Merge pull request 'fix(android/resilience): auto-recover failed loads on reconnect' (#106 ) from dev into main

test(android/library): stub SyncController.lastSyncError with a real StateFlow
The VM now combines lastSyncError into uiState; a relaxed-mock flow never emits, so the combine never fired and the state sat at Loading. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01TsF3cNoKrqCYsU78cXC8U6
2026-07-02 16:45:13 -04:00 · 2026-07-02 16:10:45 -04:00 · 2026-07-02 16:02:14 -04:00 · 2026-06-30 19:19:15 -04:00 · 2026-06-30 19:15:12 -04:00 · 2026-06-30 18:48:35 -04:00
107 changed files with 3296 additions and 615 deletions
@@ -2,8 +2,8 @@ name: release

 # Builds and pushes the minstrel container image to the Gitea registry.
 #
-#   push to main             → :main and :latest (no APK bundled)
-#   push tag vYYYY.MM.DD     → :vYYYY.MM.DD and :latest (APK bundled)
+#   push to main             → :main and :latest (latest-release APK bundled)
+#   push tag vYYYY.MM.DD     → :vYYYY.MM.DD and :latest (freshly-built APK bundled)
 #   workflow_dispatch        → manual trigger (same rules based on the ref)
 #
 # Release model: per-day CalVer tags (no trailing patch digit). The day's
@@ -20,6 +20,14 @@ name: release
 # happens in the same android-release job, so the Release-page download
 # link and the in-image bundled APK are both populated atomically.
 #
+# :latest always carries an APK. Because every main push also moves
+# :latest (not just tags), a main build with no APK would silently strip
+# the in-app update channel off :latest until the next release. So on
+# non-tag builds image-release pulls the MOST RECENT release's signed APK
+# and reconstructs its exact versionName (tag + commit-count, the same
+# formula android-release bakes in) for the version sidecar — no rebuild,
+# just rebundle. Tag builds keep bundling their own freshly-built APK.
+#
 # Android testing (lint + detekt + unit tests, debug APK upload on main)
 # lives in android.yml and runs independently on every push.

@@ -181,6 +189,12 @@ jobs:
    steps:
      - name: Checkout
        uses: actions/checkout@v4
+        with:
+          # Full history + tags so non-tag :latest builds can resolve the
+          # latest release tag's commit count and reconstruct the bundled
+          # APK's exact versionName (see "Bundle latest release APK" below).
+          fetch-depth: 0
+          fetch-tags: true

      - name: Detect buildable project
        id: guard
@@ -221,9 +235,8 @@ jobs:
            | docker login git.fabledsword.com -u "${{ github.actor }}" --password-stdin

      - name: Download signed APK artifact
-        # Tag pushes only — android-release just produced this. Main
-        # pushes skip and the image ships with empty client/ (the
-        # /api/client/version endpoint then returns 404 by design).
+        # Tag pushes only — android-release just produced this. Non-tag
+        # builds take the "Bundle latest release APK" path below instead.
        if: steps.guard.outputs.ready == 'true' && startsWith(github.ref, 'refs/tags/v')
        uses: actions/download-artifact@v3
        with:
@@ -247,6 +260,42 @@ jobs:
          echo "${APK_VERSION_NAME}" > client/minstrel.apk.version
          ls -lh client/

+      - name: Bundle latest release APK (non-tag :latest builds)
+        # Main pushes don't build an APK, but they DO move :latest — so
+        # without this the in-app update channel would vanish from :latest
+        # until the next tag. Pull the most-recent release's signed APK and
+        # reconstruct its exact versionName (${TAG#v}.$(git rev-list --count
+        # TAG) — identical to android-release's formula) so the version
+        # sidecar the server hands clients matches the installed build.
+        # Degrades to an empty client/ (404 update channel) — never a wrong
+        # version — if no release / APK asset / tag-count can be resolved.
+        if: steps.guard.outputs.ready == 'true' && !startsWith(github.ref, 'refs/tags/v')
+        shell: bash
+        env:
+          CI_TOKEN: ${{ secrets.CI_TOKEN }}
+        run: |
+          set -eu
+          REPO="${GITHUB_REPOSITORY}"
+          REL_JSON="$(curl -fsSL -H "Authorization: token ${CI_TOKEN}" \
+            "https://git.fabledsword.com/api/v1/repos/${REPO}/releases/latest" || true)"
+          if [ -z "${REL_JSON}" ]; then
+            echo "::notice::no published release — image ships without bundled APK"; exit 0
+          fi
+          TAG="$(printf '%s' "${REL_JSON}" | grep -oP '"tag_name":\s*"\K[^"]+' | head -1)"
+          APK_URL="$(printf '%s' "${REL_JSON}" | grep -oP '"browser_download_url":\s*"\K[^"]+' | grep -E '\.apk$' | head -1)"
+          if [ -z "${TAG}" ] || [ -z "${APK_URL}" ]; then
+            echo "::notice::latest release '${TAG:-?}' has no APK asset — image ships without bundled APK"; exit 0
+          fi
+          COUNT="$(git rev-list --count "${TAG}" 2>/dev/null || true)"
+          if [ -z "${COUNT}" ]; then
+            echo "::notice::could not resolve commit count for ${TAG} (tag not fetched?) — skipping APK bundle"; exit 0
+          fi
+          VERSION_NAME="${TAG#v}.${COUNT}"
+          curl -fsSL -H "Authorization: token ${CI_TOKEN}" -o client/minstrel.apk "${APK_URL}"
+          echo "${VERSION_NAME}" > client/minstrel.apk.version
+          echo "::notice::bundled release APK ${TAG} as version ${VERSION_NAME}"
+          ls -lh client/
+
      - name: Build and push
        if: steps.guard.outputs.ready == 'true'
        run: |
@@ -4,7 +4,7 @@ A self-hosted music server that thinks for you. Smart shuffle, contextual likes,

 > State and intelligence belong on the server, not the client.

-<!-- TODO: screenshot of the home page -->
+<a href="docs/screenshots/home.png"><img src="docs/screenshots/home.png" width="820" alt="Minstrel home — your library at a glance"></a>

 ## Highlights

@@ -13,7 +13,7 @@ A self-hosted music server that thinks for you. Smart shuffle, contextual likes,
 - **ListenBrainz radio.** Session-aware "more like this" pulls from ListenBrainz similarity data, not a static genre tag.
 - **Lidarr integration.** Triggered scans, request-driven album imports, and a quarantine flow when something doesn't fit.
 - **Built-in web SPA.** Full-feature library, search, queue, playlists, and admin — no separate frontend container to deploy.
- **Flutter mobile client in flight.** Tracking issue [#356](https://git.fabledsword.com/bvandeusen/minstrel/issues/356).
+- **Native Android client, shipped with the server.** The signed APK is bundled into every image and attached to each [release](https://git.fabledsword.com/bvandeusen/minstrel/releases) — sideload it once, then the app self-updates straight from your own server (no app store, no separate download to track).

 ## Quickstart

@@ -24,10 +24,18 @@ services:
    image: git.fabledsword.com/bvandeusen/minstrel:latest
    ports: ['4533:4533']
    volumes:
+      # Your music library. Point ./music at wherever your audio files
+      # live. Mounted read-only — Minstrel never writes to your library.
      - ./music:/music:ro
-      - minstrel-data:/data
+      # Generated data: playlist cover collages, artist art, caches.
+      # The path must match MINSTREL_STORAGE_DATA_DIR, which the image
+      # sets to /app/data — keep this mount on /app/data or your cache
+      # won't survive a container recreate.
+      - minstrel-data:/app/data
    environment:
      MINSTREL_DATABASE_URL: postgres://minstrel:minstrel@db:5432/minstrel?sslmode=disable
+      # Colon-separated library roots to scan; must match the container
+      # path of the read-only music mount above (/music here).
      MINSTREL_LIBRARY_SCAN_PATHS: /music
    depends_on: [db]

@@ -37,6 +45,8 @@ services:
      POSTGRES_USER: minstrel
      POSTGRES_PASSWORD: minstrel
      POSTGRES_DB: minstrel
+    # Postgres data dir — users, likes, play history, sessions, settings.
+    # The one volume you must never lose; back it up with pg_dump.
    volumes: [pgdata:/var/lib/postgresql/data]

 volumes:
@@ -48,7 +58,29 @@ volumes:
 docker compose up -d
 ```

-After the stack is up, visit `http://localhost:4533/register` and create your admin account. The first user to register on a fresh instance is automatically marked as the administrator; subsequent users can register through the same form (or via invite tokens generated from the admin Users panel, depending on how you configure registration).
+## First run
+
+With the stack up, a handful of in-app steps get you to a working library. Use your own host in place of `localhost` if you're reaching the server over a LAN/VPN address (plain `http://` is fine — no TLS required).
+
+**1. Create your admin account.** Visit `http://localhost:4533/register`. The first account on a fresh instance is automatically the administrator; later users join through the same form or an invite token (step 5).
+
+<a href="docs/screenshots/register.png"><img src="docs/screenshots/register.png" width="320" alt="Creating the first (admin) account on a fresh instance"></a>
+
+**2. Let the first library scan finish.** `scan_on_startup` is on by default, so Minstrel walks your mounted library on boot and imports artists, albums, and tracks — no button to press. Watch progress (and re-scan any time) on the **Admin** page (`/admin`); the scan runs in stages and is incremental, so later restarts only pick up what changed.
+
+<a href="docs/screenshots/library-scan.png"><img src="docs/screenshots/library-scan.png" width="820" alt="The Admin page, where the library scan runs and reports progress"></a>
+
+**3. (Optional) Name the instance and wire up integrations.** In admin **Settings → Integrations** (`/admin/integrations`), add a ListenBrainz token (scrobbling + similarity radio) and/or a Lidarr URL + API key (the request flow). These live in the UI and apply without a restart; the display name can also be set via `MINSTREL_BRANDING_APP_NAME`.
+
+<a href="docs/screenshots/integrations.png"><img src="docs/screenshots/integrations.png" width="820" alt="ListenBrainz and Lidarr integration cards in admin Settings"></a>
+
+**4. Install the Android app.** Open **Settings** (`/settings`) and use the *Install the Android app* card to download the APK that ships inside this server image, then sign in with the same account. From then on the app self-updates straight from your server.
+
+<a href="docs/screenshots/android-download.png"><img src="docs/screenshots/android-download.png" width="820" alt="The &quot;Install the Android app&quot; download card in Settings"></a>
+
+**5. Invite the rest of the household.** From admin **Users** (`/admin/users`), generate an invite token (or enable open registration). Each person gets their own account, so likes, play history, and recommendations stay per-user.
+
+<a href="docs/screenshots/invite-users.png"><img src="docs/screenshots/invite-users.png" width="820" alt="Generating an invite token in admin Users"></a>

 For the full configuration surface, see [`config.example.yaml`](./config.example.yaml).

@@ -57,7 +89,7 @@ For the full configuration surface, see [`config.example.yaml`](./config.example
 Most operators only need the env vars in the quickstart above. A few extras worth knowing:

 - `MINSTREL_BRANDING_APP_NAME` — rename the instance ("Family Jukebox", "Office Music"). Surfaces in the header, browser tab, and OG share previews.
- `MINSTREL_STORAGE_DATA_DIR` — defaults to `./data`. Holds playlist cover collages and other generated artefacts.
+- `MINSTREL_STORAGE_DATA_DIR` — where generated artefacts (playlist cover collages, artist art, caches) are written. The container image sets this to `/app/data`, which is why the quickstart mounts the `minstrel-data` volume there.
 - `MINSTREL_LIBRARY_SCAN_PATHS` — colon-separated list of music library roots to scan. Supports multiple roots (`/music:/podcasts`).

 ListenBrainz integration (per-user scrobble + similarity tokens) and Lidarr integration (URL + API key) are configured through the admin Settings UI rather than env vars or yaml — per Minstrel's "config in UI" rule, integration settings live where operators can edit them without restarting.
@@ -66,8 +98,13 @@ Most operational keys have a `MINSTREL_<SECTION>_<FIELD>` env override. Recommen

 ## Updating

- `:main` — rolling, follows the dev branch's tested tip. Recommended only for the operator who's running an upstream-watching deployment.
- `:v1.0.x` — pinned releases. Recommended default. Database migrations run automatically at startup; rollbacks require restoring a Postgres dump.
+Image tags (`git.fabledsword.com/bvandeusen/minstrel:<tag>`):
+
+- `:latest` — the newest blessed image. Moves on every `main` push **and** every release. Recommended for most operators.
+- `:vYYYY.MM.DD` — immutable per-day release tags. Pin one of these for a deployment you don't want moving under you. (Per-day CalVer — no trailing patch digit; a same-day re-cut moves the tag forward.)
+- `:main` — the rolling post-merge tip. Same image as `:latest` at push time; choose it if you want to track `main` explicitly rather than the release line.
+
+Every `:latest` and every `:vYYYY.MM.DD` bundles the current signed Android APK, so the in-app update channel is always live. Database migrations run automatically at startup; rollbacks require restoring a Postgres dump.

 ## Specs

@@ -10,6 +10,8 @@ import com.fabledsword.minstrel.cache.CacheIndexer
 import com.fabledsword.minstrel.cache.mutations.MutationReplayer
 import com.fabledsword.minstrel.cache.sync.SyncController
 import com.fabledsword.minstrel.di.ApplicationScope
+import com.fabledsword.minstrel.diagnostics.DiagnosticsReporter
+import com.fabledsword.minstrel.diagnostics.DiagnosticsUploader
 import com.fabledsword.minstrel.events.EventsStream
 import com.fabledsword.minstrel.events.LiveEventsDispatcher
 import com.fabledsword.minstrel.metadata.FreshnessSweeper
@@ -155,6 +157,11 @@ class MinstrelApplication :
     */
    @Suppress("unused") @Inject lateinit var liveEventsDispatcher: LiveEventsDispatcher

+    // Device diagnostics (M9). The reporter gates itself on the account's
+    // debug flag; the uploader drains its buffer on a tick / recovery.
+    @Suppress("unused") @Inject lateinit var diagnosticsReporter: DiagnosticsReporter
+    @Suppress("unused") @Inject lateinit var diagnosticsUploader: DiagnosticsUploader
+
    @Inject @ApplicationScope lateinit var appScope: CoroutineScope

    override fun onCreate() {
@@ -4,6 +4,8 @@ import androidx.lifecycle.ViewModel
 import androidx.lifecycle.viewModelScope
 import com.fabledsword.minstrel.admin.data.AdminInvitesRepository
 import com.fabledsword.minstrel.api.ErrorCopy
+import com.fabledsword.minstrel.connectivity.NetworkStatusController
+import com.fabledsword.minstrel.connectivity.recoveries
 import com.fabledsword.minstrel.models.Invite
 import dagger.hilt.android.lifecycle.HiltViewModel
 import kotlinx.coroutines.channels.Channel
@@ -25,6 +27,7 @@ data class AdminInvitesUiState(
@HiltViewModel
 class AdminInvitesViewModel @Inject constructor(
    private val repository: AdminInvitesRepository,
+    networkStatus: NetworkStatusController,
 ) : ViewModel() {

    private val internal = MutableStateFlow(AdminInvitesUiState())
@@ -36,6 +39,13 @@ class AdminInvitesViewModel @Inject constructor(

    init {
        refresh()
+        // Screen-level auto-recovery (issue #1245): reload a failed list
+        // when server health returns instead of waiting for a manual pull.
+        viewModelScope.launch {
+            networkStatus.recoveries().collect {
+                if (internal.value.message != null) refresh()
+            }
+        }
    }

    fun refresh() {
@@ -29,6 +29,7 @@ import androidx.navigation.NavHostController
 import com.fabledsword.minstrel.models.AdminQuarantineItemRef
 import com.fabledsword.minstrel.nav.AdminQuarantine
 import com.fabledsword.minstrel.shared.widgets.EmptyState
+import com.fabledsword.minstrel.shared.widgets.ErrorRetry
 import com.fabledsword.minstrel.shared.widgets.LoadingCentered
 import com.fabledsword.minstrel.shared.widgets.MinstrelTopAppBar
 import com.fabledsword.minstrel.shared.widgets.PullToRefreshScaffold
@@ -62,9 +63,10 @@ fun AdminQuarantineScreen(
                    body = "When users flag tracks as bad rips, wrong tags, or " +
                        "duplicates, their reports get aggregated and surfaced here.",
                )
-                is AdminQuarantineUiState.Error -> EmptyState(
+                is AdminQuarantineUiState.Error -> ErrorRetry(
                    title = "Couldn't load queue",
-                    body = s.message,
+                    message = s.message,
+                    onRetry = { viewModel.refresh() },
                )
                is AdminQuarantineUiState.Success -> QueueList(
                    rows = s.rows,
@@ -4,6 +4,8 @@ import androidx.lifecycle.ViewModel
 import androidx.lifecycle.viewModelScope
 import com.fabledsword.minstrel.admin.data.AdminQuarantineRepository
 import com.fabledsword.minstrel.api.ErrorCopy
+import com.fabledsword.minstrel.connectivity.NetworkStatusController
+import com.fabledsword.minstrel.connectivity.recoveries
 import com.fabledsword.minstrel.events.EventsStream
 import com.fabledsword.minstrel.models.AdminQuarantineItemRef
 import dagger.hilt.android.lifecycle.HiltViewModel
@@ -26,6 +28,7 @@ sealed interface AdminQuarantineUiState {
 class AdminQuarantineViewModel @Inject constructor(
    private val repository: AdminQuarantineRepository,
    private val eventsStream: EventsStream,
+    networkStatus: NetworkStatusController,
 ) : ViewModel() {

    private val internal = MutableStateFlow<AdminQuarantineUiState>(AdminQuarantineUiState.Loading)
@@ -38,6 +41,13 @@ class AdminQuarantineViewModel @Inject constructor(
                .filter { it.kind.startsWith("quarantine.") }
                .collect { refresh() }
        }
+        // Screen-level auto-recovery (issue #1245): reload a failed list
+        // when server health returns instead of waiting for a manual pull.
+        viewModelScope.launch {
+            networkStatus.recoveries().collect {
+                if (internal.value is AdminQuarantineUiState.Error) refresh()
+            }
+        }
    }

    fun refresh(): Job = viewModelScope.launch {
@@ -28,6 +28,7 @@ import androidx.navigation.NavHostController
 import com.fabledsword.minstrel.models.RequestRef
 import com.fabledsword.minstrel.nav.AdminRequests
 import com.fabledsword.minstrel.shared.widgets.EmptyState
+import com.fabledsword.minstrel.shared.widgets.ErrorRetry
 import com.fabledsword.minstrel.shared.widgets.LoadingCentered
 import com.fabledsword.minstrel.shared.widgets.MinstrelTopAppBar
 import com.fabledsword.minstrel.shared.widgets.PullToRefreshScaffold
@@ -61,9 +62,10 @@ fun AdminRequestsScreen(
                    body = "When users ask Lidarr for new music, their pending " +
                        "requests show up here for approval.",
                )
-                is AdminRequestsUiState.Error -> EmptyState(
+                is AdminRequestsUiState.Error -> ErrorRetry(
                    title = "Couldn't load requests",
-                    body = s.message,
+                    message = s.message,
+                    onRetry = { viewModel.refresh() },
                )
                is AdminRequestsUiState.Success -> RequestList(
                    rows = s.rows,
@@ -5,6 +5,8 @@ import androidx.lifecycle.viewModelScope
 import com.fabledsword.minstrel.admin.data.AdminRequestsRepository
 import com.fabledsword.minstrel.admin.data.AdminUsersRepository
 import com.fabledsword.minstrel.api.ErrorCopy
+import com.fabledsword.minstrel.connectivity.NetworkStatusController
+import com.fabledsword.minstrel.connectivity.recoveries
 import com.fabledsword.minstrel.events.EventsStream
 import com.fabledsword.minstrel.models.RequestRef
 import dagger.hilt.android.lifecycle.HiltViewModel
@@ -35,6 +37,7 @@ class AdminRequestsViewModel @Inject constructor(
    private val repository: AdminRequestsRepository,
    private val usersRepository: AdminUsersRepository,
    private val eventsStream: EventsStream,
+    networkStatus: NetworkStatusController,
 ) : ViewModel() {

    private val internal = MutableStateFlow<AdminRequestsUiState>(AdminRequestsUiState.Loading)
@@ -47,6 +50,13 @@ class AdminRequestsViewModel @Inject constructor(
                .filter { it.kind in RELEVANT_EVENT_KINDS }
                .collect { refresh() }
        }
+        // Screen-level auto-recovery (issue #1245): reload a failed list
+        // when server health returns instead of waiting for a manual pull.
+        viewModelScope.launch {
+            networkStatus.recoveries().collect {
+                if (internal.value is AdminRequestsUiState.Error) refresh()
+            }
+        }
    }

    fun refresh(): Job = viewModelScope.launch {
@@ -4,6 +4,8 @@ import androidx.lifecycle.ViewModel
 import androidx.lifecycle.viewModelScope
 import com.fabledsword.minstrel.admin.data.AdminUsersRepository
 import com.fabledsword.minstrel.api.ErrorCopy
+import com.fabledsword.minstrel.connectivity.NetworkStatusController
+import com.fabledsword.minstrel.connectivity.recoveries
 import com.fabledsword.minstrel.models.AdminUserRef
 import dagger.hilt.android.lifecycle.HiltViewModel
 import kotlinx.coroutines.Job
@@ -23,6 +25,7 @@ sealed interface AdminUsersUiState {
@HiltViewModel
 class AdminUsersViewModel @Inject constructor(
    private val repository: AdminUsersRepository,
+    networkStatus: NetworkStatusController,
 ) : ViewModel() {

    private val internal = MutableStateFlow<AdminUsersUiState>(AdminUsersUiState.Loading)
@@ -30,6 +33,13 @@ class AdminUsersViewModel @Inject constructor(

    init {
        refresh()
+        // Screen-level auto-recovery (issue #1245): reload a failed list
+        // when server health returns instead of waiting for a manual pull.
+        viewModelScope.launch {
+            networkStatus.recoveries().collect {
+                if (internal.value is AdminUsersUiState.Error) refresh()
+            }
+        }
    }

    fun refresh(): Job = viewModelScope.launch {
@@ -0,0 +1,36 @@
+package com.fabledsword.minstrel.api.endpoints
+
+import kotlinx.serialization.SerialName
+import kotlinx.serialization.Serializable
+import kotlinx.serialization.json.JsonElement
+import retrofit2.http.Body
+import retrofit2.http.POST
+
+/**
+ * Retrofit interface for device diagnostics ingest (M9). One call
+ * uploads a batch of buffered events. The server stores them only when
+ * the account's debug_mode_enabled flag is on (it returns 204 otherwise,
+ * which the uploader treats as success so it can drop the batch).
+ */
+interface DiagnosticsApi {
+    @POST("api/diagnostics")
+    suspend fun report(@Body body: DiagnosticsReportRequest)
+}
+
+@Serializable
+data class DiagnosticsReportRequest(
+    @SerialName("client_id") val clientId: String,
+    @SerialName("app_version") val appVersion: String? = null,
+    @SerialName("os_version") val osVersion: String? = null,
+    val events: List<DiagnosticEventWire>,
+)
+
+@Serializable
+data class DiagnosticEventWire(
+    val kind: String,
+    // Device-clock epoch milliseconds. The server stamps its own
+    // received_at; both are stored so a skewed device clock is visible.
+    @SerialName("occurred_at") val occurredAt: Long,
+    // Opaque structured payload carrying the event sub-type + fields.
+    val payload: JsonElement,
+)
@@ -1,6 +1,7 @@
 package com.fabledsword.minstrel.auth

 import com.fabledsword.minstrel.api.endpoints.AuthApi
+import com.fabledsword.minstrel.api.endpoints.MeApi
 import com.fabledsword.minstrel.di.ApplicationScope
 import com.fabledsword.minstrel.models.UserRef
 import com.fabledsword.minstrel.models.wire.LoginRequestBody
@@ -35,6 +36,7 @@ class AuthController @Inject constructor(
    retrofit: Retrofit,
 ) {
    private val api: AuthApi = retrofit.create()
+    private val meApi: MeApi = retrofit.create()

    private val currentUserState = MutableStateFlow<UserRef?>(null)
    val currentUser: StateFlow<UserRef?> = currentUserState.asStateFlow()
@@ -55,6 +57,10 @@ class AuthController @Inject constructor(
                currentUserState.value = raw?.let { decodeUser(it) }
            }
        }
+        // Refresh from /api/me on startup so a remotely-changed account
+        // flag (e.g. admin enabling debug mode, M9) reaches the device
+        // without a re-login. Best-effort; failures keep the cached value.
+        scope.launch { refreshProfile() }
    }

    /**
@@ -72,9 +78,32 @@ class AuthController @Inject constructor(
        )
        currentUserState.value = user
        authStore.setUserJson(json.encodeToString(UserRef.serializer(), user))
+        // Pull the fuller /me shape (carries debug_mode_enabled) right
+        // after login so the diagnostics gate is correct without waiting
+        // for the next startup refresh.
+        scope.launch { refreshProfile() }
        return user
    }

+    /**
+     * Re-fetch the caller's profile from /api/me and update currentUser
+     * + persisted userJson. Carries account-level flags (debug mode)
+     * that aren't in the login response. Best-effort: a network failure
+     * leaves the cached identity untouched. No-op when signed out.
+     */
+    suspend fun refreshProfile() {
+        if (!isSignedIn) return
+        val p = runCatching { meApi.getProfile() }.getOrNull() ?: return
+        val user = UserRef(
+            id = p.id,
+            username = p.username,
+            isAdmin = p.isAdmin,
+            debugModeEnabled = p.debugModeEnabled,
+        )
+        currentUserState.value = user
+        authStore.setUserJson(json.encodeToString(UserRef.serializer(), user))
+    }
+
    /**
     * Clears the local session immediately and best-effort hits
     * `/api/auth/logout` so the server can drop its session row.
@@ -59,6 +59,9 @@ class AuthStore @Inject constructor(
    private val cacheSettingsState = MutableStateFlow(CacheSettings.DEFAULT)
    val cacheSettings: StateFlow<CacheSettings> = cacheSettingsState.asStateFlow()

+    private val diagnosticsOptOutState = MutableStateFlow(false)
+    val diagnosticsOptOut: StateFlow<Boolean> = diagnosticsOptOutState.asStateFlow()
+
    private val json = Json { ignoreUnknownKeys = true }

    init {
@@ -70,6 +73,7 @@ class AuthStore @Inject constructor(
                themeModeState.value = row?.themeMode
                clientIdState.value = row?.clientId
                cacheSettingsState.value = decodeCacheSettings(row?.cacheSettingsJson)
+                diagnosticsOptOutState.value = row?.diagnosticsOptOut ?: false
            }
        }
    }
@@ -112,6 +116,11 @@ class AuthStore @Inject constructor(
        scope.launch { persistCacheSettings(encoded) }
    }

+    fun setDiagnosticsOptOut(value: Boolean) {
+        diagnosticsOptOutState.value = value
+        scope.launch { persistDiagnosticsOptOut(value) }
+    }
+
    private suspend fun persistCookie(value: String?) {
        if (dao.get() == null) {
            dao.upsert(currentEntity().copy(sessionCookie = value))
@@ -160,6 +169,14 @@ class AuthStore @Inject constructor(
        }
    }

+    private suspend fun persistDiagnosticsOptOut(value: Boolean) {
+        if (dao.get() == null) {
+            dao.upsert(currentEntity().copy(diagnosticsOptOut = value))
+        } else {
+            dao.setDiagnosticsOptOut(value)
+        }
+    }
+
    private fun currentEntity(): AuthSessionEntity = AuthSessionEntity(
        id = ROW_ID,
        sessionCookie = sessionCookieState.value,
@@ -171,6 +188,7 @@ class AuthStore @Inject constructor(
            CacheSettings.serializer(),
            cacheSettingsState.value,
        ),
+        diagnosticsOptOut = diagnosticsOptOutState.value,
    )

    companion object {
@@ -16,6 +16,7 @@ import com.fabledsword.minstrel.cache.db.dao.CachedResumeStateDao
 import com.fabledsword.minstrel.cache.db.dao.CachedPlaylistTrackDao
 import com.fabledsword.minstrel.cache.db.dao.CachedQuarantineDao
 import com.fabledsword.minstrel.cache.db.dao.CachedTrackDao
+import com.fabledsword.minstrel.cache.db.dao.DiagnosticEventDao
 import com.fabledsword.minstrel.cache.db.dao.SyncMetadataDao
 import com.fabledsword.minstrel.cache.db.entities.AudioCacheIndexEntity
 import com.fabledsword.minstrel.cache.db.entities.AuthSessionEntity
@@ -30,6 +31,7 @@ import com.fabledsword.minstrel.cache.db.entities.CachedResumeStateEntity
 import com.fabledsword.minstrel.cache.db.entities.CachedPlaylistTrackEntity
 import com.fabledsword.minstrel.cache.db.entities.CachedQuarantineEntity
 import com.fabledsword.minstrel.cache.db.entities.CachedTrackEntity
+import com.fabledsword.minstrel.cache.db.entities.DiagnosticEventEntity
 import com.fabledsword.minstrel.cache.db.entities.SyncMetadataEntity

 /**
@@ -61,8 +63,11 @@ import com.fabledsword.minstrel.cache.db.entities.SyncMetadataEntity
        CachedHomeIndexEntity::class,
        CachedHistorySnapshotEntity::class,
        AuthSessionEntity::class,
+        DiagnosticEventEntity::class,
    ],
-    version = 6,
+    // v7: + diagnostic_events table (M9) and the diagnosticsOptOut column
+    // on auth_session. Pre-v1 destructive fallback rebuilds on mismatch.
