to NotificationInboxDto(items = listOf(item(9)), unread = 1))
+        sessions.onSignedOut()
+        // Signed out, the previous account's rows are gone rather than left
+        // addressable behind a shell that is navigating away.
+        assertEquals(emptyList<Long>(), shown(vm)!!.map { it.id })
+
+        sessions.onSignedIn("a", "r", SafeUserDto(id = 8, username = "bob", role = "player"))
+        assertEquals(listOf(9L), shown(vm)!!.map { it.id })
+    }
+
+    @Test fun aResumeRevalidationReturningTheSameUserDoesNotRefetch() {
+        // The gate is the account, not every session emission — the app
+        // re-validates its role on every resume.
+        val sessions = session(userId = 7)
+        api.pages = mapOf(null to NotificationInboxDto(items = listOf(item(1)), unread = 1))
+        val vm = InboxViewModel(NotificationsRepository(api), cache, sessions, baseUrl)
+        val callsAfterFirstLoad = api.inboxCalls.size
+
+        sessions.onUserRefreshed(SafeUserDto(id = 7, username = "alice", role = "admin"))
+
+        assertEquals(callsAfterFirstLoad, api.inboxCalls.size)
+        assertEquals(listOf(1L), shown(vm)!!.map { it.id })
+    }
+
+    // ── Opening an item in the app rather than a browser (M13) ─────────
+
+    @Test fun anEventAnnouncementOpensNativelyAndKeepsItsRun() {
+        // The exact shape events Phase 14a writes into every announcement. Before
+        // M13 this opened a Custom Tab onto a page the app now renders itself.
+        val vm = viewModel()
+        val item = item(1).copy(url = "/site/events/the-yew-invasion?run=3692")
+
+        assertEquals("events/the-yew-invasion?run=3692", vm.routeFor(item))
+    }
+
+    @Test fun anAbsoluteUrlOnThisHostOpensNativelyToo() {
+        // The url's shape is the server's to change; a link that reached the browser
+        // only because it arrived fully qualified would be a puzzle.
+        val vm = viewModel()
+        val item = item(1).copy(url = "https://shard.example/site/events/yew?run=7")
+
+        assertEquals("events/yew?run=7", vm.routeFor(item))
+    }
+
+    @Test fun aLinkToAnotherHostIsNotOursToRoute() {
+        val vm = viewModel()
+        val item = item(1).copy(url = "https://elsewhere.example/site/events/yew")
+
+        assertNull(vm.routeFor(item))
+        // …and still opens, in the browser, exactly as it did before.
+        assertEquals("https://elsewhere.example/site/events/yew", vm.linkFor(item))
+    }
+
+    @Test fun everyOtherLinkStillHandsOff() {
+        // The change is additive: a path the app has no screen for behaves exactly
+        // as it did, and `linkFor` is still what opens it.
+        val vm = viewModel()
+        val forum = item(1).copy(url = "/guilds/the-silver-anvil/forum/403")
+
+        assertNull(vm.routeFor(forum))
+        assertEquals("https://shard.example/guilds/the-silver-anvil/forum/403", vm.linkFor(forum))
+    }
+
+    @Test fun anItemWithNoUrlHasNoRoute() {
+        val vm = viewModel()
+        assertNull(vm.routeFor(item(1)))
+        assertNull(vm.routeFor(item(1).copy(url = "   ")))
+        assertNull(vm.routeFor(item(1).copy(url = "javascript:alert(1)")))
+    }
+}

app/src/test/java/com/runicgateway/app/ui/notifications/NotificationRoutingTest.kt

@@ -4,7 +4,7 @@
 package com.runicgateway.app.ui.notifications
 
 import com.runicgateway.app.core.push.PushStreams
-import com.runicgateway.app.data.api.dto.NotificationStreamDto
+import com.runicgateway.app.data.api.dto.NotificationChannelItemDto
 import com.runicgateway.app.ui.navigation.Routes
 import org.junit.Assert.assertEquals
 import org.junit.Assert.assertFalse
@@ -12,8 +12,9 @@ import org.junit.Assert.assertTrue
 import org.junit.Test
 
 /**
- * Tests the pure push helpers: the stream → deep-link route map (PLAN.md §11 work
- * item 7) and the personal-stream gating (a personal stream needs a linked account).
+ * Tests the pure notification helpers: the stream → deep-link route map (PLAN.md
+ * §11 work item 7), the tickle routing that ENGAGEMENT.md phase 8 layered over it,
+ * and the personal-item gating (a personal id needs a linked game account).
  */
 class NotificationRoutingTest {
 
@@ -32,14 +33,41 @@ class NotificationRoutingTest {
         assertEquals(Routes.HOME, Routes.forStream("something.new"))
     }
 
