feat(events): the app's events screens, and the module rows that were never gated (Phase 14b)

Events Phase 14b, the app half — recorded as M13 in docs/android/PLAN.md.

Four screens on the four routes Phase 14a shipped: the public calendar, an event
page carrying `?run=`, an arc, and participation history. One drawer row for the
history, at SIGNED_IN rather than PLAYER: the route is `requireAuth` alone and
self-scoped, and the website needed two mounts for it only because `RequirePlayer`
guards `/account` there.

The prerequisite fix is the larger half. The app read `/public/modules` nowhere
and mapped every `/public/shard/features` failure to "unknown", which `canSee`
treats as visible — so on a site with no `uo` module every shard row rendered and
every one of them 404'd. Absence of an answer is not an answer of absence: a
successful module list that omits `shard` hides the rows, a failed read keeps the
last answer the host gave, and a host that has never answered leaves the gate
open. Capability and feature compose as two gates and answer different questions:
whether the module is installed (per host) and whether this shard publishes the
surface to this viewer (per viewer).

Also corrects the website path → route table, wrong since the module-system
cutover on 2026-08-12: core's NAV is eight rows, not sixteen, and the nine shard
rows moved to `/uo/*`. A nav override on any shard row was ignored, an added link
to one handed off to a browser, and the sort-key line was wrong. Two existing
tests had been passing vacuously since that day.

An inbox link to an event now opens the app rather than a Custom Tab, through
`resolveWebPath` rather than a second mechanism — so its "a query hands off" rule
gains exactly one exception, `run` on an event page.

The emulator walk found three defects that 563 green tests did not:

- the three player game-data rows read `/player/shard/*` and were not gated, so
  they rendered and 404'd; the test meant to catch that asked whether every row
  *with a feature* declared the capability, and those three have none. It now
  asks by route.
- `score` is DECIMAL(18,4) and was declared an integer, so one `318.5` made
  kotlinx refuse the entire body and a 200 rendered as a server error — latent on
  the public results table for every visitor.
- a drawer route's view model outlives a sign-out, so signing in as a second
  account showed it the first account's participation history with no request
  made at all.

570 tests, 0 failures.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_016wDDVXWMDz82WqE1i969r4

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/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/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/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/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/SiteCapabilitiesRepository.kt

@@ -0,0 +1,164 @@
+/*
+ * 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"
+
+    /** 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

@@ -15,6 +15,7 @@ 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
@@ -122,6 +123,15 @@ 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)
+
     /** Opt-in push devices + subscriptions (§11, M7) — bearer-authed on the main client. */
     @Provides
     @Singleton

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/RunicApp.kt

@@ -64,6 +64,10 @@ 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
@@ -110,6 +114,10 @@ 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,
     Routes.PLAYER_CHARACTERS, Routes.PLAYER_VENDORS, Routes.PLAYER_HOUSES,
     Routes.ADMIN_DASHBOARD, Routes.ADMIN_CONTENT, Routes.ADMIN_MODERATION, Routes.ADMIN_SUPPORT,
 )
@@ -141,6 +149,9 @@ 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),
     // and re-read the unread count with it: a tickle that arrived while the app was
@@ -178,7 +189,7 @@ 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
@@ -478,6 +489,50 @@ 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(
@@ -586,6 +641,10 @@ private fun RunicNavHost(
             when (session) {
                 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) }
             }

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 +88,84 @@ 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(
-    MenuEntry(Routes.ATLAS, R.string.menu_atlas, feature = ShardFeature.ATLAS),
+        Routes.SHARD_RULES,
-    MenuEntry(Routes.SHARD_LEADERBOARDS, R.string.menu_leaderboards, feature = ShardFeature.LEADERBOARDS),
+        R.string.menu_rules,
-    MenuEntry(Routes.SHARD_MARKET, R.string.menu_market, feature = ShardFeature.MARKET),
+        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,
+    ),
     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),
+    // Participation history: SIGNED_IN, not PLAYER. The route is `requireAuth`
-    MenuEntry(Routes.PLAYER_VENDORS, R.string.menu_my_vendors, MenuAccess.PLAYER),
+    // alone and self-scoped on the caller's own id, and the website needed two
-    MenuEntry(Routes.PLAYER_HOUSES, R.string.menu_my_houses, MenuAccess.PLAYER),
+    // 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 +174,33 @@ val APP_MENU: List<MenuEntry> = listOf(
 )
 
