fix(player): 修复进度条拖动树稳定性

test/home/home_preview_layout_test.dart

@@ -723,8 +723,24 @@ void main() {
     await gesture.moveBy(const Offset(120, 0));
     await tester.pump();
     expect(scrubVisibility.last, isTrue);
-    expect(find.byKey(const Key('home-feed-title')), findsNothing);
-    expect(find.byKey(const Key('rail-save')), findsNothing);
+    expect(find.byKey(const Key('home-feed-title')), findsOneWidget);
+    expect(find.byKey(const Key('rail-save')), findsOneWidget);
+    expect(
+      tester
+          .widget<AnimatedOpacity>(
+            find.byKey(const Key('home-feed-content-opacity')),
+          )
+          .opacity,
+      0,
+    );
+    expect(
+      tester
+          .widget<IgnorePointer>(
+            find.byKey(const Key('home-feed-content-ignore')),
+          )
+          .ignoring,
+      isTrue,
+    );
     expect(find.byKey(const Key('scrub-preview-time-bubble')), findsOneWidget);
     final bubbleRect = tester.getRect(
       find.byKey(const Key('scrub-preview-time-bubble')),
@@ -806,6 +822,14 @@ void main() {
     await tester.pumpAndSettle();
     expect(scrubVisibility.last, isFalse);
     expect(find.byKey(const Key('home-feed-title')), findsOneWidget);
+    expect(
+      tester
+          .widget<AnimatedOpacity>(
+            find.byKey(const Key('home-feed-content-opacity')),
+          )
+          .opacity,
+      1,
+    );
     expect(seeked, isNotNull);
     expect(seeked!.inSeconds, greaterThan(0));
     expect(