fix(music): keep now playing state current

close #1600

lib/media/media_item.dart

@@ -526,6 +526,10 @@ sealed class MediaItem with _$MediaItem {
     _ => null,
   };
 
+  /// Release year for music items. Track mappers normalize the containing
+  /// album's year into [year] when the backend exposes it as parent metadata.
+  int? get albumYear => kind == MediaKind.track || kind == MediaKind.album ? year : null;
+
   /// Album-artist name for music items: a track's grandparent, an album's
   /// parent.
   String? get albumArtistTitle => switch (kind) {

lib/screens/music/artist_detail_screen.dart

@@ -82,15 +82,18 @@ class _ArtistDetailScreenState extends BaseMediaListDetailScreen<ArtistDetailScr
   /// gated on playback availability first so the stub never fetches.
   Future<void> _playAll({bool shuffle = false}) async {
     if (!ensureMusicPlaybackAvailable(context)) return;
+    final service = context.read<MusicPlaybackService>();
+    final intent = service.beginPlayIntent();
     List<MediaItem> tracks;
     try {
       tracks = await mediaClient.fetchPlayableDescendants(widget.artist.id);
     } catch (e, stackTrace) {
+      if (!mounted || !service.isPlayIntentCurrent(intent)) return;
       final message = localizedLoadErrorMessage(e, stackTrace, context: widget.artist.displayTitle);
-      if (mounted) showErrorSnackBar(context, message);
+      showErrorSnackBar(context, message);
       return;
     }
-    if (!mounted) return;
+    if (!mounted || !service.isPlayIntentCurrent(intent)) return;
     if (tracks.isEmpty) {
       showAppSnackBar(context, emptyMessage);
       return;

lib/screens/music/now_playing_screen.dart

@@ -81,10 +81,7 @@ class _NowPlayingScreenState extends State<NowPlayingScreen>
   /// ValueListenableBuilder-wrapped Transform so drag frames never rebuild
   /// the screen.
   final ValueNotifier<double> _dismissDrag = ValueNotifier<double>(0);
-  late final AnimationController _dismissSettle = AnimationController(
+  late final AnimationController _dismissSettle;
-    vsync: this,
-    duration: const Duration(milliseconds: 200),
-  )..addListener(_onDismissSettleTick);
   double _dismissSettleFrom = 0;
 
   final FocusNode _seekFocusNode = FocusNode(debugLabel: 'now_playing_seek');
@@ -95,6 +92,13 @@ class _NowPlayingScreenState extends State<NowPlayingScreen>
 
   bool _poppedForIdle = false;
 
+  @override
+  void initState() {
+    super.initState();
+    _dismissSettle = AnimationController(vsync: this, duration: const Duration(milliseconds: 200))
+      ..addListener(_onDismissSettleTick);
+  }
+
   @override
   void didChangeDependencies() {
     super.didChangeDependencies();
@@ -306,7 +310,7 @@ class _NowPlayingScreenState extends State<NowPlayingScreen>
   Widget _buildPortraitLayout(MusicPlaybackService service, MediaItem track, MediaServerClient? client) {
     Widget upper = Column(
       children: [
-        _buildTopBar(track, service.playContext?.title),
+        _buildTopBar(track, service.playContext),
         Expanded(
           child: Padding(
             padding: const EdgeInsets.symmetric(horizontal: 24, vertical: 8),
@@ -332,7 +336,7 @@ class _NowPlayingScreenState extends State<NowPlayingScreen>
     return Column(
       children: [
         Expanded(child: upper),
-        Padding(padding: const EdgeInsets.fromLTRB(16, 8, 16, 0), child: _buildSeekBar()),
+        Padding(padding: const EdgeInsets.fromLTRB(16, 8, 16, 0), child: _buildSeekBar(track)),
         _buildTransportRow(service),
         _buildUtilityRow(showQueueButton: true),
         const SizedBox(height: 8),
@@ -344,7 +348,7 @@ class _NowPlayingScreenState extends State<NowPlayingScreen>
     final tk = tokens(context);
     return Column(
       children: [
-        _buildTopBar(track, service.playContext?.title),
+        _buildTopBar(track, service.playContext),
         Expanded(
           child: Padding(
             padding: const EdgeInsets.fromLTRB(24, 0, 24, 20),
@@ -360,7 +364,7 @@ class _NowPlayingScreenState extends State<NowPlayingScreen>
                     children: [
                       _buildTrackInfo(track, centered: false),
                       const SizedBox(height: 8),
-                      _buildSeekBar(),
+                      _buildSeekBar(track),
                       _buildWideControlBand(service),
                       const SizedBox(height: 12),
                       // Inline queue panel — same widget the queue sheet uses.
@@ -386,7 +390,7 @@ class _NowPlayingScreenState extends State<NowPlayingScreen>
   Widget _buildTvLayout(MusicPlaybackService service, MediaItem track, MediaServerClient? client) {
     final tk = tokens(context);
     final textTheme = Theme.of(context).textTheme;
-    final playContextTitle = service.playContext?.title;
+    final sourceTitle = _playingFromTitle(track, service.playContext);
     final artist = track.trackArtistTitle;
 
     return Padding(
@@ -404,10 +408,10 @@ class _NowPlayingScreenState extends State<NowPlayingScreen>
                 Row(
                   children: [
                     Expanded(
-                      child: playContextTitle == null || playContextTitle.isEmpty
+                      child: sourceTitle == null
                           ? const SizedBox.shrink()
                           : Text(
-                              t.music.playingFrom(title: playContextTitle),
+                              t.music.playingFrom(title: sourceTitle),
                               maxLines: 1,
                               overflow: .ellipsis,
                               style: TextStyle(fontSize: 14, color: tk.textMuted),
@@ -433,7 +437,7 @@ class _NowPlayingScreenState extends State<NowPlayingScreen>
                   ),
                 ],
                 const SizedBox(height: 28),
-                _buildSeekBar(),
+                _buildSeekBar(track),
                 const SizedBox(height: 8),
                 _buildTransportRow(service),
                 _buildUtilityRow(showQueueButton: true),
@@ -449,11 +453,12 @@ class _NowPlayingScreenState extends State<NowPlayingScreen>
   // Pieces
   // -------------------------------------------------------------------
 
-  /// [playContextTitle] is passed in (not selected) because this builds
+  /// [playContext] is passed in (not selected) because this builds
   /// inside the layout-phase LayoutBuilder, where `context.select` on the
   /// screen's element asserts; the screen already watches the service.
-  Widget _buildTopBar(MediaItem track, String? playContextTitle) {
+  Widget _buildTopBar(MediaItem track, MusicPlayContext? playContext) {
     final tk = tokens(context);
+    final sourceTitle = _playingFromTitle(track, playContext);
     // macOS pins the traffic lights at y=21 (16pt buttons → center 29, see
     // WindowUtilsPlugin.customButtonPositions); a fixed 58px row centers the
     // close button on that line regardless of the platform visual density
@@ -479,10 +484,10 @@ class _NowPlayingScreenState extends State<NowPlayingScreen>
               context: context,
             )!,
             Expanded(
-              child: playContextTitle == null || playContextTitle.isEmpty
+              child: sourceTitle == null
                   ? const SizedBox.shrink()
                   : Text(
-                      t.music.playingFrom(title: playContextTitle),
+                      t.music.playingFrom(title: sourceTitle),
                       textAlign: TextAlign.center,
                       maxLines: 1,
                       overflow: .ellipsis,
@@ -496,6 +501,19 @@ class _NowPlayingScreenState extends State<NowPlayingScreen>
     );
   }
 
+  /// Album and ad-hoc queues follow the active track's album as the queue
+  /// crosses album boundaries. Artist/playlist/mix contexts remain stable
+  /// provenance labels for the session they created.
+  String? _playingFromTitle(MediaItem track, MusicPlayContext? playContext) {
+    final followsCurrentAlbum =
+        playContext == null ||
+        playContext.kind == MusicPlayContextKind.album ||
+        playContext.kind == MusicPlayContextKind.tracks;
+    final title = (followsCurrentAlbum ? track.albumTitle : playContext.title)?.trim();
+    if (title == null || title.isEmpty) return null;
+    return toBulletedString([title, if (followsCurrentAlbum && track.albumYear != null) '${track.albumYear}']);
+  }
+
   /// Wide-layout control band: the transport row stays exactly centered
   /// (equal-width flanks), with lyrics + a desktop volume slider as a
   /// right-aligned cluster that scales down instead of overflowing when the
@@ -670,8 +688,9 @@ class _NowPlayingScreenState extends State<NowPlayingScreen>
     );
   }
 