-    @Test fun personalStreamNeedsLinkedAccount() {
-        val personal = NotificationStreamDto(id = "vendor.sale", personal = true, requiresLinkedAccount = true)
-        assertFalse(streamSelectable(personal, hasLinkedAccount = false))
-        assertTrue(streamSelectable(personal, hasLinkedAccount = true))
+    @Test fun personalItemNeedsLinkedAccount() {
+        val personal = NotificationChannelItemDto(id = "vendor.sale", personal = true, requiresLinkedAccount = true)
+        assertFalse(itemSelectable(personal, hasLinkedAccount = false))
+        assertTrue(itemSelectable(personal, hasLinkedAccount = true))
     }
 
-    @Test fun generalStreamIsAlwaysSelectable() {
-        val general = NotificationStreamDto(id = "news.post", personal = false, requiresLinkedAccount = false)
-        assertTrue(streamSelectable(general, hasLinkedAccount = false))
+    @Test fun generalItemIsAlwaysSelectable() {
+        val general = NotificationChannelItemDto(id = "news.post", personal = false, requiresLinkedAccount = false)
+        assertTrue(itemSelectable(general, hasLinkedAccount = false))
+    }
+
+    // ── The tickle → destination map (ENGAGEMENT.md phase 8) ───────────────
+
+    @Test fun inboxRefLandsOnTheInboxWhateverTheStream() {
+        // The engine's stream id is a TRIGGER id in the one namespace, so most of
+        // them are strangers to `forStream` — and every one of those would have
+        // dropped the user on Home if the ref were not read.
+        assertEquals(Routes.NOTIFICATIONS, Routes.forTickle("team.post.created", "notification:42"))
+        assertEquals(Routes.NOTIFICATIONS, Routes.forTickle("uo.house.idoc_warning", "notification:7"))
+    }
+
+    @Test fun anInboxRefWinsOverAStreamThatHasItsOwnScreen() {
+        assertEquals(Routes.NOTIFICATIONS, Routes.forTickle(PushStreams.NEWS_POST, "notification:1"))
+    }
+
+    @Test fun everyOtherTickleKeepsTheRouteItAlwaysHad() {
+        assertEquals(Routes.NEWS, Routes.forTickle(PushStreams.NEWS_POST, null))
+        assertEquals(Routes.SHARD, Routes.forTickle(PushStreams.CHAMP_START, "0x40001234"))
+        assertEquals(Routes.PLAYER_HOUSES, Routes.forTickle(PushStreams.HOUSE_IDOC, "britain-2026-08-31"))
+        assertEquals(Routes.HOME, Routes.forTickle("something.new", null))
+    }
+
+    @Test fun aRefThatMerelyMentionsNotificationIsNotAnInboxRef() {
+        // Prefix, not `contains`: a ref is opaque and another producer's could
+        // easily carry the word without being a row id.
+        assertEquals(Routes.NEWS, Routes.forTickle(PushStreams.NEWS_POST, "post-notification:3"))
     }
 }

app/src/test/java/com/runicgateway/app/ui/notifications/NotificationSettingsViewModelTest.kt