+    version = 7,
    exportSchema = true,
 )
@TypeConverters(MinstrelTypeConverters::class)
@@ -81,4 +86,5 @@ abstract class AppDatabase : RoomDatabase() {
    abstract fun cachedHomeIndexDao(): CachedHomeIndexDao
    abstract fun cachedHistorySnapshotDao(): CachedHistorySnapshotDao
    abstract fun authSessionDao(): AuthSessionDao
+    abstract fun diagnosticEventDao(): DiagnosticEventDao
 }
@@ -10,6 +10,7 @@ import com.fabledsword.minstrel.cache.db.dao.CachedHistorySnapshotDao
 import com.fabledsword.minstrel.cache.db.dao.CachedHomeIndexDao
 import com.fabledsword.minstrel.cache.db.dao.CachedLikeDao
 import com.fabledsword.minstrel.cache.db.dao.CachedMutationDao
+import com.fabledsword.minstrel.cache.db.dao.DiagnosticEventDao
 import com.fabledsword.minstrel.cache.db.dao.CachedPlaylistDao
 import com.fabledsword.minstrel.cache.db.dao.CachedPlaylistTrackDao
 import com.fabledsword.minstrel.cache.db.dao.CachedQuarantineDao
@@ -105,5 +106,10 @@ object DatabaseModule {
    fun provideAudioCacheIndexDao(db: AppDatabase): AudioCacheIndexDao =
        db.audioCacheIndexDao()

+    @Provides
+    @Singleton
+    fun provideDiagnosticEventDao(db: AppDatabase): DiagnosticEventDao =
+        db.diagnosticEventDao()
+
    private const val DATABASE_NAME = "minstrel.db"
 }
@@ -42,4 +42,8 @@ interface AuthSessionDao {
    /** Partial update: change only the serialized cache settings. */
    @Query("UPDATE auth_session SET cacheSettingsJson = :json WHERE id = 0")
    suspend fun setCacheSettingsJson(json: String?)
+
+    /** Partial update: change only the per-device diagnostics opt-out. */
+    @Query("UPDATE auth_session SET diagnosticsOptOut = :optOut WHERE id = 0")
+    suspend fun setDiagnosticsOptOut(optOut: Boolean)
 }
@@ -0,0 +1,35 @@
+package com.fabledsword.minstrel.cache.db.dao
+
+import androidx.room.Dao
+import androidx.room.Insert
+import androidx.room.Query
+import com.fabledsword.minstrel.cache.db.entities.DiagnosticEventEntity
+
+@Dao
+interface DiagnosticEventDao {
+    @Insert
+    suspend fun insert(row: DiagnosticEventEntity): Long
+
+    /** FIFO drain order so the uploader sends oldest-first. */
+    @Query("SELECT * FROM diagnostic_events ORDER BY id ASC LIMIT :limit")
+    suspend fun takeBatch(limit: Int): List<DiagnosticEventEntity>
+
+    @Query("SELECT COUNT(*) FROM diagnostic_events")
+    suspend fun count(): Int
+
+    @Query("DELETE FROM diagnostic_events WHERE id IN (:ids)")
+    suspend fun deleteByIds(ids: List<Long>)
+
+    /**
+     * Ring-buffer trim: drop the oldest rows beyond [keep]. Called after
+     * insert so a long offline stretch can't grow the buffer unbounded.
+     */
+    @Query(
+        "DELETE FROM diagnostic_events WHERE id NOT IN " +
+            "(SELECT id FROM diagnostic_events ORDER BY id DESC LIMIT :keep)",
+    )
+    suspend fun trimToNewest(keep: Int)
+
+    @Query("DELETE FROM diagnostic_events")
+    suspend fun clear()
+}
@@ -36,4 +36,11 @@ data class AuthSessionEntity(
     * CacheSettings shape evolves.
     */
    val cacheSettingsJson: String? = null,
+    /**
+     * Per-device opt-out of diagnostics reporting (M9). When the
+     * account's debug mode is enabled by an admin, the user can still
+     * turn reporting OFF on this device (battery/privacy) — that local
+     * choice lives here. Default false = honor the account flag.
+     */
+    val diagnosticsOptOut: Boolean = false,
 )
@@ -0,0 +1,28 @@
+package com.fabledsword.minstrel.cache.db.entities
+
+import androidx.room.Entity
+import androidx.room.PrimaryKey
+
+/**
+ * One buffered device-diagnostics event (M9). The DiagnosticsReporter
+ * writes rows here when the account's debug mode is on; the
+ * DiagnosticsUploader drains them to POST /api/diagnostics and deletes
+ * on success.
+ *
+ * This is a deliberate ring buffer that is NOT routed through the offline
+ * MutationQueue: diagnostics are high-volume, best-effort telemetry, and
+ * the bug we're chasing (roaming / dead-zone recovery) happens WHILE
+ * offline — so events must persist locally through the dead zone and
+ * upload on recovery, without clogging the user-data mutation replay.
+ *
+ * `occurredAtMillis` is the device-clock epoch-ms when the event happened
+ * (the server also stamps its own received_at). `payloadJson` is an
+ * opaque JSON object carrying the event sub-type + fields.
+ */
+@Entity(tableName = "diagnostic_events")
+data class DiagnosticEventEntity(
+    @PrimaryKey(autoGenerate = true) val id: Long = 0,
+    val kind: String,
+    val occurredAtMillis: Long,
+    val payloadJson: String,
+)
@@ -1,5 +1,6 @@
 package com.fabledsword.minstrel.cache.sync

+import com.fabledsword.minstrel.api.ErrorCopy
 import com.fabledsword.minstrel.api.endpoints.SyncApi
 import com.fabledsword.minstrel.auth.AuthStore
 import com.fabledsword.minstrel.connectivity.NetworkStatusController
@@ -17,6 +18,9 @@ import com.fabledsword.minstrel.models.wire.SyncAlbumWire
 import com.fabledsword.minstrel.models.wire.SyncArtistWire
 import com.fabledsword.minstrel.models.wire.SyncTrackWire
 import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.StateFlow
+import kotlinx.coroutines.flow.asStateFlow
 import kotlinx.coroutines.flow.distinctUntilChanged
 import kotlinx.coroutines.flow.filter
 import kotlinx.coroutines.flow.filterNotNull
@@ -64,6 +68,17 @@ class SyncController @Inject constructor(
    // pull-to-refresh) can fire concurrently; coalesce them into one pass.
    private val mutex = Mutex()

+    private val lastSyncErrorInternal = MutableStateFlow<String?>(null)
+
+    /**
+     * Human copy for the most recent sync failure; null after any clean
+     * pass. Lets the Library screen distinguish "empty because the first
+     * sync failed" (show error + retry) from "genuinely empty library"
+     * (show welcome copy) — a failed sync over a populated cache stays
+     * silent, since the cached content is still the better surface.
+     */
+    val lastSyncError: StateFlow<String?> = lastSyncErrorInternal.asStateFlow()
+
    init {
        scope.launch {
            authStore.sessionCookie
@@ -82,11 +97,13 @@ class SyncController @Inject constructor(
        }
    }

-    /** Public entry-point for "Sync now" affordances. Swallows errors. */
+    /** Public entry-point for "Sync now" affordances. Swallows errors into [lastSyncError]. */
    suspend fun syncSafe() {
        if (!mutex.tryLock()) return
        try {
            runCatching { sync() }
+                .onSuccess { lastSyncErrorInternal.value = null }
+                .onFailure { lastSyncErrorInternal.value = ErrorCopy.fromThrowable(it) }
        } finally {
            mutex.unlock()
        }
@@ -0,0 +1,27 @@
+package com.fabledsword.minstrel.connectivity
+
+import kotlinx.coroutines.flow.Flow
+import kotlinx.coroutines.flow.distinctUntilChanged
+import kotlinx.coroutines.flow.drop
+import kotlinx.coroutines.flow.filter
+import kotlinx.coroutines.flow.map
+
+/**
+ * Emits once each time server health RETURNS to [ServerHealth.Healthy]
+ * after the collector subscribed — the StateFlow's replayed current value
+ * is dropped, so only genuine down→up transitions fire (a screen that
+ * subscribes while already Healthy doesn't double-load).
+ *
+ * This is the screen-level half of the recovery idiom the app-lifetime
+ * singletons (SyncController / MutationReplayer / DiagnosticsUploader)
+ * already use: a ViewModel collects this in its viewModelScope and re-runs
+ * its load, so a surface that failed while the server was unreachable
+ * heals itself the moment connectivity returns instead of sitting in the
+ * failed state until a manual pull-to-refresh.
+ */
+fun NetworkStatusController.recoveries(): Flow<Unit> = state
+    .map { it == ServerHealth.Healthy }
+    .distinctUntilChanged()
+    .drop(1)
+    .filter { it }
+    .map { }
@@ -0,0 +1,328 @@
+package com.fabledsword.minstrel.diagnostics
+
+import android.content.BroadcastReceiver
+import android.content.Context
+import android.content.Intent
+import android.content.IntentFilter
+import android.os.PowerManager
+import androidx.lifecycle.DefaultLifecycleObserver
+import androidx.lifecycle.LifecycleOwner
+import androidx.core.content.ContextCompat
+import androidx.lifecycle.ProcessLifecycleOwner
+import com.fabledsword.minstrel.auth.AuthController
+import com.fabledsword.minstrel.auth.AuthStore
+import com.fabledsword.minstrel.cache.db.dao.DiagnosticEventDao
+import com.fabledsword.minstrel.cache.db.entities.DiagnosticEventEntity
+import com.fabledsword.minstrel.connectivity.ConnectivityObserver
+import com.fabledsword.minstrel.connectivity.NetworkStatusController
+import com.fabledsword.minstrel.di.ApplicationScope
+import com.fabledsword.minstrel.player.PlayerController
+import com.fabledsword.minstrel.player.RemotePlayerState
+import com.fabledsword.minstrel.player.output.OutputPickerController
+import com.fabledsword.minstrel.player.output.OutputRoute
+import dagger.hilt.android.qualifiers.ApplicationContext
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.Job
+import kotlinx.coroutines.delay
+import kotlinx.coroutines.flow.combine
+import kotlinx.coroutines.flow.distinctUntilChanged
+import kotlinx.coroutines.flow.map
+import kotlinx.coroutines.launch
+import kotlinx.serialization.json.Json
+import kotlinx.serialization.json.JsonObject
+import kotlinx.serialization.json.buildJsonObject
+import kotlinx.serialization.json.put
+import javax.inject.Inject
+import javax.inject.Singleton
+
+/**
+ * On-device diagnostics collector (M9). Active only while the account's
+ * debug mode is enabled (server flag, read via AuthController.currentUser)
+ * AND the user hasn't opted out locally. When active it taps existing
+ * connectivity / player / UPnP / power seams READ-ONLY and writes a
+ * timeseries of events into the [DiagnosticEventDao] ring buffer; the
+ * [DiagnosticsUploader] drains that buffer to the server.
+ *
+ * The aim is to explain two failure classes after the fact: roaming /
+ * poor-data recovery (connectivity + server-health transitions) and
+ * locked-phone UPnP desync (power/Doze transitions correlated with the
+ * Sonos-vs-local position deltas captured in the heartbeat).
+ */
+@Suppress("TooManyFunctions") // one collector + one (un)register pair per signal; cohesive
+@Singleton
+class DiagnosticsReporter @Inject constructor(
+    @ApplicationContext private val context: Context,
+    @ApplicationScope private val scope: CoroutineScope,
+    private val dao: DiagnosticEventDao,
+    private val authController: AuthController,
+    private val authStore: AuthStore,
+    private val connectivity: ConnectivityObserver,
+    private val networkStatus: NetworkStatusController,
+    private val playerController: PlayerController,
+    private val outputPicker: OutputPickerController,
+    private val remoteState: RemotePlayerState,
+    private val json: Json,
+) {
+    @Volatile private var enabled = false
+    private var collectorJob: Job? = null
+    private var powerReceiver: BroadcastReceiver? = null
+    private var lifecycleObserver: DefaultLifecycleObserver? = null
+
+    init {
+        // Gate = account flag (currentUser.debugModeEnabled) AND not the
+        // per-device local opt-out.
+        scope.launch {
+            combine(authController.currentUser, authStore.diagnosticsOptOut) { user, optOut ->
+                (user?.debugModeEnabled == true) && !optOut
+            }.distinctUntilChanged().collect { setEnabled(it) }
+        }
+        // Periodically re-pull /me so a remote admin flip propagates
+        // without a re-login or app restart.
+        scope.launch {
+            while (true) {
+                delay(GATE_REFRESH_MS)
+                authController.refreshProfile()
+            }
+        }
+    }
+
+    private fun setEnabled(value: Boolean) {
+        if (value == enabled) return
+        enabled = value
+        if (value) start() else stop()
+    }
+
+    private fun start() {
+        registerPowerReceiver()
+        registerLifecycleObserver()
+        collectorJob = scope.launch {
+            record("lifecycle", buildJsonObject { put("event", "reporting_started") })
+            launch { collectConnectivity() }
+            launch { collectServerHealth() }
+            launch { collectUpnpDrops() }
+            launch { collectPlayerState() }
+            launch { collectTrackChanges() }
+            launch { collectRoutes() }
+            launch { heartbeatLoop() }
+        }
+    }
+
+    private fun stop() {
+        collectorJob?.cancel()
+        collectorJob = null
+        unregisterPowerReceiver()
+        unregisterLifecycleObserver()
+        // Off means off: drop any unsent buffer (honors the user OFF
+        // intent and avoids leaking data captured before disable).
+        scope.launch { runCatching { dao.clear() } }
+    }
+
+    private suspend fun collectConnectivity() {
+        connectivity.online.distinctUntilChanged().collect { online ->
+            record("connectivity", buildJsonObject {
+                put("event", "online_changed")
+                put("online", online)
+            })
+        }
+    }
+
+    private suspend fun collectServerHealth() {
+        // state is a StateFlow — already conflated/distinct, so no
+        // distinctUntilChanged (it's a deprecation warning = build error).
+        networkStatus.state.collect { s ->
+            record("connectivity", buildJsonObject {
+                put("event", "server_health")
+                put("state", s.name)
+            })
+        }
+    }
+
+    private suspend fun collectUpnpDrops() {
+        playerController.dropEvents.collect { msg ->
+            record("upnp_sync", buildJsonObject {
+                put("event", "drop")
+                put("message", msg)
+            })
+        }
+    }
+
+    private suspend fun collectPlayerState() {
+        // 'playback', not 'upnp_sync' — player state applies to every output
+        // route (phone speaker, Bluetooth, UPnP), not just casting.
+        playerController.uiState
+            .map { Triple(it.currentSource, it.isUpnpLoading, it.playbackError) }
+            .distinctUntilChanged()
+            .collect { (source, upnpLoading, err) ->
+                record("playback", buildJsonObject {
+                    put("event", "player_state")
+                    put("source", source ?: "")
+                    put("upnp_loading", upnpLoading)
+                    if (err != null) put("error", err)
+                })
+            }
+    }
+
+    // Emit a snapshot at each track/queue-index change — captures a
+    // skip-induced local↔Sonos desync at the INSTANT it happens, which the
+    // 45s heartbeat misses. Note: uiState is a conflated StateFlow, so a
+    // very rapid skip burst may coalesce intermediate indices (we still get
+    // the boundaries + the local-vs-Sonos snapshot).
+    private suspend fun collectTrackChanges() {
+        playerController.uiState
+            .map { it.queueIndex to it.currentTrack?.id }
+            .distinctUntilChanged()
+            .collect { (index, _) ->
+                val ui = playerController.uiState.value
+                val casting = outputPicker.routesState.value.current.protocol !=
+                    OutputRoute.Protocol.SYSTEM
+                record("playback", buildJsonObject {
+                    put("event", "track_change")
+                    put("local_index", index)
+                    // Track IDENTITY, not just index — indices wobble across
+                    // re-casts, so the id + Sonos URI make a desync unambiguous.
+                    put("local_track_id", ui.currentTrack?.id ?: "")
+                    put("local_pos_ms", ui.positionMs)
+                    putSonos(this, casting)
+                    put("upnp_loading", ui.isUpnpLoading)
+                    put("server_health", networkStatus.state.value.name)
+                    put("route", outputPicker.routesState.value.current.name)
+                })
+            }
+    }
+
+    private suspend fun collectRoutes() {
+        // 'playback' — route changes happen for all outputs. This only ever
+        // logs the ACTIVE route (routesState.current), so no "connected" flag.
+        outputPicker.routesState.map { it.current }.distinctUntilChanged().collect { r ->
+            record("playback", buildJsonObject {
+                put("event", "route")
+                put("id", r.id)
+                put("name", r.name)
+                put("kind", r.kind.name)
+                put("protocol", r.protocol.name)
+            })
+        }
+    }
+
+    private suspend fun heartbeatLoop() {
+        while (true) {
+            delay(HEARTBEAT_MS)
+            val ui = playerController.uiState.value
+            val route = outputPicker.routesState.value.current
+            val routeActive = route.protocol != OutputRoute.Protocol.SYSTEM
+            // Idle = nothing worth sampling. Skip to keep the buffer lean.
+            if (!ui.isPlaying && !routeActive) continue
+            record("heartbeat", buildJsonObject {
+                put("server_health", networkStatus.state.value.name)
+                put("is_playing", ui.isPlaying)
+                put("source", ui.currentSource ?: "")
+                put("local_index", ui.queueIndex)
+                put("local_track_id", ui.currentTrack?.id ?: "")
+                put("local_pos_ms", ui.positionMs)
+                put("route", route.name)
+                put("route_protocol", route.protocol.name)
+                putSonos(this, routeActive)
+                addPowerFields(this)
+            })
+        }
+    }
+
+    // --- power + lifecycle taps -------------------------------------------
+
+    private fun registerPowerReceiver() {
+        if (powerReceiver != null) return
+        val receiver = object : BroadcastReceiver() {
+            override fun onReceive(c: Context?, intent: Intent?) {
+                val action = intent?.action ?: return
+                if (!enabled) return
+                scope.launch { record("power", powerEvent(action)) }
+            }
+        }
+        val filter = IntentFilter().apply {
+            addAction(Intent.ACTION_SCREEN_ON)
+            addAction(Intent.ACTION_SCREEN_OFF)
+            addAction(PowerManager.ACTION_DEVICE_IDLE_MODE_CHANGED)
+        }
+        // System-protected broadcasts, but pass NOT_EXPORTED explicitly so
+        // the API 34+ registerReceiver flag requirement is satisfied.
+        ContextCompat.registerReceiver(
+            context, receiver, filter, ContextCompat.RECEIVER_NOT_EXPORTED,
+        )
+        powerReceiver = receiver
+    }
+
+    private fun unregisterPowerReceiver() {
+        powerReceiver?.let { runCatching { context.unregisterReceiver(it) } }
+        powerReceiver = null
+    }
+
+    private fun registerLifecycleObserver() {
+        if (lifecycleObserver != null) return
+        val obs = object : DefaultLifecycleObserver {
+            override fun onStart(owner: LifecycleOwner) = logLifecycle("app_foreground")
+            override fun onStop(owner: LifecycleOwner) = logLifecycle("app_background")
+        }
+        lifecycleObserver = obs
+        scope.launch(Dispatchers.Main) {
+            ProcessLifecycleOwner.get().lifecycle.addObserver(obs)
+        }
+    }
+
+    private fun unregisterLifecycleObserver() {
+        val obs = lifecycleObserver ?: return
+        lifecycleObserver = null
+        scope.launch(Dispatchers.Main) {
+            ProcessLifecycleOwner.get().lifecycle.removeObserver(obs)
+        }
+    }
+
+    private fun logLifecycle(event: String) {
+        if (!enabled) return
+        scope.launch { record("lifecycle", buildJsonObject { put("event", event) }) }
+    }
+
+    private fun powerEvent(action: String): JsonObject = buildJsonObject {
+        put("event", action.substringAfterLast('.'))
+        addPowerFields(this)
+    }
+
+    // Sonos/UPnP remote-vs-local desync fields. Only meaningful while a
+    // remote route is active; zeroed otherwise so a stale RemotePlayerState
+    // from a just-ended cast can't masquerade as live Sonos data (the
+    // cast→phone handoff artifact). currentTrackUri is the desync ground
+    // truth — it carries the track the speaker is actually streaming.
+    private fun putSonos(builder: kotlinx.serialization.json.JsonObjectBuilder, casting: Boolean) {
+        builder.put("sonos_track", if (casting) remoteState.trackNumber else 0)
+        builder.put("sonos_pos_ms", if (casting) remoteState.positionMs else 0)
+        builder.put("sonos_playing", casting && remoteState.isPlaying)
+        if (casting) builder.put("sonos_uri", remoteState.currentTrackUri)
+    }
+
+    private fun addPowerFields(builder: kotlinx.serialization.json.JsonObjectBuilder) {
+        val pm = context.getSystemService(Context.POWER_SERVICE) as PowerManager
+        builder.put("doze", pm.isDeviceIdleMode)
+        builder.put("screen_on", pm.isInteractive)
+        builder.put("battery_opt_ignored", pm.isIgnoringBatteryOptimizations(context.packageName))
+    }
+
+    private suspend fun record(kind: String, payload: JsonObject) {
+        runCatching {
+            val id = dao.insert(
+                DiagnosticEventEntity(
+                    kind = kind,
+                    occurredAtMillis = System.currentTimeMillis(),
+                    payloadJson = json.encodeToString(JsonObject.serializer(), payload),
+                ),
+            )
+            if (id % TRIM_INTERVAL == 0L) dao.trimToNewest(MAX_BUFFER)
+        }
+    }
+
+    private companion object {
+        const val HEARTBEAT_MS = 45_000L
+        const val GATE_REFRESH_MS = 300_000L // re-pull /me every 5 min
+        const val MAX_BUFFER = 5_000 // ring-buffer ceiling, oldest dropped
+        const val TRIM_INTERVAL = 50L // trim every N inserts, not every one
+    }
+}
@@ -0,0 +1,118 @@
+package com.fabledsword.minstrel.diagnostics
+
+import android.os.Build
+import com.fabledsword.minstrel.BuildConfig
+import com.fabledsword.minstrel.api.endpoints.DiagnosticEventWire
+import com.fabledsword.minstrel.api.endpoints.DiagnosticsApi
+import com.fabledsword.minstrel.api.endpoints.DiagnosticsReportRequest
+import com.fabledsword.minstrel.auth.AuthStore
+import com.fabledsword.minstrel.cache.db.dao.DiagnosticEventDao
+import com.fabledsword.minstrel.cache.db.entities.DiagnosticEventEntity
+import com.fabledsword.minstrel.connectivity.NetworkStatusController
+import com.fabledsword.minstrel.connectivity.ServerHealth
+import com.fabledsword.minstrel.di.ApplicationScope
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.delay
+import kotlinx.coroutines.flow.distinctUntilChanged
+import kotlinx.coroutines.flow.filter
+import kotlinx.coroutines.flow.filterNotNull
+import kotlinx.coroutines.flow.map
+import kotlinx.coroutines.launch
+import kotlinx.coroutines.sync.Mutex
+import kotlinx.serialization.json.Json
+import retrofit2.Retrofit
+import retrofit2.create
+import javax.inject.Inject
+import javax.inject.Singleton
+
+/**
+ * Drains the [DiagnosticEventDao] ring buffer to POST /api/diagnostics
+ * (M9). Triggers mirror [com.fabledsword.minstrel.cache.mutations.MutationReplayer]:
+ * a periodic tick, a sign-in (sessionCookie non-null), and a server-health
+ * recovery to [ServerHealth.Healthy] — so a dead-zone's buffered events
+ * upload the moment the link comes back.
+ *
+ * Deliberately NOT the MutationQueue: diagnostics are high-volume,
+ * best-effort telemetry. A failed upload just retries on the next tick;
+ * the server no-ops (204) when the account's debug flag is off, which the
+ * uploader treats as success so the buffer drains either way.
+ */
+@Singleton
+class DiagnosticsUploader @Inject constructor(
+    private val dao: DiagnosticEventDao,
+    private val authStore: AuthStore,
+    private val json: Json,
+    @ApplicationScope private val scope: CoroutineScope,
+    networkStatus: NetworkStatusController,
+    retrofit: Retrofit,
+) {
+    private val api: DiagnosticsApi = retrofit.create()
+    private val mutex = Mutex()
+
+    init {
+        scope.launch {
+            while (true) {
+                delay(UPLOAD_INTERVAL_MS)
+                drainSafe()
+            }
+        }
+        scope.launch {
+            authStore.sessionCookie.filterNotNull().distinctUntilChanged().collect { drainSafe() }
+        }
+        scope.launch {
+            networkStatus.state
+                .map { it == ServerHealth.Healthy }
+                .distinctUntilChanged()
+                .filter { it }
+                .collect { drainSafe() }
+        }
+    }
+
+    /** Coalesces concurrent triggers via tryLock — a drain in flight wins. */
+    private suspend fun drainSafe() {
+        val clientId = authStore.clientId.value
+        // Signed out / no client id yet → nothing to do. Single guard keeps
+        // the return count within the detekt gate.
+        if (authStore.sessionCookie.value.isNullOrEmpty() || clientId == null) return
+        if (!mutex.tryLock()) return
+        try {
+            drain(clientId)
+        } finally {
+            mutex.unlock()
+        }
+    }
+
+    private suspend fun drain(clientId: String) {
+        var more = true
+        while (more) {
+            val batch = runCatching { dao.takeBatch(BATCH_SIZE) }.getOrNull().orEmpty()
+            val sent = batch.isNotEmpty() && runCatching { upload(clientId, batch) }.isSuccess
+            if (sent) runCatching { dao.deleteByIds(batch.map { it.id }) }
+            // Keep going only while a full batch sent cleanly; otherwise stop
+            // (empty buffer, or a failure to retry on the next trigger).
+            more = sent && batch.size >= BATCH_SIZE
+        }
+    }
+
+    private suspend fun upload(clientId: String, batch: List<DiagnosticEventEntity>) {
+        api.report(
+            DiagnosticsReportRequest(
+                clientId = clientId,
+                appVersion = BuildConfig.VERSION_NAME,
+                osVersion = "Android ${Build.VERSION.RELEASE} (${Build.MODEL})",
+                events = batch.map { row ->
+                    DiagnosticEventWire(
+                        kind = row.kind,
+                        occurredAt = row.occurredAtMillis,
+                        payload = json.parseToJsonElement(row.payloadJson),
+                    )
+                },
+            ),
+        )
+    }
+
+    private companion object {
+        const val UPLOAD_INTERVAL_MS = 60_000L
+        const val BATCH_SIZE = 100
+    }
+}
@@ -41,6 +41,7 @@ import com.fabledsword.minstrel.models.ArtistSuggestionRef
 import com.fabledsword.minstrel.models.LidarrRequestKind
 import com.fabledsword.minstrel.models.LidarrSearchResultRef
 import com.fabledsword.minstrel.nav.Discover
+import com.fabledsword.minstrel.shared.widgets.ErrorRetry
 import com.fabledsword.minstrel.shared.widgets.LoadingCentered
 import com.fabledsword.minstrel.shared.widgets.MinstrelTopAppBar
 import com.fabledsword.minstrel.shared.widgets.PullToRefreshScaffold
@@ -109,6 +110,7 @@ private fun DiscoverBody(
                            snackbar.showSnackbar(snackbarFor(outcome, s.name))
                        }
                    },
+                    onRetry = { viewModel.loadSuggestions() },
                )
                ResultsState.Loading -> LoadingCentered()
                is ResultsState.Loaded -> ResultsList(
@@ -121,7 +123,11 @@ private fun DiscoverBody(
                        }
                    },
                )
-                is ResultsState.Error -> CenteredMessage("Search failed: ${r.message}")
+                is ResultsState.Error -> ErrorRetry(
+                    title = "Search failed",
+                    message = r.message,
+                    onRetry = viewModel::runSearch,
+                )
            }
        }
    }
@@ -177,10 +183,15 @@ private fun SuggestionsPane(
    state: SuggestionState,
    locallyRequestedMbids: Set<String>,
    onRequest: (ArtistSuggestionRef) -> Unit,
+    onRetry: () -> Unit,
 ) {
    when (state) {
        SuggestionState.Loading -> LoadingCentered()
-        is SuggestionState.Error -> CenteredMessage("Couldn't load suggestions.")