-  Widget _buildSeekBar() {
+  Widget _buildSeekBar(MediaItem track) {
     return _NowPlayingSeekBar(
+      trackKey: track.globalKey,
       focusNode: _seekFocusNode,
       onNavigateUp: PlatformDetector.isTV() ? _overflowFocusNode.requestFocus : null,
       onNavigateDown: _focusTransport,
@@ -980,12 +999,14 @@ class _PlayPauseButton extends StatelessWidget {
 /// timeline's stepped key-repeat acceleration; focus renders as a
 /// text-based background pill behind the bar.
 class _NowPlayingSeekBar extends StatefulWidget {
+  final String trackKey;
   final FocusNode focusNode;
   final VoidCallback? onNavigateUp;
   final VoidCallback? onNavigateDown;
   final VoidCallback onBack;
 
   const _NowPlayingSeekBar({
+    required this.trackKey,
     required this.focusNode,
     required this.onNavigateUp,
     required this.onNavigateDown,
@@ -1012,13 +1033,27 @@ class _NowPlayingSeekBarState extends State<_NowPlayingSeekBar> {
     _keySeek = DebouncedSeekAccumulator(
       currentPosition: () => context.read<MusicPlaybackService>().position,
       duration: () => context.read<MusicPlaybackService>().duration ?? Duration.zero,
-      seek: (target) => unawaited(context.read<MusicPlaybackService>().seek(target)),
+      seek: (target) {
+        final service = context.read<MusicPlaybackService>();
+        if (service.currentTrack?.globalKey == widget.trackKey) {
+          unawaited(service.seek(target));
+        }
+      },
       onChanged: () {
         if (mounted) setState(() {});
       },
     );
   }
 
+  @override
+  void didUpdateWidget(covariant _NowPlayingSeekBar oldWidget) {
+    super.didUpdateWidget(oldWidget);
+    if (oldWidget.trackKey == widget.trackKey) return;
+    _keySeek.cancel();
+    _dragValueMs = null;
+    _resetSeekState();
+  }
+
   @override
   void dispose() {
     _keySeek.dispose();
@@ -1082,6 +1117,7 @@ class _NowPlayingSeekBarState extends State<_NowPlayingSeekBar> {
     final showFocus = _focused && InputModeTracker.isKeyboardMode(context);
 
     final bar = StreamBuilder<Duration>(
+      key: ValueKey(widget.trackKey),
       stream: service.positionStream,
       builder: (context, snapshot) {
         final duration = service.duration ?? Duration.zero;
@@ -1120,7 +1156,9 @@ class _NowPlayingSeekBarState extends State<_NowPlayingSeekBar> {
                 onChanged: hasDuration ? (value) => setState(() => _dragValueMs = value) : null,
                 onChangeEnd: hasDuration
                     ? (value) {
-                        unawaited(service.seek(Duration(milliseconds: value.round())));
+                        if (service.currentTrack?.globalKey == widget.trackKey) {
+                          unawaited(service.seek(Duration(milliseconds: value.round())));
+                        }
                         setState(() => _dragValueMs = null);
                       }
                     : null,

lib/screens/playlist/playlist_detail_screen.dart

@@ -96,6 +96,8 @@ class _PlaylistDetailScreenState extends BaseMediaListDetailScreen<PlaylistDetai
       return;
     }
     if (!ensureMusicPlaybackAvailable(context)) return;
+    final service = context.read<MusicPlaybackService>();
+    final intent = service.beginPlayIntent();
     List<MediaItem> tracks;
     if (_isPlaylistFullyLoaded) {
       tracks = items;
@@ -103,12 +105,13 @@ class _PlaylistDetailScreenState extends BaseMediaListDetailScreen<PlaylistDetai
       try {
         tracks = await fetchAllPlaylistItems(mediaClient, widget.playlist.id);
       } catch (e, stackTrace) {
+        if (!mounted || !service.isPlayIntentCurrent(intent)) return;
         final message = localizedLoadErrorMessage(e, stackTrace, context: widget.playlist.title);
-        if (mounted) showErrorSnackBar(context, message);
+        showErrorSnackBar(context, message);
         return;
       }
-      if (!mounted) return;
     }
+    if (!mounted || !service.isPlayIntentCurrent(intent)) return;
     await playTracks(context, tracks: tracks, startTrack: startTrack, playContext: _musicPlayContext, shuffle: shuffle);
   }
 

lib/services/music/music_playback_service.dart

@@ -9,8 +9,9 @@ enum MusicRepeatMode { off, all, one }
 /// Coarse playback state of the music session.
 enum MusicPlaybackStatus { idle, loading, playing, paused, error }
 
-/// What kind of container playback was started from — drives the
+/// What kind of container playback was started from. The player keeps
-/// "Playing from …" line in the player UI.
+/// artist/playlist/mix provenance stable, while album and ad-hoc queues use
+/// the active track's album for the "Playing from …" line.
 enum MusicPlayContextKind { album, artist, playlist, mix, tracks }
 
 /// Provenance of the current queue (album/artist/playlist/instant mix).
@@ -19,7 +20,8 @@ class MusicPlayContext {
   /// don't).
   final String? id;
 
-  /// Display title ("Playing from {title}").
+  /// Display title of the session source. Used directly for stable
+  /// artist/playlist/mix provenance labels.
   final String title;
 
   final MusicPlayContextKind kind;
@@ -65,6 +67,18 @@ abstract class MusicPlaybackService extends ChangeNotifier {
   /// handles recovery (skip / stop) itself.
   Stream<Object> get errors;
 
+  /// Claims the latest user intent to replace playback after asynchronous
+  /// queue construction. Callers must check [isPlayIntentCurrent] before
+  /// committing fetched tracks.
+  int beginPlayIntent();
+
+  /// Whether [intent] is still the latest playback-replacement request.
+  bool isPlayIntentCurrent(int intent);
+
+  /// Changes whenever a queue session starts or stops. Asynchronous enqueue
+  /// actions use this to avoid appending fetched tracks to a newer session.
+  int get queueSessionRevision;
+
   /// Start a new queue from [tracks], optionally at [startTrack] (defaults
   /// to the first track). [shuffle] shuffles with the start track anchored
   /// first.
@@ -146,6 +160,8 @@ abstract class MusicPlaybackService extends ChangeNotifier {
 /// null-safe without per-call-site feature checks.
 class StubMusicPlaybackService extends MusicPlaybackService {
   final ValueNotifier<double> _volumeNotifier = ValueNotifier<double>(100);
+  int _playIntentGeneration = 0;
+  int _queueSessionRevision = 0;
   @override
   bool get isAvailable => false;
 
@@ -182,13 +198,25 @@ class StubMusicPlaybackService extends MusicPlaybackService {
   @override
   Stream<Object> get errors => const Stream.empty();
 
+  @override
+  int beginPlayIntent() => ++_playIntentGeneration;
+
+  @override
+  bool isPlayIntentCurrent(int intent) => intent == _playIntentGeneration;
+
+  @override
+  int get queueSessionRevision => _queueSessionRevision;
+
   @override
   Future<void> playFromList({
     required List<MediaItem> tracks,
     MediaItem? startTrack,
     required MusicPlayContext playContext,
     bool shuffle = false,
-  }) async {}
+  }) async {
+    beginPlayIntent();
+    _queueSessionRevision++;
+  }
 
   @override
   Future<void> playInstantMix(MediaItem seed) async {}
@@ -244,7 +272,10 @@ class StubMusicPlaybackService extends MusicPlaybackService {
   void clearUpcoming() {}
 
   @override
-  Future<void> stop() async {}
+  Future<void> stop() async {
+    beginPlayIntent();
+    _queueSessionRevision++;
+  }
 
   @override
   bool get sleepTimerActive => false;

lib/services/music/music_playback_service_impl.dart

@@ -137,6 +137,20 @@ class MusicPlaybackServiceImpl extends MusicPlaybackService with WidgetsBindingO
   /// (resolves, opens, arms) drop out instead of acting on the new state.
   int _generation = 0;
 