@@ -0,0 +1,88 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.ui.notifications
+
+import com.runicgateway.app.data.api.dto.NotificationChannelDto
+import com.runicgateway.app.data.api.dto.NotificationChannelItemDto
+import com.runicgateway.app.data.api.dto.NotificationChannelPrefsDto
+import com.runicgateway.app.data.api.fake.FakeNotificationsApi
+import org.junit.Assert.assertEquals
+import org.junit.Assert.assertNull
+import org.junit.Test
+
+/**
+ * The per-channel preferences the settings screen renders (ENGAGEMENT.md phases 3
+ * and 8). These are the wire-shape properties the UI is built ON rather than
+ * around, so they are asserted here rather than trusted: the controls come from
+ * each item's own `channels`, and the modes from each channel's own `modes`.
+ *
+ * The view model itself needs a [com.runicgateway.app.core.push.PushManager],
+ * which owns a foreground service and a `Context`; the sparse-PUT shape it sends
+ * is asserted through the repository instead, which is the part that could be
+ * wrong on the wire.
+ */
+class NotificationSettingsViewModelTest {
+
+    private val push = NotificationChannelDto(
+        id = "push", label = "Push", carriesContent = false,
+        defaultMode = "off", supportsDigest = false, modes = listOf("off", "instant"),
+    )
+    private val email = NotificationChannelDto(
+        id = "email", label = "Email", carriesContent = true,
+        defaultMode = "off", supportsDigest = true, modes = listOf("off", "instant", "digest"),
+    )
+
+    private fun prefs() = NotificationChannelPrefsDto(
+        channels = listOf(push, email),
+        items = listOf(
+            NotificationChannelItemDto(
+                id = "news.post", label = "News posts",
+                channels = listOf("push", "email"),
+                modes = mapOf("push" to "instant", "email" to "off"),
+            ),
+            NotificationChannelItemDto(
+                id = "uo.house.idoc_warning", label = "House in danger",
+                personal = true, requiresLinkedAccount = true,
+                // A trigger-only id: nothing is registered to push it, so it carries
+                // no push key at all — the screen must render no push control rather
+                // than a dead switch.
+                channels = listOf("email"),
+                modes = mapOf("email" to "digest"),
+            ),
+        ),
+    )
+
+    @Test fun aTriggerOnlyIdOffersNoPushControl() {
+        val item = prefs().items.first { it.id == "uo.house.idoc_warning" }
+        assertEquals(listOf("email"), item.channels)
+        assertNull(item.modes[CHANNEL_PUSH])
+    }
+
+    @Test fun emailIsTheChannelThatCarriesDigest() {
+        assertEquals(listOf("off", "instant", "digest"), email.modes)
+        assertEquals(listOf("off", "instant"), push.modes)
+    }
+
+    @Test fun personalItemsStillNeedALinkedAccount() {
+        val personal = prefs().items.first { it.personal }
+        assertEquals(false, itemSelectable(personal, hasLinkedAccount = false))
+        assertEquals(true, itemSelectable(personal, hasLinkedAccount = true))
+    }
+
+    @Test fun oneToggleSendsExactlyOnePair() = kotlinx.coroutines.runBlocking {
+        // The sparse PUT is the whole reason this screen can save a single control
+        // without holding the table: anything more in the body could clobber a
+        // channel it is not showing.
+        val api = FakeNotificationsApi()
+        api.channelPrefs = prefs()
+        val repo = com.runicgateway.app.data.repository.NotificationsRepository(api)
+
+        repo.setChannelMode("news.post", "email", "digest")
+
+        assertEquals(1, api.lastPrefsUpdate?.size)
+        assertEquals("news.post", api.lastPrefsUpdate?.first()?.id)
+        assertEquals("email", api.lastPrefsUpdate?.first()?.channel)
+        assertEquals("digest", api.lastPrefsUpdate?.first()?.mode)
+    }
+}

app/src/test/java/com/runicgateway/app/ui/rust/RustBadgeViewModelTest.kt

@@ -0,0 +1,80 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.ui.rust
+
+import com.runicgateway.app.data.api.dto.RustServerDto
+import com.runicgateway.app.data.api.dto.RustServerListDto
+import com.runicgateway.app.data.api.fake.FakeRustApi
+import com.runicgateway.app.data.repository.RustRepository
+import com.runicgateway.app.util.MainDispatcherRule
+import org.junit.Assert.assertEquals
+import org.junit.Rule
+import org.junit.Test
+import java.io.IOException
+
+/** The drawer row's live count — the phone's answer to D15 (M14). */
+class RustBadgeViewModelTest {
+
+    @get:Rule
+    val dispatcherRule = MainDispatcherRule()
+
+    private val api = FakeRustApi()
+    private fun viewModel() = RustBadgeViewModel(RustRepository(api))
+
+    @Test
+    fun `it sums the people on every server`() {
+        api.servers = RustServerListDto(
+            listOf(
+                RustServerDto(id = "a", online = true, players = 12),
+                RustServerDto(id = "b", online = true, players = 30),
+            ),
+        )
+
+        val vm = viewModel()
+        vm.refresh(installed = true)
+
+        assertEquals(42, vm.online.value)
+    }
+
+    @Test
+    fun `a site without the module is never asked`() {
+        // The gate is the caller's — the drawer already knows, from the capability
+        // answer. A site running a different game makes no request at all.
+        val vm = viewModel()
+        vm.refresh(installed = false)
+
+        assertEquals(0, api.serversCalls)
+        assertEquals(0, vm.online.value)
+    }
+
+    @Test
+    fun `an unreachable server contributes nothing on its own`() {
+        // A stale or offline row already answers `online: false` with `players: 0`
+        // server-side, so there is no second staleness rule to keep in step here.
+        api.servers = RustServerListDto(
+            listOf(
+                RustServerDto(id = "a", online = true, players = 5),
+                RustServerDto(id = "b", online = false, players = 0, stale = true),
+            ),
+        )
+
+        val vm = viewModel()
+        vm.refresh(installed = true)
+
+        assertEquals(5, vm.online.value)
+    }
+
+    @Test
+    fun `a failed read keeps the last number rather than dropping to zero`() {
+        // A moment with no connectivity is not everybody logging off.
+        api.servers = RustServerListDto(listOf(RustServerDto(id = "a", online = true, players = 7)))
+        val vm = viewModel()
+        vm.refresh(installed = true)
+
+        api.error = IOException("offline")
+        vm.refresh(installed = true)
+
+        assertEquals(7, vm.online.value)
+    }
+}