+        is SuggestionState.Error -> ErrorRetry(
+            title = "Couldn't load suggestions",
+            message = state.message,
+            onRetry = onRetry,
+        )
        is SuggestionState.Loaded -> SuggestionsList(
            items = state.items.filter { it.mbid !in locallyRequestedMbids },
            onRequest = onRequest,
@@ -3,6 +3,8 @@ package com.fabledsword.minstrel.discover.ui
 import androidx.lifecycle.ViewModel
 import androidx.lifecycle.viewModelScope
 import com.fabledsword.minstrel.api.ErrorCopy
+import com.fabledsword.minstrel.connectivity.NetworkStatusController
+import com.fabledsword.minstrel.connectivity.recoveries
 import com.fabledsword.minstrel.discover.data.DiscoverRepository
 import com.fabledsword.minstrel.discover.data.RequestOutcome
 import com.fabledsword.minstrel.models.ArtistSuggestionRef
@@ -46,6 +48,7 @@ sealed interface ResultsState {
@HiltViewModel
 class DiscoverViewModel @Inject constructor(
    private val repository: DiscoverRepository,
+    networkStatus: NetworkStatusController,
 ) : ViewModel() {

    private val internal = MutableStateFlow(DiscoverState())
@@ -53,6 +56,15 @@ class DiscoverViewModel @Inject constructor(

    init {
        loadSuggestions()
+        // Screen-level auto-recovery (issue #1245): re-run whichever pane
+        // failed while the server was unreachable once health returns.
+        viewModelScope.launch {
+            networkStatus.recoveries().collect {
+                val s = internal.value
+                if (s.suggestions is SuggestionState.Error) loadSuggestions()
+                if (s.results is ResultsState.Error) runSearch()
+            }
+        }
    }

    fun setQuery(value: String) {
@@ -19,6 +19,8 @@ import androidx.lifecycle.ViewModel
 import androidx.lifecycle.compose.collectAsStateWithLifecycle
 import androidx.lifecycle.viewModelScope
 import com.fabledsword.minstrel.api.ErrorCopy
+import com.fabledsword.minstrel.connectivity.NetworkStatusController
+import com.fabledsword.minstrel.connectivity.recoveries
 import com.fabledsword.minstrel.history.data.HistoryEntry
 import com.fabledsword.minstrel.history.data.HistoryRepository
 import com.fabledsword.minstrel.models.TrackRef
@@ -26,6 +28,7 @@ import com.fabledsword.minstrel.player.PlayerController
 import com.fabledsword.minstrel.shared.UiState
 import com.fabledsword.minstrel.shared.widgets.TrackRow
 import com.fabledsword.minstrel.shared.widgets.EmptyState
+import com.fabledsword.minstrel.shared.widgets.ErrorRetry
 import com.fabledsword.minstrel.shared.widgets.LoadingCentered
 import com.fabledsword.minstrel.shared.widgets.PullToRefreshScaffold
 import com.fabledsword.minstrel.shared.widgets.TrackCoverThumb
@@ -56,6 +59,7 @@ private const val SHARE_STOP_TIMEOUT_MS = 5_000L
 class HistoryTabViewModel @Inject constructor(
    private val repository: HistoryRepository,
    private val player: PlayerController,
+    networkStatus: NetworkStatusController,
 ) : ViewModel() {

    private val refreshError = MutableStateFlow<String?>(null)
@@ -82,6 +86,11 @@ class HistoryTabViewModel @Inject constructor(

    init {
        refresh()
+        // Screen-level auto-recovery (issue #1245): re-pull when server
+        // health returns, so a load that failed offline heals unprompted.
+        viewModelScope.launch {
+            networkStatus.recoveries().collect { refresh() }
+        }
    }

    fun refresh(): Job = viewModelScope.launch {
@@ -116,9 +125,10 @@ fun HistoryTab(
                title = "No listening history yet",
                body = "Play something — your recent plays will show up here.",
            )
-            is UiState.Error -> EmptyState(
+            is UiState.Error -> ErrorRetry(
                title = "Couldn't load history",
-                body = s.message,
+                message = s.message,
+                onRetry = { viewModel.refresh() },
            )
            is UiState.Success -> HistoryList(
                entries = s.data,
@@ -55,6 +55,7 @@ import com.composables.icons.lucide.Lucide
 import com.composables.icons.lucide.Music
 import com.fabledsword.minstrel.api.ErrorCopy
 import com.fabledsword.minstrel.connectivity.ServerHealth
+import com.fabledsword.minstrel.connectivity.recoveries
 import com.fabledsword.minstrel.home.data.HomeRepository
 import com.fabledsword.minstrel.library.data.LibraryRepository
 import com.fabledsword.minstrel.library.widgets.AlbumCard
@@ -77,6 +78,7 @@ import com.fabledsword.minstrel.playlists.widgets.PlaylistPlaceholderCard
 import com.fabledsword.minstrel.shared.UiState
 import com.fabledsword.minstrel.shared.asCacheFirstStateFlow
 import com.fabledsword.minstrel.shared.widgets.EmptyState
+import com.fabledsword.minstrel.shared.widgets.ErrorRetry
 import com.fabledsword.minstrel.shared.widgets.HorizontalScrollRow
 import com.fabledsword.minstrel.shared.widgets.MinstrelTopAppBar
 import com.fabledsword.minstrel.shared.widgets.PullToRefreshScaffold
@@ -95,6 +97,7 @@ import kotlinx.coroutines.flow.combine
 import kotlinx.coroutines.flow.map
 import kotlinx.coroutines.flow.receiveAsFlow
 import kotlinx.coroutines.flow.stateIn
+import kotlinx.coroutines.flow.filter
 import kotlinx.coroutines.launch
 import javax.inject.Inject

@@ -139,6 +142,7 @@ class HomeViewModel @Inject constructor(
    private val libraryRepository: LibraryRepository,
    private val player: com.fabledsword.minstrel.player.PlayerController,
    private val shuffleSource: com.fabledsword.minstrel.cache.ShuffleSource,
+    private val eventsStream: com.fabledsword.minstrel.events.EventsStream,
    networkStatus: com.fabledsword.minstrel.connectivity.NetworkStatusController,
 ) : ViewModel() {

@@ -165,8 +169,31 @@ class HomeViewModel @Inject constructor(
    /** Transient snackbar messages from offline-pool taps. */
    val transientMessages: Flow<String> = poolMessages.receiveAsFlow()

+    /**
+     * Copy for the most recent /home/index refresh failure; null once a
+     * refresh succeeds. Folded into [uiState] so an empty cache + failed
+     * refresh renders as Error (with retry) instead of masquerading as
+     * the "Welcome to Minstrel" empty state.
+     */
+    private val refreshError = MutableStateFlow<String?>(null)
+
    init {
        refresh()
+        // Screen-level auto-recovery (issue #1245): a Home that failed to
+        // load while the server was unreachable re-pulls itself the moment
+        // health returns — same idiom as SyncController, one layer up.
+        viewModelScope.launch {
+            networkStatus.recoveries().collect { refresh() }
+        }
+        // #968: the daily 03:00 rebuild (and manual refresh) emit
+        // playlist.system_rebuilt; re-pull Home so the system-playlist tiles
+        // and You-might-like rows reflect the new snapshot without a manual
+        // reload. Mirrors the web SSE consumer.
+        viewModelScope.launch {
+            eventsStream.events
+                .filter { it.kind == "playlist.system_rebuilt" }
+                .collect { refresh() }
+        }
    }

    /**
@@ -278,7 +305,14 @@ class HomeViewModel @Inject constructor(
     * actual completion before hiding the indicator.
     */
    fun refresh(): Job = viewModelScope.launch {
-        val home = launch { runCatching { homeRepository.refreshIndex() } }
+        refreshError.value = null
+        val home = launch {
+            // /home/index is the load-bearing pull: its failure drives the
+            // empty-cache Error state. A failure over a populated cache
+            // stays silent — cached sections beat a full-screen error.
+            runCatching { homeRepository.refreshIndex() }
+                .onFailure { refreshError.value = ErrorCopy.fromThrowable(it) }
+        }
        val lists = launch { runCatching { playlistsRepository.refreshList() } }
        val status = launch {
            runCatching { homeRepository.getSystemPlaylistsStatus() }
@@ -325,9 +359,17 @@ class HomeViewModel @Inject constructor(
    }

    private fun combineHomeFlows() =
-        observeHomeSections().combine(playlistsRepository.observeAll()) { sections, playlists ->
+        combine(
+            observeHomeSections(),
+            playlistsRepository.observeAll(),
+            refreshError,
+        ) { sections, playlists, err ->
            val merged = sections.copy(playlists = playlists)
-            if (merged.isAllEmpty) UiState.Empty else UiState.Success(merged)
+            when {
+                !merged.isAllEmpty -> UiState.Success(merged)
+                err != null -> UiState.Error(err)
+                else -> UiState.Empty
+            }
        }
 }

@@ -378,9 +420,10 @@ fun HomeScreen(
                            "settings, then come back here for system playlists " +
                            "and recommendations.",
                    )
-                    is UiState.Error -> EmptyState(
+                    is UiState.Error -> ErrorRetry(
                        title = "Couldn't load home",
-                        body = s.message,
+                        message = s.message,
+                        onRetry = { viewModel.refresh() },
                    )
                    is UiState.Success -> HomeSuccessContent(
                        sections = s.data,
@@ -53,7 +53,7 @@ import com.fabledsword.minstrel.nav.AlbumDetail
 import com.fabledsword.minstrel.nav.ArtistDetail
 import com.fabledsword.minstrel.shared.formatDuration
 import com.fabledsword.minstrel.shared.widgets.TrackRow
-import com.fabledsword.minstrel.shared.widgets.EmptyState
+import com.fabledsword.minstrel.shared.widgets.ErrorRetry
 import com.fabledsword.minstrel.shared.widgets.LikeButton
 import com.fabledsword.minstrel.shared.widgets.PullToRefreshScaffold
 import com.fabledsword.minstrel.shared.widgets.ServerImage
@@ -116,9 +116,10 @@ private fun AlbumDetailStateContent(
        when (val s = state) {
            is AlbumDetailUiState.Loading ->
                if (s.seed != null) SeededAlbumLoading(s.seed) else SkeletonTrackList()
-            is AlbumDetailUiState.Error -> EmptyState(
+            is AlbumDetailUiState.Error -> ErrorRetry(
                title = "Couldn't load album",
-                body = s.message,
+                message = s.message,
+                onRetry = { viewModel.refresh() },
            )
            is AlbumDetailUiState.Success -> {
                val albumLiked by viewModel.albumLiked.collectAsStateWithLifecycle()
@@ -5,6 +5,8 @@ import androidx.lifecycle.ViewModel
 import androidx.lifecycle.viewModelScope
 import androidx.navigation.toRoute
 import com.fabledsword.minstrel.api.ErrorCopy
+import com.fabledsword.minstrel.connectivity.NetworkStatusController
+import com.fabledsword.minstrel.connectivity.recoveries
 import com.fabledsword.minstrel.library.data.LibraryRepository
 import com.fabledsword.minstrel.likes.data.LikesRepository
 import com.fabledsword.minstrel.models.AlbumDetailRef
@@ -36,6 +38,7 @@ class AlbumDetailViewModel @Inject constructor(
    private val likes: LikesRepository,
    private val player: PlayerController,
    private val seedCache: DetailSeedCache,
+    networkStatus: NetworkStatusController,
    savedStateHandle: SavedStateHandle,
 ) : ViewModel() {

@@ -64,6 +67,14 @@ class AlbumDetailViewModel @Inject constructor(

    init {
        refresh()
+        // Screen-level auto-recovery (issue #1245): a detail that failed to
+        // load while the server was unreachable re-fetches when health
+        // returns, so coming back to the screen shows content, not an error.
+        viewModelScope.launch {
+            networkStatus.recoveries().collect {
+                if (internal.value is AlbumDetailUiState.Error) refresh()
+            }
+        }
    }

    fun refresh(): Job = viewModelScope.launch {
@@ -56,7 +56,7 @@ import com.fabledsword.minstrel.models.albumCoverPath
 import com.fabledsword.minstrel.nav.AlbumDetail
 import com.fabledsword.minstrel.nav.ArtistDetail
 import com.fabledsword.minstrel.shared.formatDuration
-import com.fabledsword.minstrel.shared.widgets.EmptyState
+import com.fabledsword.minstrel.shared.widgets.ErrorRetry
 import com.fabledsword.minstrel.shared.widgets.HorizontalScrollRow
 import com.fabledsword.minstrel.shared.widgets.LikeButton
 import com.fabledsword.minstrel.shared.widgets.PullToRefreshScaffold
@@ -107,9 +107,10 @@ fun ArtistDetailScreen(
                        } else {
                            SkeletonArtistAlbumsGrid()
                        }
-                    is ArtistDetailUiState.Error -> EmptyState(
+                    is ArtistDetailUiState.Error -> ErrorRetry(
                        title = "Couldn't load artist",
-                        body = s.message,
+                        message = s.message,
+                        onRetry = { viewModel.refresh() },
                    )
                    is ArtistDetailUiState.Success ->
                        ArtistSuccessBody(s, viewModel, playerViewModel, navController)
@@ -5,6 +5,8 @@ import androidx.lifecycle.ViewModel
 import androidx.lifecycle.viewModelScope
 import androidx.navigation.toRoute
 import com.fabledsword.minstrel.api.ErrorCopy
+import com.fabledsword.minstrel.connectivity.NetworkStatusController
+import com.fabledsword.minstrel.connectivity.recoveries
 import com.fabledsword.minstrel.library.data.LibraryRepository
 import com.fabledsword.minstrel.likes.data.LikesRepository
 import com.fabledsword.minstrel.models.ArtistDetailRef
@@ -45,6 +47,7 @@ class ArtistDetailViewModel @Inject constructor(
    private val likes: LikesRepository,
    private val player: PlayerController,
    private val seedCache: DetailSeedCache,
+    networkStatus: NetworkStatusController,
    savedStateHandle: SavedStateHandle,
 ) : ViewModel() {

@@ -69,6 +72,19 @@ class ArtistDetailViewModel @Inject constructor(

    init {
        refresh()
+        // Screen-level auto-recovery (issue #1245). From Error, redo the
+        // whole load; from Success, re-pull just the secondary sections —
+        // their fetch failures are swallowed to emptyList, so a dead zone
+        // during the first load leaves them permanently absent otherwise.
+        viewModelScope.launch {
+            networkStatus.recoveries().collect {
+                when (internal.value) {
+                    is ArtistDetailUiState.Error -> refresh()
+                    is ArtistDetailUiState.Success -> loadSecondarySections()
+                    is ArtistDetailUiState.Loading -> Unit
+                }
+            }
+        }
    }

    fun toggleLikeArtist() {
@@ -24,11 +24,17 @@ class LibraryViewModel @Inject constructor(
        combine(
            repository.observeArtists(),
            repository.observeAlbums(),
-        ) { artists, albums ->
-            if (artists.isEmpty() && albums.isEmpty()) {
-                UiState.Empty
-            } else {
-                UiState.Success(LibraryData(artists, albums))
+            syncController.lastSyncError,
+        ) { artists, albums, syncError ->
+            when {
+                artists.isNotEmpty() || albums.isNotEmpty() ->
+                    UiState.Success(LibraryData(artists, albums))
+                // Empty cache + failed sync is a load failure, not an empty
+                // library — surface it so the user gets a Retry instead of
+                // the welcome copy. Heals automatically: SyncController
+                // re-syncs on health recovery, clearing lastSyncError.
+                syncError != null -> UiState.Error(syncError)
+                else -> UiState.Empty
            }
        }
            .asCacheFirstStateFlow(viewModelScope)
@@ -25,6 +25,9 @@ import androidx.lifecycle.ViewModel
 import androidx.lifecycle.compose.collectAsStateWithLifecycle
 import androidx.lifecycle.viewModelScope
 import androidx.navigation.NavHostController
+import com.fabledsword.minstrel.api.ErrorCopy
+import com.fabledsword.minstrel.connectivity.NetworkStatusController
+import com.fabledsword.minstrel.connectivity.recoveries
 import com.fabledsword.minstrel.likes.data.LikesRepository
 import com.fabledsword.minstrel.library.widgets.AlbumCard
 import com.fabledsword.minstrel.library.widgets.ArtistCard
@@ -38,6 +41,7 @@ import com.fabledsword.minstrel.shared.UiState
 import com.fabledsword.minstrel.shared.asCacheFirstStateFlow
 import com.fabledsword.minstrel.shared.widgets.TrackRow
 import com.fabledsword.minstrel.shared.widgets.EmptyState
+import com.fabledsword.minstrel.shared.widgets.ErrorRetry
 import com.fabledsword.minstrel.shared.widgets.HorizontalScrollRow
 import com.fabledsword.minstrel.shared.widgets.LikeButton
 import com.fabledsword.minstrel.shared.widgets.LoadingCentered
@@ -46,6 +50,7 @@ import com.fabledsword.minstrel.shared.widgets.TrackCoverThumb
 import com.fabledsword.minstrel.shared.widgets.trackactions.TrackActionsButton
 import dagger.hilt.android.lifecycle.HiltViewModel
 import kotlinx.coroutines.Job
+import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.StateFlow
 import kotlinx.coroutines.flow.combine
 import kotlinx.coroutines.launch
@@ -68,14 +73,25 @@ data class LikedSections(
 class LikedTabViewModel @Inject constructor(
    private val repository: LikesRepository,
    private val player: PlayerController,
+    networkStatus: NetworkStatusController,
 ) : ViewModel() {

+    /** Copy for the most recent refresh failure; null once one succeeds. */
+    private val refreshError = MutableStateFlow<String?>(null)
+
    init {
        refresh()
+        // Screen-level auto-recovery (issue #1245): re-pull when server
+        // health returns, so a load that failed offline heals unprompted.
+        viewModelScope.launch {
+            networkStatus.recoveries().collect { refresh() }
+        }
    }

    fun refresh(): Job = viewModelScope.launch {
+        refreshError.value = null
        runCatching { repository.refreshIds() }
+            .onFailure { refreshError.value = ErrorCopy.fromThrowable(it) }
    }

    /**
@@ -92,9 +108,16 @@ class LikedTabViewModel @Inject constructor(
        repository.observeLikedArtists(),
        repository.observeLikedAlbums(),
        repository.observeLikedTracks(),
-    ) { artists, albums, tracks ->
+        refreshError,
+    ) { artists, albums, tracks, err ->
        val sections = LikedSections(artists, albums, tracks)
-        if (sections.isAllEmpty) UiState.Empty else UiState.Success(sections)
+        when {
+            !sections.isAllEmpty -> UiState.Success(sections)
+            // Empty cache + failed refresh is a load failure, not "no
+            // likes yet" — surface Error so the user gets a Retry.
+            err != null -> UiState.Error(err)
+            else -> UiState.Empty
+        }
    }.asCacheFirstStateFlow(viewModelScope)

    /**
@@ -130,9 +153,10 @@ fun LikedTab(
                body = "Tap the heart on an artist, album, or track to start " +
                    "building your liked collection.",
            )
-            is UiState.Error -> EmptyState(
+            is UiState.Error -> ErrorRetry(
                title = "Couldn't load likes",
-                body = s.message,
+                message = s.message,
+                onRetry = { viewModel.refresh() },
            )
            is UiState.Success -> LikedContent(
                sections = s.data,
@@ -16,4 +16,11 @@ data class UserRef(
    val id: String,
    val username: String,
    val isAdmin: Boolean = false,
+    /**
+     * Account-level diagnostics opt-in (M9). NOT present in the login
+     * response (that's the narrow UserView) — populated by the /api/me
+     * refresh in AuthController so a remote admin flip reaches the
+     * device. Default false until the first refresh.
+     */
+    val debugModeEnabled: Boolean = false,
 )
@@ -18,4 +18,5 @@ data class MyProfileWire(
    @SerialName("display_name") val displayName: String? = null,
    val email: String? = null,
    @SerialName("is_admin") val isAdmin: Boolean = false,
+    @SerialName("debug_mode_enabled") val debugModeEnabled: Boolean = false,
 )
@@ -14,6 +14,8 @@ import androidx.media3.session.MediaController
 import androidx.media3.session.SessionToken
 import com.fabledsword.minstrel.di.ApplicationScope
 import com.fabledsword.minstrel.models.TrackRef
+import com.fabledsword.minstrel.playlists.data.PlaylistsRepository
+import com.fabledsword.minstrel.playlists.data.toPlayableTrackRefs
 import com.fabledsword.minstrel.shared.resolveServerUrl
 import dagger.hilt.android.qualifiers.ApplicationContext
 import kotlinx.coroutines.CoroutineScope
@@ -63,6 +65,7 @@ class PlayerController @Inject constructor(
    @ApplicationContext private val context: Context,
    @ApplicationScope private val scope: CoroutineScope,
    private val radio: RadioController,
+    private val playlists: PlaylistsRepository,
    private val playerFactory: PlayerFactory,
    private val activeUpnpHolder: com.fabledsword.minstrel.player.output.ActiveUpnpHolder,
    private val remoteState: RemotePlayerState,
@@ -111,6 +114,13 @@ class PlayerController @Inject constructor(
     */
    private var lastEvaluatedItemIndex: Int = -1

+    /**
+     * #968: self-heal budget — re-pulls of a stale refreshable queue since
+     * the last successful play. Capped so a still-broken refresh can't loop;
+     * reset when any track loads with real audio.
+     */
+    private var selfHealAttempts = 0
+
    /**
     * Stable queue snapshot kept in sync with the player's MediaItems —
     * the player's own getMediaItem(index) returns Media3 types; we keep
@@ -351,7 +361,12 @@ class PlayerController @Inject constructor(
        if (current == null || upnpEngaged) return
        val duration = controller.duration
        val isZeroDuration = duration <= 0L || duration == androidx.media3.common.C.TIME_UNSET
-        if (!isZeroDuration) return
+        if (!isZeroDuration) {
+            // A track loaded with real audio — clear the self-heal budget so
+            // a later stale queue can recover again.
+            selfHealAttempts = 0
+            return
+        }
        playbackErrorEventsChannel.trySend(
            PlaybackErrorEvent(
                trackId = current.id,
@@ -367,6 +382,58 @@ class PlayerController @Inject constructor(
        }
    }

+    /**
+     * #968: the queue is fully unplayable (every track failed to load). If it
+     * came from a refreshable source — a system playlist (bare-variant source)
+     * or radio ("radio:<seed>") — the snapshot is probably stale (app/tab left
+     * open across the daily rebuild); re-pull it and resume instead of stopping.
+     * Bounded by [selfHealAttempts]. Album / artist / user-playlist / offline
+     * sources have nothing to refresh — stop.
+     */
+    private fun selfHealOrStop(controller: MediaController) {
+        val source = controller.currentMediaItem
+            ?.mediaMetadata?.extras?.getString(MINSTREL_SOURCE_KEY)
+        if (source == null || selfHealAttempts >= MAX_SELF_HEAL_ATTEMPTS) {
+            controller.stop()
+            return
+        }
+        when {
+            source.startsWith("radio:") -> {
+                selfHealAttempts++
+                scope.launch { selfHealRadio(source.removePrefix("radio:")) }
+            }
+            !source.contains(':') -> { // bare variant = refreshable system playlist
+                selfHealAttempts++
+                scope.launch { selfHealSystem(source) }
+            }
+            else -> controller.stop()
+        }
+    }
+
+    private suspend fun selfHealSystem(variant: String) {
+        val refs = runCatching { playlists.systemShuffle(variant).tracks.toPlayableTrackRefs() }
+            .getOrDefault(emptyList())
+        if (refs.isEmpty()) {
+            stopOnControllerThread()
+            return
+        }
+        setQueue(refs, initialIndex = 0, source = variant)
+    }
+
+    private suspend fun selfHealRadio(seedTrackId: String) {
+        val refs = runCatching { radio.seed(seedTrackId) }.getOrDefault(emptyList())
+        if (refs.isEmpty()) {
+            stopOnControllerThread()
+            return
+        }
+        setQueue(refs, initialIndex = 0, source = "radio:$seedTrackId")
+    }
+
+    private fun stopOnControllerThread() {
+        val controller = mediaController ?: return
+        runOnControllerThread(controller) { controller.stop() }
+    }
+
    // ── Internal: async connect + Listener-driven UI state sync ──────────

    private suspend fun connectAndObserve() {
@@ -417,6 +484,17 @@ class PlayerController @Inject constructor(
                            detail = error.message,
                        ),
                    )
+                    // A failed load leaves the player IDLE; advance past the bad
+                    // track and re-prepare so one unplayable item doesn't strand
+                    // playback (mirrors the zero_duration skip). At the end of a
+                    // fully-unplayable queue, try to self-heal a stale refreshable
+                    // source before stopping.
+                    if (controller.hasNextMediaItem()) {
+                        controller.seekToNextMediaItem()
+                        controller.prepare()
+                    } else {
+                        selfHealOrStop(controller)
+                    }
                }

                override fun onMediaItemTransition(
@@ -763,6 +841,10 @@ class PlayerController @Inject constructor(
 // they don't need this poll.
 private const val POSITION_POLL_INTERVAL_MS = 500L

+// #968: at most one stale-queue self-heal re-pull per exhaustion (reset on
+// the next successful play) so a still-broken refresh can't loop.
+private const val MAX_SELF_HEAL_ATTEMPTS = 1
+
 /**
 * Structured playback failure event for [PlaybackErrorReporter]. Drives
 * both the user-facing snackbar ("Couldn't play X — skipping") and the
@@ -133,7 +133,7 @@ private fun RouteRow(
                    maxLines = 2,
                    overflow = TextOverflow.Ellipsis,
                )
-                val subtitle = route.description ?: defaultSubtitle(route)
+                val subtitle = route.description ?: defaultSubtitle(route, isSelected)
                Text(
                    text = subtitle,
                    style = MaterialTheme.typography.bodySmall,
@@ -198,10 +198,13 @@ private fun MulticastHintRow() {
    }
 }

-private fun defaultSubtitle(route: OutputRoute): String = when (route.kind) {
+// isSelected (route == the active/selected route) drives the Bluetooth
+// "Connected" subtitle. RouteInfo.connectionState can't — it stays
+// DISCONNECTED for local SYSTEM routes even when they're in use.
+private fun defaultSubtitle(route: OutputRoute, isSelected: Boolean): String = when (route.kind) {
    OutputRoute.Kind.BuiltIn -> "Phone speaker"
    OutputRoute.Kind.Wired -> "Wired"
-    OutputRoute.Kind.Bluetooth -> if (route.isConnected) "Connected" else "Available"
+    OutputRoute.Kind.Bluetooth -> if (isSelected) "Connected" else "Available"
    OutputRoute.Kind.Cast -> "Cast"
    OutputRoute.Kind.Other -> "Available"
 }
@@ -21,7 +21,6 @@ data class OutputRoute(
    val description: String?,
    val kind: Kind,
    val protocol: Protocol,
-    val isConnected: Boolean,
 ) {
    enum class Kind { BuiltIn, Wired, Bluetooth, Cast, Other }

@@ -43,9 +42,11 @@ data class OutputRoute(
        /**
         * Lift a MediaRouter [route] into the domain model. Kind is
         * inferred from [MediaRouter.RouteInfo.getDeviceType]; unknown
-         * device types fall through to [Kind.Other]. The
-         * `connectionState` proxy is good enough for the chip's
-         * "Connected"/"Available" subtitle.
+         * device types fall through to [Kind.Other]. "Active" is NOT an
+         * intrinsic of the route — the caller derives it by comparing to
+         * the selected route (RouteSnapshot.current), because
+         * RouteInfo.connectionState only reflects remote-route handshakes
+         * and stays DISCONNECTED for local SYSTEM routes even when in use.
         */
        fun fromRouteInfo(route: MediaRouter.RouteInfo): OutputRoute {
            val kind = when (route.deviceType) {
@@ -58,15 +59,12 @@ data class OutputRoute(
                MediaRouter.RouteInfo.DEVICE_TYPE_SPEAKER -> Kind.Other
                else -> Kind.Other
            }
-            val connected =
-                route.connectionState == MediaRouter.RouteInfo.CONNECTION_STATE_CONNECTED
            return OutputRoute(
                id = route.id,
                name = route.name,
                description = route.description,
                kind = kind,
                protocol = Protocol.SYSTEM,
-                isConnected = connected,
            )
        }

@@ -76,10 +74,10 @@ data class OutputRoute(
         * network speakers into the same `OutputPickerController`
         * routes stream the system routes come through.
         *
-         * `isConnected = false` because UPnP devices have no
-         * MediaRouter connection-state concept — they're always
-         * "available" on the LAN, and the picker's selected-route
-         * rendering handles the "currently playing" indicator.
+         * UPnP devices have no MediaRouter connection-state concept —
+         * they're always "available" on the LAN, and the picker's
+         * selected-route rendering handles the "currently playing"
+         * indicator.