 /**
- * The entries the given [session] may see, given the shard [features] it may reach.
+ * The entries the given [session] may see, on a backend with these [capabilities]
- * Pure + side-effect-free so the gating is unit-tested without Compose.
+ * 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
+ *    publishes to this viewer (M11). Per viewer.
- *    every shard entry shows; see [canSee] for why that direction is deliberate.
+ *
+ * **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 +210,7 @@ fun isEntryVisible(
     entry: MenuEntry,
     session: Session,
     features: ShardFeatures? = null,
+    capabilities: SiteCapabilities? = null,
 ): Boolean {
     val allowedByRole = when (entry.access) {
         MenuAccess.PUBLIC -> true
@@ -129,5 +219,7 @@ 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 +11,68 @@ 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' },
+ *   ],
+ * })
+ * ```
+ *
+ * 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 +92,33 @@ 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),
 )
 
 /**
@@ -134,6 +174,11 @@ 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.
+    "uo",
 )
 
 /**
@@ -153,16 +198,17 @@ 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
  * // CMS pages: top-level /:slug, matched only after the named routes above
  * <Route path="/:slug" element={<CmsPage />} />
  * ```
@@ -177,19 +223,31 @@ 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)
+ * /uo/<shard surface>             → the mapped shard route (§6.2)
- * /site/atlas/<slug>              → ATLAS_CREATURE
+ * /uo/atlas/<slug>                → ATLAS_CREATURE
- * /site/market/vendors/<serial>   → SHARD_MARKET_VENDOR
+ * /uo/market/vendors/<serial>     → SHARD_MARKET_VENDOR
  * /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
+ * **A path carrying a query or a fragment hands off — with exactly one
- * says. No app route takes either, so a native match would quietly drop what the
+ * exception.** The rule exists because no app route took either, so a native
- * admin wrote; the browser honors it exactly.
+ * 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 +255,70 @@ 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
+    val raw = path?.trim().orEmpty()
-    if (normalized.any { it == '?' || it == '#' }) return null
+    // A fragment is never honored natively: no app route has one to put it in.
-    WEB_PATH_TO_ROUTE[normalized]?.let { return it }
+    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[0] == "site" && segments.size == 3 && segments[1] == "newsletter" ->
-        segments.size == 3 && segments[1] == "newsletter" ->
             Routes.post(PostCategory.NEWSLETTER.urlSlug, segments[2])
-        segments.size == 3 && segments[1] == "atlas" -> Routes.atlasCreature(segments[2])
+        segments[0] == "site" && segments.size == 4 && segments[1] == "events" &&
-        segments.size == 4 && segments[1] == "market" && segments[2] == "vendors" ->
+            segments[2] == "series" -> Routes.eventSeries(segments[3])
-            Routes.marketVendor(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])
         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"

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

@@ -47,6 +47,29 @@ object Routes {
     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"
+
     /** Public shard hub (§6.2). */
     const val SHARD = "shard"
 
@@ -97,6 +120,7 @@ object Routes {
         const val CATEGORY = "category"
         const val ID_OR_SLUG = "idOrSlug"
         const val SERIAL = "serial"
+        const val RUN = "run"
     }
 
     fun page(slug: String) = "page/$slug"
@@ -119,6 +143,21 @@ object Routes {
     /** One creature's atlas page, by slug. */
     fun atlasCreature(slug: String) = "atlas/$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;
@@ -135,9 +174,19 @@ 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 }`.
      *

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

@@ -3,8 +3,7 @@
  */
 package com.runicgateway.app.ui.notifications
 
-import java.time.Instant
+import com.runicgateway.app.core.time.parseWireInstant
-import java.time.LocalDateTime
 import java.time.ZoneId
 import java.time.format.DateTimeFormatter
 import java.time.format.FormatStyle
@@ -14,11 +13,8 @@ import java.time.format.FormatStyle
  * 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.** Express serializes a `Date` to ISO-8601 with a `Z`, but the value
+ * decide** — see [parseWireInstant], which owns that trap for every screen that
- * starts life as a MariaDB `DATETIME`, and a column read back as a string reaches
+ * reads a timestamp, this one and the event screens (M13).
- * the wire as `2026-08-31 07:13:50` with no zone at all. A zoneless stamp is read
- * as UTC — that is what the server stores — rather than as local time, which
- * would silently shift every timestamp by the device's offset.