+  /// Queue construction can involve a server round-trip before playback is
+  /// replaced. Only the latest explicit play intent may commit its result.
+  int _playIntentGeneration = 0;
+
+  /// Identifies the queue session that asynchronous enqueue work belongs to.
+  int _queueSessionRevision = 0;
+
+  /// Gapless arm work is serialized, and each requested recomputation gets
+  /// a revision. This prevents an older resolve/setNext continuation from
+  /// landing after a queue edit, repeat change, or sleep-timer change.
+  int _armRequestGeneration = 0;
+  int _processedArmRequestGeneration = 0;
+  Future<void>? _armDrain;
+
   int _consecutiveFailures = 0;
   bool _resumeAfterInterruption = false;
   bool _disposed = false;
@@ -208,6 +222,15 @@ class MusicPlaybackServiceImpl extends MusicPlaybackService with WidgetsBindingO
   @override
   bool get sleepTimerEndOfTrack => _sleepTimerEndOfTrack;
 
+  @override
+  int beginPlayIntent() => ++_playIntentGeneration;
+
+  @override
+  bool isPlayIntentCurrent(int intent) => !_disposed && intent == _playIntentGeneration;
+
+  @override
+  int get queueSessionRevision => _queueSessionRevision;
+
   // ---------------------------------------------------------------------
   // Session start
   // ---------------------------------------------------------------------
@@ -219,25 +242,30 @@ class MusicPlaybackServiceImpl extends MusicPlaybackService with WidgetsBindingO
     required MusicPlayContext playContext,
     bool shuffle = false,
   }) {
+    beginPlayIntent();
     return _startQueue(tracks: tracks, startTrack: startTrack, playContext: playContext, shuffle: shuffle);
   }
 
   @override
   Future<void> playInstantMix(MediaItem seed) async {
+    final intent = beginPlayIntent();
     final client = _clientFor(seed);
     if (client == null) {
-      _errorsController.add(StateError('No server available for instant mix'));
+      if (isPlayIntentCurrent(intent)) {
+        _errorsController.add(StateError('No server available for instant mix'));
+      }
       return;
     }
     List<MediaItem> tracks;
     try {
       tracks = await client.fetchInstantMix(seed.id);
     } catch (e, st) {
+      if (!isPlayIntentCurrent(intent)) return;
       appLogger.w('Instant mix fetch failed for ${seed.id}', error: e, stackTrace: st);
       _errorsController.add(e);
       return;
     }
-    if (_disposed || tracks.isEmpty) return;
+    if (!isPlayIntentCurrent(intent) || tracks.isEmpty) return;
     await _startQueue(
       tracks: tracks,
       playContext: MusicPlayContext(title: seed.displayTitle, kind: MusicPlayContextKind.mix),
@@ -252,11 +280,14 @@ class MusicPlaybackServiceImpl extends MusicPlaybackService with WidgetsBindingO
     bool autoplay = true,
   }) async {
     if (tracks.isEmpty || _disposed) return;
+    beginPlayIntent();
+    _queueSessionRevision++;
     // Android 13+: the background playback notification needs
     // POST_NOTIFICATIONS. Fire-and-forget — playback and the foreground
     // service run regardless; a denial only hides the notification.
     unawaited(ensureNotificationPermission());
     final generation = ++_generation;
+    _invalidateArmRequests();
     _finalizeCurrentTrack();
     var startIndex = 0;
     if (startTrack != null) {
@@ -333,13 +364,14 @@ class MusicPlaybackServiceImpl extends MusicPlaybackService with WidgetsBindingO
 
     _setStatus(play ? MusicPlaybackStatus.playing : MusicPlaybackStatus.paused);
     _bindTrackServices(track, source);
-    unawaited(_armNext(generation));
+    _requestArmNext();
   }
 
   /// Manual advance: finalize the current tracker at its current position and
   /// open the queue entry at [cursor].
   Future<void> _advanceTo(int cursor, {bool play = true}) async {
     final generation = ++_generation;
+    _invalidateArmRequests();
     _finalizeCurrentTrack();
     _queue.jumpTo(cursor);
     await _openCurrent(generation, play: play);
@@ -348,9 +380,9 @@ class MusicPlaybackServiceImpl extends MusicPlaybackService with WidgetsBindingO
   /// Arm (or clear) what the backend should auto-advance into. Skips the
   /// resolve round-trip when the desired target is already armed; repeat-one
   /// reuses the current track's resolved source.
-  Future<void> _armNext(int generation) async {
+  Future<void> _applyArmNext(int generation, int armRequest) async {
     final player = _player;
-    if (player == null || generation != _generation) return;
+    if (player == null || !_isCurrentArmRequest(player, generation, armRequest)) return;
 
     final targetCursor = _sleepTimerEndOfTrack ? null : _queue.nextIndex();
     final target = targetCursor == null ? null : _queue.trackAt(targetCursor);
@@ -366,7 +398,7 @@ class MusicPlaybackServiceImpl extends MusicPlaybackService with WidgetsBindingO
 
     _rememberStaleArm();
     await _trySetNext(player, null);
-    if (generation != _generation || _player != player) return;
+    if (!_isCurrentArmRequest(player, generation, armRequest)) return;
 
     MusicSource source;
     if (targetCursor == _queue.cursor && _currentSource != null) {
@@ -382,11 +414,12 @@ class MusicPlaybackServiceImpl extends MusicPlaybackService with WidgetsBindingO
         return;
       }
     }
-    if (generation != _generation || _player != player) return;
+    if (!_isCurrentArmRequest(player, generation, armRequest)) return;
-    _armed = _ArmedTrack(track: target, source: source);
+    final armed = _ArmedTrack(track: target, source: source);
+    _armed = armed;
     appLogger.d('Music: arming cursor $targetCursor "${target.title}"');
     final ok = await _trySetNext(player, Media(source.url, headers: source.headers));
-    if (!ok && generation == _generation && _player == player) {
+    if (!ok && identical(_armed, armed)) {
       // Nothing is armed natively; clear the record so the confirmed
       // completed fallback can advance explicitly instead of waiting for a
       // transition that can never come.
@@ -394,6 +427,45 @@ class MusicPlaybackServiceImpl extends MusicPlaybackService with WidgetsBindingO
     }
   }
 
+  bool _isCurrentArmRequest(Player player, int generation, int armRequest) {
+    return !_disposed && generation == _generation && armRequest == _armRequestGeneration && _player == player;
+  }
+
+  void _requestArmNext() {
+    if (_disposed) return;
+    _armRequestGeneration++;
+    _ensureArmDrain();
+  }
+
+  void _invalidateArmRequests() {
+    _armRequestGeneration++;
+  }
+
+  void _ensureArmDrain() {
+    if (_disposed || _armDrain != null) return;
+    final drain = _drainArmRequests();
+    _armDrain = drain;
+    unawaited(
+      drain.whenComplete(() {
+        if (_armDrain != drain) return;
+        _armDrain = null;
+        if (!_disposed && _processedArmRequestGeneration != _armRequestGeneration) {
+          _ensureArmDrain();
+        }
+      }),
+    );
+  }
+
+  Future<void> _drainArmRequests() async {
+    while (!_disposed) {
+      final armRequest = _armRequestGeneration;
+      final generation = _generation;
+      await _applyArmNext(generation, armRequest);
+      _processedArmRequestGeneration = armRequest;
+      if (armRequest == _armRequestGeneration) return;
+    }
+  }
+
   /// Un-arm bookkeeping: [_armed] is cleared but remembered so
   /// [_onTrackTransition] can adopt a transition that raced the clear.
   void _rememberStaleArm() {
@@ -418,11 +490,7 @@ class MusicPlaybackServiceImpl extends MusicPlaybackService with WidgetsBindingO
   /// edits that keep the same next track cost no server round-trip.
   void _rearmIfNeeded() {
     if (_player == null || _currentTrack == null) return;
-    final targetCursor = _sleepTimerEndOfTrack ? null : _queue.nextIndex();
+    _requestArmNext();
-    final target = targetCursor == null ? null : _queue.trackAt(targetCursor);
-    if (target == null && _armed == null) return;
-    if (target != null && _armed?.track.globalKey == target.globalKey) return;
-    unawaited(_armNext(_generation));
   }
 
   // ---------------------------------------------------------------------
@@ -501,7 +569,8 @@ class MusicPlaybackServiceImpl extends MusicPlaybackService with WidgetsBindingO
     }
     final adopted = armed;
     _armed = null;
-    final generation = ++_generation;
+    _generation++;
+    _invalidateArmRequests();
 