         *
         * Subtitle is `manufacturer modelName` joined by a single
         * space, falling back to "Network speaker" when both fields
@@ -96,7 +94,6 @@ data class OutputRoute(
                description = description,
                kind = Kind.Other,
                protocol = Protocol.UPNP,
-                isConnected = false,
            )
        }
    }
@@ -28,15 +28,17 @@ import androidx.compose.material3.IconButton
 import androidx.compose.material3.MaterialTheme
 import androidx.compose.material3.OutlinedButton
 import androidx.compose.material3.Scaffold
+import androidx.compose.material3.SnackbarDuration
+import androidx.compose.material3.SnackbarHost
+import androidx.compose.material3.SnackbarHostState
+import androidx.compose.material3.SnackbarResult
 import androidx.compose.material3.Text
 import androidx.compose.material3.TopAppBar
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.LaunchedEffect
 import androidx.compose.runtime.collectAsState
 import androidx.compose.runtime.getValue
-import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.remember
-import androidx.compose.runtime.setValue
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.draw.clip
@@ -56,6 +58,8 @@ import com.composables.icons.lucide.Play
 import com.composables.icons.lucide.RefreshCw
 import com.composables.icons.lucide.Shuffle
 import com.fabledsword.minstrel.api.ErrorCopy
+import com.fabledsword.minstrel.connectivity.NetworkStatusController
+import com.fabledsword.minstrel.connectivity.recoveries
 import com.fabledsword.minstrel.events.EventsStream
 import com.fabledsword.minstrel.events.LiveEvent
 import com.fabledsword.minstrel.models.PlaylistRef
@@ -72,6 +76,7 @@ import com.fabledsword.minstrel.playlists.data.PlaylistsRepository
 import com.fabledsword.minstrel.playlists.data.toPlayableTrackRefs
 import com.fabledsword.minstrel.shared.formatDuration
 import com.fabledsword.minstrel.shared.widgets.TrackRow
+import com.fabledsword.minstrel.shared.widgets.ErrorRetry
 import com.fabledsword.minstrel.shared.widgets.LikeButton
 import com.fabledsword.minstrel.shared.widgets.PullToRefreshScaffold
 import com.fabledsword.minstrel.shared.widgets.SkeletonTrackRow
@@ -113,6 +118,7 @@ class PlaylistDetailViewModel @Inject constructor(
    private val player: PlayerController,
    private val eventsStream: EventsStream,
    private val seedCache: DetailSeedCache,
+    networkStatus: NetworkStatusController,
    savedStateHandle: SavedStateHandle,
 ) : ViewModel() {

@@ -139,6 +145,15 @@ class PlaylistDetailViewModel @Inject constructor(
    private val regeneratedChannel = Channel<String>(Channel.BUFFERED)
    val regenerated: Flow<String> = regeneratedChannel.receiveAsFlow()

+    /**
+     * #980: a system-playlist rebuild landed (SSE) while this screen is open —
+     * its list is now stale and the uuid has rotated. Drives a "this mix was
+     * refreshed → Refresh" snackbar rather than yanking the user; Refresh
+     * re-resolves the variant via [reloadRebuilt].
+     */
+    private val staleInternal = MutableStateFlow(false)
+    val stale: StateFlow<Boolean> = staleInternal.asStateFlow()
+
    val likedTrackIds: StateFlow<Set<String>> =
        likes.observeLikedTrackIds()
            .stateIn(
@@ -154,6 +169,14 @@ class PlaylistDetailViewModel @Inject constructor(
                .filter { it.kind.startsWith("playlist.") }
                .collect { handlePlaylistEvent(it) }
        }
+        // Screen-level auto-recovery (issue #1245): a detail that failed to
+        // load while the server was unreachable re-fetches when health
+        // returns, instead of waiting for the Retry tap.
+        viewModelScope.launch {
+            networkStatus.recoveries().collect {
+                if (internal.value is PlaylistDetailUiState.Error) refresh()
+            }
+        }
    }

    /**
@@ -163,6 +186,12 @@ class PlaylistDetailViewModel @Inject constructor(
     * ignored — the playlists-list screen handles those.
     */
    private fun handlePlaylistEvent(event: LiveEvent) {
+        // #980: a system rebuild carries no playlist_id (it rebuilds all of the
+        // user's system mixes at once) — handle it before the per-id filter.
+        if (event.kind == "playlist.system_rebuilt") {
+            markStaleIfSystem()
+            return
+        }
        val eventPlaylistId = event.data["playlist_id"]?.jsonPrimitive?.contentOrNull
        if (eventPlaylistId != playlistId) return
        when (event.kind) {
@@ -171,6 +200,14 @@ class PlaylistDetailViewModel @Inject constructor(
        }
    }

+    private fun markStaleIfSystem() {
+        val playlist = (internal.value as? PlaylistDetailUiState.Success)
+            ?.detail?.playlist ?: return
+        if (playlist.systemVariant?.takeIf { playlist.refreshable } != null) {
+            staleInternal.value = true
+        }
+    }
+
    fun toggleLikeTrack(trackId: String) {
        val desired = trackId !in likedTrackIds.value
        viewModelScope.launch {
@@ -220,6 +257,30 @@ class PlaylistDetailViewModel @Inject constructor(
        }
    }

+    /**
+     * #980: user tapped Refresh on the stale-view snackbar. The rebuild
+     * already ran server-side (uuid rotated) — re-resolve the variant to the
+     * fresh playlist id and hand it to [regenerated] for navigate-replace.
+     * Unlike [regenerate] this does NOT trigger another rebuild.
+     */
+    fun reloadRebuilt() {
+        val playlist = (internal.value as? PlaylistDetailUiState.Success)
+            ?.detail?.playlist ?: return
+        val variant = playlist.systemVariant?.takeIf { playlist.refreshable } ?: return
+        staleInternal.value = false
+        viewModelScope.launch {
+            runCatching { repository.systemShuffle(variant).playlist.id }
+                .onSuccess { newId ->
+                    if (newId.isNotEmpty()) regeneratedChannel.trySend(newId)
+                }
+        }
+    }
+
+    /** #980: user dismissed the stale-view snackbar without refreshing. */
+    fun dismissStale() {
+        staleInternal.value = false
+    }
+
    /** Play the available tracks starting at [startTrackId] (or first available). */
    fun play(tracks: List<PlaylistTrackRef>, startTrackId: String?) {
        val refs = tracks.toPlayableTrackRefs()
@@ -261,8 +322,25 @@ fun PlaylistDetailScreen(
            }
        }
    }
+    // #980: a rebuild landed while this system-playlist screen is open. Offer a
+    // non-intrusive "refreshed → Refresh" snackbar; Refresh re-resolves the
+    // rotated uuid (via the regenerated navigate-replace flow).
+    val snackbarHostState = remember { SnackbarHostState() }
+    val stale by viewModel.stale.collectAsState()
+    LaunchedEffect(stale) {
+        if (stale) {
+            val result = snackbarHostState.showSnackbar(
+                message = "This mix was refreshed",
+                actionLabel = "Refresh",
+                duration = SnackbarDuration.Indefinite,
+            )
+            if (result == SnackbarResult.ActionPerformed) viewModel.reloadRebuilt()
+            else viewModel.dismissStale()
+        }
+    }
    Scaffold(
        modifier = Modifier.fillMaxSize(),
+        snackbarHost = { SnackbarHost(snackbarHostState) },
        topBar = {
            TopAppBar(
                title = { Text(currentTitle(state)) },
@@ -301,7 +379,11 @@ private fun PlaylistDetailContent(
    Crossfade(targetState = state::class, label = "playlist-detail") { _ -> when (val s = state) {
        is PlaylistDetailUiState.Loading ->
            s.seed?.let { SeededPlaylistLoading(it) } ?: SkeletonPlaylistTrackList()
-        is PlaylistDetailUiState.Error -> ErrorBlock(s.message, viewModel::refresh)
+        is PlaylistDetailUiState.Error -> ErrorRetry(
+            title = "Couldn't load playlist",
+            message = s.message,
+            onRetry = { viewModel.refresh() },
+        )
        is PlaylistDetailUiState.Success -> {
            val likedTrackIds by viewModel.likedTrackIds.collectAsState()
            val playerState by playerViewModel.uiState.collectAsState()
@@ -585,33 +667,6 @@ private fun SeededPlaylistLoading(seed: PlaylistRef) {
    }
 }

-@Composable
-private fun ErrorBlock(message: String, onRetry: () -> Unit) {
-    var retried by remember { mutableStateOf(false) }
-    Column(
-        modifier = Modifier
-            .fillMaxSize()
-            .padding(24.dp),
-        verticalArrangement = Arrangement.Center,
-        horizontalAlignment = Alignment.CenterHorizontally,
-    ) {
-        Text(
-            text = message,
-            color = MaterialTheme.colorScheme.error,
-            style = MaterialTheme.typography.bodyLarge,
-        )
-        Spacer(Modifier.height(12.dp))
-        OutlinedButton(
-            onClick = {
-                if (!retried) {
-                    retried = true
-                    onRetry()
-                }
-            },
-        ) { Text("Retry") }
-    }
-}
-
 // ─── Helpers ─────────────────────────────────────────────────────────

 private const val UNAVAILABLE_ALPHA = 0.4f
@@ -27,8 +27,10 @@ import androidx.lifecycle.ViewModel
 import androidx.lifecycle.compose.collectAsStateWithLifecycle
 import androidx.lifecycle.viewModelScope
 import androidx.navigation.NavHostController
+import com.fabledsword.minstrel.api.ErrorCopy
 import com.fabledsword.minstrel.connectivity.NetworkStatusController
 import com.fabledsword.minstrel.connectivity.ServerHealth
+import com.fabledsword.minstrel.connectivity.recoveries
 import com.fabledsword.minstrel.events.EventsStream
 import com.fabledsword.minstrel.models.PlaylistRef
 import com.fabledsword.minstrel.nav.PlaylistDetail
@@ -40,6 +42,7 @@ import com.fabledsword.minstrel.shared.UiState
 import com.fabledsword.minstrel.shared.asCacheFirstStateFlow
 import com.fabledsword.minstrel.playlists.widgets.PlaylistCard
 import com.fabledsword.minstrel.shared.widgets.EmptyState
+import com.fabledsword.minstrel.shared.widgets.ErrorRetry
 import com.fabledsword.minstrel.shared.widgets.LoadingCentered
 import com.fabledsword.minstrel.shared.widgets.MinstrelTopAppBar
 import com.fabledsword.minstrel.shared.widgets.PullToRefreshScaffold
@@ -47,8 +50,10 @@ import dagger.hilt.android.lifecycle.HiltViewModel
 import kotlinx.coroutines.Job
 import kotlinx.coroutines.channels.Channel
 import kotlinx.coroutines.flow.Flow
+import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.SharingStarted
 import kotlinx.coroutines.flow.StateFlow
+import kotlinx.coroutines.flow.combine
 import kotlinx.coroutines.flow.filter
 import kotlinx.coroutines.flow.map
 import kotlinx.coroutines.flow.receiveAsFlow
@@ -84,6 +89,9 @@ class PlaylistsListViewModel @Inject constructor(
            initialValue = false,
        )

+    /** Copy for the most recent list-refresh failure; null once one succeeds. */
+    private val refreshError = MutableStateFlow<String?>(null)
+
    init {
        refresh()
        // Live updates: a playlist created/updated/deleted from another
@@ -93,11 +101,18 @@ class PlaylistsListViewModel @Inject constructor(
                .filter { it.kind.startsWith("playlist.") }
                .collect { refresh() }
        }
+        // Screen-level auto-recovery (issue #1245): re-pull when server
+        // health returns, so a load that failed offline heals unprompted.
+        viewModelScope.launch {
+            networkStatus.recoveries().collect { refresh() }
+        }
    }

    /** Re-pull the playlists list. Returns the Job for pull-to-refresh awaits. */
    fun refresh(): Job = viewModelScope.launch {
+        refreshError.value = null
        runCatching { repository.refreshList() }
+            .onFailure { refreshError.value = ErrorCopy.fromThrowable(it) }
    }

    /** Tile play button: shuffle the playlist's tracks and start at index 0. */
@@ -110,14 +125,15 @@ class PlaylistsListViewModel @Inject constructor(
    }

    val uiState: StateFlow<UiState<List<PlaylistRef>>> =
-        repository.observeAll()
-            .map { list ->
-                if (list.isEmpty()) {
-                    UiState.Empty
-                } else {
-                    UiState.Success(list)
-                }
+        combine(repository.observeAll(), refreshError) { list, err ->
+            when {
+                list.isNotEmpty() -> UiState.Success(list)
+                // Empty cache + failed refresh is a load failure, not "no
+                // playlists yet" — surface Error so the user gets a Retry.
+                err != null -> UiState.Error(err)
+                else -> UiState.Empty
            }
+        }
            .asCacheFirstStateFlow(viewModelScope)
 }

@@ -157,9 +173,10 @@ fun PlaylistsListScreen(
                        "appear once your library has enough plays. Create your " +
                        "own playlist from any album or track in the meantime.",
                )
-                is UiState.Error -> EmptyState(
+                is UiState.Error -> ErrorRetry(
                    title = "Couldn't load playlists",
-                    body = s.message,
+                    message = s.message,
+                    onRetry = { viewModel.refresh() },
                )
                is UiState.Success -> PlaylistsGrid(
                    playlists = s.data,
@@ -27,6 +27,7 @@ import com.composables.icons.lucide.Lucide
 import com.fabledsword.minstrel.models.QuarantineRef
 import com.fabledsword.minstrel.shared.UiState
 import com.fabledsword.minstrel.shared.widgets.EmptyState
+import com.fabledsword.minstrel.shared.widgets.ErrorRetry
 import com.fabledsword.minstrel.shared.widgets.LoadingCentered
 import com.fabledsword.minstrel.shared.widgets.PullToRefreshScaffold
 import com.fabledsword.minstrel.shared.widgets.TrackCoverThumb
@@ -43,9 +44,10 @@ fun HiddenTab(viewModel: HiddenTabViewModel = hiltViewModel()) {
                    "and it'll show up here. The track stays out of system " +
                    "playlists until you unhide it.",
            )
-            is UiState.Error -> EmptyState(
+            is UiState.Error -> ErrorRetry(
                title = "Couldn't load hidden tracks",
-                body = s.message,
+                message = s.message,
+                onRetry = { viewModel.refresh() },
            )
            is UiState.Success -> HiddenList(
                rows = s.data,
@@ -3,6 +3,8 @@ package com.fabledsword.minstrel.quarantine.ui
 import androidx.lifecycle.ViewModel
 import androidx.lifecycle.viewModelScope
 import com.fabledsword.minstrel.api.ErrorCopy
+import com.fabledsword.minstrel.connectivity.NetworkStatusController
+import com.fabledsword.minstrel.connectivity.recoveries
 import com.fabledsword.minstrel.events.EventsStream
 import com.fabledsword.minstrel.models.QuarantineRef
 import com.fabledsword.minstrel.shared.UiState
@@ -24,6 +26,7 @@ private const val SHARE_STOP_TIMEOUT_MS = 5_000L
 class HiddenTabViewModel @Inject constructor(
    private val repository: QuarantineRepository,
    private val eventsStream: EventsStream,
+    networkStatus: NetworkStatusController,
 ) : ViewModel() {

    private val refreshError = MutableStateFlow<String?>(null)
@@ -61,6 +64,11 @@ class HiddenTabViewModel @Inject constructor(
                .filter { it.kind.startsWith("quarantine.") }
                .collect { refresh() }
        }
+        // Screen-level auto-recovery (issue #1245): re-pull when server
+        // health returns, so a load that failed offline heals unprompted.
+        viewModelScope.launch {
+            networkStatus.recoveries().collect { refresh() }
+        }
    }

    fun refresh(): Job = viewModelScope.launch {
@@ -46,6 +46,7 @@ import com.fabledsword.minstrel.shared.UiState
 import com.fabledsword.minstrel.nav.ArtistDetail
 import com.fabledsword.minstrel.nav.Requests
 import com.fabledsword.minstrel.shared.widgets.EmptyState
+import com.fabledsword.minstrel.shared.widgets.ErrorRetry
 import com.fabledsword.minstrel.shared.widgets.LoadingCentered
 import com.fabledsword.minstrel.shared.widgets.MinstrelTopAppBar
 import com.fabledsword.minstrel.shared.widgets.PullToRefreshScaffold
@@ -78,9 +79,10 @@ fun RequestsScreen(
                    body = "Use Discover to ask Lidarr for new music; your " +
                        "requests show up here.",
                )
-                is UiState.Error -> EmptyState(
+                is UiState.Error -> ErrorRetry(
                    title = "Couldn't load requests",
-                    body = s.message,
+                    message = s.message,
+                    onRetry = { viewModel.refresh() },
                )
                is UiState.Success -> RequestList(
                    rows = s.data,
@@ -3,6 +3,8 @@ package com.fabledsword.minstrel.requests.ui
 import androidx.lifecycle.ViewModel
 import androidx.lifecycle.viewModelScope
 import com.fabledsword.minstrel.api.ErrorCopy
+import com.fabledsword.minstrel.connectivity.NetworkStatusController
+import com.fabledsword.minstrel.connectivity.recoveries
 import com.fabledsword.minstrel.events.EventsStream
 import com.fabledsword.minstrel.models.RequestRef
 import com.fabledsword.minstrel.models.RequestStatus
@@ -30,6 +32,7 @@ private const val POLL_INTERVAL_MS = 12_000L
 class RequestsViewModel @Inject constructor(
    private val repository: RequestsRepository,
    private val eventsStream: EventsStream,
+    networkStatus: NetworkStatusController,
 ) : ViewModel() {

    private val internal = MutableStateFlow<UiState<List<RequestRef>>>(UiState.Loading)
@@ -45,6 +48,14 @@ class RequestsViewModel @Inject constructor(
                .collect { silentReload() }
        }
        viewModelScope.launch { pollWhileInFlight() }
+        // Screen-level auto-recovery (issue #1245): a load that failed while
+        // the server was unreachable heals the moment health returns, without
+        // waiting for the next poll tick.
+        viewModelScope.launch {
+            networkStatus.recoveries().collect {
+                if (internal.value is UiState.Error) silentReload()
+            }
+        }
    }

    fun refresh(): Job = viewModelScope.launch {
@@ -71,7 +82,11 @@ class RequestsViewModel @Inject constructor(
     */
    private suspend fun pollWhileInFlight() {
        while (true) {
-            if (hasInFlightRequest()) {
+            // Also retry from a failed load (issue #1245): from UiState.Error
+            // the in-flight predicate can never become true, so without this
+            // the poll never self-heals the screen — e.g. after a transient
+            // 500 that health monitoring (transport-level) never saw.
+            if (hasInFlightRequest() || internal.value is UiState.Error) {
                silentReload()
            }
            delay(POLL_INTERVAL_MS)
@@ -56,6 +56,7 @@ import com.fabledsword.minstrel.nav.AlbumDetail
 import com.fabledsword.minstrel.nav.ArtistDetail
 import com.fabledsword.minstrel.nav.Search as SearchRoute
 import com.fabledsword.minstrel.shared.widgets.TrackRow
+import com.fabledsword.minstrel.shared.widgets.ErrorRetry
 import com.fabledsword.minstrel.shared.widgets.LoadingCentered
 import com.fabledsword.minstrel.shared.widgets.MainAppBarActions
 import com.fabledsword.minstrel.shared.widgets.TrackCoverThumb
@@ -113,6 +114,7 @@ fun SearchScreen(
                onTrackPlay = viewModel::playTrack,
                onNavigateToAlbum = { id -> navController.navigate(AlbumDetail(id)) },
                onNavigateToArtist = { id -> navController.navigate(ArtistDetail(id)) },
+                onRetry = viewModel::retry,
            )
        }
    }
@@ -151,11 +153,16 @@ private fun ResultsPane(
    onTrackPlay: (TrackRef) -> Unit,
    onNavigateToAlbum: (String) -> Unit,
    onNavigateToArtist: (String) -> Unit,
+    onRetry: () -> Unit,
 ) {
    when (state) {
        SearchResultsState.Idle -> CenteredHint("Type to search your library.")
        SearchResultsState.Loading -> LoadingCentered()
-        is SearchResultsState.Error -> CenteredHint("Search failed: ${state.message}")
+        is SearchResultsState.Error -> ErrorRetry(
+            title = "Search failed",
+            message = state.message,
+            onRetry = onRetry,
+        )
        is SearchResultsState.Loaded -> {
            if (state.response.isEmpty) {
                CenteredHint(
@@ -3,6 +3,8 @@ package com.fabledsword.minstrel.search.ui
 import androidx.lifecycle.ViewModel
 import androidx.lifecycle.viewModelScope
 import com.fabledsword.minstrel.api.ErrorCopy
+import com.fabledsword.minstrel.connectivity.NetworkStatusController
+import com.fabledsword.minstrel.connectivity.recoveries
 import com.fabledsword.minstrel.models.SearchResponseRef
 import com.fabledsword.minstrel.models.TrackRef
 import com.fabledsword.minstrel.player.PlayerController
@@ -43,6 +45,7 @@ data class SearchState(
 class SearchViewModel @Inject constructor(
    private val repository: SearchRepository,
    private val player: PlayerController,
+    networkStatus: NetworkStatusController,
 ) : ViewModel() {

    private val queryFlow = MutableStateFlow("")
@@ -69,6 +72,14 @@ class SearchViewModel @Inject constructor(
                    runSearch(q)
                }
        }
+        // Screen-level auto-recovery (issue #1245): a search that failed
+        // while the server was unreachable re-runs when health returns —
+        // the queryFlow pipeline can't, since the text hasn't changed.
+        viewModelScope.launch {
+            networkStatus.recoveries().collect {
+                if (internal.value.results is SearchResultsState.Error) retry()
+            }
+        }
    }

    fun setQuery(value: String) {
@@ -80,6 +91,18 @@ class SearchViewModel @Inject constructor(
        setQuery("")
    }

+    /**
+     * Re-run the current query after a failure. Bypasses the queryFlow
+     * pipeline, whose distinctUntilChanged drops a same-text resubmit —
+     * without this, a transient error pins "Search failed" until the
+     * user edits the query.
+     */
+    fun retry() {
+        val q = internal.value.query.trim()
+        if (q.isEmpty()) return
+        viewModelScope.launch { runSearch(q) }
+    }
+
    /**
     * Tapping a search result builds a queue from the full visible
     * track-results list starting at the tapped entry, matching Flutter.
@@ -28,6 +28,7 @@ import androidx.compose.material3.Scaffold
 import androidx.compose.material3.SegmentedButton
 import androidx.compose.material3.SegmentedButtonDefaults
 import androidx.compose.material3.SingleChoiceSegmentedButtonRow
+import androidx.compose.material3.Switch
 import androidx.compose.material3.Text
 import androidx.compose.material3.TextButton
 import androidx.compose.runtime.Composable
@@ -94,6 +95,7 @@ fun SettingsScreen(
            onPickTheme = themeVm::setThemeMode,
            onNavToRequests = { navController.navigate(Requests) },
            onNavToAdmin = { navController.navigate(Admin) },
+            onToggleDiagnostics = viewModel::setDiagnosticsOptOut,
            onSignOutClick = { showSignOutConfirm = true },
        )
    }
@@ -116,6 +118,7 @@ private fun SettingsList(
    onPickTheme: (ThemeMode) -> Unit,
    onNavToRequests: () -> Unit,
    onNavToAdmin: () -> Unit,
+    onToggleDiagnostics: (Boolean) -> Unit,
    onSignOutClick: () -> Unit,
 ) {
    Column(
@@ -148,6 +151,12 @@ private fun SettingsList(
        ProfileCard()
        PasswordCard()
        ListenBrainzCard()
+        if (state.diagnosticsEnabledByAdmin) {
+            DiagnosticsCard(
+                optOut = state.diagnosticsOptOut,
+                onToggle = onToggleDiagnostics,
+            )
+        }
        AppearanceCard(themeMode = themeMode, onPick = onPickTheme)
        StorageCard()
        AboutCard()
@@ -262,6 +271,46 @@ private fun AccountCard(username: String, isAdmin: Boolean, serverUrl: String) {
    }
 }

+// Shown only while an admin has enabled debug mode on this account. Lets
+// the user turn reporting OFF on this device (battery/privacy) without
+// touching the account flag. Checked = reporting on = NOT opted out.
+@Composable
+private fun DiagnosticsCard(optOut: Boolean, onToggle: (Boolean) -> Unit) {
+    ElevatedCard(modifier = Modifier.fillMaxWidth()) {
+        Column(
+            modifier = Modifier.padding(16.dp),
+            verticalArrangement = Arrangement.spacedBy(8.dp),
+        ) {
+            Text(
+                text = "Diagnostics",
+                style = MaterialTheme.typography.titleMedium,
+                color = MaterialTheme.colorScheme.onSurface,
+            )
+            Row(verticalAlignment = Alignment.CenterVertically) {
+                Column(modifier = Modifier.weight(1f)) {
+                    Text(
+                        text = "Send diagnostic reports",
+                        style = MaterialTheme.typography.bodyLarge,
+                        color = MaterialTheme.colorScheme.onSurface,
+                    )
+                    Text(
+                        text = "Your admin enabled debug mode to investigate an " +
+                            "issue. This device streams connectivity and playback " +
+                            "diagnostics. Turn off any time.",
+                        style = MaterialTheme.typography.bodySmall,
+                        color = MaterialTheme.colorScheme.onSurfaceVariant,
+                    )
+                }
+                Spacer(Modifier.size(12.dp))
+                Switch(
+                    checked = !optOut,
+                    onCheckedChange = { checked -> onToggle(!checked) },
+                )
+            }
+        }
+    }
+}
+
@OptIn(ExperimentalMaterial3Api::class)
@Composable
 private fun AppearanceCard(themeMode: ThemeMode, onPick: (ThemeMode) -> Unit) {
@@ -19,12 +19,15 @@ data class SettingsState(
    val isAdmin: Boolean = false,
    val isSigningOut: Boolean = false,
    val signedOut: Boolean = false,
+    // M9: account debug flag (admin-set) + this device's local opt-out.
+    val diagnosticsEnabledByAdmin: Boolean = false,
+    val diagnosticsOptOut: Boolean = false,
 )

@HiltViewModel
 class SettingsViewModel @Inject constructor(
    private val authController: AuthController,
-    authStore: AuthStore,
+    private val authStore: AuthStore,
 ) : ViewModel() {

    private val transient = MutableStateFlow(TransientState())
@@ -41,19 +44,27 @@ class SettingsViewModel @Inject constructor(
            combine(
                authStore.baseUrl,
                authController.currentUser,
+                authStore.diagnosticsOptOut,
                transient,
-            ) { url, user, t ->
+            ) { url, user, optOut, t ->
                SettingsState(
                    serverUrl = url,
                    username = user?.username.orEmpty(),
                    isAdmin = user?.isAdmin == true,
                    isSigningOut = t.isSigningOut,
                    signedOut = t.signedOut,
+                    diagnosticsEnabledByAdmin = user?.debugModeEnabled == true,
+                    diagnosticsOptOut = optOut,
                )
            }.collect { internal.value = it }
        }
    }

+    /** Per-device opt-out of diagnostics while the account flag is on. */
+    fun setDiagnosticsOptOut(optOut: Boolean) {
+        authStore.setDiagnosticsOptOut(optOut)
+    }
+
    fun signOut() {
        if (transient.value.isSigningOut) return
        viewModelScope.launch {
@@ -5,6 +5,7 @@ import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.fillMaxSize
 import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.layout.size
+import androidx.compose.foundation.lazy.LazyColumn
 import androidx.compose.material3.Button
 import androidx.compose.material3.ButtonDefaults
 import androidx.compose.material3.Icon
@@ -23,44 +24,63 @@ import com.fabledsword.minstrel.theme.LocalActionColors
 * Shared error-with-retry widget. Surfaces a brief message and a
 * primary action button. Per the design system, the button uses
 * `LocalActionColors.primary` (Moss) — NEVER the accent.
+ *
+ * Renders inside a single-item LazyColumn (same rationale as
+ * [EmptyState]) so the widget participates in nested-scroll dispatch
+ * under PullToRefreshBox — both the Retry button and a pull gesture
+ * can recover from the error state.