app/src/test/java/com/runicgateway/app/ui/rust/RustDtoTest.kt

@@ -0,0 +1,105 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.ui.rust
+
+import com.runicgateway.app.data.api.dto.RustEventDto
+import com.runicgateway.app.data.api.dto.RustServerListDto
+import kotlinx.serialization.json.Json
+import org.junit.Assert.assertEquals
+import org.junit.Assert.assertFalse
+import org.junit.Assert.assertNull
+import org.junit.Assert.assertTrue
+import org.junit.Test
+
+/**
+ * Decoding what the module actually answers with (M14).
+ *
+ * The JSON here is copied from `module-rust`'s own shape functions rather than
+ * invented, because the only thing worth testing about a DTO is whether it agrees
+ * with the other end.
+ */
+class RustDtoTest {
+
+    private val json = Json { ignoreUnknownKeys = true }
+
+    @Test
+    fun `an unreachable server decodes with everything it last said`() {
+        // The phase criterion in one object: `online: false`, `stale: true`, and
+        // every descriptive field still populated. This is what makes a page that
+        // renders while the game is off possible at all.
+        val list = json.decodeFromString<RustServerListDto>(
+            """
+            {"servers":[{
+              "id":"main","name":"Main","online":false,"players":0,"maxPlayers":100,
+              "hostname":"Main | Vanilla","level":"Procedural Map","worldSize":4000,
+              "seed":1934567,"wipeId":"w-2026-09-04","wipedAt":"2026-09-04T18:00:00.000Z",
+              "lastSeenAt":"2026-09-14T10:12:00.000Z","updatedAt":"2026-09-16T13:59:30.000Z",
+              "stale":true
+            }]}
+            """.trimIndent(),
+        )
+
+        val server = list.servers.single()
+        assertFalse(server.online)
+        assertTrue(server.stale)
+        assertEquals("Procedural Map", server.level)
+        assertEquals(4000, server.worldSize)
+        // The two timestamps are two facts and both survive the wire.
+        assertEquals("2026-09-14T10:12:00.000Z", server.lastSeenAt)
+        assertEquals("2026-09-16T13:59:30.000Z", server.updatedAt)
+    }
+
+    @Test
+    fun `a server that has never connected decodes with nulls, not zeroes`() {
+        val list = json.decodeFromString<RustServerListDto>(
+            """{"servers":[{"id":"new","name":"New","online":false,"players":0,"maxPlayers":0,
+               "hostname":null,"level":null,"worldSize":null,"seed":null,"wipeId":null,
+               "wipedAt":null,"lastSeenAt":null,"updatedAt":null,"stale":true}]}""",
+        )
+
+        val server = list.servers.single()
+        assertNull(server.level)
+        assertNull(server.worldSize)
+        assertNull(server.lastSeenAt)
+    }
+
+    @Test
+    fun `an unknown field does not break decoding`() {
+        // Protocol 2 is not the last one. A later plugin adds fields to a frame's
+        // envelope and an older app must keep reading the rest.
+        val list = json.decodeFromString<RustServerListDto>(
+            """{"servers":[{"id":"main","name":"Main","somethingNew":{"a":1}}],"alsoNew":7}""",
+        )
+
+        assertEquals("main", list.servers.single().id)
+    }
+
+    @Test
+    fun `a frame keeps whatever the plugin wrote`() {
+        val event = json.decodeFromString<RustEventDto>(
+            """{"id":9,"kind":"player.death","t":1789574400000,"wipeId":"w1","steamId":"765",
+               "frame":{"name":"Bob","attackerType":"player","attackerName":"Alice","distance":42.4}}""",
+        )
+
+        assertEquals("player.death", event.kind)
+        assertEquals(1789574400000L, event.t)
+        assertEquals("Alice", event.str("attackerName"))
+        assertEquals(42.4, event.num("distance")!!, 0.001)
+        assertNull("an absent field is null, not empty", event.str("weapon"))
+        assertFalse(event.flag("sleeping"))
+    }
+
+    @Test
+    fun `a frame with no fields at all still decodes`() {
+        // `server.initialized` carries an envelope and nothing else, and the model
+        // answers an EMPTY frame for a stored row whose JSON will not parse —
+        // deliberately, so one bad row does not fail a whole page.
+        val event = json.decodeFromString<RustEventDto>(
+            """{"id":1,"kind":"server.initialized","t":1,"frame":{}}""",
+        )
+
+        assertNull(event.str("name"))
+        assertEquals(FeedTone.SERVER, describe(event).tone)
+    }
+}