     // The finished track played out fully — report stopped at its duration.
     final finishedMs = _currentTrack?.durationMs;
@@ -537,7 +606,7 @@ class MusicPlaybackServiceImpl extends MusicPlaybackService with WidgetsBindingO
     appLogger.d('Music: transition received "${adopted.track.title}" → cursor ${_queue.cursor}');
     _setStatus(MusicPlaybackStatus.playing, forceNotify: true);
     _bindTrackServices(_currentTrack!, adopted.source);
-    unawaited(_armNext(generation));
+    _requestArmNext();
   }
 
   /// Completed (eof-reached) is NOT a last-entry-only signal: mpv pulses it
@@ -591,6 +660,7 @@ class MusicPlaybackServiceImpl extends MusicPlaybackService with WidgetsBindingO
   /// remains; pressing play restarts the current track from the top.
   void _parkAtEnd() {
     _generation++;
+    _invalidateArmRequests();
     final finishedMs = _currentTrack?.durationMs;
     _finalizeCurrentTrack(positionOverride: finishedMs != null ? Duration(milliseconds: finishedMs) : null);
     _setStatus(MusicPlaybackStatus.paused, forceNotify: true);
@@ -778,28 +848,37 @@ class MusicPlaybackServiceImpl extends MusicPlaybackService with WidgetsBindingO
   Future<void> play() async {
     final player = _player;
     if (player == null || _currentTrack == null) return;
+    final generation = _generation;
     if (player.state.completed) {
       // Parked at queue end: restart the current track.
       await player.seek(Duration.zero);
+      if (!_isCurrentTransport(player, generation)) return;
       final currentTrack = _currentTrack;
       final currentSource = _currentSource;
       if (currentTrack != null && currentSource != null) {
         _bindTrackServices(currentTrack, currentSource);
       }
-      unawaited(_armNext(_generation));
+      _requestArmNext();
     }
     await player.play();
+    if (!_isCurrentTransport(player, generation)) return;
     _setStatus(MusicPlaybackStatus.playing);
   }
 
   @override
   Future<void> pause() async {
     final player = _player;
-    if (player == null) return;
+    if (player == null || _currentTrack == null) return;
+    final generation = _generation;
     await player.pause();
+    if (!_isCurrentTransport(player, generation)) return;
     _setStatus(MusicPlaybackStatus.paused);
   }
 
+  bool _isCurrentTransport(Player player, int generation) {
+    return !_disposed && _currentTrack != null && generation == _generation && _player == player;
+  }
+
   @override
   Future<void> togglePlayPause() {
     final player = _player;
@@ -1031,7 +1110,7 @@ class MusicPlaybackServiceImpl extends MusicPlaybackService with WidgetsBindingO
     // End-of-track mode suppresses gapless arming (and leaving it restores
     // the arm), so the track genuinely completes instead of transitioning.
     if (hadEndOfTrack != _sleepTimerEndOfTrack) {
-      unawaited(_armNext(_generation));
+      _requestArmNext();
     }
     notifyListeners();
   }
@@ -1064,7 +1143,10 @@ class MusicPlaybackServiceImpl extends MusicPlaybackService with WidgetsBindingO
   Future<void> _stopForVideoClaim() => _stopSession(endStatus: MusicPlaybackStatus.idle);
 
   Future<void> _stopSession({required MusicPlaybackStatus endStatus}) async {
+    beginPlayIntent();
+    _queueSessionRevision++;
     _generation++;
+    _invalidateArmRequests();
     _completedConfirmTimer?.cancel();
     _completedConfirmTimer = null;
     _cancelSleepTimer();
@@ -1076,6 +1158,7 @@ class MusicPlaybackServiceImpl extends MusicPlaybackService with WidgetsBindingO
     _staleArm = null;
     _playContext = null;
     _resumeAfterInterruption = false;
+    _setStatus(endStatus, forceNotify: true);
 
     final player = _player;
     _player = null;
@@ -1110,8 +1193,6 @@ class MusicPlaybackServiceImpl extends MusicPlaybackService with WidgetsBindingO
       unawaited(controls.clear());
       controls.dispose();
     }
-
-    _setStatus(endStatus, forceNotify: true);
   }
 
   @override
@@ -1137,6 +1218,10 @@ class MusicPlaybackServiceImpl extends MusicPlaybackService with WidgetsBindingO
   @override
   void dispose() {
     if (_disposed) return;
+    _playIntentGeneration++;
+    _queueSessionRevision++;
+    _generation++;
+    _invalidateArmRequests();
     _disposed = true;
     if (_observesLifecycle) {
       WidgetsBinding.instance.removeObserver(this);

lib/services/plex_mappers.dart

@@ -564,6 +564,8 @@ class PlexMetadataDto {
   final double? userRating;
   @JsonKey(fromJson: flexibleInt)
   final int? year;
+  @JsonKey(fromJson: flexibleInt)
+  final int? parentYear;
   final String? originallyAvailableAt;
   final String? thumb;
   final String? art;
@@ -666,6 +668,7 @@ class PlexMetadataDto {
     this.audienceRating,
     this.userRating,
     this.year,
+    this.parentYear,
     this.originallyAvailableAt,
     this.thumb,
     this.art,
@@ -793,6 +796,7 @@ class PlexMetadataDto {
     double? audienceRating,
     double? userRating,
     int? year,
+    int? parentYear,
     String? originallyAvailableAt,
     String? thumb,
     String? art,
@@ -862,6 +866,7 @@ class PlexMetadataDto {
       audienceRating: audienceRating ?? this.audienceRating,
       userRating: userRating ?? this.userRating,
       year: year ?? this.year,
+      parentYear: parentYear ?? this.parentYear,
       originallyAvailableAt: originallyAvailableAt ?? this.originallyAvailableAt,
       thumb: thumb ?? this.thumb,
       art: art ?? this.art,
@@ -961,9 +966,10 @@ class PlexMappers {
 
   /// Map a parsed [PlexMetadataDto] into a [PlexMediaItem].
   static PlexMediaItem mediaItem(PlexMetadataDto dto) {
+    final kind = MediaKind.fromString(dto.type);
     return PlexMediaItem(
       id: dto.ratingKey,
-      kind: MediaKind.fromString(dto.type),
+      kind: kind,
       guid: dto.guid,
       title: dto.title,
       titleSort: dto.titleSort,
@@ -972,7 +978,10 @@ class PlexMappers {
       originalTitle: dto.originalTitle,
       editionTitle: dto.editionTitle,
       studio: dto.studio,
-      year: dto.year,
+      // Plex stores an ordinary track's release year on the parent album.
+      // Normalize it into the neutral item's year, matching Jellyfin Audio
+      // rows, while leaving episode/season hierarchy semantics unchanged.
+      year: kind == MediaKind.track ? dto.year ?? dto.parentYear : dto.year,
       originallyAvailableAt: dto.originallyAvailableAt,
       contentRating: dto.contentRating,
       parentId: dto.parentRatingKey,

lib/services/plex_mappers.g.dart

@@ -93,6 +93,7 @@ PlexMetadataDto _$PlexMetadataDtoFromJson(Map<String, dynamic> json) =>
       audienceRating: flexibleDouble(json['audienceRating']),
       userRating: flexibleDouble(json['userRating']),
       year: flexibleInt(json['year']),
+      parentYear: flexibleInt(json['parentYear']),
       originallyAvailableAt: json['originallyAvailableAt'] as String?,
       thumb: json['thumb'] as String?,
       art: json['art'] as String?,
@@ -167,6 +168,7 @@ Map<String, dynamic> _$PlexMetadataDtoToJson(PlexMetadataDto instance) =>
       'audienceRating': ?instance.audienceRating,
       'userRating': ?instance.userRating,
       'year': ?instance.year,
+      'parentYear': ?instance.parentYear,
       'originallyAvailableAt': ?instance.originallyAvailableAt,
       'thumb': ?instance.thumb,
       'art': ?instance.art,

lib/utils/music_navigation.dart

@@ -123,6 +123,8 @@ Future<void> playTracks(
 /// album, isn't found in it, or the album fetch fails.
 Future<void> playTrackWithAlbumContext(BuildContext context, MediaItem track) async {
   if (!ensureMusicPlaybackAvailable(context)) return;
+  final service = context.read<MusicPlaybackService>();
+  final intent = service.beginPlayIntent();
 
   final albumId = track.parentId;
   final client = context.getMediaClientForItemOrNull(track);
@@ -130,7 +132,7 @@ Future<void> playTrackWithAlbumContext(BuildContext context, MediaItem track) as
     try {
       final tracks = await client.fetchAlbumTracks(albumId);
       final startIndex = tracks.indexWhere((item) => item.id == track.id);
-      if (!context.mounted) return;
+      if (!context.mounted || !service.isPlayIntentCurrent(intent)) return;
       if (startIndex != -1) {
         await playTracks(
           context,
@@ -141,11 +143,13 @@ Future<void> playTrackWithAlbumContext(BuildContext context, MediaItem track) as
         return;
       }
     } catch (e) {
+      if (!service.isPlayIntentCurrent(intent)) return;
       appLogger.w('Failed to fetch album context for track ${track.id}; playing single track', error: e);
       if (!context.mounted) return;
     }
   }
 
