style(theme): 客户端切换深色视觉风格

test/player/loading_progress_track_test.dart

@@ -3,6 +3,7 @@
 import 'package:flutter/material.dart';
 import 'package:flutter_test/flutter_test.dart';
 
+import 'package:fruitshorts/core/theme/app_colors.dart';
 import 'package:fruitshorts/pages/player/widgets/loading_progress_track.dart';
 
 void main() {
@@ -28,7 +29,7 @@ void main() {
       tester
           .widget<ColoredBox>(find.byKey(const Key('progress-loading-track')))
           .color,
-      Colors.white24,
+      AppColors.inactiveTrack,
     );
     expect(
       tester
@@ -36,7 +37,7 @@ void main() {
             find.byKey(const Key('progress-loading-highlight')),
           )
           .color,
-      Colors.white,
+      AppColors.onPrimary,
     );
 
     final initialLeft = tester

test/player/player_fullscreen_test.dart

@@ -825,7 +825,10 @@ void main() {
     for (final style in [label, synopsis, separator]) {
       expect(style.fontSize, 12);
       expect(style.fontWeight, FontWeight.w500);
-      expect(style.color?.withValues(alpha: 1), AppColors.playerMuted);
+      expect(
+        style.color?.withValues(alpha: 1),
+        AppColors.playerMuted.withValues(alpha: 1),
+      );
     }
     expect(separator.color, isNot(Colors.white));
   });