 */
@Composable
 fun ErrorRetry(
    message: String,
    onRetry: () -> Unit,
    modifier: Modifier = Modifier,
+    title: String? = null,
    retryLabel: String = "Retry",
 ) {
    val actionColors = LocalActionColors.current
-    Column(
-        modifier = modifier
-            .fillMaxSize()
-            .padding(32.dp),
-        verticalArrangement = Arrangement.Center,
-        horizontalAlignment = Alignment.CenterHorizontally,
-    ) {
-        Icon(
-            imageVector = Lucide.TriangleAlert,
-            contentDescription = null,
-            modifier = Modifier.size(48.dp),
-            tint = MaterialTheme.colorScheme.error,
-        )
-        Text(
-            text = message,
-            modifier = Modifier.padding(top = 16.dp),
-            style = MaterialTheme.typography.bodyMedium,
-            color = MaterialTheme.colorScheme.onSurface,
-            textAlign = TextAlign.Center,
-        )
-        Button(
-            onClick = onRetry,
-            modifier = Modifier.padding(top = 16.dp),
-            colors = ButtonDefaults.buttonColors(
-                containerColor = actionColors.primary,
-                contentColor = actionColors.onAction,
-            ),
-        ) {
-            Text(retryLabel)
+    LazyColumn(modifier = modifier.fillMaxSize()) {
+        item {
+            Column(
+                modifier = Modifier
+                    .fillParentMaxSize()
+                    .padding(32.dp),
+                verticalArrangement = Arrangement.Center,
+                horizontalAlignment = Alignment.CenterHorizontally,
+            ) {
+                Icon(
+                    imageVector = Lucide.TriangleAlert,
+                    contentDescription = null,
+                    modifier = Modifier.size(48.dp),
+                    tint = MaterialTheme.colorScheme.error,
+                )
+                if (title != null) {
+                    Text(
+                        text = title,
+                        modifier = Modifier.padding(top = 16.dp),
+                        style = MaterialTheme.typography.titleMedium,
+                        color = MaterialTheme.colorScheme.onSurface,
+                        textAlign = TextAlign.Center,
+                    )
+                }
+                Text(
+                    text = message,
+                    modifier = Modifier.padding(top = if (title != null) 8.dp else 16.dp),
+                    style = MaterialTheme.typography.bodyMedium,
+                    color = MaterialTheme.colorScheme.onSurface,
+                    textAlign = TextAlign.Center,
+                )
+                Button(
+                    onClick = onRetry,
+                    modifier = Modifier.padding(top = 16.dp),
+                    colors = ButtonDefaults.buttonColors(
+                        containerColor = actionColors.primary,
+                        contentColor = actionColors.onAction,
+                    ),
+                ) {
+                    Text(retryLabel)
+                }
+            }
        }
    }
 }
@@ -1,15 +1,25 @@
 package com.fabledsword.minstrel.shared.widgets

+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.fillMaxSize
 import androidx.compose.runtime.Composable
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.setValue
+import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.layout.ContentScale
 import coil3.compose.AsyncImage
+import coil3.compose.AsyncImagePainter
 import com.fabledsword.minstrel.shared.resolveServerUrl

 /**
 * Renders a server-hosted image, resolving relative URLs centrally so
 * every cover surface loads consistently. Shows [fallback] when the URL
- * is blank or unresolvable.
+ * is blank/unresolvable, while the image is still loading, and when the
+ * load fails — so a tile is never left blank (e.g. art not yet backfilled,
+ * which the "You might like" row hits often).
 */
@Composable
 fun ServerImage(
@@ -22,12 +32,26 @@ fun ServerImage(
    val resolved = resolveServerUrl(url)
    if (resolved == null) {
        fallback()
-    } else {
+        return
+    }
+    // Track Coil's load state so the fallback doubles as a placeholder
+    // (loading) and an error state (404 / unreachable) — not just a
+    // null-URL guard, which left present-but-failing URLs blank.
+    var state by remember(resolved) {
+        mutableStateOf<AsyncImagePainter.State>(AsyncImagePainter.State.Empty)
+    }
+    Box(modifier = modifier, contentAlignment = Alignment.Center) {
        AsyncImage(
            model = resolved,
            contentDescription = contentDescription,
-            modifier = modifier,
+            modifier = Modifier.fillMaxSize(),
            contentScale = contentScale,
+            onState = { state = it },
        )
+        if (state is AsyncImagePainter.State.Loading ||
+            state is AsyncImagePainter.State.Error
+        ) {
+            fallback()
+        }
    }
 }
@@ -11,6 +11,7 @@ import com.fabledsword.minstrel.testutil.MainDispatcherExtension
 import io.mockk.every
 import io.mockk.mockk
 import kotlinx.coroutines.flow.MutableSharedFlow
+import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.flow
 import kotlinx.coroutines.flow.flowOf
 import kotlinx.coroutines.test.runTest
@@ -21,6 +22,13 @@ import kotlin.test.assertEquals
@ExtendWith(MainDispatcherExtension::class)
 class LibraryViewModelTest {

+    // lastSyncError needs a real StateFlow: the VM combines it into uiState,
+    // and a relaxed-mock flow never emits, so the combine would never fire.
+    private fun syncControllerMock(): SyncController =
+        mockk<SyncController>(relaxed = true) {
+            every { lastSyncError } returns MutableStateFlow(null)
+        }
+
    @Test
    fun `initial state is Loading before any DAO emission`() = runTest {
        val repo = mockk<LibraryRepository>()
@@ -29,7 +37,7 @@ class LibraryViewModelTest {

        val vm = LibraryViewModel(
            repo,
-            mockk<SyncController>(relaxed = true),
+            syncControllerMock(),
            mockk<PlayerController>(relaxed = true),
        )

@@ -51,7 +59,7 @@ class LibraryViewModelTest {

        val vm = LibraryViewModel(
            repo,
-            mockk<SyncController>(relaxed = true),
+            syncControllerMock(),
            mockk<PlayerController>(relaxed = true),
        )

@@ -71,7 +79,7 @@ class LibraryViewModelTest {

        val vm = LibraryViewModel(
            repo,
-            mockk<SyncController>(relaxed = true),
+            syncControllerMock(),
            mockk<PlayerController>(relaxed = true),
        )

@@ -94,7 +102,7 @@ class LibraryViewModelTest {

        val vm = LibraryViewModel(
            repo,
-            mockk<SyncController>(relaxed = true),
+            syncControllerMock(),
            mockk<PlayerController>(relaxed = true),
        )

@@ -6,17 +6,27 @@ in-app update flow (#397).

 ## Production

-CI populates this directory on tag releases:
-1. `flutter.yml` builds `app-release.apk` and attaches it to the
-   Gitea release as `minstrel-<TAG>.apk`.
-2. `release.yml` waits for that asset to appear, downloads it into
-   this directory as `minstrel.apk`, writes the tag string to
-   `minstrel.apk.version`, and `docker buildx build` includes both
-   via `COPY client/ /app/client/`.
+CI populates this directory in `release.yml` (no Flutter — the client is
+native Android, built by the `android-release` job):
+
+- **Tag release (`v*`):** the `android-release` job builds + signs the
+  APK, uploads it as a workflow artifact, and attaches it to the Gitea
+  release as `minstrel-<TAG>.apk`. The `image-release` job
+  (`needs: android-release`) downloads that artifact into this directory
+  as `minstrel.apk` and writes the computed versionName to
+  `minstrel.apk.version`.
+- **Main push (non-tag `:latest` / `:main`):** no APK is built, but the
+  image still moves `:latest`, so `image-release` pulls the most-recent
+  release's signed APK from the Gitea API and reconstructs its exact
+  versionName — keeping the in-app update channel alive on `:latest`
+  instead of stripping it until the next tag.
+
+Either way, `docker buildx build` bakes both files into the image via
+`COPY client/ /app/client/`.

 ## Development

-Empty directory works fine — the endpoints return 404 and the Flutter
+Empty directory works fine — the endpoints return 404 and the Android
 update banner stays hidden ("no update channel" graceful degradation).

 To smoke-test the update flow locally, drop a real APK + a version
@@ -242,7 +242,12 @@ func run() error {
 	// active user's daily build at 03:00 in their stored timezone.
 	// Replaces the 24h-anchored cron loop (removed in the next commit
 	// of this arc).
-	playlistScheduler, err := playlists.NewScheduler(pool, logger.With("component", "playlist_scheduler"), cfg.Storage.DataDir)
+	playlistScheduler, err := playlists.NewScheduler(
+		pool,
+		logger.With("component", "playlist_scheduler"),
+		cfg.Storage.DataDir,
+		bus,
+	)
 	if err != nil {
 		return fmt.Errorf("init playlist scheduler: %w", err)
 	}
@@ -26,8 +26,13 @@ library:
  # Filesystem roots to scan for music. Each path is walked recursively.
  # Env: MINSTREL_LIBRARY_SCAN_PATHS (colon-separated, PATH-style)
  scan_paths: []
-  # Kick off a scan on server startup. Env: MINSTREL_LIBRARY_SCAN_ON_STARTUP
-  scan_on_startup: false
+  # Kick off a scan on server startup. On by default so a fresh install
+  # populates its library on first boot with no manual step. Scans are
+  # incremental (unchanged files are skipped by mtime), so the cost on
+  # every later restart is just a directory walk, not a full re-index.
+  # Set false if you'd rather scan only on a schedule / via the admin UI.
+  # Env: MINSTREL_LIBRARY_SCAN_ON_STARTUP
+  scan_on_startup: true

 # Per-instance branding. Operators can rename their instance ("Family
 # Jukebox", "Office Music", etc.) and override the OG share-preview
@@ -0,0 +1,19 @@
+# README screenshots
+
+Drop the files below into this directory with these **exact names** — the
+root `README.md` already references them, so no Markdown editing is needed.
+Export as PNG. Capture while logged in as admin and *after* the first
+library scan so nothing looks empty; keep the same browser width and theme
+across all shots for a consistent look.
+
+| Filename | Route | What to capture |
+|---|---|---|
+| `home.png` | `/` | The home page with a populated library (system playlists / recently added) |
+| `register.png` | `/register` | The account-creation form on a fresh instance |
+| `library-scan.png` | `/admin` | The library scan running in stages (grab it mid-scan so stage tallies show) |
+| `integrations.png` | `/admin/integrations` | The ListenBrainz + Lidarr integration cards |
+| `android-download.png` | `/settings` | The "Install the Android app" download card |
+| `invite-users.png` | `/admin/users` | The invite-token generation / users list |
+
+Tip: to control display width in the README, you can swap the Markdown
+`![alt](path)` for an HTML tag, e.g. `<img src="docs/screenshots/home.png" width="800" alt="...">`.
@@ -22,6 +22,7 @@ type adminUserView struct {
 	DisplayName         *string `json:"display_name"`
 	IsAdmin             bool    `json:"is_admin"`
 	AutoApproveRequests bool    `json:"auto_approve_requests"`
+	DebugModeEnabled    bool    `json:"debug_mode_enabled"`
 	CreatedAt           string  `json:"created_at"`
 }

@@ -44,6 +45,7 @@ func (h *handlers) handleAdminListUsers(w http.ResponseWriter, r *http.Request)
 			DisplayName:         row.DisplayName,
 			IsAdmin:             row.IsAdmin,
 			AutoApproveRequests: row.AutoApproveRequests,
+			DebugModeEnabled:    row.DebugModeEnabled,
 			CreatedAt:           row.CreatedAt.Time.UTC().Format(time.RFC3339),
 		}
 		out = append(out, v)
@@ -120,6 +122,7 @@ func (h *handlers) handleUpdateUserAdmin(w http.ResponseWriter, r *http.Request)
 		DisplayName:         updated.DisplayName,
 		IsAdmin:             updated.IsAdmin,
 		AutoApproveRequests: updated.AutoApproveRequests,
+		DebugModeEnabled:    updated.DebugModeEnabled,
 		CreatedAt:           updated.CreatedAt.Time.UTC().Format(time.RFC3339),
 	})
 }
@@ -189,6 +192,7 @@ func (h *handlers) handleAdminCreateUser(w http.ResponseWriter, r *http.Request)
 		DisplayName:         user.DisplayName,
 		IsAdmin:             user.IsAdmin,
 		AutoApproveRequests: user.AutoApproveRequests,
+		DebugModeEnabled:    user.DebugModeEnabled,
 		CreatedAt:           user.CreatedAt.Time.UTC().Format(time.RFC3339),
 	})
 }
@@ -329,6 +333,7 @@ func (h *handlers) handleAdminAutoApproveToggle(w http.ResponseWriter, r *http.R
 		DisplayName:         updated.DisplayName,
 		IsAdmin:             updated.IsAdmin,
 		AutoApproveRequests: updated.AutoApproveRequests,
+		DebugModeEnabled:    updated.DebugModeEnabled,
 		CreatedAt:           updated.CreatedAt.Time.UTC().Format(time.RFC3339),
 	})
 }
@@ -135,6 +135,12 @@ func Mount(r chi.Router, pool *pgxpool.Pool, logger *slog.Logger, events *playev
 			// load failures). Admin-only inbox; any user can report.
 			authed.Post("/playback-errors", h.handleReportPlaybackError)

+			// Device diagnostics ingest (M9). Any signed-in user can
+			// POST a batch, but events are only stored when the
+			// account's debug_mode_enabled flag is on (handler no-ops
+			// otherwise). Admin views live under /admin/diagnostics.
+			authed.Post("/diagnostics", h.handleReportDiagnostics)
+
 			// Self-hosted in-app update channel (#397). Auth-gated to
 			// prevent anonymous bandwidth abuse on the APK stream;
 			// /apk additionally per-user rate-limited.
@@ -181,6 +187,11 @@ func Mount(r chi.Router, pool *pgxpool.Pool, logger *slog.Logger, events *playev
 				admin.Delete("/users/{id}", h.handleAdminDeleteUser)
 				admin.Post("/users/{id}/reset-password", h.handleAdminResetPassword)
 				admin.Put("/users/{id}/auto-approve", h.handleAdminAutoApproveToggle)
+				admin.Put("/users/{id}/debug-mode", h.handleAdminDebugModeToggle)
+
+				// Device diagnostics timeline + device overview (M9).
+				admin.Get("/diagnostics", h.handleListAdminDiagnostics)
+				admin.Get("/diagnostics/devices", h.handleListAdminDiagnosticDevices)

 				admin.Get("/cover-sources", h.handleListCoverSources)
 				admin.Patch("/cover-sources/{provider_id}", h.handleUpdateCoverSource)
@@ -0,0 +1,346 @@
+package api
+
+import (
+	"encoding/json"
+	"net/http"
+	"strconv"
+	"strings"
+	"time"
+
+	"github.com/jackc/pgx/v5"
+	"github.com/jackc/pgx/v5/pgtype"
+
+	"git.fabledsword.com/bvandeusen/minstrel/internal/apierror"
+	"git.fabledsword.com/bvandeusen/minstrel/internal/db/dbq"
+)
+
+// validDiagnosticKinds is the COARSE category whitelist. Mirrors the
+// CHECK constraint in migration 0036 — keep both in sync (per the
+// enum-CHECK-whitelist rule). The finer event discriminator + all
+// event-specific fields live inside each event's payload, so new event
+// variants do NOT require a new category here.
+var validDiagnosticKinds = map[string]struct{}{
+	"connectivity": {},
+	"upnp_sync":    {}, // genuinely UPnP/Sonos-specific (drops, resync)
+	"playback":     {}, // route + player-state, any output (phone/BT/UPnP)
+	"power":        {},
+	"lifecycle":    {},
+	"heartbeat":    {},
+	"http":         {},
+}
+
+// maxDiagnosticBatch caps a single ingest call. The client buffers and
+// flushes in batches of ~100; 500 leaves generous headroom while
+// bounding a misbehaving client's per-request work.
+const maxDiagnosticBatch = 500
+
+// Diagnostics list paging. Larger than the generic parsePaging caps
+// because the admin timeline is meant to be exported as a slice and
+// handed off for analysis — a heartbeat-dense window has many rows.
+const (
+	defaultDiagnosticPageSize = 500
+	maxDiagnosticPageSize     = 5000
+)
+
+// diagnosticEventIn is one event in a POST /api/diagnostics batch.
+// OccurredAt is the client device clock as epoch milliseconds (may be
+// skewed — the server also stamps received_at). Payload is opaque JSON
+// carrying the event's sub-type + fields.
+type diagnosticEventIn struct {
+	Kind       string          `json:"kind"`
+	OccurredAt int64           `json:"occurred_at"`
+	Payload    json.RawMessage `json:"payload"`
+}
+
+// reportDiagnosticsRequest is the body of POST /api/diagnostics — one
+// batch from one device.
+type reportDiagnosticsRequest struct {
+	ClientID   string              `json:"client_id"`
+	AppVersion *string             `json:"app_version,omitempty"`
+	OsVersion  *string             `json:"os_version,omitempty"`
+	Events     []diagnosticEventIn `json:"events"`
+}
+
+// handleReportDiagnostics implements POST /api/diagnostics. Any signed-in
+// user can call it, but events are only stored when the account's
+// debug_mode_enabled flag is on; otherwise the call is a 204 no-op so the
+// client can safely drop the batch (it gates locally on /api/me, this is
+// the race-safe backstop for "admin just disabled debug").
+func (h *handlers) handleReportDiagnostics(w http.ResponseWriter, r *http.Request) {
+	user, ok := requireUser(w, r)
+	if !ok {
+		return
+	}
+	if !user.DebugModeEnabled {
+		w.WriteHeader(http.StatusNoContent)
+		return
+	}
+	var req reportDiagnosticsRequest
+	if !decodeBody(w, r, &req) {
+		return
+	}
+	if strings.TrimSpace(req.ClientID) == "" {
+		writeErr(w, apierror.BadRequest("bad_request", "client_id required"))
+		return
+	}
+	if len(req.Events) == 0 {
+		writeJSON(w, http.StatusAccepted, map[string]int{"accepted": 0})
+		return
+	}
+	if len(req.Events) > maxDiagnosticBatch {
+		writeErr(w, apierror.BadRequest("batch_too_large", "too many events in one batch"))
+		return
+	}
+	for i := range req.Events {
+		if _, valid := validDiagnosticKinds[req.Events[i].Kind]; !valid {
+			writeErr(w, apierror.BadRequest("invalid_kind", "unknown diagnostic kind"))
+			return
+		}
+	}
+
+	err := pgx.BeginFunc(r.Context(), h.pool, func(tx pgx.Tx) error {
+		q := dbq.New(tx)
+		for i := range req.Events {
+			ev := req.Events[i]
+			payload := ev.Payload
+			if len(payload) == 0 {
+				payload = json.RawMessage("{}")
+			}
+			if _, err := q.InsertDiagnosticEvent(r.Context(), dbq.InsertDiagnosticEventParams{
+				UserID:     user.ID,
+				ClientID:   req.ClientID,
+				AppVersion: req.AppVersion,
+				OsVersion:  req.OsVersion,
+				Kind:       ev.Kind,
+				Payload:    payload,
+				OccurredAt: pgtype.Timestamptz{Time: time.UnixMilli(ev.OccurredAt).UTC(), Valid: true},
+			}); err != nil {
+				return err
+			}
+		}
+		return nil
+	})
+	if err != nil {
+		writeErrWithLog(w, h.logger, "diagnostics: insert batch failed", apierror.Internal(err))
+		return
+	}
+	writeJSON(w, http.StatusAccepted, map[string]int{"accepted": len(req.Events)})
+}
+
+// adminDiagnosticView is one row in the admin timeline response. Payload
+// is passed through verbatim as raw JSON so the SPA can render / export
+// the structured event without the server re-shaping it.
+type adminDiagnosticView struct {
+	ID         string          `json:"id"`
+	UserID     string          `json:"user_id"`
+	Username   string          `json:"username"`
+	ClientID   string          `json:"client_id"`
+	AppVersion *string         `json:"app_version,omitempty"`
+	OsVersion  *string         `json:"os_version,omitempty"`
+	Kind       string          `json:"kind"`
+	Payload    json.RawMessage `json:"payload"`
+	OccurredAt string          `json:"occurred_at"`
+	ReceivedAt string          `json:"received_at"`
+}
+
+// handleListAdminDiagnostics implements GET /api/admin/diagnostics with
+// optional filters user_id, client_id, kind, from, to (RFC3339 or epoch
+// millis) plus limit/offset. Newest-first; the SPA reverses for a
+// chronological timeline + export.
+func (h *handlers) handleListAdminDiagnostics(w http.ResponseWriter, r *http.Request) {
+	q := r.URL.Query()
+	params, ok := h.buildDiagnosticsFilter(w, q)
+	if !ok {
+		return
+	}
+	rows, err := dbq.New(h.pool).ListAdminDiagnostics(r.Context(), params)
+	if err != nil {
+		writeErrWithLog(w, h.logger, "admin: list diagnostics failed", apierror.Internal(err))
+		return
+	}
+	out := make([]adminDiagnosticView, 0, len(rows))
+	for _, row := range rows {
+		out = append(out, adminDiagnosticView{
+			ID:         uuidToString(row.ID),
+			UserID:     uuidToString(row.UserID),
+			Username:   row.Username,
+			ClientID:   row.ClientID,
+			AppVersion: row.AppVersion,
+			OsVersion:  row.OsVersion,
+			Kind:       row.Kind,
+			Payload:    json.RawMessage(row.Payload),
+			OccurredAt: formatTimestamp(row.OccurredAt),
+			ReceivedAt: formatTimestamp(row.ReceivedAt),
+		})
+	}
+	writeJSON(w, http.StatusOK, out)
+}
+
+// buildDiagnosticsFilter parses the query string into a query param
+// struct, writing a 400 and returning ok=false on a malformed time.
+func (h *handlers) buildDiagnosticsFilter(
+	w http.ResponseWriter, q map[string][]string,
+) (dbq.ListAdminDiagnosticsParams, bool) {
+	get := func(k string) string {
+		if v, present := q[k]; present && len(v) > 0 {
+			return v[0]
+		}
+		return ""
+	}
+	limit, offset, err := parseDiagPaging(get("limit"), get("offset"))
+	if err != nil {
+		writeErr(w, apierror.BadRequest("bad_request", "invalid limit or offset"))
+		return dbq.ListAdminDiagnosticsParams{}, false
+	}
+	from, okFrom := parseDiagTime(get("from"))
+	to, okTo := parseDiagTime(get("to"))
+	if !okFrom || !okTo {
+		writeErr(w, apierror.BadRequest("bad_request", "invalid from/to timestamp"))
+		return dbq.ListAdminDiagnosticsParams{}, false
+	}
+	params := dbq.ListAdminDiagnosticsParams{
+		ClientID: optionalQuery(get("client_id")),
+		Kind:     optionalQuery(get("kind")),
+		FromTs:   from,
+		ToTs:     to,
+		Off:      int32(offset),
+		Lim:      int32(limit),
+	}
+	if uid, valid := parseUUID(get("user_id")); valid {
+		params.UserID = uid
+	}
+	return params, true
+}
+
+// adminDiagnosticDeviceView is one device in the "who is reporting"
+// overview / device filter dropdown.
+type adminDiagnosticDeviceView struct {
+	ClientID   string `json:"client_id"`
+	UserID     string `json:"user_id"`
+	Username   string `json:"username"`
+	AppVersion string `json:"app_version"`
+	OsVersion  string `json:"os_version"`
+	LastSeen   string `json:"last_seen"`
+	EventCount int64  `json:"event_count"`
+}
+
+// handleListAdminDiagnosticDevices implements GET
+// /api/admin/diagnostics/devices?user_id=. Lists distinct reporting
+// devices so the admin UI can populate its device filter.
+func (h *handlers) handleListAdminDiagnosticDevices(w http.ResponseWriter, r *http.Request) {
+	var userID pgtype.UUID
+	if uid, valid := parseUUID(r.URL.Query().Get("user_id")); valid {
+		userID = uid
+	}
+	rows, err := dbq.New(h.pool).ListDiagnosticDevices(r.Context(), userID)
+	if err != nil {
+		writeErrWithLog(w, h.logger, "admin: list diagnostic devices failed", apierror.Internal(err))
+		return
+	}
+	out := make([]adminDiagnosticDeviceView, 0, len(rows))
+	for _, row := range rows {
+		out = append(out, adminDiagnosticDeviceView{
+			ClientID:   row.ClientID,
+			UserID:     uuidToString(row.UserID),
+			Username:   row.Username,
+			AppVersion: row.AppVersion,
+			OsVersion:  row.OsVersion,
+			LastSeen:   formatTimestamp(row.LastSeen),
+			EventCount: row.EventCount,
+		})
+	}
+	writeJSON(w, http.StatusOK, out)
+}
+
+// adminDebugModeReq is the body of PUT /api/admin/users/{id}/debug-mode.
+type adminDebugModeReq struct {
+	Enabled bool `json:"enabled"`
+}
+
+// handleAdminDebugModeToggle implements PUT
+// /api/admin/users/{id}/debug-mode — flip an account's diagnostics
+// opt-in remotely while a bug is live. Echoes the updated user.
+func (h *handlers) handleAdminDebugModeToggle(w http.ResponseWriter, r *http.Request) {
+	targetID, ok := requireURLUUID(w, r, "id")
+	if !ok {
+		return
+	}
+	var req adminDebugModeReq
+	if !decodeBody(w, r, &req) {
+		return
+	}
+	updated, err := dbq.New(h.pool).SetDebugMode(r.Context(), dbq.SetDebugModeParams{
+		ID:               targetID,
+		DebugModeEnabled: req.Enabled,
+	})
+	if err != nil {
+		writeErrWithLog(w, h.logger, "admin: set debug mode failed", apierror.Internal(err))
+		return
+	}
+	h.logger.Info("admin: debug mode toggled",
+		"target_user", uuidToString(targetID), "enabled", req.Enabled)
+	writeJSON(w, http.StatusOK, adminUserView{
+		ID:                  uuidToString(updated.ID),
+		Username:            updated.Username,
+		DisplayName:         updated.DisplayName,
+		IsAdmin:             updated.IsAdmin,
+		AutoApproveRequests: updated.AutoApproveRequests,
+		DebugModeEnabled:    updated.DebugModeEnabled,
+		CreatedAt:           updated.CreatedAt.Time.UTC().Format(time.RFC3339),
+	})
+}
+
+// parseDiagPaging reads limit/offset with diagnostics-specific caps.
+// Blank → defaults; out-of-range clamps; non-numeric → error.
+func parseDiagPaging(rawLimit, rawOffset string) (limit, offset int, err error) {
+	limit = defaultDiagnosticPageSize
+	if s := strings.TrimSpace(rawLimit); s != "" {
+		n, perr := strconv.Atoi(s)
+		if perr != nil {
+			return 0, 0, perr
+		}
+		if n < 1 {
+			n = 1
+		}
+		if n > maxDiagnosticPageSize {
+			n = maxDiagnosticPageSize
+		}
+		limit = n
+	}
+	if s := strings.TrimSpace(rawOffset); s != "" {
+		n, perr := strconv.Atoi(s)
+		if perr != nil {
+			return 0, 0, perr
+		}
+		if n > 0 {
+			offset = n
+		}
+	}
+	return limit, offset, nil
+}
+
+// optionalQuery returns nil for an absent/blank query value so the sqlc
+// NULL-or-equals filter treats it as "no filter."
+func optionalQuery(raw string) *string {
+	raw = strings.TrimSpace(raw)
+	if raw == "" {
+		return nil
+	}
+	return &raw
+}
+
+// parseDiagTime accepts RFC3339 or epoch-millis. Empty = absent (NULL
+// filter, ok=true). Returns ok=false only on a non-empty unparseable value.
+func parseDiagTime(raw string) (pgtype.Timestamptz, bool) {
+	raw = strings.TrimSpace(raw)
+	if raw == "" {
+		return pgtype.Timestamptz{}, true
+	}
+	if t, err := time.Parse(time.RFC3339, raw); err == nil {
+		return pgtype.Timestamptz{Time: t.UTC(), Valid: true}, true
+	}
+	if ms, err := strconv.ParseInt(raw, 10, 64); err == nil {
+		return pgtype.Timestamptz{Time: time.UnixMilli(ms).UTC(), Valid: true}, true
+	}
+	return pgtype.Timestamptz{}, false
+}
@@ -88,6 +88,21 @@ func (h *handlers) publishPlaylistEvent(kind string, ownerID, playlistID pgtype.
 	})
 }

+// publishSystemRebuilt notifies the owner's clients that their system
+// playlists (and You-might-like rows) were regenerated, so they invalidate
+// the home / system-playlist providers and a stale active queue can re-pull.
+// Mirrors the daily scheduler's event; fired here from the manual refresh.
+func (h *handlers) publishSystemRebuilt(userID pgtype.UUID) {
+	if h.eventbus == nil {
+		return
+	}
+	h.eventbus.Publish(eventbus.Event{
+		Kind:   "playlist.system_rebuilt",
+		UserID: uuidToString(userID),
+		Data:   map[string]any{},
+	})
+}
+
 // publishRequestStatusChanged broadcasts a Lidarr request status flip to
 // the request's original requester so their /requests page reflects the
 // new state without manual refresh. Admin actors (approve / reject) still
@@ -35,6 +35,10 @@ type meProfileResp struct {
 	DisplayName *string `json:"display_name"`
 	Email       *string `json:"email"`
 	IsAdmin     bool    `json:"is_admin"`
+	// DebugModeEnabled is the account's diagnostics opt-in. The client
+	// reads it here to decide whether to run the on-device diagnostics
+	// reporter (M9). Admin-set; the client also has a local OFF switch.
+	DebugModeEnabled bool `json:"debug_mode_enabled"`
 }

 func (h *handlers) handleUpdateMyProfile(w http.ResponseWriter, r *http.Request) {
@@ -120,10 +124,11 @@ func (h *handlers) handleUpdateMyProfile(w http.ResponseWriter, r *http.Request)

 func profileViewFromUser(u dbq.User) meProfileResp {
 	return meProfileResp{
-		ID:          uuidToString(u.ID),
-		Username:    u.Username,
-		DisplayName: u.DisplayName,
-		Email:       u.Email,
-		IsAdmin:     u.IsAdmin,
+		ID:               uuidToString(u.ID),
+		Username:         u.Username,
+		DisplayName:      u.DisplayName,
+		Email:            u.Email,
+		IsAdmin:          u.IsAdmin,
+		DebugModeEnabled: u.DebugModeEnabled,
 	}
 }
@@ -73,6 +73,8 @@ func (h *handlers) handleSystemPlaylistRefresh(w http.ResponseWriter, r *http.Re
 		writeErr(w, apierror.InternalMsg("build failed", err))
 		return
 	}
+	// #968: announce the rebuild so the user's other clients refresh.
