fix(player): 完善进度预览清屏与下拉刷新

test/player/scrub_preview_card_test.dart

@@ -140,6 +140,9 @@ class _FakeAxisSource extends ChangeNotifier
     Duration position,
   ) => frame;
 
+  @override
+  Future<void> prepareAt(String? thumbnailsUrl, Duration position) async {}
+
   @override
   bool hasAxis(String? thumbnailsUrl) => axisReady;
 }