+  if (!context.mounted || !service.isPlayIntentCurrent(intent)) return;
   await playTracks(
     context,
     tracks: [track],

lib/widgets/media_context_menu.dart

@@ -1062,8 +1062,16 @@ class MediaContextMenuState extends State<MediaContextMenu> {
     // Availability gate before the container fetch so the stub costs no
     // server round-trip.
     if (!ensureMusicPlaybackAvailable(context)) return;
-    final tracks = await _musicTracksForItem(item);
+    final service = context.read<MusicPlaybackService>();
-    if (!context.mounted) return;
+    final intent = service.beginPlayIntent();
+    List<MediaItem> tracks;
+    try {
+      tracks = await _musicTracksForItem(item);
+    } catch (_) {
+      if (!service.isPlayIntentCurrent(intent)) return;
+      rethrow;
+    }
+    if (!context.mounted || !service.isPlayIntentCurrent(intent)) return;
     await playTracks(
       context,
       tracks: tracks,
@@ -1079,8 +1087,15 @@ class MediaContextMenuState extends State<MediaContextMenu> {
     final service = context.read<MusicPlaybackService?>();
     // Menu entries are hidden on the stub; defensive re-check.
     if (service == null || !service.isAvailable) return;
-    final tracks = await _musicTracksForItem(_mediaItem!);
+    final queueSessionRevision = service.queueSessionRevision;
-    if (tracks.isEmpty) return;
+    List<MediaItem> tracks;
+    try {
+      tracks = await _musicTracksForItem(_mediaItem!);
+    } catch (_) {
+      if (!context.mounted || service.queueSessionRevision != queueSessionRevision) return;
+      rethrow;
+    }
+    if (!context.mounted || service.queueSessionRevision != queueSessionRevision || tracks.isEmpty) return;
     if (playNext) {
       service.addNext(tracks);
     } else {
@@ -1383,18 +1398,19 @@ class MediaContextMenuState extends State<MediaContextMenu> {
     // Match PlaylistDetailScreen: fail the availability gate before paying
     // for a full playlist fetch, then hand the tracks to the music session.
     if (!ensureMusicPlaybackAvailable(context)) return;
+    final service = context.read<MusicPlaybackService>();
+    final intent = service.beginPlayIntent();
 
     List<MediaItem> tracks;
     try {
       tracks = await fetchAllPlaylistItems(_getMediaClientForItem(), playlist.id);
     } catch (e, st) {
+      if (!context.mounted || !service.isPlayIntentCurrent(intent)) return;
       appLogger.w('Failed to fetch audio playlist ${playlist.id}', error: e, stackTrace: st);
-      if (context.mounted) {
+      showErrorSnackBar(context, t.messages.errorLoading(error: e.toString()));
-        showErrorSnackBar(context, t.messages.errorLoading(error: e.toString()));
-      }
       return;
     }
-    if (!context.mounted) return;
+    if (!context.mounted || !service.isPlayIntentCurrent(intent)) return;
     if (tracks.isEmpty) {
       showErrorSnackBar(context, t.messages.failedToCreatePlayQueueNoItems);
       return;

lib/widgets/music/mini_player.dart

@@ -286,7 +286,7 @@ class _MiniPlayerCardState extends State<_MiniPlayerCard> with ContextMenuTapMix
           height: _MusicMiniPlayerOverlayState._cardHeight,
           child: Stack(
             children: [
-              const Positioned.fill(child: _MiniPlayerProgress()),
+              Positioned.fill(child: _MiniPlayerProgress(key: ValueKey(widget.track.globalKey))),
               Padding(
                 padding: const EdgeInsets.symmetric(horizontal: 8),
                 child: Row(
@@ -409,7 +409,7 @@ class _MiniPlayerCardState extends State<_MiniPlayerCard> with ContextMenuTapMix
 /// background layer, never the card content above it. The played fraction
 /// renders as a subtle full-height tint that fills the card left-to-right.
 class _MiniPlayerProgress extends StatelessWidget {
-  const _MiniPlayerProgress();
+  const _MiniPlayerProgress({super.key});
 
   @override
   Widget build(BuildContext context) {

test/media/media_item_test.dart

@@ -15,6 +15,7 @@ import '../test_helpers/media_items.dart';
 MediaItem _movie({
   String id = 'm1',
   String? title = 'Movie',
+  int? year,
   int? viewCount,
   int? leafCount,
   int? viewedLeafCount,
@@ -29,6 +30,7 @@ MediaItem _movie({
   backend: backend,
   kind: MediaKind.movie,
   title: title,
+  year: year,
   viewCount: viewCount,
   leafCount: leafCount,
   viewedLeafCount: viewedLeafCount,
@@ -446,4 +448,16 @@ void main() {
       expect(movie.displayTitle, '');
     });
   });
+
+  group('MediaItem music metadata', () {
+    test('album year is exposed only for tracks and albums', () {
+      final track = testMediaItem(kind: MediaKind.track, parentTitle: 'Album', year: 2001);
+      final album = testMediaItem(kind: MediaKind.album, title: 'Album', year: 2001);
+
+      expect(track.albumTitle, 'Album');
+      expect(track.albumYear, 2001);
+      expect(album.albumYear, 2001);
+      expect(_movie(year: 2001).albumYear, isNull);
+    });
+  });
 }

