Scope filter display-name cache by library context

lib/screens/libraries/filters_bottom_sheet.dart

@@ -14,6 +14,7 @@ class FiltersBottomSheet extends StatefulWidget {
   final Map<String, String> selectedFilters;
   final Function(Map<String, String>) onFiltersChanged;
   final String serverId;
+  final String libraryKey;
 
   const FiltersBottomSheet({
     super.key,
@@ -21,6 +22,7 @@ class FiltersBottomSheet extends StatefulWidget {
     required this.selectedFilters,
     required this.onFiltersChanged,
     required this.serverId,
+    required this.libraryKey,
   });
 
   @override
@@ -33,9 +35,12 @@ class _FiltersBottomSheetState extends State<FiltersBottomSheet> {
   bool _isLoadingValues = false;
   final Map<String, String> _tempSelectedFilters = {};
   static final Map<String, String> _filterDisplayNames = {}; // Cache for display names
+  static const int _maxCachedDisplayNames = 1000;
   late List<PlexFilter> _sortedFilters;
   late final FocusNode _initialFocusNode;
 
+  String _cacheKey(String filter, String value) => '${widget.serverId}:${widget.libraryKey}:$filter:$value';
+
   @override
   void initState() {
     super.initState();
@@ -165,7 +170,10 @@ class _FiltersBottomSheetState extends State<FiltersBottomSheet> {
                             setState(() {
                               _tempSelectedFilters[_currentFilter!.filter] = filterValue;
                               // Cache the display name for this filter value
-                              _filterDisplayNames['${_currentFilter!.filter}:$filterValue'] = value.title;
+                              if (_filterDisplayNames.length > _maxCachedDisplayNames) {
+                                _filterDisplayNames.clear();
+                              }
+                              _filterDisplayNames[_cacheKey(_currentFilter!.filter, filterValue)] = value.title;
                             });
                             _applyFilters();
                           },
@@ -233,7 +241,7 @@ class _FiltersBottomSheetState extends State<FiltersBottomSheet> {
                     String? displayValue;
                     if (selectedValue != null) {
                       // Try to get the cached display name, fall back to the value itself
-                      displayValue = _filterDisplayNames['${filter.filter}:$selectedValue'] ?? selectedValue;
+                      displayValue = _filterDisplayNames[_cacheKey(filter.filter, selectedValue)] ?? selectedValue;
                     }
 
                     return FocusableListTile(

lib/screens/libraries/tabs/library_browse_tab.dart

@@ -473,6 +473,7 @@ class _LibraryBrowseTabState extends BaseLibraryTabState<PlexMetadata, LibraryBr
         filters: _filters,
         selectedFilters: _selectedFilters,
         serverId: widget.library.serverId!,
+        libraryKey: widget.library.globalKey,
         onFiltersChanged: (filters) async {
           setState(() {
             _selectedFilters.clear();