app/src/test/java/com/runicgateway/app/ui/rust/RustFeedTest.kt

@@ -0,0 +1,140 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.ui.rust
+
+import com.runicgateway.app.data.api.dto.RustEventDto
+import kotlinx.serialization.json.Json
+import kotlinx.serialization.json.JsonObject
+import org.junit.Assert.assertEquals
+import org.junit.Assert.assertNull
+import org.junit.Assert.assertTrue
+import org.junit.Test
+
+/**
+ * What a feed row says (M14).
+ *
+ * The frames here are the shapes the bridge plugin actually emits, written as
+ * JSON rather than built with a DTO constructor — the whole point of the untyped
+ * `frame` is that the app reads names off the wire, and a test that bypassed the
+ * parse would prove nothing about the names.
+ */
+class RustFeedTest {
+
+    private fun row(kind: String, frame: String = "{}", t: Long = 1_000): RustEventDto =
+        RustEventDto(id = 1, kind = kind, t = t, frame = Json.parseToJsonElement(frame) as JsonObject)
+
+    @Test
+    fun `a player kill names the killer, the victim and the weapon`() {
+        val line = describe(
+            row(
+                "player.death",
+                """{"name":"Bob","attackerType":"player","attackerName":"Alice","weapon":"rifle.ak","distance":42.4}""",
+            ),
+        )
+
+        assertEquals(FeedTone.KILL, line.tone)
+        assertEquals("Alice", line.actor)
+        assertEquals("killed", line.verb)
+        assertEquals("Bob", line.subject)
+        assertTrue(line.detail.contains("with rifle ak"))
+        assertTrue(line.detail.contains("42m"))
+    }
+
+    @Test
+    fun `a fall is a death by nobody, not a kill`() {
+        // The failure this distinction exists to avoid: `HitInfo` is legitimately
+        // null when the world kills somebody, so an ABSENT attacker type is the
+        // environment case rather than a missing field. Reporting it as a kill by
+        // nobody is the bug.
+        val line = describe(row("player.death", """{"name":"Bob"}"""))
+
+        assertEquals(FeedTone.DEATH, line.tone)
+        assertEquals("Bob", line.actor)
+        assertEquals("died", line.verb)
+        assertNull(line.subject)
+    }
+
+    @Test
+    fun `an NPC kill reads the prefab as words`() {
+        val line = describe(
+            row("player.death", """{"name":"Bob","attackerType":"npc","attackerName":"patrolhelicopter"}"""),
+        )
+
+        assertEquals("patrolhelicopter", line.actor)
+        assertEquals("Bob", line.subject)
+    }
+
+    @Test
+    fun `a suicide names one person once`() {
+        val line = describe(row("player.death", """{"name":"Bob","attackerType":"self"}"""))
+
+        assertEquals("Bob", line.actor)
+        assertNull(line.subject)
+    }
+
+    @Test
+    fun `chat puts the colon in the join, never in the message`() {
+        val line = describe(row("player.chat", """{"name":"Bob","message":"see you in september"}"""))
+
+        assertEquals(": ", line.join)
+        assertEquals("see you in september", line.verb)
+    }
+
+    @Test
+    fun `a disconnect with no session reports only the reason`() {
+        // The plugin OMITS `sessionSec` for a player who was already connected when
+        // it loaded, so an absent value means "unknown" and must not become "after
+        // 0s" — which is what a DTO default of zero would produce if it were read
+        // without this guard.
+        val line = describe(row("player.disconnected", """{"name":"Bob","reason":"Disconnected"}"""))
+
+        assertEquals("Disconnected", line.detail)
+    }
+
+    @Test
+    fun `a JSON null field does not become the word null`() {
+        // A primitive's `content` is literally "null" for a JSON null, and the
+        // plugin writes explicit nulls — so a naive read puts the four letters
+        // into a killfeed line.
+        val line = describe(row("player.disconnected", """{"name":"Bob","reason":null,"sessionSec":null}"""))
+
+        assertEquals("", line.detail)
+    }
+
+    @Test
+    fun `an unknown kind renders as itself rather than vanishing`() {
+        // A later protocol adds kinds and an operator's module may be older than
+        // their game host. The server's allowlist has already decided the row may
+        // be seen; dropping it here would be the screen quietly saying less than
+        // the truth.
+        val line = describe(row("player.teleported", """{"name":"Bob"}"""))
+
+        assertEquals(FeedTone.OTHER, line.tone)
+        assertEquals("player.teleported", line.verb)
+        assertEquals("Bob", line.actor)
+    }
+
+    @Test
+    fun `the tally kind is not in the feed's own list`() {
+        // It is an aggregate the plugin flushes every sixty seconds per active
+        // player, so a feed carrying it would be mostly wood counts. It is the
+        // leaderboard's input.
+        assertTrue("player.tally" !in FEED_KINDS)
+    }
+
+    @Test
+    fun `every filter asks for kinds the feed knows`() {
+        for (filter in FEED_FILTERS) {
+            assertTrue(
+                "${filter.id} asks for a kind the feed does not list",
+                FEED_KINDS.containsAll(filter.kinds),
+            )
+        }
+    }
+
+    @Test
+    fun `an unknown filter id falls back to everything`() {
+        assertEquals(FEED_KINDS, kindsFor("nonsense"))
+    }
+}

