feat(flutter): 重构播放页并增加语言切换

lib/pages/discover/discover_logic.dart

@@ -28,7 +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;
@@ -50,13 +49,6 @@ class DiscoverLogic extends ChangeNotifier {
 
   void openSearch() => searchFocus.requestFocus();
 
-  /// 选择语言；当前仅改变视觉选中态，不参与数据过滤。
-  void selectLanguage(TheaterLanguage value) {
-    if (language == value) return;
-    language = value;
-    notify();
-  }
-
   /// 选择分类；空值表示全部。
   void selectCategory(String? categoryId) {
     if (selectedCategoryId == categoryId) return;

lib/pages/discover/discover_types.dart

@@ -7,9 +7,6 @@ import '../../core/data/models/drama.dart';
 /// 剧场页与根导航之间的动作。
 enum DiscoverPageAction { home, create, my }
 
-/// 剧场语言筛选的视觉选中态。
-enum TheaterLanguage { all, zh, id, ms, en }
-
 /// 剧场页导航回调；没有 `onAction` 时按独立页面处理。
 class DiscoverPageCallbacks {
   const DiscoverPageCallbacks({

lib/pages/discover/discover_view.dart

@@ -175,7 +175,6 @@ class _DiscoverPageState extends State<DiscoverPage> {
         : categories.dramasOf(logic.selectedCategoryId!);
     return [
       _categoryChips(l10n, categories),
-      _languageChips(l10n),
       if (dramas.isEmpty)
         Padding(
           padding: const EdgeInsets.symmetric(vertical: 40),
@@ -222,38 +221,6 @@ class _DiscoverPageState extends State<DiscoverPage> {
     );
   }
 
-  Widget _languageChips(AppLocalizations l10n) {
-    final entries = [
-      (TheaterLanguage.all, l10n.allLanguages),
-      (TheaterLanguage.zh, l10n.simplifiedChinese),
-      (TheaterLanguage.id, l10n.bahasaIndonesia),
-      (TheaterLanguage.ms, l10n.bahasaMelayu),
-      (TheaterLanguage.en, l10n.english),
-    ];
-    return Padding(
-      padding: const EdgeInsets.fromLTRB(
-        AppDimens.pageHorizontal,
-        AppDimens.spaceSm,
-        AppDimens.pageHorizontal,
-        0,
-      ),
-      child: Wrap(
-        key: const Key('theater-language-chips'),
-        spacing: 10,
-        runSpacing: 10,
-        children: [
-          for (final entry in entries)
-            _filterChip(
-              key: Key('theater-language-${entry.$1.name}'),
-              label: entry.$2,
-              selected: logic.language == entry.$1,
-              onSelected: () => logic.selectLanguage(entry.$1),
-            ),
-        ],
-      ),
-    );
-  }
-
   Widget _filterChip({
     required Key key,
     required String label,