feat(flutter): 完成 K28-A1 四 Tab 首页

lib/pages/discover/discover_logic.dart

@@ -28,8 +28,6 @@ class DiscoverLogic extends ChangeNotifier {
   String _lastRequestedQuery = '';
   int _searchRequest = 0;
   bool _disposed = false;
-  TheaterLanguage language = TheaterLanguage.all;
-  String? selectedCategoryId;
 
   bool get hasSearchQuery => search.text.trim().isNotEmpty;
 
@@ -50,20 +48,6 @@ class DiscoverLogic extends ChangeNotifier {
 
   void openSearch() => searchFocus.requestFocus();
 
-  /// Selects a language for the visual filter state.
-  void selectLanguage(TheaterLanguage value) {
-    if (language == value) return;
-    language = value;
-    notify();
-  }
-
-  /// Selects one category chip; null represents all categories.
-  void selectCategory(String? categoryId) {
-    if (selectedCategoryId == categoryId) return;
-    selectedCategoryId = categoryId;
-    notify();
-  }
-
   void retrySearch() {
     final query = search.text.trim();
     if (query.isNotEmpty) unawaited(_runSearch(query));