test/screens/music/now_playing_screen_test.dart

@@ -0,0 +1,226 @@
+import 'dart:async';
+
+import 'package:flutter/material.dart';
+import 'package:flutter/services.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:plezy/focus/input_mode_tracker.dart';
+import 'package:plezy/i18n/strings.g.dart';
+import 'package:plezy/media/media_backend.dart';
+import 'package:plezy/media/media_item.dart';
+import 'package:plezy/media/media_kind.dart';
+import 'package:plezy/providers/multi_server_provider.dart';
+import 'package:plezy/screens/music/now_playing_screen.dart';
+import 'package:plezy/services/data_aggregation_service.dart';
+import 'package:plezy/services/multi_server_manager.dart';
+import 'package:plezy/services/music/music_playback_service.dart';
+import 'package:plezy/theme/mono_theme.dart';
+import 'package:plezy/utils/platform_detector.dart';
+import 'package:provider/provider.dart';
+
+import '../../test_helpers/media_items.dart';
+
+MediaItem _track({required String id, required String title, required String album, required int year}) {
+  return testMediaItem(
+    id: id,
+    backend: MediaBackend.plex,
+    kind: MediaKind.track,
+    title: title,
+    parentId: 'album_$id',
+    parentTitle: album,
+    grandparentId: 'artist_$id',
+    grandparentTitle: 'Artist $id',
+    year: year,
+    durationMs: const Duration(minutes: 3).inMilliseconds,
+    serverId: 'server_1',
+  );
+}
+
+class _FakeMusicService extends StubMusicPlaybackService {
+  MediaItem track;
+  final MusicPlayContext context;
+  final StreamController<Duration> _positionController = StreamController<Duration>.broadcast(sync: true);
+  final List<Duration> seeks = [];
+  Duration _position = Duration.zero;
+
+  _FakeMusicService({required this.track, required this.context});
+
+  void advanceTo(MediaItem next) {
+    track = next;
+    _position = Duration.zero;
+    notifyListeners();
+  }
+
+  void emitPosition(Duration position) {
+    _position = position;
+    _positionController.add(position);
+  }
+
+  @override
+  bool get isAvailable => true;
+
+  @override
+  MediaItem get currentTrack => track;
+
+  @override
+  MusicPlaybackStatus get status => MusicPlaybackStatus.playing;
+
+  @override
+  Duration get position => _position;
+
+  @override
+  Stream<Duration> get positionStream => _positionController.stream;
+
+  @override
+  Duration get duration => const Duration(minutes: 3);
+
+  @override
+  List<MediaItem> get queue => [track];
+
+  @override
+  int get currentIndex => 0;
+
+  @override
+  MusicPlayContext get playContext => context;
+
+  @override
+  Future<void> seek(Duration position) async {
+    seeks.add(position);
+    _position = position;
+  }
+
+  @override
+  void dispose() {
+    _positionController.close();
+    super.dispose();
+  }
+}
+
+void main() {
+  TestWidgetsFlutterBinding.ensureInitialized();
+
+  setUp(() {
+    LocaleSettings.setLocaleSync(AppLocale.en);
+    TvDetectionService.debugSetAppleTVOverride(false);
+    PlatformDetector.debugSetIsDesktopOSOverride(null);
+  });
+
+  tearDown(() {
+    TvDetectionService.debugSetAppleTVOverride(null);
+    PlatformDetector.debugSetIsDesktopOSOverride(null);
+  });
+
+  Future<void> pumpNowPlaying(WidgetTester tester, _FakeMusicService service, {required bool isTv}) async {
+    tester.view.devicePixelRatio = 1;
+    tester.view.physicalSize = const Size(1200, 700);
+    addTearDown(tester.view.resetDevicePixelRatio);
+    addTearDown(tester.view.resetPhysicalSize);
+
+    TvDetectionService.debugSetAppleTVOverride(isTv);
+    PlatformDetector.debugSetIsDesktopOSOverride(!isTv);
+
+    final manager = MultiServerManager();
+    final multiServerProvider = MultiServerProvider(manager, DataAggregationService(manager));
+    addTearDown(service.dispose);
+    addTearDown(() {
+      multiServerProvider.dispose();
+      manager.dispose();
+    });
+
+    await tester.pumpWidget(
+      InputModeTracker(
+        child: TranslationProvider(
+          child: MultiProvider(
+            providers: [
+              ChangeNotifierProvider<MultiServerProvider>.value(value: multiServerProvider),
+              ChangeNotifierProvider<MusicPlaybackService>.value(value: service),
+            ],
+            child: MaterialApp(
+              theme: monoTheme(dark: true).copyWith(platform: isTv ? TargetPlatform.android : TargetPlatform.windows),
+              home: const NowPlayingScreen(),
+            ),
+          ),
+        ),
+      ),
+    );
+    await tester.pump();
+  }
+
+  for (final isTv in [false, true]) {
+    testWidgets('${isTv ? 'TV' : 'desktop'} follows the current album when an album queue crosses albums', (
+      tester,
+    ) async {
+      final first = _track(id: 'one', title: 'First Track', album: 'First Album', year: 1973);
+      final second = _track(id: 'two', title: 'Second Track', album: 'Second Album', year: 1999);
+      final service = _FakeMusicService(
+        track: first,
+        context: const MusicPlayContext(id: 'album_one', title: 'First Album', kind: MusicPlayContextKind.album),
+      );
+
+      await pumpNowPlaying(tester, service, isTv: isTv);
+
+      expect(find.text(t.music.playingFrom(title: 'First Album · 1973')), findsOneWidget);
+
+      service.advanceTo(second);
+      await tester.pump();
+
+      expect(find.text(t.music.playingFrom(title: 'First Album · 1973')), findsNothing);
+      expect(find.text(t.music.playingFrom(title: 'Second Album · 1999')), findsOneWidget);
+    });
+  }
+
+  testWidgets('playlist playback retains its queue provenance label', (tester) async {
+    final service = _FakeMusicService(
+      track: _track(id: 'one', title: 'First Track', album: 'First Album', year: 1973),
+      context: const MusicPlayContext(id: 'playlist_1', title: 'Road Trip', kind: MusicPlayContextKind.playlist),
+    );
+
+    await pumpNowPlaying(tester, service, isTv: false);
+
+    expect(find.text(t.music.playingFrom(title: 'Road Trip')), findsOneWidget);
+    expect(find.text(t.music.playingFrom(title: 'First Album · 1973')), findsNothing);
+  });
+
+  testWidgets('pending d-pad seek is discarded when the track changes', (tester) async {
+    final first = _track(id: 'one', title: 'First Track', album: 'First Album', year: 1973);
+    final second = _track(id: 'two', title: 'Second Track', album: 'Second Album', year: 1999);
+    final service = _FakeMusicService(
+      track: first,
+      context: const MusicPlayContext(title: 'Queue', kind: MusicPlayContextKind.tracks),
+    );
+
+    await pumpNowPlaying(tester, service, isTv: true);
+    await tester.sendKeyEvent(LogicalKeyboardKey.arrowUp);
+    await tester.pump();
+    await tester.sendKeyDownEvent(LogicalKeyboardKey.arrowRight);
+
+    service.advanceTo(second);
+    await tester.pump();
+    await tester.sendKeyUpEvent(LogicalKeyboardKey.arrowRight);
+    await tester.pump();
+
+    expect(service.seeks, isEmpty);
+  });
+
+  testWidgets('seek progress resets immediately when the track changes', (tester) async {
+    final first = _track(id: 'one', title: 'First Track', album: 'First Album', year: 1973);
+    final second = _track(id: 'two', title: 'Second Track', album: 'Second Album', year: 1999);
+    final service = _FakeMusicService(
+      track: first,
+      context: const MusicPlayContext(title: 'Queue', kind: MusicPlayContextKind.tracks),
+    );
+
+    await pumpNowPlaying(tester, service, isTv: false);
+    service.emitPosition(const Duration(minutes: 2));
+    await tester.pump();
+    Slider seekSlider() => tester
+        .widgetList<Slider>(find.byType(Slider))
+        .singleWhere((slider) => slider.max == const Duration(minutes: 3).inMilliseconds);
+
+    expect(seekSlider().value, 120000);
+
+    service.advanceTo(second);
+    await tester.pump();
+
+    expect(seekSlider().value, 0);
+  });
+}

test/services/jellyfin_music_mapper_test.dart

@@ -90,6 +90,7 @@ void main() {
       expect(item.trackNumber, 1);
       expect(item.discNumber, 1);
       expect(item.albumTitle, 'Live at Testhalle');
+      expect(item.albumYear, 2022);
       expect(item.albumArtistTitle, 'The Synth Pops');
       // Artists == [AlbumArtist] → no per-track performer override.
       expect(item.originalTitle, isNull);

test/services/music/music_playback_service_test.dart

@@ -89,6 +89,8 @@ class FakePlayer implements Player {
   final List<Media?> setNextCalls = [];
   final List<Duration> seeks = [];
   final List<double> volumes = [];
+  Completer<void>? playGate;
+  Completer<void>? pauseGate;
 
   /// Arming these URIs throws, simulating a native setNext failure.
   final Set<String> failingSetNextUris = {};
@@ -178,6 +180,7 @@ class FakePlayer implements Player {
   @override
   Future<void> play() async {
     playCalls++;
+    await playGate?.future;
     _state = _state.copyWith(playing: true, completed: false);
     playingCtrl.add(true);
   }
@@ -185,6 +188,7 @@ class FakePlayer implements Player {
   @override
   Future<void> pause() async {
     pauseCalls++;
+    await pauseGate?.future;
     _state = _state.copyWith(playing: false);
     playingCtrl.add(false);
   }
@@ -351,6 +355,7 @@ class RecordedReport {
 class FakeMediaServerClient extends Fake implements MediaServerClient {
   final List<RecordedReport> reports = [];
   final List<String> markedWatched = [];
+  Completer<List<MediaItem>>? instantMixGate;
 
   Iterable<RecordedReport> reportsFor(String state) => reports.where((r) => r.state == state);
 
@@ -363,6 +368,14 @@ class FakeMediaServerClient extends Fake implements MediaServerClient {
   @override
   bool get marksWatchedOnPlaybackStopped => false;
 
+  @override
+  void close() {}
+
+  @override
+  Future<List<MediaItem>> fetchInstantMix(String itemId, {int limit = 100}) {
+    return instantMixGate?.future ?? Future.value(const []);
+  }
+
   @override
   Future<void> markWatched(MediaItem item) async {
     markedWatched.add(item.id);
@@ -419,6 +432,7 @@ class FakeMusicSourceResolver implements MusicSourceResolver {
   final MediaServerClient? client;
   final Set<String> failingIds = {};
   final Map<String, int> resolveCounts = {};
+  final Map<String, Completer<void>> resolveGates = {};
 