  *
  * Anything unparseable returns null and the row simply shows no stamp: a
  * notification with an odd date is still worth reading.
@@ -29,25 +25,10 @@ fun inboxTimestamp(
     formatter: DateTimeFormatter =
         DateTimeFormatter.ofLocalizedDateTime(FormatStyle.MEDIUM, FormatStyle.SHORT),
 ): String? {
-    val instant = parseInstant(raw) ?: return null
+    val instant = parseWireInstant(raw) ?: return null
     return try {
         formatter.withZone(zone).format(instant)
     } catch (_: Exception) {
         null
     }
 }
-
-private fun parseInstant(raw: String): Instant? {
-    val text = raw.trim()
-    if (text.isEmpty()) return null
-    return try {
-        Instant.parse(text)
-    } catch (_: Exception) {
-        try {
-            // No zone on the wire → UTC, because that is what the server stored.
-            LocalDateTime.parse(text.replace(' ', 'T')).atZone(ZoneId.of("UTC")).toInstant()
-        } catch (_: Exception) {
-            null
-        }
-    }
-}

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

@@ -63,6 +63,7 @@ import com.runicgateway.app.ui.components.ShardCard
 @Composable
 fun InboxScreen(
     onOpenSettings: () -> Unit,
+    onOpenRoute: (String) -> Unit,
     modifier: Modifier = Modifier,
     viewModel: InboxViewModel = hiltViewModel(),
 ) {
@@ -119,10 +120,18 @@ fun InboxScreen(
                     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,
+                        // its own — and the ones that do carry a SITE-RELATIVE path.
-                        // so the view model resolves it against the configured shard
+                        //
-                        // before anything is opened.
+                        // A path the app has a screen for opens natively (M13): an
-                        viewModel.linkFor(item)?.let { WebHandoff.open(context, it) }
+                        // 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) }
+                        }
                     },
                 )
             }

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

@@ -14,6 +14,7 @@ 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
@@ -220,6 +221,38 @@ class InboxViewModel @Inject constructor(
         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.
      *

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

@@ -41,6 +41,7 @@
     <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_rules">Rules</string>
@@ -50,6 +51,7 @@
     <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>
@@ -525,4 +527,43 @@
     <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>
 </resources>

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/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/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/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 +44,24 @@ 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(
+     * The public block once a stored row has made the merge sort it — the website's
-        Routes.HOME, Routes.NEWS, Routes.WIKI, Routes.SHARD, Routes.SHARD_RULES,
+     * number line, not the app's coded order.
-        Routes.ATLAS, Routes.SHARD_LEADERBOARDS, Routes.SHARD_MARKET, Routes.page("about"),
+     *
+     * **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.
+     */
+    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,
     )
 
+    /** 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 +83,7 @@ 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 +97,7 @@ 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 +105,16 @@ 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 +126,7 @@ 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 +142,7 @@ 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 +154,50 @@ class NavOverridesTest {
     // ── Order ────────────────────────────────────────────────────────────
 
     @Test fun anExplicitOrderMovesTheRowWithinThePublicBlock() {
-        // The website's own indices: About is 15 and Home is 0, so swapping them
+        // The website's own indices: About is 7, and Market — the last row of all,
-        // is what an admin dragging About to the top writes.
+        // now that the module's nine append after core's eight — is 16. 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 = 17),
             ),
         )
 
         assertEquals(
             listOf(
-                Routes.page("about"), Routes.NEWS, Routes.WIKI, Routes.SHARD, Routes.SHARD_RULES,
+                Routes.page("about"), Routes.NEWS, Routes.EVENTS, Routes.WIKI, Routes.SHARD,
-                Routes.ATLAS, Routes.SHARD_LEADERBOARDS, Routes.SHARD_MARKET, Routes.HOME,
+                Routes.SHARD_RULES, Routes.ATLAS, Routes.SHARD_LEADERBOARDS, Routes.SHARD_MARKET,
+                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
+        // explicit 6 meets Wiki's implicit 6 (its index in the site's nav, where
