style(theme): 客户端切换深色视觉风格

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));
   });