+	h.publishSystemRebuilt(user.ID)
 	q := dbq.New(h.pool)
 	v := kind
 	pl, err := q.GetSystemPlaylistByVariantForUser(r.Context(),
@@ -135,6 +135,11 @@ func Default() Config {
 			RadioSizeMax:        200,
 		},
 		Library: LibraryConfig{
+			// On by default so a fresh install populates its library on
+			// first boot without the operator hunting for a "scan now"
+			// button. Scans are incremental (unchanged files skipped by
+			// mtime), so every later restart is just a cheap directory walk.
+			ScanOnStartup:     true,
 			CoverArtFromMBCAA: true,
 		},
 	}
@@ -97,7 +97,8 @@ func TestEnvOverrides(t *testing.T) {
 func TestLibraryEnvOverrides(t *testing.T) {
 	stubStreamSecret(t)
 	t.Setenv("MINSTREL_LIBRARY_SCAN_PATHS", "/music:/other::/third")
-	t.Setenv("MINSTREL_LIBRARY_SCAN_ON_STARTUP", "true")
+	// Default is true; set false so the override path is actually exercised.
+	t.Setenv("MINSTREL_LIBRARY_SCAN_ON_STARTUP", "false")

 	cfg, err := Load("")
 	if err != nil {
@@ -112,8 +113,8 @@ func TestLibraryEnvOverrides(t *testing.T) {
 			t.Errorf("scan_paths[%d] = %q, want %q", i, cfg.Library.ScanPaths[i], p)
 		}
 	}
-	if !cfg.Library.ScanOnStartup {
-		t.Error("scan_on_startup = false, want true")
+	if cfg.Library.ScanOnStartup {
+		t.Error("scan_on_startup = true, want false (env override of the true default)")
 	}
 }

@@ -0,0 +1,221 @@
+// Code generated by sqlc. DO NOT EDIT.
+// versions:
+//   sqlc v1.31.1
+// source: diagnostics.sql
+
+package dbq
+
+import (
+	"context"
+
+	"github.com/jackc/pgx/v5/pgtype"
+)
+
+const gcPruneDiagnostics = `-- name: GcPruneDiagnostics :execrows
+DELETE FROM diagnostic_events WHERE received_at < now() - INTERVAL '30 days'
+`
+
+// Retention sweep for the gc worker. Deletes diagnostic_events older
+// than 30 days by server clock (received_at) so a skewed client clock
+// can't keep rows alive. Matches the other gc lifecycle sweeps'
+// hardcoded-threshold style; diagnostics are debug telemetry, not user
+// data, and 30 days is ample to investigate a live incident after the
+// fact. Returns the affected row count for the sweep log line.
+func (q *Queries) GcPruneDiagnostics(ctx context.Context) (int64, error) {
+	result, err := q.db.Exec(ctx, gcPruneDiagnostics)
+	if err != nil {
+		return 0, err
+	}
+	return result.RowsAffected(), nil
+}
+
+const insertDiagnosticEvent = `-- name: InsertDiagnosticEvent :one
+INSERT INTO diagnostic_events (
+    user_id, client_id, app_version, os_version, kind, payload, occurred_at
+)
+VALUES ($1, $2, $3, $4, $5, $6, $7)
+RETURNING id, received_at
+`
+
+type InsertDiagnosticEventParams struct {
+	UserID     pgtype.UUID
+	ClientID   string
+	AppVersion *string
+	OsVersion  *string
+	Kind       string
+	Payload    []byte
+	OccurredAt pgtype.Timestamptz
+}
+
+type InsertDiagnosticEventRow struct {
+	ID         pgtype.UUID
+	ReceivedAt pgtype.Timestamptz
+}
+
+// Records one client-reported diagnostic event. The writer validates the
+// `kind` category against its whitelist before this runs; the CHECK
+// constraint is the belt-and-braces guard. payload carries the finer
+// event discriminator + all event-specific fields. Returns received_at
+// so the caller can confirm ingest.
+func (q *Queries) InsertDiagnosticEvent(ctx context.Context, arg InsertDiagnosticEventParams) (InsertDiagnosticEventRow, error) {
+	row := q.db.QueryRow(ctx, insertDiagnosticEvent,
+		arg.UserID,
+		arg.ClientID,
+		arg.AppVersion,
+		arg.OsVersion,
+		arg.Kind,
+		arg.Payload,
+		arg.OccurredAt,
+	)
+	var i InsertDiagnosticEventRow
+	err := row.Scan(&i.ID, &i.ReceivedAt)
+	return i, err
+}
+
+const listAdminDiagnostics = `-- name: ListAdminDiagnostics :many
+SELECT
+    de.id          AS id,
+    de.user_id     AS user_id,
+    u.username     AS username,
+    de.client_id   AS client_id,
+    de.app_version AS app_version,
+    de.os_version  AS os_version,
+    de.kind        AS kind,
+    de.payload     AS payload,
+    de.occurred_at AS occurred_at,
+    de.received_at AS received_at
+FROM diagnostic_events de
+JOIN users u ON u.id = de.user_id
+WHERE ($1::uuid   IS NULL OR de.user_id   = $1::uuid)
+  AND ($2::text IS NULL OR de.client_id = $2::text)
+  AND ($3::text      IS NULL OR de.kind      = $3::text)
+  AND ($4::timestamptz IS NULL
+       OR de.occurred_at >= $4::timestamptz)
+  AND ($5::timestamptz IS NULL
+       OR de.occurred_at <= $5::timestamptz)
+ORDER BY de.occurred_at DESC
+LIMIT $7::int OFFSET $6::int
+`
+
+type ListAdminDiagnosticsParams struct {
+	UserID   pgtype.UUID
+	ClientID *string
+	Kind     *string
+	FromTs   pgtype.Timestamptz
+	ToTs     pgtype.Timestamptz
+	Off      int32
+	Lim      int32
+}
+
+type ListAdminDiagnosticsRow struct {
+	ID         pgtype.UUID
+	UserID     pgtype.UUID
+	Username   string
+	ClientID   string
+	AppVersion *string
+	OsVersion  *string
+	Kind       string
+	Payload    []byte
+	OccurredAt pgtype.Timestamptz
+	ReceivedAt pgtype.Timestamptz
+}
+
+// Admin timeline query. All filters are optional (NULL = no filter):
+// account (user_id), device (client_id), category (kind), and the
+// occurred_at window (from_ts/to_ts). Newest-first; the SPA reverses for
+// a chronological timeline / export. Joined with users for the username
+// so the view renders without a second round-trip.
+func (q *Queries) ListAdminDiagnostics(ctx context.Context, arg ListAdminDiagnosticsParams) ([]ListAdminDiagnosticsRow, error) {
+	rows, err := q.db.Query(ctx, listAdminDiagnostics,
+		arg.UserID,
+		arg.ClientID,
+		arg.Kind,
+		arg.FromTs,
+		arg.ToTs,
+		arg.Off,
+		arg.Lim,
+	)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+	var items []ListAdminDiagnosticsRow
+	for rows.Next() {
+		var i ListAdminDiagnosticsRow
+		if err := rows.Scan(
+			&i.ID,
+			&i.UserID,
+			&i.Username,
+			&i.ClientID,
+			&i.AppVersion,
+			&i.OsVersion,
+			&i.Kind,
+			&i.Payload,
+			&i.OccurredAt,
+			&i.ReceivedAt,
+		); err != nil {
+			return nil, err
+		}
+		items = append(items, i)
+	}
+	if err := rows.Err(); err != nil {
+		return nil, err
+	}
+	return items, nil
+}
+
+const listDiagnosticDevices = `-- name: ListDiagnosticDevices :many
+SELECT
+    de.client_id            AS client_id,
+    de.user_id              AS user_id,
+    u.username              AS username,
+    max(de.app_version)::text        AS app_version,
+    max(de.os_version)::text         AS os_version,
+    max(de.occurred_at)::timestamptz AS last_seen,
+    count(*)                         AS event_count
+FROM diagnostic_events de
+JOIN users u ON u.id = de.user_id
+WHERE ($1::uuid IS NULL OR de.user_id = $1::uuid)
+GROUP BY de.client_id, de.user_id, u.username
+ORDER BY last_seen DESC
+`
+
+type ListDiagnosticDevicesRow struct {
+	ClientID   string
+	UserID     pgtype.UUID
+	Username   string
+	AppVersion string
+	OsVersion  string
+	LastSeen   pgtype.Timestamptz
+	EventCount int64
+}
+
+// Distinct devices that have reported, for the admin device filter +
+// "who is currently reporting" overview. Optionally scoped to one account.
+func (q *Queries) ListDiagnosticDevices(ctx context.Context, userID pgtype.UUID) ([]ListDiagnosticDevicesRow, error) {
+	rows, err := q.db.Query(ctx, listDiagnosticDevices, userID)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+	var items []ListDiagnosticDevicesRow
+	for rows.Next() {
+		var i ListDiagnosticDevicesRow
+		if err := rows.Scan(
+			&i.ClientID,
+			&i.UserID,
+			&i.Username,
+			&i.AppVersion,
+			&i.OsVersion,
+			&i.LastSeen,
+			&i.EventCount,
+		); err != nil {
+			return nil, err
+		}
+		items = append(items, i)
+	}
+	if err := rows.Err(); err != nil {
+		return nil, err
+	}
+	return items, nil
+}
@@ -265,6 +265,18 @@ type CoverArtSourcesMetum struct {
 	LastRegisteredProvidersHash string
 }

+type DiagnosticEvent struct {
+	ID         pgtype.UUID
+	UserID     pgtype.UUID
+	ClientID   string
+	AppVersion *string
+	OsVersion  *string
+	Kind       string
+	Payload    []byte
+	OccurredAt pgtype.Timestamptz
+	ReceivedAt pgtype.Timestamptz
+}
+
 type GeneralLike struct {
 	UserID  pgtype.UUID
 	TrackID pgtype.UUID
@@ -552,6 +564,7 @@ type User struct {
 	Email               *string
 	Timezone            string
 	TimezoneUpdatedAt   pgtype.Timestamptz
+	DebugModeEnabled    bool
 }

 type UserInvite struct {
@@ -54,7 +54,7 @@ func (q *Queries) CountUsers(ctx context.Context) (int64, error) {
 const createUser = `-- name: CreateUser :one
 INSERT INTO users (username, password_hash, api_token, is_admin, display_name)
 VALUES ($1, $2, $3, $4, $5)
-RETURNING id, username, password_hash, api_token, is_admin, created_at, subsonic_password, listenbrainz_token, listenbrainz_enabled, display_name, auto_approve_requests, email, timezone, timezone_updated_at
+RETURNING id, username, password_hash, api_token, is_admin, created_at, subsonic_password, listenbrainz_token, listenbrainz_enabled, display_name, auto_approve_requests, email, timezone, timezone_updated_at, debug_mode_enabled
 `

 type CreateUserParams struct {
@@ -89,6 +89,7 @@ func (q *Queries) CreateUser(ctx context.Context, arg CreateUserParams) (User, e
 		&i.Email,
 		&i.Timezone,
 		&i.TimezoneUpdatedAt,
+		&i.DebugModeEnabled,
 	)
 	return i, err
 }
@@ -96,7 +97,7 @@ func (q *Queries) CreateUser(ctx context.Context, arg CreateUserParams) (User, e
 const createUserAdmin = `-- name: CreateUserAdmin :one
 INSERT INTO users (username, password_hash, api_token, is_admin, display_name)
 VALUES ($1, $2, $3, $4, $5)
-RETURNING id, username, password_hash, api_token, is_admin, created_at, subsonic_password, listenbrainz_token, listenbrainz_enabled, display_name, auto_approve_requests, email, timezone, timezone_updated_at
+RETURNING id, username, password_hash, api_token, is_admin, created_at, subsonic_password, listenbrainz_token, listenbrainz_enabled, display_name, auto_approve_requests, email, timezone, timezone_updated_at, debug_mode_enabled
 `

 type CreateUserAdminParams struct {
@@ -134,6 +135,7 @@ func (q *Queries) CreateUserAdmin(ctx context.Context, arg CreateUserAdminParams
 		&i.Email,
 		&i.Timezone,
 		&i.TimezoneUpdatedAt,
+		&i.DebugModeEnabled,
 	)
 	return i, err
 }
@@ -145,7 +147,7 @@ VALUES (
    (SELECT NOT EXISTS (SELECT 1 FROM users)),
    $4
 )
-RETURNING id, username, password_hash, api_token, is_admin, created_at, subsonic_password, listenbrainz_token, listenbrainz_enabled, display_name, auto_approve_requests, email, timezone, timezone_updated_at
+RETURNING id, username, password_hash, api_token, is_admin, created_at, subsonic_password, listenbrainz_token, listenbrainz_enabled, display_name, auto_approve_requests, email, timezone, timezone_updated_at, debug_mode_enabled
 `

 type CreateUserFirstAdminRaceParams struct {
@@ -191,6 +193,7 @@ func (q *Queries) CreateUserFirstAdminRace(ctx context.Context, arg CreateUserFi
 		&i.Email,
 		&i.Timezone,
 		&i.TimezoneUpdatedAt,
+		&i.DebugModeEnabled,
 	)
 	return i, err
 }
@@ -237,7 +240,7 @@ func (q *Queries) GetListenBrainzConfig(ctx context.Context, id pgtype.UUID) (Ge
 }

 const getUserByAPIToken = `-- name: GetUserByAPIToken :one
-SELECT id, username, password_hash, api_token, is_admin, created_at, subsonic_password, listenbrainz_token, listenbrainz_enabled, display_name, auto_approve_requests, email, timezone, timezone_updated_at FROM users WHERE api_token = $1
+SELECT id, username, password_hash, api_token, is_admin, created_at, subsonic_password, listenbrainz_token, listenbrainz_enabled, display_name, auto_approve_requests, email, timezone, timezone_updated_at, debug_mode_enabled FROM users WHERE api_token = $1
 `

 func (q *Queries) GetUserByAPIToken(ctx context.Context, apiToken string) (User, error) {
@@ -258,12 +261,13 @@ func (q *Queries) GetUserByAPIToken(ctx context.Context, apiToken string) (User,
 		&i.Email,
 		&i.Timezone,
 		&i.TimezoneUpdatedAt,
+		&i.DebugModeEnabled,
 	)
 	return i, err
 }

 const getUserByEmail = `-- name: GetUserByEmail :one
-SELECT id, username, password_hash, api_token, is_admin, created_at, subsonic_password, listenbrainz_token, listenbrainz_enabled, display_name, auto_approve_requests, email, timezone, timezone_updated_at FROM users WHERE lower(email) = lower($1)
+SELECT id, username, password_hash, api_token, is_admin, created_at, subsonic_password, listenbrainz_token, listenbrainz_enabled, display_name, auto_approve_requests, email, timezone, timezone_updated_at, debug_mode_enabled FROM users WHERE lower(email) = lower($1)
 `

 // Used by forgot-password lookup. Lowercase comparison both sides
@@ -287,12 +291,13 @@ func (q *Queries) GetUserByEmail(ctx context.Context, lower string) (User, error
 		&i.Email,
 		&i.Timezone,
 		&i.TimezoneUpdatedAt,
+		&i.DebugModeEnabled,
 	)
 	return i, err
 }

 const getUserByID = `-- name: GetUserByID :one
-SELECT id, username, password_hash, api_token, is_admin, created_at, subsonic_password, listenbrainz_token, listenbrainz_enabled, display_name, auto_approve_requests, email, timezone, timezone_updated_at FROM users WHERE id = $1
+SELECT id, username, password_hash, api_token, is_admin, created_at, subsonic_password, listenbrainz_token, listenbrainz_enabled, display_name, auto_approve_requests, email, timezone, timezone_updated_at, debug_mode_enabled FROM users WHERE id = $1
 `

 func (q *Queries) GetUserByID(ctx context.Context, id pgtype.UUID) (User, error) {
@@ -313,12 +318,13 @@ func (q *Queries) GetUserByID(ctx context.Context, id pgtype.UUID) (User, error)
 		&i.Email,
 		&i.Timezone,
 		&i.TimezoneUpdatedAt,
+		&i.DebugModeEnabled,
 	)
 	return i, err
 }

 const getUserByUsername = `-- name: GetUserByUsername :one
-SELECT id, username, password_hash, api_token, is_admin, created_at, subsonic_password, listenbrainz_token, listenbrainz_enabled, display_name, auto_approve_requests, email, timezone, timezone_updated_at FROM users WHERE username = $1
+SELECT id, username, password_hash, api_token, is_admin, created_at, subsonic_password, listenbrainz_token, listenbrainz_enabled, display_name, auto_approve_requests, email, timezone, timezone_updated_at, debug_mode_enabled FROM users WHERE username = $1
 `

 func (q *Queries) GetUserByUsername(ctx context.Context, username string) (User, error) {
@@ -339,6 +345,7 @@ func (q *Queries) GetUserByUsername(ctx context.Context, username string) (User,
 		&i.Email,
 		&i.Timezone,
 		&i.TimezoneUpdatedAt,
+		&i.DebugModeEnabled,
 	)
 	return i, err
 }
@@ -382,7 +389,8 @@ func (q *Queries) ListActiveUsersWithTimezones(ctx context.Context) ([]ListActiv
 }

 const listUsers = `-- name: ListUsers :many
-SELECT id, username, display_name, is_admin, auto_approve_requests, created_at
+SELECT id, username, display_name, is_admin, auto_approve_requests,
+       debug_mode_enabled, created_at
  FROM users
 ORDER BY created_at DESC
 `
@@ -393,6 +401,7 @@ type ListUsersRow struct {
 	DisplayName         *string
 	IsAdmin             bool
 	AutoApproveRequests bool
+	DebugModeEnabled    bool
 	CreatedAt           pgtype.Timestamptz
 }

@@ -412,6 +421,7 @@ func (q *Queries) ListUsers(ctx context.Context) ([]ListUsersRow, error) {
 			&i.DisplayName,
 			&i.IsAdmin,
 			&i.AutoApproveRequests,
+			&i.DebugModeEnabled,
 			&i.CreatedAt,
 		); err != nil {
 			return nil, err
@@ -426,7 +436,7 @@ func (q *Queries) ListUsers(ctx context.Context) ([]ListUsersRow, error) {

 const regenerateApiToken = `-- name: RegenerateApiToken :one
 UPDATE users SET api_token = $2 WHERE id = $1
-RETURNING id, username, password_hash, api_token, is_admin, created_at, subsonic_password, listenbrainz_token, listenbrainz_enabled, display_name, auto_approve_requests, email, timezone, timezone_updated_at
+RETURNING id, username, password_hash, api_token, is_admin, created_at, subsonic_password, listenbrainz_token, listenbrainz_enabled, display_name, auto_approve_requests, email, timezone, timezone_updated_at, debug_mode_enabled
 `

 type RegenerateApiTokenParams struct {
@@ -454,6 +464,7 @@ func (q *Queries) RegenerateApiToken(ctx context.Context, arg RegenerateApiToken
 		&i.Email,
 		&i.Timezone,
 		&i.TimezoneUpdatedAt,
+		&i.DebugModeEnabled,
 	)
 	return i, err
 }
@@ -478,6 +489,44 @@ func (q *Queries) ResetUserPassword(ctx context.Context, arg ResetUserPasswordPa
 	return err
 }

+const setDebugMode = `-- name: SetDebugMode :one
+UPDATE users
+   SET debug_mode_enabled = $2
+ WHERE id = $1
+RETURNING id, username, password_hash, api_token, is_admin, created_at, subsonic_password, listenbrainz_token, listenbrainz_enabled, display_name, auto_approve_requests, email, timezone, timezone_updated_at, debug_mode_enabled
+`
+
+type SetDebugModeParams struct {
+	ID               pgtype.UUID
+	DebugModeEnabled bool
+}
+
+// Toggle the per-account diagnostics/debug-reporting opt-in. Admin-driven
+// from /admin (flip remotely while a bug is live) or self-driven OFF from
+// the client. Returns the updated row so the handler can echo it.
+func (q *Queries) SetDebugMode(ctx context.Context, arg SetDebugModeParams) (User, error) {
+	row := q.db.QueryRow(ctx, setDebugMode, arg.ID, arg.DebugModeEnabled)
+	var i User
+	err := row.Scan(
+		&i.ID,
+		&i.Username,
+		&i.PasswordHash,
+		&i.ApiToken,
+		&i.IsAdmin,
+		&i.CreatedAt,
+		&i.SubsonicPassword,
+		&i.ListenbrainzToken,
+		&i.ListenbrainzEnabled,
+		&i.DisplayName,
+		&i.AutoApproveRequests,
+		&i.Email,
+		&i.Timezone,
+		&i.TimezoneUpdatedAt,
+		&i.DebugModeEnabled,
+	)
+	return i, err
+}
+
 const setListenBrainzEnabled = `-- name: SetListenBrainzEnabled :exec
 UPDATE users
 SET listenbrainz_enabled = $2
@@ -531,7 +580,7 @@ const updateUserAdmin = `-- name: UpdateUserAdmin :one
 UPDATE users
   SET is_admin = $2
 WHERE id = $1
-RETURNING id, username, password_hash, api_token, is_admin, created_at, subsonic_password, listenbrainz_token, listenbrainz_enabled, display_name, auto_approve_requests, email, timezone, timezone_updated_at
+RETURNING id, username, password_hash, api_token, is_admin, created_at, subsonic_password, listenbrainz_token, listenbrainz_enabled, display_name, auto_approve_requests, email, timezone, timezone_updated_at, debug_mode_enabled
 `

 type UpdateUserAdminParams struct {
@@ -559,6 +608,7 @@ func (q *Queries) UpdateUserAdmin(ctx context.Context, arg UpdateUserAdminParams
 		&i.Email,
 		&i.Timezone,
 		&i.TimezoneUpdatedAt,
+		&i.DebugModeEnabled,
 	)
 	return i, err
 }
@@ -567,7 +617,7 @@ const updateUserAutoApprove = `-- name: UpdateUserAutoApprove :one
 UPDATE users
   SET auto_approve_requests = $2
 WHERE id = $1
-RETURNING id, username, password_hash, api_token, is_admin, created_at, subsonic_password, listenbrainz_token, listenbrainz_enabled, display_name, auto_approve_requests, email, timezone, timezone_updated_at
+RETURNING id, username, password_hash, api_token, is_admin, created_at, subsonic_password, listenbrainz_token, listenbrainz_enabled, display_name, auto_approve_requests, email, timezone, timezone_updated_at, debug_mode_enabled
 `

 type UpdateUserAutoApproveParams struct {
@@ -594,6 +644,7 @@ func (q *Queries) UpdateUserAutoApprove(ctx context.Context, arg UpdateUserAutoA
 		&i.Email,
 		&i.Timezone,
 		&i.TimezoneUpdatedAt,
+		&i.DebugModeEnabled,
 	)
 	return i, err
 }
@@ -603,7 +654,7 @@ UPDATE users
   SET display_name = $2,
       email        = $3
 WHERE id = $1
-RETURNING id, username, password_hash, api_token, is_admin, created_at, subsonic_password, listenbrainz_token, listenbrainz_enabled, display_name, auto_approve_requests, email, timezone, timezone_updated_at
+RETURNING id, username, password_hash, api_token, is_admin, created_at, subsonic_password, listenbrainz_token, listenbrainz_enabled, display_name, auto_approve_requests, email, timezone, timezone_updated_at, debug_mode_enabled
 `

 type UpdateUserProfileParams struct {
@@ -632,6 +683,7 @@ func (q *Queries) UpdateUserProfile(ctx context.Context, arg UpdateUserProfilePa
 		&i.Email,
 		&i.Timezone,
 		&i.TimezoneUpdatedAt,
+		&i.DebugModeEnabled,
 	)
 	return i, err
 }
@@ -0,0 +1,2 @@
+ALTER TABLE users DROP COLUMN IF EXISTS debug_mode_enabled;
+DROP TABLE IF EXISTS diagnostic_events;
@@ -0,0 +1,54 @@
+-- Device diagnostics / debug-reporting subsystem (M9).
+--
+-- When an account has users.debug_mode_enabled = true, that account's
+-- client(s) stream a timeseries of device state here: connectivity +
+-- server-health transitions (roaming / poor-data recovery), UPnP/Sonos
+-- sync events (locked-phone desync), and power/lifecycle state (Doze /
+-- battery-optimization, the prime suspect for the desync). The admin
+-- /admin/diagnostics view filters by account + device + time window and
+-- exports the slice as JSON for offline analysis.
+--
+-- `kind` is a COARSE category gated by a CHECK whitelist; the finer
+-- event discriminator + all event-specific fields live in the `payload`
+-- jsonb. This keeps the enum small and stable so new event variants
+-- don't require a migration (per the enum-CHECK-whitelist rule, only a
+-- new *category* would). If you add a category here, mirror it in the
+-- handler whitelist in internal/api/diagnostics.go.
+--
+-- Two timestamps on purpose: occurred_at is the client device clock
+-- (when the event happened on the phone — may be skewed/wrong, e.g. in
+-- a dead zone), received_at is the server clock at ingest. Retention
+-- pruning is keyed on received_at so a bad client clock can't keep rows
+-- alive forever.
+
+CREATE TABLE diagnostic_events (
+    id          uuid PRIMARY KEY DEFAULT gen_random_uuid(),
+    user_id     uuid NOT NULL REFERENCES users(id) ON DELETE CASCADE,
+    client_id   text NOT NULL,
+    app_version text,
+    os_version  text,
+    kind        text NOT NULL,
+    payload     jsonb NOT NULL DEFAULT '{}'::jsonb,
+    occurred_at timestamptz NOT NULL,
+    received_at timestamptz NOT NULL DEFAULT now(),
+    CONSTRAINT diagnostic_events_kind_check
+        CHECK (kind IN (
+            'connectivity', 'upnp_sync', 'power', 'lifecycle',
+            'heartbeat', 'http'
+        ))
+);
+
+-- Admin reads filter by account then device, ordered newest-first.
+CREATE INDEX idx_diagnostic_events_user
+    ON diagnostic_events (user_id, occurred_at DESC);
+CREATE INDEX idx_diagnostic_events_client
+    ON diagnostic_events (client_id, occurred_at DESC);
+-- Retention pruner deletes by server-clock age.
+CREATE INDEX idx_diagnostic_events_received
+    ON diagnostic_events (received_at);
+
+-- Per-account opt-in for diagnostics reporting. Admin-set primarily
+-- (flip remotely while a bug is live); the client also exposes a local
+-- OFF switch. Default false: no account reports until explicitly enabled.
+ALTER TABLE users
+    ADD COLUMN IF NOT EXISTS debug_mode_enabled boolean NOT NULL DEFAULT false;
@@ -0,0 +1,9 @@
+-- Drop rows using the new value first so they don't violate the restored
+-- (narrower) constraint, then revert the whitelist.
+DELETE FROM diagnostic_events WHERE kind = 'playback';
+ALTER TABLE diagnostic_events DROP CONSTRAINT diagnostic_events_kind_check;
+ALTER TABLE diagnostic_events ADD CONSTRAINT diagnostic_events_kind_check
+    CHECK (kind IN (
+        'connectivity', 'upnp_sync', 'power', 'lifecycle',
+        'heartbeat', 'http'
+    ));
@@ -0,0 +1,19 @@
+-- Add 'playback' to the diagnostic_events kind whitelist (M9 follow-up).
+--
+-- `route` and `player_state` events fire for EVERY output route (phone
+-- speaker, Bluetooth, UPnP/Sonos), so bucketing them under 'upnp_sync'
+-- was misleading — an operator on Bluetooth earbuds saw "upnp_sync"
+-- rows. 'upnp_sync' now means genuinely UPnP/Sonos-specific signal
+-- (drops, and future resync/desync); general playback + route telemetry
+-- moves to the new 'playback' kind.
+--
+-- Per the enum-CHECK-whitelist rule, the new value lands by dropping and
+-- re-adding the constraint in the same change. Existing rows tagged
+-- 'upnp_sync' stay as-is (debug telemetry on a 30-day retention).
+
+ALTER TABLE diagnostic_events DROP CONSTRAINT diagnostic_events_kind_check;
+ALTER TABLE diagnostic_events ADD CONSTRAINT diagnostic_events_kind_check
+    CHECK (kind IN (
+        'connectivity', 'upnp_sync', 'power', 'lifecycle',
+        'heartbeat', 'http', 'playback'
+    ));
@@ -0,0 +1,66 @@
+-- name: InsertDiagnosticEvent :one
+-- Records one client-reported diagnostic event. The writer validates the
+-- `kind` category against its whitelist before this runs; the CHECK
+-- constraint is the belt-and-braces guard. payload carries the finer
+-- event discriminator + all event-specific fields. Returns received_at
+-- so the caller can confirm ingest.