app/src/test/java/com/runicgateway/app/ui/rust/RustFormatTest.kt

@@ -0,0 +1,134 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.ui.rust
+
+import org.junit.Assert.assertEquals
+import org.junit.Assert.assertNull
+import org.junit.Assert.assertTrue
+import org.junit.Test
+import java.time.Instant
+import java.time.ZoneId
+import java.util.Locale
+
+/** Formatting rules the Rust screens depend on (M14). */
+class RustFormatTest {
+
+    private val utc = ZoneId.of("UTC")
+    private val uk = Locale.UK
+    private val now = Instant.parse("2026-09-16T14:00:00Z")
+
+    @Test
+    fun `a row from today is a bare time`() {
+        val stamp = Instant.parse("2026-09-16T09:05:00Z").toEpochMilli()
+        val text = feedClock(value = null, epochMillis = stamp, now = now, zone = utc, locale = uk)
+
+        assertTrue(text, ':' in text)
+        assertTrue("today's row should carry no date: $text", "Sep" !in text)
+    }
+
+    @Test
+    fun `a row from another day carries its date`() {
+        // The defect this rule exists for: the feed can be filtered to a past
+        // wipe, and three events from six weeks ago all rendered as `02:03 PM`
+        // read as this afternoon. The boundary is the CALENDAR day, not a
+        // duration, because that is what a reader means by "what time was that".
+        val stamp = Instant.parse("2026-08-05T09:05:00Z").toEpochMilli()
+        val text = feedClock(value = null, epochMillis = stamp, now = now, zone = utc, locale = uk)
+
+        assertTrue("an older row should carry a date: $text", "Aug" in text)
+    }
+
+    @Test
+    fun `yesterday is another day even when it is minutes ago`() {
+        val justBeforeMidnight = Instant.parse("2026-09-15T23:58:00Z").toEpochMilli()
+        val shortlyAfter = Instant.parse("2026-09-16T00:02:00Z")
+        val text = feedClock(
+            value = null,
+            epochMillis = justBeforeMidnight,
+            now = shortlyAfter,
+            zone = utc,
+            locale = uk,
+        )
+
+        assertTrue("four minutes ago but a different day: $text", "Sep" in text)
+    }
+
+    @Test
+    fun `an unparseable stamp is empty rather than a guess`() {
+        assertEquals("", feedClock(value = null, epochMillis = null, now = now, zone = utc, locale = uk))
+        assertEquals("", feedClock(value = "not a date", now = now, zone = utc, locale = uk))
+    }
+
+    @Test
+    fun `a zoneless DATETIME is read as UTC`() {
+        // Express serializes a Date to ISO with a `Z`, but these values start life
+        // as MariaDB DATETIME columns and one read back as a string reaches the
+        // wire with no zone at all. Reading it as local time silently shifts every
+        // timestamp by the device's offset — a bug that looks right on the machine
+        // it was written on.
+        val text = feedClock(
+            value = "2026-08-05 09:05:00",
+            now = now,
+            zone = utc,
+            locale = uk,
+        )
+
+        assertTrue(text, "Aug" in text)
+        assertTrue(text, "09:05" in text)
+    }
+
+    @Test
+    fun `a server that has never reported has no ago line at all`() {
+        // Null rather than the word "never", so the caller decides what that looks
+        // like — on this surface a server that has never reported is a real and
+        // ordinary state, not a missing value to apologise for.
+        assertNull(rustAgo(null, now))
+        assertNull(rustAgo("", now))
+    }
+
+    @Test
+    fun `under a minute says just now rather than in zero seconds`() {
+        assertEquals("just now", rustAgo("2026-09-16T13:59:40Z", now))
+    }
+
+    @Test
+    fun `ago picks the largest unit that fits`() {
+        assertEquals("3 minutes ago", rustAgo("2026-09-16T13:57:00Z", now))
+        assertEquals("2 hours ago", rustAgo("2026-09-16T12:00:00Z", now))
+        assertEquals("1 day ago", rustAgo("2026-09-15T14:00:00Z", now))
+    }
+
+    @Test
+    fun `playtime drops seconds above a minute and keeps them below`() {
+        assertEquals("—", playtime(null))
+        assertEquals("—", playtime(0))
+        assertEquals("40s", playtime(40))
+        assertEquals("12m", playtime(12 * 60))
+        assertEquals("4h 12m", playtime(4 * 3600 + 12 * 60))
+        assertEquals("2h", playtime(2 * 3600))
+    }
+
+    @Test
+    fun `a prefab reads as words without a lookup table`() {
+        assertEquals("rifle ak", prefabName("rifle.ak"))
+        assertEquals("patrolhelicopter", prefabName("patrolhelicopter"))
+        assertEquals("", prefabName(null))
+    }
+
+    @Test
+    fun `a nameless player shows a shortened id, not the word unknown`() {
+        // A steam id is not a name and does not look like one, which is the point:
+        // the plugin knows an id before it knows anything else, and "Unknown" would
+        // lose the only identifier there is.
+        assertEquals("…345678", playerLabel(null, "76561198012345678"))
+        assertEquals("Bob", playerLabel("Bob", "76561198012345678"))
+        assertEquals("…345678", playerLabel("  ", "76561198012345678"))
+    }
+
+    @Test
+    fun `a short id is left whole`() {
+        assertEquals("1234", shortSteamId("1234"))
+        assertEquals("", shortSteamId(null))
+    }
+}

