fix(jellyfin): hide unsupported continue watching removal

close #995

lib/media/media_server_client.dart

@@ -232,8 +232,9 @@ abstract class MediaServerClient {
   Future<void> markWatched(MediaItem item);
   Future<void> markUnwatched(MediaItem item);
 
-  /// Hide an item from Continue Watching without changing its watched
-  /// status.
+  /// Hide an item from Continue Watching without changing watched status or
+  /// progress. Only call when [capabilities.continueWatchingRemoval] is true;
+  /// unsupported backends throw [UnsupportedError].
   Future<void> removeFromContinueWatching(MediaItem item);
 
   /// Rate the item on a 0–10 scale. Backends without numeric ratings

lib/media/server_capabilities.dart

@@ -60,6 +60,10 @@ class ServerCapabilities {
   /// only a binary like/dislike, so star sliders should be hidden.
   final bool numericUserRating;
 
+  /// Hide an item from Continue Watching without changing watch state or
+  /// playback progress. Plex exposes this directly; Jellyfin does not.
+  final bool continueWatchingRemoval;
+
   /// External subtitle search/marketplace (Plex `/library/metadata/{id}/subtitles`).
   /// Hides the "Search subtitles" affordance when false.
   final bool externalSubtitleSearch;
@@ -113,6 +117,7 @@ class ServerCapabilities {
     this.serverSideSync = false,
     this.richHubs = false,
     this.numericUserRating = false,
+    this.continueWatchingRemoval = false,
     this.externalSubtitleSearch = false,
     this.trackPreferencePersistence = false,
     this.endpointFailover = false,
@@ -135,6 +140,7 @@ class ServerCapabilities {
     serverSideSync: true,
     richHubs: true,
     numericUserRating: true,
+    continueWatchingRemoval: true,
     externalSubtitleSearch: true,
     trackPreferencePersistence: true,
     endpointFailover: true,
@@ -185,6 +191,7 @@ class ServerCapabilities {
     bool? serverSideSync,
     bool? richHubs,
     bool? numericUserRating,
+    bool? continueWatchingRemoval,
     bool? externalSubtitleSearch,
     bool? trackPreferencePersistence,
     bool? endpointFailover,
@@ -205,6 +212,7 @@ class ServerCapabilities {
       serverSideSync: serverSideSync ?? this.serverSideSync,
       richHubs: richHubs ?? this.richHubs,
       numericUserRating: numericUserRating ?? this.numericUserRating,
+      continueWatchingRemoval: continueWatchingRemoval ?? this.continueWatchingRemoval,
       externalSubtitleSearch: externalSubtitleSearch ?? this.externalSubtitleSearch,
       trackPreferencePersistence: trackPreferencePersistence ?? this.trackPreferencePersistence,
       endpointFailover: endpointFailover ?? this.endpointFailover,

lib/services/jellyfin_client.dart

@@ -1358,12 +1358,7 @@ class JellyfinClient with MediaServerCacheMixin implements MediaServerClient, Sc
 
   @override
   Future<void> removeFromContinueWatching(MediaItem item) async {
-    // Jellyfin uses a `Hide` endpoint to remove items from Continue Watching.
-    final response = await _http.post(
-      '/UserItems/${_segment(item.id)}/HideFromResume',
-      queryParameters: {'userId': connection.userId, 'Hide': 'true'},
-    );
-    throwIfHttpError(response);
+    throw UnsupportedError('Jellyfin does not support removing items from Continue Watching.');
   }
 
   @override

lib/widgets/media_context_menu.dart

@@ -211,11 +211,11 @@ class MediaContextMenuState extends State<MediaContextMenu> {
       activeProfile: activeProfile,
     );
 
-    // Backend capabilities — used to gate the "Play Version" item below.
-    // Reads the same `capabilities.videoTranscoding` flag the in-player
-    // sheet uses so the two surfaces never disagree about what's offered.
+    // Backend capabilities gate menu items so we don't expose actions the
+    // active server cannot perform.
     final mediaClient = _itemServerId != null ? multiServerProvider.getClientForServer(_itemServerId!) : null;
     final canTranscode = mediaClient?.capabilities.videoTranscoding ?? false;
+    final canRemoveFromContinueWatching = mediaClient?.capabilities.continueWatchingRemoval ?? false;
 
     final menuActions = <_MenuAction>[];
 
@@ -271,7 +271,7 @@ class MediaContextMenuState extends State<MediaContextMenu> {
         );
       }
 
-      if (widget.isInContinueWatching) {
+      if (widget.isInContinueWatching && canRemoveFromContinueWatching) {
         menuActions.add(
           _MenuAction(
             value: 'remove_from_continue_watching',

test/services/jellyfin_client_urls_test.dart

@@ -399,7 +399,6 @@ void main() {
       await scoped.fetchClientSideEpisodeQueue('folder/show #1?x');
       await scoped.markWatched(item);
       await scoped.markUnwatched(item);
-      await scoped.removeFromContinueWatching(item);
       await scoped.rate(item, 7);
       await scoped.rate(item, -1);
 
@@ -408,10 +407,26 @@ void main() {
       expect(paths, contains('/Shows/folder%2Fshow%20%231%3Fx/Episodes'));
       expect(paths, contains('/UserPlayedItems/folder%2Fitem%20%231%3Fx'));
       expect(paths.where((p) => p == '/UserPlayedItems/folder%2Fitem%20%231%3Fx'), hasLength(2));
-      expect(paths, contains('/UserItems/folder%2Fitem%20%231%3Fx/HideFromResume'));
       expect(paths.where((p) => p == '/UserItems/folder%2Fitem%20%231%3Fx/Rating'), hasLength(2));
     });
 
+    test('removeFromContinueWatching is unsupported for Jellyfin and does not call the server', () async {
+      var requested = false;
+      final scoped = JellyfinClient.forTesting(
+        connection: _conn(),
+        httpClient: MockClient((request) async {
+          requested = true;
+          return http.Response('', 500);
+        }),
+      );
+      addTearDown(scoped.close);
+
+      final item = MediaItem(id: 'item-1', backend: MediaBackend.jellyfin, kind: MediaKind.movie, serverId: 'srv-1');
+
+      await expectLater(scoped.removeFromContinueWatching(item), throwsA(isA<UnsupportedError>()));
+      expect(requested, isFalse);
+    });
+
     test('getPlaybackInitialization URL-encodes appended api_key', () async {
       final scoped = JellyfinClient.forTesting(
         connection: _conn(accessToken: 'tok+with spaces/?&'),