fix(flutter): 首页 feed 去底色并优化整集条

test/home/home_preview_layout_test.dart

@@ -209,17 +209,38 @@ void main() {
     );
     await tester.pumpAndSettle();
 
+    final bar = tester.getRect(find.byKey(const Key('home-feed-full-series')));
+    expect(bar.height, 44);
+    expect(
+      tester.getRect(find.textContaining('Watch full series')).center.dy,
+      closeTo(bar.center.dy, 2),
+    );
+    expect(
+      tester.getSize(find.byKey(const Key('home-feed-progress-thumb'))),
+      const Size(6, 6),
+    );
+
     await tester.tap(find.byKey(const Key('home-feed-refresh')));
     await tester.pump();
     expect(refreshed, 1);
 
-    await tester.drag(
-      find.byKey(const Key('home-feed-progress')),
-      const Offset(120, 0),
+    final gesture = await tester.startGesture(
+      tester.getCenter(find.byKey(const Key('home-feed-progress'))),
     );
+    await gesture.moveBy(const Offset(120, 0));
+    await tester.pump();
+    expect(
+      tester.getSize(find.byKey(const Key('home-feed-progress-thumb'))),
+      const Size(10, 10),
+    );
+    await gesture.up();
     await tester.pumpAndSettle();
     expect(seeked, isNotNull);
     expect(seeked!.inSeconds, greaterThan(0));
+    expect(
+      tester.getSize(find.byKey(const Key('home-feed-progress-thumb'))),
+      const Size(6, 6),
+    );
 
     await tester.tap(find.byKey(const Key('home-feed-full-series')));
     await tester.pump();