app/src/test/java/com/runicgateway/app/ui/rust/RustServerViewModelTest.kt

@@ -0,0 +1,193 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.ui.rust
+
+import androidx.lifecycle.SavedStateHandle
+import com.runicgateway.app.data.api.dto.RustLeaderboardDto
+import com.runicgateway.app.data.api.dto.RustLeaderboardRowDto
+import com.runicgateway.app.data.api.dto.RustOnlineDto
+import com.runicgateway.app.data.api.dto.RustPresenceDto
+import com.runicgateway.app.data.api.dto.RustServerDto
+import com.runicgateway.app.data.api.dto.RustServerResponse
+import com.runicgateway.app.data.api.dto.RustWipeDto
+import com.runicgateway.app.data.api.dto.RustWipeListDto
+import com.runicgateway.app.data.api.fake.FakeRustApi
+import com.runicgateway.app.data.repository.RustRepository
+import com.runicgateway.app.ui.UiState
+import com.runicgateway.app.util.MainDispatcherRule
+import okhttp3.ResponseBody.Companion.toResponseBody
+import org.junit.Assert.assertEquals
+import org.junit.Assert.assertNull
+import org.junit.Assert.assertTrue
+import org.junit.Rule
+import org.junit.Test
+import retrofit2.HttpException
+import retrofit2.Response
+import java.io.IOException
+
+/** One server's page: what it asks for, and when (M14). */
+class RustServerViewModelTest {
+
+    @get:Rule
+    val dispatcherRule = MainDispatcherRule()
+
+    private val api = FakeRustApi()
+    private val repository = RustRepository(api)
+
+    private fun viewModel(id: String = "main") = RustServerViewModel(
+        repository,
+        SavedStateHandle(mapOf("serverId" to id)),
+    )
+
+    @Test
+    fun `it opens on the feed and asks for nothing else`() {
+        api.server = RustServerResponse(RustServerDto(id = "main", name = "Main"))
+
+        val vm = viewModel()
+
+        assertEquals(RustTab.FEED, vm.state.value.tab)
+        assertEquals(1, api.eventCalls)
+        assertEquals(0, api.leaderboardCalls)
+        assertEquals(0, api.onlineCalls)
+        assertEquals(0, api.wipeCalls)
+    }
+
+    @Test
+    fun `all time sends no wipe parameter at all`() {
+        // `?wipe=` asks for a wipe whose id is the empty string and answers
+        // nothing, with no error to notice. An absent parameter must be ABSENT.
+        viewModel()
+
+        assertNull(api.lastFeedWipe)
+    }
+
+    @Test
+    fun `everything sends the whole kind list, and kills sends one`() {
+        val vm = viewModel()
+        assertEquals(FEED_KINDS.joinToString(","), api.lastKind)
+
+        vm.selectFilter("kills")
+        assertEquals("player.death", api.lastKind)
+    }
+
+    @Test
+    fun `a tab is loaded once, not on every visit`() {
+        // Re-asking on every tab switch would put a spinner over a leaderboard the
+        // reader has already read, for an answer that cannot have changed while
+        // they were three taps away.
+        api.leaderboard = RustLeaderboardDto(listOf(RustLeaderboardRowDto(steamId = "1", kills = 3)))
+        val vm = viewModel()
+
+        vm.selectTab(RustTab.LEADERBOARD)
+        vm.selectTab(RustTab.FEED)
+        vm.selectTab(RustTab.LEADERBOARD)
+
+        assertEquals(1, api.leaderboardCalls)
+    }
+
+    @Test
+    fun `the poll asks only for the panel on screen`() {
+        api.online = RustOnlineDto(listOf(RustPresenceDto(steamId = "1")))
+        val vm = viewModel()
+        val feedBefore = api.eventCalls
+
+        vm.selectTab(RustTab.ONLINE)
+        val onlineBefore = api.onlineCalls
+        vm.refresh()
+
+        assertEquals("the feed is not on screen", feedBefore, api.eventCalls)
+        assertEquals(onlineBefore + 1, api.onlineCalls)
+    }
+
+    @Test
+    fun `a poll on a still panel asks for nothing but the server line`() {
+        api.wipes = RustWipeListDto(listOf(RustWipeDto(wipeId = "w1")))
+        val vm = viewModel()
+
+        vm.selectTab(RustTab.WIPES)
+        val wipesBefore = api.wipeCalls
+        val feedBefore = api.eventCalls
+        vm.refresh()
+
+        assertEquals(wipesBefore, api.wipeCalls)
+        assertEquals(feedBefore, api.eventCalls)
+    }
+
+    @Test
+    fun `choosing a wipe re-asks the feed and, if it is loaded, the leaderboard`() {
+        api.leaderboard = RustLeaderboardDto(listOf(RustLeaderboardRowDto(steamId = "1")))
+        val vm = viewModel()
+
+        vm.selectWipe("wipe-1")
+        assertEquals("wipe-1", api.lastFeedWipe)
+        // Nobody has opened the leaderboard, so nothing was fetched for it.
+        assertEquals(0, api.leaderboardCalls)
+
+        vm.selectTab(RustTab.LEADERBOARD)
+        vm.selectWipe("wipe-2")
+        assertEquals("wipe-2", api.lastLeaderboardWipe)
+        assertEquals("wipe-2", api.lastFeedWipe)
+    }
+
+    @Test
+    fun `picking the same wipe twice asks nothing`() {
+        val vm = viewModel()
+        vm.selectWipe("wipe-1")
+        val calls = api.eventCalls
+
+        vm.selectWipe("wipe-1")
+
+        assertEquals(calls, api.eventCalls)
+    }
+
+    @Test
+    fun `opening a wipe from the wipes tab lands on the feed`() {
+        // Picking a wipe there is a navigation as much as a filter: the question is
+        // "what happened during that map", and the answer is the feed.
+        val vm = viewModel()
+        vm.selectTab(RustTab.WIPES)
+
+        vm.openWipe("wipe-1")
+
+        assertEquals(RustTab.FEED, vm.state.value.tab)
+        assertEquals("wipe-1", vm.state.value.selectedWipe)
+    }
+
+    @Test
+    fun `a 404 on the server read is its own state, not a generic error`() {
+        // A mistyped address is not a fault. The screen reads NOT_FOUND and says
+        // "no such server" rather than dressing it as an outage.
+        api.error = HttpException(Response.error<Any>(404, "".toResponseBody(null)))
+
+        val vm = viewModel("typo")
+
+        val state = vm.state.value.server.state
+        assertTrue(state is UiState.Error)
+        assertEquals(404, (state as UiState.Error).httpStatus)
+    }
+
+    @Test
+    fun `a failed poll keeps the server line that was there`() {
+        api.server = RustServerResponse(RustServerDto(id = "main", name = "Main"))
+        val vm = viewModel()
+
+        api.error = IOException("offline")
+        vm.refresh()
+
+        val state = vm.state.value.server.state
+        assertTrue(state is UiState.Success)
+        assertEquals("Main", (state as UiState.Success).data.name)
+        assertTrue(vm.state.value.server.refreshFailed)
+    }
+
+    @Test
+    fun `sorting sends the API's own vocabulary`() {
+        val vm = viewModel()
+        vm.selectTab(RustTab.LEADERBOARD)
+
+        vm.selectSort(RustSort.PLAYTIME)
+
+        assertEquals("playtime", api.lastSort)
+    }
+}

