fix(libraries): filter content-type-less Jellyfin roots

lib/screens/libraries/tabs/library_browse_tab.dart

@@ -767,7 +767,7 @@ class _LibraryBrowseTabState extends BaseLibraryTabState<MediaItem, LibraryBrows
       limit: size,
     );
     final query =
-        baseQuery.kind == null &&
+        (baseQuery.kind == null || baseQuery.kind == MediaKind.folder) &&
             baseQuery.includeKinds.isEmpty &&
             _selectedGrouping == browseGroupingAll &&
             widget.library.defaultBrowseKinds.isNotEmpty

lib/services/jellyfin_mappers.dart

@@ -268,12 +268,13 @@ class JellyfinMappers {
     final id = view['Id'] as String?;
     if (id == null || id.isEmpty) return null;
     final collectionType = view['CollectionType'] as String?;
+    final type = view['Type'] as String?;
     return MediaLibrary(
       id: id,
       backend: MediaBackend.jellyfin,
       title: view['Name'] as String? ?? t.libraries.fallbackTitle,
-      kind: _libraryKindFromCollectionType(collectionType, view['Type'] as String?),
-      defaultBrowseKinds: _defaultBrowseKindsFromCollectionType(collectionType),
+      kind: _libraryKindFromCollectionType(collectionType, type),
+      defaultBrowseKinds: _defaultBrowseKindsFromCollectionType(collectionType, type),
       updatedAt: jellyfinIsoToEpochSeconds(view['DateLastSaved'] as String? ?? view['DateModified'] as String?),
       createdAt: jellyfinIsoToEpochSeconds(view['DateCreated'] as String?),
       hidden: false,
@@ -317,8 +318,8 @@ class JellyfinMappers {
   }
 
   static MediaKind _libraryKindFromCollectionType(String? collectionType, String? type) {
-    final ct = collectionType?.toLowerCase();
-    if (ct != null) {
+    final ct = collectionType?.trim().toLowerCase();
+    if (ct != null && ct.isNotEmpty) {
       return switch (ct) {
         'movies' => MediaKind.movie,
         'tvshows' => MediaKind.show,
@@ -328,15 +329,17 @@ class JellyfinMappers {
         'photos' => MediaKind.photo,
         'boxsets' => MediaKind.collection,
         'playlists' => MediaKind.playlist,
-        'mixed' => MediaKind.unknown,
         _ => MediaKind.unknown,
       };
     }
     return MediaKind.fromString(type);
   }
 
-  static List<MediaKind> _defaultBrowseKindsFromCollectionType(String? collectionType) {
-    return collectionType?.toLowerCase() == 'mixed' ? const [MediaKind.movie, MediaKind.show] : const <MediaKind>[];
+  static List<MediaKind> _defaultBrowseKindsFromCollectionType(String? collectionType, String? type) {
+    final ct = collectionType?.trim();
+    return (ct == null || ct.isEmpty) && type?.toLowerCase() == 'collectionfolder'
+        ? const [MediaKind.movie, MediaKind.show]
+        : const <MediaKind>[];
   }
 
   static Map<String, dynamic>? _userData(Map<String, dynamic> item) {

test/screens/libraries/library_browse_tab_test.dart

@@ -20,6 +20,7 @@ import 'package:plezy/providers/multi_server_provider.dart';
 import 'package:plezy/screens/libraries/state_messages.dart';
 import 'package:plezy/screens/libraries/tabs/library_browse_tab.dart';
 import 'package:plezy/services/data_aggregation_service.dart';
+import 'package:plezy/services/jellyfin_mappers.dart';
 import 'package:plezy/services/multi_server_manager.dart';
 import 'package:plezy/services/settings_service.dart';
 import 'package:plezy/services/storage_service.dart';
@@ -137,20 +138,19 @@ void main() {
     final client = _BrowseClient('server-a', 'Mixed');
     final harness = _BrowseHarness(clientA: client);
     addTearDown(harness.dispose);
-    harness.selectedLibrary.value = MediaLibrary(
-      id: 'mixed-library',
-      backend: MediaBackend.jellyfin,
-      title: 'Mixed',
-      defaultBrowseKinds: const [MediaKind.movie, MediaKind.show],
-      serverId: client.serverId,
-    );
+    harness.selectedLibrary.value = JellyfinMappers.library({
+      'Id': 'mixed-library',
+      'Name': 'Mixed',
+      'Type': 'CollectionFolder',
+      'IsFolder': true,
+    }, serverId: client.serverId)!;
 
     await _pumpHarness(tester, harness);
 
     expect(client.pageQueries, hasLength(1));
-    expect(client.pageQueries.single.kind, isNull);
+    expect(client.pageQueries.single.kind, MediaKind.folder);
     expect(client.pageQueries.single.includeKinds, const [MediaKind.movie, MediaKind.show]);
-    expect(client.pageLibraryKinds.single, MediaKind.unknown);
+    expect(client.pageLibraryKinds.single, MediaKind.folder);
   });
 }
 

test/services/jellyfin_mappers_test.dart

@@ -474,18 +474,20 @@ void main() {
       }
     });
 
-    test('maps mixed collections to a movie and show root browse', () {
-      final mixed = JellyfinMappers.library({
-        'Id': 'view-mixed',
-        'Name': 'Mixed',
-        'CollectionType': 'mixed',
-      }, serverId: ServerId(_serverId))!;
-      expect(mixed.kind, MediaKind.unknown);
+    test('maps content-type-less collection folders to a movie and show root browse', () {
+      for (final view in [
+        {'Id': 'view-missing-type', 'Name': 'Mixed', 'Type': 'CollectionFolder', 'IsFolder': true},
+        {'Id': 'view-empty-type', 'Name': 'Mixed', 'Type': 'CollectionFolder', 'CollectionType': '', 'IsFolder': true},
+      ]) {
+        final mixed = JellyfinMappers.library(view, serverId: ServerId(_serverId))!;
+        expect(mixed.kind, MediaKind.folder);
         expect(mixed.defaultBrowseKinds, const [MediaKind.movie, MediaKind.show]);
+      }
 
       final unrecognised = JellyfinMappers.library({
         'Id': 'view-books',
         'Name': 'Books',
+        'Type': 'CollectionFolder',
         'CollectionType': 'books',
       }, serverId: ServerId(_serverId))!;
       expect(unrecognised.kind, MediaKind.unknown);