+INSERT INTO diagnostic_events (
+    user_id, client_id, app_version, os_version, kind, payload, occurred_at
+)
+VALUES ($1, $2, $3, $4, $5, $6, $7)
+RETURNING id, received_at;
+
+-- name: ListAdminDiagnostics :many
+-- Admin timeline query. All filters are optional (NULL = no filter):
+-- account (user_id), device (client_id), category (kind), and the
+-- occurred_at window (from_ts/to_ts). Newest-first; the SPA reverses for
+-- a chronological timeline / export. Joined with users for the username
+-- so the view renders without a second round-trip.
+SELECT
+    de.id          AS id,
+    de.user_id     AS user_id,
+    u.username     AS username,
+    de.client_id   AS client_id,
+    de.app_version AS app_version,
+    de.os_version  AS os_version,
+    de.kind        AS kind,
+    de.payload     AS payload,
+    de.occurred_at AS occurred_at,
+    de.received_at AS received_at
+FROM diagnostic_events de
+JOIN users u ON u.id = de.user_id
+WHERE (sqlc.narg(user_id)::uuid   IS NULL OR de.user_id   = sqlc.narg(user_id)::uuid)
+  AND (sqlc.narg(client_id)::text IS NULL OR de.client_id = sqlc.narg(client_id)::text)
+  AND (sqlc.narg(kind)::text      IS NULL OR de.kind      = sqlc.narg(kind)::text)
+  AND (sqlc.narg(from_ts)::timestamptz IS NULL
+       OR de.occurred_at >= sqlc.narg(from_ts)::timestamptz)
+  AND (sqlc.narg(to_ts)::timestamptz IS NULL
+       OR de.occurred_at <= sqlc.narg(to_ts)::timestamptz)
+ORDER BY de.occurred_at DESC
+LIMIT sqlc.arg(lim)::int OFFSET sqlc.arg(off)::int;
+
+-- name: ListDiagnosticDevices :many
+-- Distinct devices that have reported, for the admin device filter +
+-- "who is currently reporting" overview. Optionally scoped to one account.
+SELECT
+    de.client_id            AS client_id,
+    de.user_id              AS user_id,
+    u.username              AS username,
+    max(de.app_version)::text        AS app_version,
+    max(de.os_version)::text         AS os_version,
+    max(de.occurred_at)::timestamptz AS last_seen,
+    count(*)                         AS event_count
+FROM diagnostic_events de
+JOIN users u ON u.id = de.user_id
+WHERE (sqlc.narg(user_id)::uuid IS NULL OR de.user_id = sqlc.narg(user_id)::uuid)
+GROUP BY de.client_id, de.user_id, u.username
+ORDER BY last_seen DESC;
+
+-- name: GcPruneDiagnostics :execrows
+-- Retention sweep for the gc worker. Deletes diagnostic_events older
+-- than 30 days by server clock (received_at) so a skewed client clock
+-- can't keep rows alive. Matches the other gc lifecycle sweeps'
+-- hardcoded-threshold style; diagnostics are debug telemetry, not user
+-- data, and 30 days is ample to investigate a live incident after the
+-- fact. Returns the affected row count for the sweep log line.
+DELETE FROM diagnostic_events WHERE received_at < now() - INTERVAL '30 days';
@@ -55,7 +55,8 @@ WHERE id = $1;

 -- name: ListUsers :many
 -- Admin user-management list. Sort newest-first.
-SELECT id, username, display_name, is_admin, auto_approve_requests, created_at
+SELECT id, username, display_name, is_admin, auto_approve_requests,
+       debug_mode_enabled, created_at
  FROM users
 ORDER BY created_at DESC;

@@ -115,6 +116,15 @@ UPDATE users
 WHERE id = $1
 RETURNING *;

+-- name: SetDebugMode :one
+-- Toggle the per-account diagnostics/debug-reporting opt-in. Admin-driven
+-- from /admin (flip remotely while a bug is live) or self-driven OFF from
+-- the client. Returns the updated row so the handler can echo it.
+UPDATE users
+   SET debug_mode_enabled = $2
+ WHERE id = $1
+RETURNING *;
+
 -- name: ChangeUserPassword :exec
 -- Self-service password change. Caller (HTTP handler) verifies the
 -- current password before calling this. Distinct from
@@ -16,6 +16,7 @@
 //   - GcExpireScrobbleQueueFailedRows (#567)
 //   - GcResetStuckSystemPlaylistRuns (#574)
 //   - GcDeleteExpiredPasswordResets   (#575)
+//   - GcPruneDiagnostics              (M9 — diagnostics 30d retention)
 package gc

 import (
@@ -82,6 +83,7 @@ func (w *Worker) tickOnce(ctx context.Context) {
 	w.runSweep(ctx, "expire_scrobble_failed", q.GcExpireScrobbleQueueFailedRows)
 	w.runSweep(ctx, "reset_stuck_system_runs", q.GcResetStuckSystemPlaylistRuns)
 	w.runSweep(ctx, "delete_expired_password_resets", q.GcDeleteExpiredPasswordResets)
+	w.runSweep(ctx, "prune_diagnostics", q.GcPruneDiagnostics)
 }

 // runSweep is a small adapter so each sweep call site is a one-liner
@@ -28,6 +28,7 @@ import (
 	"github.com/jackc/pgx/v5/pgxpool"

 	"git.fabledsword.com/bvandeusen/minstrel/internal/db/dbq"
+	"git.fabledsword.com/bvandeusen/minstrel/internal/eventbus"
 	"git.fabledsword.com/bvandeusen/minstrel/internal/taste"
 )

@@ -47,14 +48,21 @@ type Scheduler struct {
 	pool    *pgxpool.Pool
 	logger  *slog.Logger
 	dataDir string
+	bus     *eventbus.Bus // #968: announce rebuilds so clients self-refresh

 	mu   sync.Mutex
 	jobs map[pgtype.UUID]uuid.UUID // user_id → gocron job id
 }

 // NewScheduler builds an idle scheduler. Caller must invoke Start
-// before any builds fire.
-func NewScheduler(pool *pgxpool.Pool, logger *slog.Logger, dataDir string) (*Scheduler, error) {
+// before any builds fire. bus may be nil (tests); rebuild events are
+// then skipped.
+func NewScheduler(
+	pool *pgxpool.Pool,
+	logger *slog.Logger,
+	dataDir string,
+	bus *eventbus.Bus,
+) (*Scheduler, error) {
 	g, err := gocron.NewScheduler()
 	if err != nil {
 		return nil, fmt.Errorf("init gocron: %w", err)
@@ -64,6 +72,7 @@ func NewScheduler(pool *pgxpool.Pool, logger *slog.Logger, dataDir string) (*Sch
 		pool:    pool,
 		logger:  logger,
 		dataDir: dataDir,
+		bus:     bus,
 		jobs:    map[pgtype.UUID]uuid.UUID{},
 	}, nil
 }
@@ -234,7 +243,26 @@ func (s *Scheduler) rebuildUserDaily(ctx context.Context, userID pgtype.UUID, no
 	if err := BuildSystemPlaylists(ctx, s.pool, s.logger, userID, now, s.dataDir); err != nil {
 		s.logger.Warn("scheduler: build failed",
 			"user_id", uuidStringPL(userID), "err", err)
+		return
 	}
+	// #968: tell the user's connected clients their home content was
+	// regenerated, so a tab/app left open across the rebuild refreshes its
+	// system-playlist + You-might-like views (and a stale active queue can
+	// re-pull) instead of serving yesterday's snapshot until a manual reload.
+	s.publishRebuilt(userID)
+}
+
+// publishRebuilt broadcasts a user-scoped "system playlists rebuilt" event.
+// No-op when the bus is nil (test construction).
+func (s *Scheduler) publishRebuilt(userID pgtype.UUID) {
+	if s.bus == nil {
+		return
+	}
+	s.bus.Publish(eventbus.Event{
+		Kind:   "playlist.system_rebuilt",
+		UserID: uuidStringPL(userID),
+		Data:   map[string]any{},
+	})
 }

 // Stop drains gocron and stops the scheduler loop.
@@ -391,6 +391,7 @@ export type AdminUser = {
  display_name: string | null;
  is_admin: boolean;
  auto_approve_requests: boolean;
+  debug_mode_enabled: boolean;
  created_at: string;
 };

@@ -451,6 +452,12 @@ export async function updateUserAutoApprove(id: string, autoApprove: boolean): P
  return api.put<AdminUser>(`/api/admin/users/${id}/auto-approve`, { auto_approve: autoApprove });
 }

+// Flip an account's diagnostics/debug-reporting opt-in (M9). Admin-set;
+// the client obeys it (with a local per-device OFF switch).
+export async function updateUserDebugMode(id: string, enabled: boolean): Promise<AdminUser> {
+  return api.put<AdminUser>(`/api/admin/users/${id}/debug-mode`, { enabled });
+}
+
 export function createAdminUsersQuery() {
  return createQuery({
    queryKey: qk.adminUsers(),
@@ -497,3 +504,82 @@ export function createSMTPConfigQuery() {
    staleTime: 60_000
  });
 }
+
+// Device diagnostics (M9) ---------------------------------------------------
+
+// Coarse event category. The finer event sub-type lives inside `payload`.
+export type DiagnosticKind =
+  | 'connectivity'
+  | 'upnp_sync'
+  | 'power'
+  | 'lifecycle'
+  | 'heartbeat'
+  | 'http';
+
+export type AdminDiagnostic = {
+  id: string;
+  user_id: string;
+  username: string;
+  client_id: string;
+  app_version?: string;
+  os_version?: string;
+  kind: DiagnosticKind | string;
+  payload: Record<string, unknown>;
+  occurred_at: string;
+  received_at: string;
+};
+
+export type AdminDiagnosticDevice = {
+  client_id: string;
+  user_id: string;
+  username: string;
+  app_version: string;
+  os_version: string;
+  last_seen: string;
+  event_count: number;
+};
+
+export type DiagnosticsFilter = {
+  userId?: string;
+  clientId?: string;
+  kind?: string;
+  from?: string; // RFC3339
+  to?: string; // RFC3339
+  limit?: number;
+};
+
+export async function listAdminDiagnostics(f: DiagnosticsFilter): Promise<AdminDiagnostic[]> {
+  const params = new URLSearchParams();
+  if (f.userId) params.set('user_id', f.userId);
+  if (f.clientId) params.set('client_id', f.clientId);
+  if (f.kind) params.set('kind', f.kind);
+  if (f.from) params.set('from', f.from);
+  if (f.to) params.set('to', f.to);
+  if (f.limit !== undefined) params.set('limit', String(f.limit));
+  const qs = params.toString();
+  return api.get<AdminDiagnostic[]>(qs ? `/api/admin/diagnostics?${qs}` : '/api/admin/diagnostics');
+}
+
+export async function listDiagnosticDevices(userId?: string): Promise<AdminDiagnosticDevice[]> {
+  const qs = userId ? `?user_id=${userId}` : '';
+  return api.get<AdminDiagnosticDevice[]>(`/api/admin/diagnostics/devices${qs}`);
+}
+
+export function createAdminDiagnosticsQuery(f: DiagnosticsFilter) {
+  return createQuery({
+    queryKey: qk.adminDiagnostics(f as Record<string, string | number | undefined>),
+    queryFn: () => listAdminDiagnostics(f),
+    // The operator enables debug then watches events stream in; a short
+    // poll keeps the timeline live without manual refresh.
+    refetchInterval: 10_000,
+    staleTime: 5_000
+  });
+}
+
+export function createDiagnosticDevicesQuery(userId?: string) {
+  return createQuery({
+    queryKey: qk.adminDiagnosticDevices(userId),
+    queryFn: () => listDiagnosticDevices(userId),
+    staleTime: 15_000
+  });
+}
@@ -1,64 +0,0 @@
-import { afterEach, describe, expect, test, vi } from 'vitest';
-import { removeTrack } from './tracks';
-
-afterEach(() => {
-  vi.unstubAllGlobals();
-});
-
-function stubFetch(status: number, body: unknown, init: Partial<Response> = {}) {
-  const res = new Response(
-    body === null ? null : JSON.stringify(body),
-    { status, headers: { 'Content-Type': 'application/json' }, ...init }
-  );
-  const spy = vi.fn().mockResolvedValue(res);
-  vi.stubGlobal('fetch', spy);
-  return spy;
-}
-
-describe('removeTrack', () => {
-  test('DELETEs /api/admin/tracks/:id with no query string when unmonitor unset', async () => {
-    const spy = stubFetch(200, {
-      deleted_track_id: 't-1',
-      deleted_album_id: 'al-1'
-    });
-
-    const r = await removeTrack('t-1');
-    expect(r.deleted_track_id).toBe('t-1');
-    expect(r.deleted_album_id).toBe('al-1');
-    expect(r.deleted_artist_id).toBeUndefined();
-    expect(r.lidarr_unmonitor_failed).toBeUndefined();
-
-    const call = spy.mock.calls[0];
-    expect(call[0]).toBe('/api/admin/tracks/t-1');
-    expect((call[1] as RequestInit).method).toBe('DELETE');
-  });
-
-  test('appends ?unmonitor=true when option set', async () => {
-    const spy = stubFetch(200, {
-      deleted_track_id: 't-1',
-      lidarr_unmonitor_failed: true
-    });
-
-    const r = await removeTrack('t-1', { unmonitor: true });
-    expect(r.lidarr_unmonitor_failed).toBe(true);
-
-    const call = spy.mock.calls[0];
-    expect(call[0]).toBe('/api/admin/tracks/t-1?unmonitor=true');
-  });
-
-  test('omits the query string when unmonitor: false', async () => {
-    const spy = stubFetch(200, { deleted_track_id: 't-1' });
-
-    await removeTrack('t-1', { unmonitor: false });
-    const call = spy.mock.calls[0];
-    expect(call[0]).toBe('/api/admin/tracks/t-1');
-  });
-
-  test('surfaces not_found as ApiError', async () => {
-    stubFetch(404, { error: 'not_found' });
-
-    await expect(removeTrack('t-1')).rejects.toMatchObject({
-      code: 'not_found'
-    });
-  });
-});
@@ -1,42 +0,0 @@
-import { apiFetch } from '$lib/api/client';
-
-export type RemoveTrackResult = {
-  deleted_track_id: string;
-  deleted_album_id?: string;
-  deleted_artist_id?: string;
-  /** Only present (always `true` when set) when the operator requested
-   * unmonitor=true AND the Lidarr unmonitor call failed. The destructive
-   * file + DB delete already succeeded — surface a follow-up toast so
-   * the operator knows to manually unmonitor in Lidarr. */
-  lidarr_unmonitor_failed?: true;
-};
-
-export type RemoveTrackOptions = {
-  /** When true, after the file + DB delete the server calls
-   * Lidarr.UnmonitorTrack so Lidarr won't search for a replacement.
-   * When false / omitted, no Lidarr call — Lidarr's monitoring will
-   * re-import on next scan, which is the operator's "find a replacement"
-   * path. */
-  unmonitor?: boolean;
-};
-
-/**
- * DELETE /api/admin/tracks/{id} — admin-only. Deletes the file from
- * disk and the DB row, cascading album/artist tidy-up. Optionally
- * unmonitors the track in Lidarr.
- *
- * On success returns the deleted track id plus optional album/artist
- * ids when their parent row was tidied up by the server-side cascade.
- * Caller is responsible for invalidating any TanStack Query keys the
- * deleted entities backed.
- */
-export async function removeTrack(
-  id: string,
-  options: RemoveTrackOptions = {}
-): Promise<RemoveTrackResult> {
-  const params = new URLSearchParams();
-  if (options.unmonitor) params.set('unmonitor', 'true');
-  const qs = params.toString();
-  const url = `/api/admin/tracks/${encodeURIComponent(id)}${qs ? '?' + qs : ''}`;
-  return (await apiFetch(url, { method: 'DELETE' })) as RemoveTrackResult;
-}
@@ -50,6 +50,10 @@ export const qk = {
  coverProviders:         ()              => ['coverProviders'] as const,
  adminUsers:             ()              => ['adminUsers'] as const,
  adminInvites:           ()              => ['adminInvites'] as const,
+  adminDiagnostics:       (f: Record<string, string | number | undefined>) =>
+    ['adminDiagnostics', f] as const,
+  adminDiagnosticDevices: (userId?: string) =>
+    ['adminDiagnosticDevices', { userId: userId ?? 'all' }] as const,
  smtpConfig:             ()              => ['smtpConfig'] as const,
  suggestions:            (limit?: number) =>
    ['suggestions', { limit: limit ?? 12 }] as const,
@@ -9,6 +9,7 @@
    { href: '/admin/requests',        label: 'Requests'        },
    { href: '/admin/quarantine',      label: 'Quarantine'      },
    { href: '/admin/playback-errors', label: 'Playback errors' },
+    { href: '/admin/diagnostics',     label: 'Diagnostics'     },
    { href: '/admin/users',           label: 'Users'           }
  ];

@@ -52,7 +52,7 @@ describe('AdminTabs', () => {
    );
  });

-  test('renders all six tabs in order', () => {
+  test('renders all seven tabs in order', () => {
    state.pageUrl = new URL('http://localhost/admin');
    render(AdminTabs);
    const links = screen.getAllByRole('link');
@@ -62,6 +62,7 @@ describe('AdminTabs', () => {
      'Requests',
      'Quarantine',
      'Playback errors',
+      'Diagnostics',
      'Users'
    ]);
  });
@@ -1,18 +1,14 @@
 <script lang="ts">
  import type { AlbumRef, AlbumDetail } from '$lib/api/types';
-  import { FALLBACK_COVER } from '$lib/media/covers';
  import { api } from '$lib/api/client';
  import { enqueueTracks, playQueue } from '$lib/player/store.svelte';
  import { Play } from 'lucide-svelte';
  import AlbumMenu from './AlbumMenu.svelte';
  import CardActionCluster from './CardActionCluster.svelte';
+  import Cover from './Cover.svelte';

  let { album }: { album: AlbumRef } = $props();

-  function onImgError(e: Event) {
-    (e.currentTarget as HTMLImageElement).src = FALLBACK_COVER;
-  }
-
  async function onAddClick(e: MouseEvent) {
    e.preventDefault();
    e.stopPropagation();
@@ -38,12 +34,9 @@
             shadow-sm transition-all duration-150
             group-hover:shadow-lg group-hover:ring-1 group-hover:ring-accent/40"
    >
-      <img
+      <Cover
        src={album.cover_url}
-        alt=""
-        class="h-full w-full object-cover transition-transform group-hover:scale-[1.03]"
-        loading="lazy"
-        onerror={onImgError}
+        class="transition-transform group-hover:scale-[1.03]"
      />
      <button
        type="button"
@@ -2,9 +2,10 @@
  import type { ArtistRef, TrackRef } from '$lib/api/types';
  import { api } from '$lib/api/client';
  import { playQueue, enqueueTracks } from '$lib/player/store.svelte';
-  import { Disc3, Play } from 'lucide-svelte';
+  import { Play } from 'lucide-svelte';
  import ArtistMenu from './ArtistMenu.svelte';
  import CardActionCluster from './CardActionCluster.svelte';
+  import Cover from './Cover.svelte';
  import { listArtistTracks } from '$lib/api/artists';

  let { artist }: { artist: ArtistRef } = $props();
@@ -48,18 +49,12 @@
    class="block rounded focus-visible:ring-2 focus-visible:ring-accent"
  >
    <div class="art-wrap relative mx-auto aspect-square w-full overflow-hidden rounded-full bg-surface-hover">
-      {#if artist.cover_url}
-        <img
-          src={artist.cover_url}
-          alt=""
-          class="h-full w-full object-cover transition-transform group-hover:scale-[1.03]"
-          loading="lazy"
-        />
-      {:else}
-        <div class="flex h-full w-full items-center justify-center">
-          <Disc3 strokeWidth={1} class="h-4/5 w-4/5 text-text-muted" />
-        </div>
-      {/if}
+      <Cover
+        src={artist.cover_url}
+        shape="round"
+        fallback="artist"
+        class="transition-transform group-hover:scale-[1.03]"
+      />
      <button
        type="button"
        aria-label={`Play ${artist.name}`}
@@ -1,9 +1,11 @@
 <script lang="ts">
+  import { Plus } from 'lucide-svelte';
  import type { TrackRef } from '$lib/api/types';
  import { playQueue, enqueueTrack } from '$lib/player/store.svelte';
-  import { FALLBACK_COVER, coverUrl } from '$lib/media/covers';
+  import { coverUrl } from '$lib/media/covers';
  import TrackMenu from './TrackMenu.svelte';
-  import CardActionCluster from './CardActionCluster.svelte';
+  import LikeButton from './LikeButton.svelte';
+  import Cover from './Cover.svelte';

  // Horizontal compact track row — cover thumb on the left, title +
  // artist on the right. Mirrors Android's CompactTrackTile so the
@@ -22,10 +24,6 @@

  const cover = $derived(coverUrl(track.album_id));

-  function onImgError(e: Event) {
-    (e.currentTarget as HTMLImageElement).src = FALLBACK_COVER;
-  }
-
  function onClick() {
    playQueue(sectionTracks, index);
  }
@@ -42,31 +40,40 @@
    type="button"
    aria-label={`Play ${track.title}`}
    onclick={onClick}
-    class="flex w-full items-center gap-2 rounded-md p-1 pr-12 text-left
+    class="flex w-full items-center gap-2 rounded-md p-1 pr-24 text-left
           hover:bg-surface-hover focus-visible:ring-2 focus-visible:ring-accent"
  >
    <div class="h-12 w-12 flex-shrink-0 overflow-hidden rounded bg-surface-hover">
-      <img
-        src={cover}
-        alt=""
-        class="h-full w-full object-cover"
-        loading="lazy"
-        onerror={onImgError}
-      />
+      <Cover src={cover} />
    </div>
    <div class="min-w-0 flex-1">
      <div class="truncate text-sm font-medium text-text-primary">{track.title}</div>
      <div class="truncate text-xs text-text-secondary">{track.artist_name}</div>
    </div>
  </button>
-  <CardActionCluster
-    likeEntityType="track"
-    likeEntityId={track.id}
-    onAdd={onAddToQueue}
-    addLabel={`Add ${track.title} to queue`}
+  <!-- Single inline cluster, vertically centred on the right. The shared
+       CardActionCluster splits Like+Add (top) and the menu (bottom) into
+       opposite corners — correct for the tall square Album/Artist cards but
+       it makes the two groups collide on this short one-line row. A compact
+       row keeps all three controls in one horizontal group instead. -->
+  <!-- svelte-ignore a11y_click_events_have_key_events -->
+  <!-- svelte-ignore a11y_no_static_element_interactions -->
+  <div
+    class="absolute right-2 top-1/2 z-10 flex -translate-y-1/2 items-center gap-0.5
+           opacity-0 transition-opacity duration-150
+           group-hover:opacity-100 focus-within:opacity-100"
+    onclick={(e) => e.stopPropagation()}
  >
-    {#snippet menu()}
-      <TrackMenu {track} />
-    {/snippet}
-  </CardActionCluster>
+    <LikeButton entityType="track" entityId={track.id} size="sm" />
+    <button
+      type="button"
+      aria-label={`Add ${track.title} to queue`}
+      onclick={onAddToQueue}
+      class="rounded-full bg-surface p-1 text-text-secondary hover:text-text-primary
+             focus-visible:ring-2 focus-visible:ring-accent"
+    >
+      <Plus size={16} strokeWidth={1} />
+    </button>
+    <TrackMenu {track} />
+  </div>
 </div>
@@ -10,10 +10,6 @@ vi.mock('$lib/api/likes', () => emptyLikesMock());

 vi.mock('$lib/api/quarantine', () => emptyQuarantineMock());

-vi.mock('$lib/api/admin/tracks', () => ({
-  removeTrack: vi.fn().mockResolvedValue({ deleted_track_id: 't1' })
-}));
-
 vi.mock('$lib/api/playlists', () => emptyPlaylistsMock());

 vi.mock('$lib/auth/store.svelte', () => ({
@@ -0,0 +1,66 @@
+<script lang="ts">
+  import { FALLBACK_COVER } from '$lib/media/covers';
+  import { Disc3 } from 'lucide-svelte';
+
+  // Shared cover-artwork renderer. The web counterpart of Android's
+  // CoverTile/ServerImage: one place that owns the loading placeholder and
+  // the error fallback so no card sits blank while art loads or 404s (the
+  // "You might like" row surfaces unplayed items whose art is often not yet
+  // backfilled). Replaces the three hand-rolled <img> tags that previously
+  // disagreed on fallback handling.
+  let {
+    src,
+    alt = '',
+    shape = 'square',
+    fallback = 'image',
+    class: klass = ''
+  }: {
+    src: string | undefined;
+    alt?: string;
+    // 'round' clips to a circle (artist avatars); 'square' leaves clipping
+    // to the parent so existing rounded-md / rounded corners still apply.
+    shape?: 'square' | 'round';
+    // 'artist' degrades to a Disc3 icon; 'image' to the static placeholder
+    // cover. A null/empty src is treated the same as a failed load.
+    fallback?: 'image' | 'artist';
+    class?: string;
+  } = $props();
+
+  // Per-image lifecycle. Reset when src changes so a reused card (virtualized
+  // list, client-side nav) never keeps a stale 'loaded'/'failed'.
+  let loaded = $state(false);
+  let failed = $state(false);
+  $effect(() => {
+    void src;
+    loaded = false;
+    failed = false;
+  });
+
+  const useIcon = $derived(fallback === 'artist' && (failed || !src));
+  // On failure for the image fallback, swap to the static placeholder asset.
+  // src doesn't change on the second error, so there's no reload loop.
+  const imgSrc = $derived(failed ? FALLBACK_COVER : src);
+</script>
+
+<div
+  class="relative h-full w-full overflow-hidden bg-surface-hover {shape === 'round'
+    ? 'rounded-full'
+    : ''}"
+>
+  {#if useIcon}
+    <div class="flex h-full w-full items-center justify-center">
+      <Disc3 strokeWidth={1} class="h-4/5 w-4/5 text-text-muted" />
+    </div>
+  {:else if imgSrc}
+    <img
+      src={imgSrc}
+      {alt}
+      class="h-full w-full object-cover transition-opacity duration-200 {loaded
+        ? 'opacity-100'
+        : 'opacity-0'} {klass}"
+      loading="lazy"
+      onload={() => (loaded = true)}
+      onerror={() => (failed = true)}
+    />
+  {/if}
+</div>
@@ -272,8 +272,12 @@
    data-testid="player-bar-desktop"
    class="hidden md:flex md:flex-row md:min-h-[108px] md:items-center md:gap-4 border-t border-border bg-surface md:px-4 md:py-1.5"
  >
-    <!-- Left: cover + title + artist + like + menu -->
-    <div class="flex w-72 min-w-0 items-center gap-3">
+    <!-- Left: cover + title + artist + like + menu.
+         basis-72 grow max-w-md: holds its 288px floor at the md breakpoint
+         (where the seek column is the flex-1 that absorbs the remainder), but
+         on wider screens it grows up to 448px instead of leaving the title
+         truncated while the seek bar hogs the slack. -->
+    <div class="flex basis-72 grow max-w-md min-w-0 items-center gap-3">
      <a
        href="/now-playing"
        aria-label="Open now playing"
@@ -318,7 +322,10 @@
        </button>
      </div>
    {:else}
-      <div class="flex flex-1 flex-col items-stretch gap-2">
+      <!-- max-w-xl + mx-auto caps the seek bar (and the transport row) at
+           576px and centres it, so on wide screens the extra width flows to
+           the title column on the left rather than stretching the scrubber. -->
+      <div class="flex flex-1 flex-col items-stretch gap-2 mx-auto w-full max-w-xl">
        <!-- Transport row -->
        <div class="flex items-center justify-center gap-3">
          <button
@@ -5,6 +5,7 @@
  import { user } from '$lib/auth/store.svelte';
  import { getPlaylist, systemShuffle, refreshSystem } from '$lib/api/playlists';
  import { playlistTrackToRef } from '$lib/playlists/playlistTrackToRef';
+  import { systemPlaylistRefetch } from '$lib/playlists/systemRefetch';
  import { errCode } from '$lib/api/errors';
  import { qk } from '$lib/api/queries';
  import { playQueue } from '$lib/player/store.svelte';
@@ -80,7 +81,14 @@
        const detail = await systemShuffle(variant);
        const refs = toTrackRefs(detail.tracks);
        if (refs.length > 0) {
-          playQueue(refs, 0, { source: variant });
+          playQueue(refs, 0, {
+            source: variant,
+            refetch: systemPlaylistRefetch({
+              variant,
+              playlistId: playlist.id,
+              perArtist: false,
+            }),
+          });
        }
      } else {
        const detail = await getPlaylist(playlist.id);
@@ -93,7 +101,14 @@
          // so source attribution stays absent — the PlaylistCard
          // test pins this contract.
          if (variant != null) {
-            playQueue(refs, 0, { source: variant });
+            playQueue(refs, 0, {
+              source: variant,
+              refetch: systemPlaylistRefetch({
+                variant,
+                playlistId: playlist.id,
+                perArtist: true,
+              }),
+            });
          } else {
            playQueue(refs, 0);
          }
@@ -21,10 +21,6 @@ vi.mock('$lib/api/likes', () => emptyLikesMock());

 vi.mock('$lib/api/quarantine', () => emptyQuarantineMock());

-vi.mock('$lib/api/admin/tracks', () => ({
-  removeTrack: vi.fn().mockResolvedValue({ deleted_track_id: 't-1' })
-}));
-
 vi.mock('$lib/player/store.svelte', () => ({
  playNext: vi.fn(),
  enqueueTrack: vi.fn(),
@@ -1,103 +0,0 @@
-<script lang="ts">
-  import { Trash2 } from 'lucide-svelte';
-  import { useQueryClient } from '@tanstack/svelte-query';
-  import { removeTrack } from '$lib/api/admin/tracks';
-  import { errMessage } from '$lib/api/errors';
-  import { qk } from '$lib/api/queries';
-  import type { TrackRef } from '$lib/api/types';
-
-  let {
-    track,
-    onClose
-  }: {
-    track: TrackRef;
-    onClose: () => void;
-  } = $props();
-
-  const queryClient = useQueryClient();
-
-  let unmonitor = $state(false);
-  let busy = $state(false);
-  let error = $state<string | null>(null);
-
-  async function confirm() {
-    busy = true;
-    error = null;
-    try {
-      const result = await removeTrack(track.id, { unmonitor });
-      // Invalidate caches for any vanished entity. The album/artist that
-      // contained the track is always touched; if the parent rows were
-      // tidied up by the server cascade, evict those too. Home payload
-      // surfaces albums/artists on the landing page so it always
-      // refreshes.