app/src/test/java/com/runicgateway/app/util/FakeInboxCache.kt

@@ -0,0 +1,49 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.util
+
+import com.runicgateway.app.core.inbox.InboxCache
+import com.runicgateway.app.data.api.dto.NotificationItemDto
+
+/**
+ * In-memory [InboxCache] for the inbox view-model tests — the same shape of stand-in
+ * `SessionManagerTest` uses for the encrypted token store.
+ *
+ * It keeps the real implementation's ONE load-bearing rule: a snapshot is handed
+ * back only to the owner that wrote it. A fake that ignored the key would let the
+ * cross-account test pass against a cache that leaks.
+ */
+class FakeInboxCache : InboxCache {
+
+    private var owner: String? = null
+    private var snapshot: InboxCache.Snapshot? = null
+
+    var writes: Int = 0
+    var cleared: Int = 0
+
+    override suspend fun read(owner: String): InboxCache.Snapshot? =
+        if (this.owner == owner) snapshot else null
+
+    override suspend fun write(owner: String, items: List<NotificationItemDto>, unread: Int) {
+        writes++
+        this.owner = owner
+        snapshot = InboxCache.Snapshot(
+            items = items.take(InboxCache.MAX_ITEMS),
+            unread = unread,
+            savedAt = 1_700_000_000_000,
+        )
+    }
+
+    override suspend fun clear() {
+        cleared++
+        owner = null
+        snapshot = null
+    }
+
+    /** Seed a snapshot as if a previous session had pulled one. */
+    suspend fun seed(owner: String, items: List<NotificationItemDto>, unread: Int) {
+        write(owner, items, unread)
+        writes = 0
+    }
+}