refactor(ui): 清理 K26 旧 UI 与死代码

lib/l10n/app_localizations_zh.dart

@@ -354,12 +354,6 @@ class AppLocalizationsZh extends AppLocalizations {
   @override
   String get nowPlaying => '正在播放';
 
-  @override
-  String get watchFullscreen => '横屏全屏观看';
-
-  @override
-  String get exitFullscreen => '退出全屏';
-
   @override
   String get pictureInPicture => '画中画';
 
@@ -593,12 +587,6 @@ class AppLocalizationsZh extends AppLocalizations {
   @override
   String get swipeForNext => '上滑看下一部';
 
-  @override
-  String get clearScreen => '清屏';
-
-  @override
-  String get exitClearScreen => '退出清屏';
-
   @override
   String get logIn => '登录';