fix(flutter): 恢复播放器深色外观

lib/pages/player/widgets/seek_progress_bar.dart

@@ -27,6 +27,7 @@ class SeekProgressBar extends StatefulWidget {
     this.onSeek,
     this.showTimes = true,
     this.compact = false,
+    this.inactiveTrackColor = AppColors.border,
   });
 
   final ValueListenable<VideoPlayerValue>? valueListenable;
@@ -35,6 +36,7 @@ class SeekProgressBar extends StatefulWidget {
   final Future<void> Function(Duration)? onSeek;
   final bool showTimes;
   final bool compact;
+  final Color inactiveTrackColor;
 
   @override
   State<SeekProgressBar> createState() => _SeekProgressBarState();
@@ -127,7 +129,7 @@ class _SeekProgressBarState extends State<SeekProgressBar> {
                   ? (scrubbing ? 3 : 1.5)
                   : (scrubbing ? 4 : 3),
               activeTrackColor: AppColors.blue,
-              inactiveTrackColor: AppColors.border,
+              inactiveTrackColor: widget.inactiveTrackColor,
               thumbColor: AppColors.onPrimary,
               thumbShape: RoundSliderThumbShape(
                 enabledThumbRadius: widget.compact