-      await queryClient.invalidateQueries({ queryKey: qk.album(track.album_id) });
-      await queryClient.invalidateQueries({ queryKey: qk.artist(track.artist_id) });
-      await queryClient.invalidateQueries({ queryKey: qk.home() });
-      if (result.deleted_album_id) {
-        await queryClient.invalidateQueries({ queryKey: qk.album(result.deleted_album_id) });
-      }
-      if (result.deleted_artist_id) {
-        await queryClient.invalidateQueries({ queryKey: qk.artist(result.deleted_artist_id) });
-      }
-      // Note: result.lidarr_unmonitor_failed is true when unmonitor was
-      // requested AND Lidarr couldn't be reached. The destructive part
-      // already succeeded; we still close the popover. A future toast
-      // surface (if any) can pick up the flag.
-      onClose();
-    } catch (e: unknown) {
-      error = errMessage(e);
-    } finally {
-      busy = false;
-    }
-  }
-</script>
-
-<div
-  role="dialog"
-  tabindex="-1"
-  aria-modal="false"
-  aria-labelledby="remove-track-popover-title"
-  class="absolute right-0 z-30 mt-1 w-72 rounded-lg border border-border bg-surface p-3 shadow-xl"
-  onclick={(e) => e.stopPropagation()}
-  onkeydown={(e) => { e.stopPropagation(); if (e.key === 'Escape') onClose(); }}
->
-  <h4 id="remove-track-popover-title" class="text-sm font-medium text-text-primary">
-    Remove "{track.title}" from your library?
-  </h4>
-  <p class="mt-1 text-xs text-text-muted">
-    This deletes the file from disk.
-  </p>
-
-  <label class="mt-3 flex items-start gap-2 text-sm text-text-primary">
-    <input
-      type="checkbox"
-      bind:checked={unmonitor}
-      class="mt-0.5 rounded border-border"
-    />
-    <span>Also stop Lidarr from finding a replacement</span>
-  </label>
-
-  {#if error}
-    <p class="mt-2 text-xs text-action-destructive">{error}</p>
-  {/if}
-
-  <div class="mt-3 flex justify-end gap-2">
-    <button
-      type="button"
-      class="rounded-md border border-border px-2.5 py-1 text-sm text-text-secondary hover:text-text-primary disabled:opacity-50"
-      onclick={onClose}
-      disabled={busy}
-    >
-      Cancel
-    </button>
-    <button
-      type="button"
-      onclick={confirm}
-      disabled={busy}
-      class="inline-flex items-center gap-1 rounded-md border border-border bg-surface px-2.5 py-1 text-sm text-action-destructive hover:bg-surface-hover disabled:opacity-50"
-    >
-      <Trash2 size={14} strokeWidth={1} />
-      {busy ? 'Removing…' : 'Remove'}
-    </button>
-  </div>
-</div>
@@ -1,97 +0,0 @@
-import { afterEach, describe, expect, test, vi } from 'vitest';
-import { render, screen, fireEvent, waitFor } from '@testing-library/svelte';
-import { makeTrack } from '$test-utils/fixtures/track';
-
-const invalidateMock = vi.fn();
-vi.mock('@tanstack/svelte-query', async (orig) => {
-  const actual = (await orig()) as Record<string, unknown>;
-  return {
-    ...actual,
-    useQueryClient: () => ({ invalidateQueries: invalidateMock })
-  };
-});
-
-vi.mock('$lib/api/admin/tracks', () => ({
-  removeTrack: vi.fn()
-}));
-
-import RemoveTrackPopover from './RemoveTrackPopover.svelte';
-import { removeTrack } from '$lib/api/admin/tracks';
-
-const track = makeTrack({ title: 'Roygbiv' });
-
-afterEach(() => vi.clearAllMocks());
-
-describe('RemoveTrackPopover', () => {
-  test('renders the title and subtext', () => {
-    render(RemoveTrackPopover, { props: { track, onClose: vi.fn() } });
-    expect(screen.getByText(/remove "roygbiv" from your library/i)).toBeInTheDocument();
-    expect(screen.getByText(/this deletes the file from disk/i)).toBeInTheDocument();
-  });
-
-  test('renders the Lidarr unmonitor checkbox', () => {
-    render(RemoveTrackPopover, { props: { track, onClose: vi.fn() } });
-    const cb = screen.getByRole('checkbox', { name: /also stop lidarr/i });
-    expect(cb).toBeInTheDocument();
-    expect((cb as HTMLInputElement).checked).toBe(false);
-  });
-
-  test('Cancel button calls onClose without firing removeTrack', async () => {
-    const onClose = vi.fn();
-    render(RemoveTrackPopover, { props: { track, onClose } });
-    await fireEvent.click(screen.getByRole('button', { name: /cancel/i }));
-    expect(removeTrack).not.toHaveBeenCalled();
-    expect(onClose).toHaveBeenCalled();
-  });
-
-  test('Remove without checkbox calls removeTrack with unmonitor=false', async () => {
-    (removeTrack as ReturnType<typeof vi.fn>).mockResolvedValue({ deleted_track_id: 't1' });
-    const onClose = vi.fn();
-    render(RemoveTrackPopover, { props: { track, onClose } });
-    await fireEvent.click(screen.getByRole('button', { name: /^remove$/i }));
-    // confirm() chains 3-5 awaited invalidateQueries calls before onClose,
-    // each a separate microtask. waitFor polls until the side effects land.
-    await waitFor(() => expect(onClose).toHaveBeenCalled());
-    expect(removeTrack).toHaveBeenCalledWith('t1', { unmonitor: false });
-  });
-
-  test('Remove with checkbox checked calls removeTrack with unmonitor=true', async () => {
-    (removeTrack as ReturnType<typeof vi.fn>).mockResolvedValue({ deleted_track_id: 't1' });
-    const onClose = vi.fn();
-    render(RemoveTrackPopover, { props: { track, onClose } });
-    await fireEvent.click(screen.getByRole('checkbox', { name: /also stop lidarr/i }));
-    await fireEvent.click(screen.getByRole('button', { name: /^remove$/i }));
-    await waitFor(() => expect(onClose).toHaveBeenCalled());
-    expect(removeTrack).toHaveBeenCalledWith('t1', { unmonitor: true });
-  });
-
-  test('failed remove surfaces error via copyForCode and does not close', async () => {
-    (removeTrack as ReturnType<typeof vi.fn>).mockRejectedValue({ code: 'not_found' });
-    const onClose = vi.fn();
-    render(RemoveTrackPopover, { props: { track, onClose } });
-    await fireEvent.click(screen.getByRole('button', { name: /^remove$/i }));
-    await waitFor(() => expect(removeTrack).toHaveBeenCalled());
-    // The catch path runs synchronously after the rejected await; one more
-    // microtask boundary is enough.
-    await Promise.resolve();
-    expect(onClose).not.toHaveBeenCalled();
-  });
-
-  test('success invalidates album, artist and home queries', async () => {
-    (removeTrack as ReturnType<typeof vi.fn>).mockResolvedValue({
-      deleted_track_id: 't1',
-      deleted_album_id: 'a1',
-      deleted_artist_id: 'ar1'
-    });
-    render(RemoveTrackPopover, { props: { track, onClose: vi.fn() } });
-    await fireEvent.click(screen.getByRole('button', { name: /^remove$/i }));
-    // Wait for all three baseline invalidations (album, artist, home) plus
-    // the two cascade ones (deleted_album_id, deleted_artist_id) to land.
-    await waitFor(() => expect(invalidateMock.mock.calls.length).toBeGreaterThanOrEqual(5));
-    const keys = invalidateMock.mock.calls.map((c) => c[0].queryKey);
-    const flat = keys.map((k) => Array.isArray(k) ? k.join('|') : String(k));
-    expect(flat.some((k) => k.startsWith('album|a1'))).toBe(true);
-    expect(flat.some((k) => k.startsWith('artist|ar1'))).toBe(true);
-    expect(flat.some((k) => k === 'home')).toBe(true);
-  });
-});
@@ -1,30 +1,27 @@
 <script lang="ts">
  import {
    MoreVertical,
-    ListPlus,
-    Plus,
+    ListVideo,
+    ListMusic,
    Heart,
    HeartOff,
-    ListMusic,
-    Album,
+    ListPlus,
+    Radio,
    Disc3,
-    Flag,
+    User,
    EyeOff,
-    Eye,
-    Trash2
+    Eye
  } from 'lucide-svelte';
  import { goto } from '$app/navigation';
  import { useQueryClient } from '@tanstack/svelte-query';
  import FlagPopover from './FlagPopover.svelte';
-  import RemoveTrackPopover from './RemoveTrackPopover.svelte';
  import AddToPlaylistMenu from './AddToPlaylistMenu.svelte';
  import TrackMenuItem from './TrackMenuItem.svelte';
  import TrackMenuDivider from './TrackMenuDivider.svelte';
-  import { user } from '$lib/auth/store.svelte';
  import { createLikedIdsQuery, likeEntity, unlikeEntity } from '$lib/api/likes';
  import { createMyQuarantineQuery, unflagTrack } from '$lib/api/quarantine';
  import { qk } from '$lib/api/queries';
-  import { playNext, enqueueTrack } from '$lib/player/store.svelte';
+  import { playNext, enqueueTrack, playRadio } from '$lib/player/store.svelte';
  import type { TrackRef } from '$lib/api/types';

  let {
@@ -44,7 +41,6 @@

  let menuOpen = $state(false);
  let flagOpen = $state(false);
-  let removeOpen = $state(false);
  let addOpen = $state(false);

  const queryClient = useQueryClient();
@@ -63,8 +59,6 @@
    return rows.some((r) => r.track_id === track.id);
  });

-  const isAdmin = $derived(user.value?.is_admin === true);
-
  function toggleMenu(e: MouseEvent) {
    e.stopPropagation();
    menuOpen = !menuOpen;
@@ -73,7 +67,6 @@
  function closeAll() {
    menuOpen = false;
    flagOpen = false;
-    removeOpen = false;
    addOpen = false;
  }

@@ -87,6 +80,11 @@
    closeAll();
  }

+  function onStartRadio() {
+    playRadio(track.id);
+    closeAll();
+  }
+
  async function onToggleLike() {
    closeAll();
    if (liked) {
@@ -119,18 +117,8 @@
    goto(`/artists/${track.artist_id}`);
  }

-  function onFlag() {
-    menuOpen = false;
-    flagOpen = true;
-  }
-
-  function onRemoveOpen() {
-    menuOpen = false;
-    removeOpen = true;
-  }
-
  function onKeydown(e: KeyboardEvent) {
-    if (!menuOpen && !flagOpen && !removeOpen && !addOpen) return;
+    if (!menuOpen && !flagOpen && !addOpen) return;
    if (e.key === 'Escape') {
      e.preventDefault();
      closeAll();
@@ -161,9 +149,16 @@
      onclick={(e) => e.stopPropagation()}
      onkeydown={(e) => { e.stopPropagation(); if (e.key === 'Escape') menuOpen = false; }}
    >
+      <!-- Item set + order mirror Android's canonical TrackActionsSheet so
+           the kebab reads the same on both clients: queue group → like /
+           add-to-playlist / start-radio group → navigation group → hide.
+           "Start radio" is shown even under hideQueueActions (reseeding a
+           station from the current track is meaningful where play-next /
+           add-to-queue are not). No single-click destructive action lives
+           here — track removal is intentionally kept out of the kebab. -->
      {#if !hideQueueActions}
-        <TrackMenuItem icon={ListPlus} label="Play next" onclick={onPlayNext} />
-        <TrackMenuItem icon={Plus} label="Add to queue" onclick={onAddToQueue} />
+        <TrackMenuItem icon={ListVideo} label="Play next" onclick={onPlayNext} />
+        <TrackMenuItem icon={ListMusic} label="Add to queue" onclick={onAddToQueue} />

        <TrackMenuDivider />
      {/if}
@@ -174,32 +169,24 @@
        onclick={onToggleLike}
      />
      <TrackMenuItem
-        icon={ListMusic}
+        icon={ListPlus}
        label="Add to playlist…"
        onclick={() => { addOpen = true; menuOpen = false; }}
      />
+      <TrackMenuItem icon={Radio} label="Start radio" onclick={onStartRadio} />

      <TrackMenuDivider />

-      <TrackMenuItem icon={Album} label="Go to album" onclick={onGoToAlbum} />
-      <TrackMenuItem icon={Disc3} label="Go to artist" onclick={onGoToArtist} />
+      <TrackMenuItem icon={Disc3} label="Go to album" onclick={onGoToAlbum} />
+      <TrackMenuItem icon={User} label="Go to artist" onclick={onGoToArtist} />

      <TrackMenuDivider />

-      <TrackMenuItem icon={Flag} label="Flag this track…" onclick={onFlag} />
      <TrackMenuItem
        icon={hidden ? Eye : EyeOff}
        label={hidden ? 'Unhide' : 'Hide'}
        onclick={onToggleHide}
      />
-      {#if isAdmin}
-        <TrackMenuItem
-          icon={Trash2}
-          label="Remove from library"
-          onclick={onRemoveOpen}
-          danger
-        />
-      {/if}
    </div>
  {/if}

@@ -207,10 +194,6 @@
    <FlagPopover {track} onClose={closeAll} />
  {/if}

-  {#if removeOpen}
-    <RemoveTrackPopover {track} onClose={closeAll} />
-  {/if}
-
  {#if addOpen}
    <AddToPlaylistMenu tracks={[track]} onClose={() => (addOpen = false)} />
  {/if}
@@ -25,19 +25,16 @@ vi.mock('$lib/api/likes', () => emptyLikesMock());

 vi.mock('$lib/api/quarantine', () => emptyQuarantineMock());

-vi.mock('$lib/api/admin/tracks', () => ({
-  removeTrack: vi.fn().mockResolvedValue({ deleted_track_id: 't1' })
-}));
-
 vi.mock('$lib/api/playlists', () => emptyPlaylistsMock());

 vi.mock('$lib/player/store.svelte', () => ({
  playNext: vi.fn(),
-  enqueueTrack: vi.fn()
+  enqueueTrack: vi.fn(),
+  playRadio: vi.fn()
 }));

 import TrackMenu from './TrackMenu.svelte';
-import { playNext, enqueueTrack } from '$lib/player/store.svelte';
+import { playNext, enqueueTrack, playRadio } from '$lib/player/store.svelte';

 const track = makeTrack({ title: 'Roygbiv' });

@@ -55,7 +52,7 @@ describe('TrackMenu', () => {
    expect(kebab.getAttribute('aria-expanded')).toBe('true');
  });

-  test('opening menu shows all 9 entries for an admin user', async () => {
+  test('opening menu shows all 8 entries', async () => {
    render(TrackMenu, { props: { track } });
    await fireEvent.click(screen.getByRole('button', { name: /track actions/i }));

@@ -63,19 +60,12 @@ describe('TrackMenu', () => {
    expect(screen.getByRole('menuitem', { name: /add to queue/i })).toBeInTheDocument();
    expect(screen.getByRole('menuitem', { name: /^like$/i })).toBeInTheDocument();
    expect(screen.getByRole('menuitem', { name: /add to playlist/i })).toBeInTheDocument();
+    expect(screen.getByRole('menuitem', { name: /start radio/i })).toBeInTheDocument();
    expect(screen.getByRole('menuitem', { name: /go to album/i })).toBeInTheDocument();
    expect(screen.getByRole('menuitem', { name: /go to artist/i })).toBeInTheDocument();
-    expect(screen.getByRole('menuitem', { name: /flag this track/i })).toBeInTheDocument();
    expect(screen.getByRole('menuitem', { name: /^hide$/i })).toBeInTheDocument();
-    expect(screen.getByRole('menuitem', { name: /remove from library/i })).toBeInTheDocument();

-    expect(screen.getAllByRole('menuitem')).toHaveLength(9);
-  });
-
-  test('"Remove from library" hidden for non-admin', async () => {
-    userState.current = { id: 'u2', username: 'normal', is_admin: false };
-    render(TrackMenu, { props: { track } });
-    await fireEvent.click(screen.getByRole('button', { name: /track actions/i }));
+    // No "Remove from library" — destructive removal is intentionally absent.
    expect(screen.queryByRole('menuitem', { name: /remove from library/i })).not.toBeInTheDocument();
    expect(screen.getAllByRole('menuitem')).toHaveLength(8);
  });
@@ -113,10 +103,17 @@ describe('TrackMenu', () => {
    expect(screen.queryByRole('menu')).not.toBeInTheDocument();
  });

-  test('clicking "Flag this track…" opens FlagPopover and closes menu', async () => {
+  test('"Start radio" dispatches playRadio(track.id)', async () => {
    render(TrackMenu, { props: { track } });
    await fireEvent.click(screen.getByRole('button', { name: /track actions/i }));
-    await fireEvent.click(screen.getByRole('menuitem', { name: /flag this track/i }));
+    await fireEvent.click(screen.getByRole('menuitem', { name: /start radio/i }));
+    expect(playRadio).toHaveBeenCalledWith(track.id);
+  });
+
+  test('clicking "Hide" opens the flag/quarantine popover and closes menu', async () => {
+    render(TrackMenu, { props: { track } });
+    await fireEvent.click(screen.getByRole('button', { name: /track actions/i }));
+    await fireEvent.click(screen.getByRole('menuitem', { name: /^hide$/i }));
    expect(screen.queryByRole('menu')).not.toBeInTheDocument();
    expect(
      screen.getByRole('dialog', { name: /flag this track as broken/i })
@@ -83,6 +83,23 @@ let _radioRefreshInFlight = false;
 // queue clears it).
 let _queueSource = $state<string | null>(null);

+// Track B (#968): consecutive load failures since the last successful
+// 'playing'. A bad track auto-advances instead of dead-ending; the streak
+// (capped against queue length) stops a fully-unplayable queue from
+// looping forever. Reset on a successful play and on a fresh playQueue.
+let _failureStreak = 0;
+
+// Track B (#968): when a queue is seeded from a refreshable source (a system
+// playlist or radio), the seeder hands us a closure that re-pulls the fresh
+// snapshot. On total failure (whole queue unplayable — likely a stale tab
+// left open across the daily rebuild) we call it once to self-heal before
+// surfacing the dead-end. Kept opaque so the store stays decoupled from the
+// playlist API and the per-artist (songs_like_artist) identity problem.
+let _queueRefetch: (() => Promise<TrackRef[]>) | null = null;
+let _selfHealInFlight = false;
+let _selfHealAttempts = 0;
+const MAX_SELF_HEAL_ATTEMPTS = 1;
+
 let _audioEl: HTMLAudioElement | null = null;

 export const player = {
@@ -109,13 +126,20 @@ export function registerAudioEl(el: HTMLAudioElement | null): void {
 export function playQueue(
  tracks: TrackRef[],
  startIndex = 0,
-  opts: { shuffle?: boolean; source?: string | null } = {},
+  opts: {
+    shuffle?: boolean;
+    source?: string | null;
+    refetch?: () => Promise<TrackRef[]>;
+  } = {},
 ): void {
  _radioSeedId = null;  // M4c: non-radio enqueue clears the radio refresh state
  // #415: a fresh queue resets the system-playlist source. Set only
  // when seeded from a system playlist (server already returned the
  // rotation-aware order, so no client shuffle in that path).
  _queueSource = opts.source ?? null;
+  // #968: a fresh play replaces the self-heal closure + resets its budget.
+  _queueRefetch = opts.refetch ?? null;
+  _selfHealAttempts = 0;
  if (opts.shuffle && tracks.length > 1) {
    // Fisher-Yates over the whole list. startIndex is ignored — the
    // caller is asking for "random play from this pool," so the first
@@ -142,6 +166,7 @@ export function playQueue(
  _position = 0;
  _duration = 0;
  _error = null;
+  _failureStreak = 0;
 }

 export function togglePlay(): void {
@@ -263,6 +288,8 @@ export function reportStateFromAudio(
    case 'playing':
      _state = 'playing';
      _error = null;
+      _failureStreak = 0;
+      _selfHealAttempts = 0;
      return;
    case 'paused':
      _state = 'paused';
@@ -271,8 +298,7 @@ export function reportStateFromAudio(
      _state = 'loading';
      return;
    case 'error':
-      _state = 'error';
-      _error = detail ?? 'Playback failed.';
+      handleLoadFailure(detail);
      return;
    case 'ended':
      if (_repeat === 'one') {
@@ -301,6 +327,68 @@ export function reportStateFromAudio(
  }
 }

+// Track B (#968): a single failed track must not strand the player on the
+// "Try again" dead-end. Advance past it; only surface the error once the
+// whole queue has proven unplayable — every track failed, or we reached the
+// end with nothing playable. The streak cap (vs queue length) stops a
+// fully-broken queue from cycling forever instead of settling.
+function handleLoadFailure(detail?: string): void {
+  _failureStreak++;
+  if (_failureStreak < _queue.length && _index + 1 < _queue.length) {
+    _index++;
+    _position = 0;
+    _duration = 0;
+    _state = 'loading';
+    _error = null;
+    return;
+  }
+  // Whole queue is unplayable. If it came from a refreshable source, the
+  // snapshot is probably stale — re-pull it and resume before giving up.
+  if (trySelfHeal()) return;
+  _state = 'error';
+  _error = detail ?? 'Playback failed.';
+}
+
+// #968: re-pull a stale refreshable queue. Returns true if a self-heal was
+// started (caller must not dead-end). Bounded to one attempt per exhaustion
+// (reset on the next successful play) so a still-broken refresh can't loop.
+function trySelfHeal(): boolean {
+  if (_selfHealInFlight) return true;
+  if (_queueRefetch === null) return false;
+  if (_selfHealAttempts >= MAX_SELF_HEAL_ATTEMPTS) return false;
+  _selfHealAttempts++;
+  _selfHealInFlight = true;
+  _state = 'loading';
+  _error = null;
+  const refetch = _queueRefetch;
+  void refetch()
+    .then((refs) => {
+      if (refs.length > 0) {
+        // Re-seed in place — keep _queueSource / _queueRefetch so the new
+        // snapshot can itself self-heal, and don't reset _selfHealAttempts
+        // (only a successful 'playing' clears the budget).
+        _queue = refs;
+        _index = 0;
+        _position = 0;
+        _duration = 0;
+        _failureStreak = 0;
+        _state = 'loading';
+        _error = null;
+      } else {
+        _state = 'error';
+        _error = 'Nothing playable in this mix right now.';
+      }
+    })
+    .catch(() => {
+      _state = 'error';
+      _error = 'Couldn’t refresh this mix. Try again.';
+    })
+    .finally(() => {
+      _selfHealInFlight = false;
+    });
+  return true;
+}
+
 export function enqueueTrack(t: TrackRef): void {
  _radioSeedId = null;  // M4c
  _queue = [..._queue, t];
@@ -345,12 +433,19 @@ export function playNextMany(ts: TrackRef[]): void {
  _queue = [..._queue.slice(0, next), ...ts, ..._queue.slice(next)];
 }

-export async function playRadio(seedTrackId: string): Promise<void> {
+async function fetchRadioTracks(seedTrackId: string): Promise<TrackRef[]> {
  const resp = await api.get<RadioResponse>(
    `/api/radio?seed_track=${encodeURIComponent(seedTrackId)}`
  );
-  if (resp.tracks.length === 0) return;
-  playQueue(resp.tracks, 0);
+  return resp.tracks;
+}
+
+export async function playRadio(seedTrackId: string): Promise<void> {
+  const tracks = await fetchRadioTracks(seedTrackId);
+  if (tracks.length === 0) return;
+  // #968: hand the player a self-heal closure so a fully-stale radio queue
+  // re-seeds from the same track instead of dead-ending.
+  playQueue(tracks, 0, { refetch: () => fetchRadioTracks(seedTrackId) });
  _radioSeedId = seedTrackId;  // M4c: set AFTER playQueue (which clears it)
 }

@@ -288,6 +288,50 @@ describe('player store — shuffle + repeat + audio reports', () => {
    expect(player.state).toBe('error');
    expect(player.error).toBe('network lost');
  });
+
+  test('reportStateFromAudio("error") auto-advances past a bad track', () => {
+    playQueue([track('1'), track('2'), track('3')]);
+    reportStateFromAudio('error', 'boom');
+    expect(player.index).toBe(1);
+    expect(player.state).toBe('loading');
+    expect(player.error).toBeNull();
+  });
+
+  test('reportStateFromAudio("error") dead-ends once the whole queue is unplayable', () => {
+    playQueue([track('1'), track('2')]);
+    reportStateFromAudio('error', 'boom'); // track 1 fails → skip to track 2
+    expect(player.index).toBe(1);
+    expect(player.state).toBe('loading');
+    reportStateFromAudio('error', 'boom'); // track 2 also fails → exhausted
+    expect(player.state).toBe('error');
+    expect(player.error).toBe('boom');
+  });
+
+  test('reportStateFromAudio("error") self-heals a refreshable queue on total failure', async () => {
+    const fresh = [track('a'), track('b')];
+    const refetch = vi.fn().mockResolvedValue(fresh);
+    playQueue([track('1')], 0, { source: 'for_you', refetch });
+    reportStateFromAudio('error', 'boom'); // sole track fails → exhausted → self-heal
+    expect(refetch).toHaveBeenCalledOnce();
+    expect(player.state).toBe('loading');
+    await Promise.resolve();
+    await Promise.resolve();
+    await Promise.resolve();
+    expect(player.queue.map((t) => t.id)).toEqual(['a', 'b']);
+    expect(player.index).toBe(0);
+  });
+
+  test('self-heal fires at most once per exhaustion, then dead-ends', async () => {
+    const refetch = vi.fn().mockResolvedValue([track('x')]);
+    playQueue([track('1')], 0, { source: 'for_you', refetch });
+    reportStateFromAudio('error', 'boom'); // exhausted → self-heal #1
+    await Promise.resolve();
+    await Promise.resolve();
+    await Promise.resolve();
+    reportStateFromAudio('error', 'boom'); // re-pulled track also fails; budget spent → error
+    expect(player.state).toBe('error');
+    expect(refetch).toHaveBeenCalledOnce();
+  });
 });

 import {
@@ -0,0 +1,33 @@
+import type { TrackRef, PlaylistDetail } from '$lib/api/types';
+import { systemShuffle, getPlaylist } from '$lib/api/playlists';
+import { playlistTrackToRef } from './playlistTrackToRef';
+
+// #968: builds the self-heal closure for a system-playlist queue. On total
+// playback failure (every queued track unplayable — typically a stale tab
+// left open across the daily rebuild) the player calls this to re-pull the
+// current snapshot and resume.
+//
+// Single-instance variants (for_you, discover, deep_cuts, …) re-pull by
+// variant via the rotation-aware shuffle endpoint. Per-artist mixes
+// (songs_like_artist — one playlist per seed artist) can't be addressed by
+// variant alone, so they re-pull by playlist id. Mirrors the play routing
+// in PlaylistCard.
+
+function toRefs(detail: PlaylistDetail): TrackRef[] {
+  return detail.tracks
+    .map((r) => playlistTrackToRef(r))
+    .filter((t): t is TrackRef => t !== null);
+}
+
+export function systemPlaylistRefetch(opts: {
+  variant: string;
+  playlistId: string;
+  perArtist: boolean;
+}): () => Promise<TrackRef[]> {
+  return async () => {
+    const detail = opts.perArtist
+      ? await getPlaylist(opts.playlistId)
+      : await systemShuffle(opts.variant);
+    return toRefs(detail);
+  };
+}
--- a/Show More
+++ b/Show More