-        // the three news categories sit between News and Wiki). Explicit wins.
+        // Events and the three news categories sit between News and Wiki). Explicit
-        val routes = routes(nav("/site/about" to entry(order = 5)))
+        // 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),
+            listOf(Routes.HOME, Routes.NEWS, Routes.EVENTS, Routes.page("about"), Routes.WIKI),
-            routes.take(4),
+            routes.take(5),
         )
     }
 
     @Test fun theAppsOwnRowsKeepTheirCodedOrderAfterThePublicBlock() {
-        // Contact, Account, Notifications, the three player groups and the four
+        // Contact, Account, Notifications, My Events, the three player groups and
-        // staff rows have no website counterpart to be reordered against (§6.2).
+        // the four staff rows have no website counterpart to be reordered against
-        val tail = APP_MENU.drop(9).map { it.route }
+        // (§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 +244,7 @@ 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
+        // Core's eight rows plus module-uo's nine, both quoted in NavPaths.kt. If
-        // site adds one, this is the test that says so — a path with no mapping is
+        // either side adds one, this is the test that says so — a path with no
-        // silently unresolvable in phase 6's link handling.
+        // mapping is silently unresolvable in phase 6's link handling, which is
-        assertEquals(16, WEBSITE_PUBLIC_NAV.size)
+        // exactly how the nine shard rows went stale for a month after the
+        // module-system cutover moved them from /site/ to /uo/ (M13).
+        assertEquals(17, 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.
@@ -34,15 +48,20 @@ 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(2, WEB_ROUTE_ORDER[Routes.EVENTS])
-        assertEquals(15, WEB_ROUTE_ORDER[Routes.page("about")])
+        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() {
+    @Test fun theDrawerRowsAreTheIntersectionWithAppMenu() {
-        // Nine of the sixteen have a drawer row. The other seven are mapped but not
+        // Ten of the seventeen 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).
         val coded = APP_MENU.map { it.route }.toSet()
@@ -50,8 +69,8 @@ class NavPathsTest {
 
         assertEquals(
             listOf(
-                "/", "/site/news", "/wiki", "/site/shard", "/site/rules",
+                "/", "/site/news", "/site/events", "/wiki", "/site/about",
-                "/site/atlas", "/site/leaderboards", "/site/market", "/site/about",
+                "/uo/shard", "/uo/rules", "/uo/atlas", "/uo/leaderboards", "/uo/market",
             ),
             surfaced,
         )
@@ -62,7 +81,7 @@ 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 +132,13 @@ 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 +151,71 @@ 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.atlasCreature("dragon"), resolveWebPath("/uo/atlas/dragon"))
-        assertEquals(Routes.marketVendor("0x24C"), resolveWebPath("/site/market/vendors/0x24C"))
+        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 +238,18 @@ 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
+        // No app route but the event page takes either, so a native match would
-        // admin wrote. The browser honors it exactly.
+        // 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 +166,15 @@ class NavTreeTest {
 
         val shape = tree(row).shape()
 
-        // Eight public rows are left at the top level (Wiki moved into the section),
+        // Nine 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("section:lore", shape[9])
-        assertEquals(Routes.CONTACT, shape[9])
+        assertEquals(Routes.CONTACT, shape[10])
     }
 
     @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 +252,7 @@ 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 +324,9 @@ 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])
+        // Market, not About: the module's nine rows append after core's eight on the
+        // website's number line, so Market is the last coded row rather than About.
+        assertEquals(Routes.SHARD_MARKET, shape[shape.indexOf("link:a") - 1])
     }
 
     @Test fun aLinksOrderPlacesItAmongTheCodedRows() {
@@ -364,7 +366,7 @@ 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 +382,7 @@ 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 +402,7 @@ 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 +420,7 @@ 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/notifications/InboxViewModelTest.kt

@@ -193,4 +193,50 @@ class InboxViewModelTest {
         assertNull(vm.linkFor(item(1).copy(url = "javascript:alert(1)")))
         assertNull(vm.linkFor(item(1).copy(url = "intent://evil#Intent;end")))
     }
+
+    // ── 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)")))
+    }
 }