   /// Per-track URL overrides (e.g. content:// shapes for offline tracks).
   final Map<String, String> urlOverrides = {};
@@ -426,6 +440,7 @@ class FakeMusicSourceResolver implements MusicSourceResolver {
   @override
   Future<MusicSource> resolve(MediaItem track) async {
     resolveCounts[track.id] = (resolveCounts[track.id] ?? 0) + 1;
+    await resolveGates[track.id]?.future;
     if (failingIds.contains(track.id)) {
       throw StateError('resolve failed for ${track.id}');
     }
@@ -510,13 +525,14 @@ class _GatedVolumeWriter {
 }
 
 class _Harness {
-  _Harness._(this.service, this.resolver, this.client, this.controls, this.players);
+  _Harness._(this.service, this.resolver, this.client, this.controls, this.players, this.serverManager);
 
   final MusicPlaybackServiceImpl service;
   final FakeMusicSourceResolver resolver;
   final FakeMediaServerClient client;
   final FakeMediaControlsManager controls;
   final List<FakePlayer> players;
+  final MultiServerManager serverManager;
 
   /// Seeded into every created FakePlayer — lets a test configure arm
   /// failures before the first player exists.
@@ -529,9 +545,10 @@ class _Harness {
     final resolver = FakeMusicSourceResolver(client: client);
     final controls = FakeMediaControlsManager();
     final players = <FakePlayer>[];
+    final serverManager = MultiServerManager()..debugRegisterClientForTesting(client);
     late final _Harness harness;
     final service = MusicPlaybackServiceImpl(
-      serverManager: MultiServerManager(),
+      serverManager: serverManager,
       resolver: resolver,
       audioPlayerFactory: () {
         final player = FakePlayer();
@@ -545,7 +562,7 @@ class _Harness {
       completedConfirmDelay: Duration.zero,
       volumePersistenceWriter: volumePersistenceWriter,
     );
-    harness = _Harness._(service, resolver, client, controls, players);
+    harness = _Harness._(service, resolver, client, controls, players, serverManager);
     return harness;
   }
 
@@ -579,6 +596,7 @@ void main() {
       player.closeControllers();
     }
     h.controls.closeControllers();
+    h.serverManager.dispose();
   });
 
   test('volume updates notify only the dedicated volume listenable', () async {
@@ -687,6 +705,47 @@ void main() {
     expect(h.controls.metadataTitles, ['Track t1']);
   });
 
+  test('a superseded slow gapless resolve cannot overwrite the newly requested arm', () async {
+    final oldArmGate = Completer<void>();
+    h.resolver.resolveGates[t2.id] = oldArmGate;
+
+    await h.playTracks([t1, t2]);
+    expect(h.player.armed, isNull);
+
+    h.service.addNext([t3]);
+    oldArmGate.complete();
+    await pumpEventQueue();
+
+    expect(h.player.armed?.uri, _urlFor(t3));
+  });
+
+  test('end-of-track sleep invalidates a slow gapless resolve', () async {
+    final armGate = Completer<void>();
+    h.resolver.resolveGates[t2.id] = armGate;
+
+    await h.playTracks([t1, t2]);
+    h.service.setSleepTimer(null, endOfTrack: true);
+    armGate.complete();
+    await pumpEventQueue();
+
+    expect(h.service.sleepTimerEndOfTrack, isTrue);
+    expect(h.player.armed, isNull);
+  });
+
+  test('a slow instant mix cannot replace a newer explicit queue', () async {
+    final mixGate = Completer<List<MediaItem>>();
+    h.client.instantMixGate = mixGate;
+
+    final mix = h.service.playInstantMix(t1);
+    await h.playTracks([t3]);
+    mixGate.complete([t1, t2]);
+    await mix;
+    await pumpEventQueue();
+
+    expect(h.service.currentTrack?.id, t3.id);
+    expect(h.service.queue.map((track) => track.id), [t3.id]);
+  });
+
   test('trackTransition advances the cursor, re-arms, and reports the previous track stopped at duration', () async {
     await h.playTracks([t1, t2, t3]);
 
@@ -876,6 +935,35 @@ void main() {
     expect(h.client.reportsFor('stopped').map((r) => r.itemId), ['t1']);
   });
 
+  test('a late play completion cannot revive a stopped session', () async {
+    await h.playTracks([t1]);
+    await h.service.pause();
+    final gate = Completer<void>();
+    h.player.playGate = gate;
+
+    final play = h.service.play();
+    await h.service.stop();
+    gate.complete();
+    await play;
+
+    expect(h.service.status, MusicPlaybackStatus.idle);
+    expect(h.service.currentTrack, isNull);
+  });
+
+  test('a late pause completion cannot change a stopped session', () async {
+    await h.playTracks([t1]);
+    final gate = Completer<void>();
+    h.player.pauseGate = gate;
+
+    final pause = h.service.pause();
+    await h.service.stop();
+    gate.complete();
+    await pause;
+
+    expect(h.service.status, MusicPlaybackStatus.idle);
+    expect(h.service.currentTrack, isNull);
+  });
+
   test('interruption pauses and resumes when the system says shouldResume', () async {
     await h.playTracks([t1, t2]);
 

test/services/plex_mappers_test.dart

@@ -243,6 +243,7 @@ void main() {
         'parentIndex': 1,
         'parentRatingKey': '510',
         'parentTitle': 'Season 1',
+        'parentYear': 2008,
         'parentThumb': '/library/metadata/510/thumb/1',
         'grandparentRatingKey': '500',
         'grandparentTitle': 'Breaking Bad',
@@ -258,6 +259,7 @@ void main() {
       expect(item.parentIndex, 1);
       expect(item.parentId, '510');
       expect(item.parentTitle, 'Season 1');
+      expect(item.year, isNull);
       expect(item.parentThumbPath, '/library/metadata/510/thumb/1');
       expect(item.grandparentId, '500');
       expect(item.grandparentTitle, 'Breaking Bad');
@@ -299,6 +301,7 @@ void main() {
         'index': 8,
         'parentRatingKey': '700',
         'parentTitle': 'Random Access Memories',
+        'parentYear': 2013,
         'grandparentRatingKey': '699',
         'grandparentTitle': 'Daft Punk',
         'duration': 369000,
@@ -311,6 +314,8 @@ void main() {
       expect(item.durationMs, 369000);
       expect(item.parentId, '700');
       expect(item.parentTitle, 'Random Access Memories');
+      expect(item.year, 2013);
+      expect(item.albumYear, 2013);
       expect(item.grandparentId, '699');
       expect(item.grandparentTitle, 'Daft Punk');
     });

test/widgets/media_context_menu_test.dart

@@ -1,4 +1,5 @@
 import '../test_helpers/paged_fakes.dart';
+import 'dart:async';
 import 'dart:convert';
 
 import 'package:drift/native.dart';
@@ -200,6 +201,30 @@ void main() {
       expect(music.callCount, 2);
       expect(music.playedTracks, tracks);
       expect(music.shuffle, isTrue);
+
+      final staleFetchGate = Completer<void>();
+      client.fetchGate = staleFetchGate;
+      menuKey.currentState!.showContextMenu(tester.element(find.text('audio target')));
+      await tester.pumpAndSettle();
+      await tester.tap(find.text(t.common.play));
+      await tester.pump();
+
+      final newerTrack = testMediaItem(
+        id: 'newer-track',
+        backend: MediaBackend.jellyfin,
+        kind: MediaKind.track,
+        title: 'Newer Track',
+        serverId: 'srv-1',
+      );
+      await music.playFromList(
+        tracks: [newerTrack],
+        playContext: const MusicPlayContext(title: 'Newer Queue', kind: MusicPlayContextKind.tracks),
+      );
+      staleFetchGate.complete();
+      await tester.pumpAndSettle();
+
+      expect(music.callCount, 3, reason: 'the stale playlist fetch must not start a fourth queue');
+      expect(music.playedTracks, [newerTrack]);
       expect(tester.takeException(), isNull);
     });
 
@@ -408,6 +433,49 @@ void main() {
         same(harness.music),
       );
     });
+
+    testWidgets('a slow music enqueue does not append to a newer queue session', (tester) async {
+      final album = testMediaItem(
+        id: 'album-1',
+        backend: MediaBackend.jellyfin,
+        kind: MediaKind.album,
+        title: 'Album',
+        serverId: 'srv-1',
+      );
+      final albumTrack = testMediaItem(
+        id: 'album-track',
+        backend: MediaBackend.jellyfin,
+        kind: MediaKind.track,
+        title: 'Album Track',
+        serverId: 'srv-1',
+      );
+      final harness = await _pumpSiblingMusicMenu(tester, item: album, relatedItems: [albumTrack]);
+      final fetchGate = Completer<void>();
+      harness.client.albumTracksGate = fetchGate;
+
+      harness.menuKey.currentState!.showContextMenu(tester.element(find.text('mini-player menu target')));
+      await tester.pumpAndSettle();
+      await tester.tap(find.text(t.music.playNext));
+      await tester.pump();
+
+      final newerTrack = testMediaItem(
+        id: 'newer-track',
+        backend: MediaBackend.jellyfin,
+        kind: MediaKind.track,
+        title: 'Newer Track',
+        serverId: 'srv-1',
+      );
+      await harness.music.playFromList(
+        tracks: [newerTrack],
+        playContext: const MusicPlayContext(title: 'Newer Queue', kind: MusicPlayContextKind.tracks),
+      );
+      fetchGate.complete();
+      await tester.pumpAndSettle();
+
+      expect(harness.music.addedNext, isEmpty);
+      expect(harness.music.playedTracks, [newerTrack]);
+      expect(tester.takeException(), isNull);
+    });
   });
 }
 
@@ -522,6 +590,7 @@ Future<void> _openPlaylistPicker(WidgetTester tester, GlobalKey<MediaContextMenu
 
 class _AudioPlaylistClient implements MediaServerClient {
   final List<MediaItem> tracks;
+  Completer<void>? fetchGate;
 
   _AudioPlaylistClient(this.tracks);
 
@@ -539,6 +608,7 @@ class _AudioPlaylistClient implements MediaServerClient {
 
   @override
   Future<LibraryPage<MediaItem>> fetchPlaylistPage(String id, {int? start, int? size, AbortController? abort}) async {
+    await fetchGate?.future;
     return fakeLibraryPage(tracks, start: start, size: size);
   }
 
@@ -551,6 +621,7 @@ class _AudioPlaylistClient implements MediaServerClient {
 
 class _RecordingMusicPlaybackService extends StubMusicPlaybackService {
   List<MediaItem>? playedTracks;
+  final List<MediaItem> addedNext = [];
   MusicPlayContext? playedContext;
   bool? shuffle;
   int callCount = 0;
@@ -565,17 +636,27 @@ class _RecordingMusicPlaybackService extends StubMusicPlaybackService {
     required MusicPlayContext playContext,
     bool shuffle = false,
   }) async {
+    await super.playFromList(tracks: tracks, startTrack: startTrack, playContext: playContext, shuffle: shuffle);
     callCount++;
     playedTracks = tracks;
     playedContext = playContext;
     this.shuffle = shuffle;
   }
+
+  @override
+  void addNext(List<MediaItem> tracks) {
+    addedNext.addAll(tracks);
+  }
 }
 
 class _RelatedMusicClient implements MediaServerClient {
-  _RelatedMusicClient(Iterable<MediaItem> items) : _items = {for (final item in items) item.id: item};
+  _RelatedMusicClient(Iterable<MediaItem> items)
+    : _items = {for (final item in items) item.id: item},
+      albumTracks = items.where((item) => item.kind == MediaKind.track).toList();
 
   final Map<String, MediaItem> _items;
+  final List<MediaItem> albumTracks;
+  Completer<void>? albumTracksGate;
 
   @override
   ServerId get serverId => ServerId('srv-1');
@@ -593,7 +674,10 @@ class _RelatedMusicClient implements MediaServerClient {
   Future<MediaItem?> fetchItem(String id) async => _items[id];
 
   @override
-  Future<List<MediaItem>> fetchAlbumTracks(String albumId) async => const [];
+  Future<List<MediaItem>> fetchAlbumTracks(String albumId) async {
+    await albumTracksGate?.future;
+    return albumTracks;
+  }
 
   @override
   Future<List<MediaItem>> fetchArtistAlbums(MediaItem artist) async => const [];
@@ -611,12 +695,14 @@ class _SiblingMusicMenuHarness {
     required this.profileNavigatorKey,
     required this.menuKey,
     required this.music,
+    required this.client,
   });
 
   final GlobalKey<NavigatorState> rootNavigatorKey;
   final GlobalKey<NavigatorState> profileNavigatorKey;
   final GlobalKey<MediaContextMenuState> menuKey;
   final _RecordingMusicPlaybackService music;
+  final _RelatedMusicClient client;
 }
 
 Future<_SiblingMusicMenuHarness> _pumpSiblingMusicMenu(
@@ -722,6 +808,7 @@ Future<_SiblingMusicMenuHarness> _pumpSiblingMusicMenu(
     profileNavigatorKey: profileNavigatorKey,
     menuKey: menuKey,
     music: music,
+    client: client,
   );
 }
 

test/widgets/music/mini_player_test.dart

@@ -1,3 +1,5 @@
+import 'dart:async';
+
 import 'package:drift/native.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
@@ -69,6 +71,8 @@ class _FakeDownloadProvider extends ChangeNotifier implements DownloadProvider {
 /// Fixed-state fake: reports a playing session with a single-track queue.
 class _FakeMusicService extends StubMusicPlaybackService {
   MediaItem? track;
+  final StreamController<Duration> _positionController = StreamController<Duration>.broadcast(sync: true);
+  Duration _position = Duration.zero;
   int previousCalls = 0;
   int toggleCalls = 0;
   int nextCalls = 0;
@@ -85,6 +89,12 @@ class _FakeMusicService extends StubMusicPlaybackService {
   @override
   MusicPlaybackStatus get status => track == null ? MusicPlaybackStatus.idle : MusicPlaybackStatus.playing;
 
+  @override
+  Duration get position => _position;
+
+  @override
+  Stream<Duration> get positionStream => _positionController.stream;
+
   @override
   Duration? get duration => track == null ? null : const Duration(minutes: 3);
 
@@ -94,6 +104,17 @@ class _FakeMusicService extends StubMusicPlaybackService {
   @override
   int get currentIndex => track == null ? -1 : 0;
 
+  void emitPosition(Duration position) {
+    _position = position;
+    _positionController.add(position);
+  }
+
+  void advanceTo(MediaItem next) {
+    track = next;
+    _position = Duration.zero;
+    notifyListeners();
+  }
+
   @override
   Future<void> previous() async {
     previousCalls++;
@@ -113,6 +134,12 @@ class _FakeMusicService extends StubMusicPlaybackService {
   Future<void> stop() async {
     stopCalls++;
   }
+
+  @override
+  void dispose() {
+    _positionController.close();
+    super.dispose();
+  }
 }
 
 void main() {
@@ -183,6 +210,37 @@ void main() {
     expect(find.byType(IconButton), findsNWidgets(2)); // play/pause + next (mobile layout)
   });
 
+  testWidgets('progress resets immediately when the current track changes', (tester) async {
+    final nextTrack = testMediaItem(
+      id: 'track_2',
+      backend: MediaBackend.plex,
+      kind: MediaKind.track,
+      title: 'Noon',
+      durationMs: 180000,
+      serverId: 'server_1',
+    );
+    final service = _FakeMusicService(track: _track);
+    final observer = MusicUiRouteObserver();
+
+    await tester.pumpWidget(wrap(service: service, observer: observer));
+    await tester.pumpAndSettle();
+    service.emitPosition(const Duration(minutes: 2));
+    await tester.pump();
+
+    Iterable<double?> progressWidths() => tester
+        .widgetList<FractionallySizedBox>(find.byType(FractionallySizedBox))
+        .where((box) => box.heightFactor == 1)
+        .map((box) => box.widthFactor);
+
+    expect(progressWidths(), contains(closeTo(2 / 3, 0.001)));
+
+    service.advanceTo(nextTrack);
+    await tester.pump();
+
+    expect(progressWidths(), contains(0.0));
+    expect(progressWidths(), isNot(contains(closeTo(2 / 3, 0.001))));
+  });
+
   testWidgets('tapping the card edge opens the named Now Playing route', (tester) async {
     final service = _FakeMusicService(track: _track);
     final observer = MusicUiRouteObserver();