fix(player): 重构单层过渡并阻止锁定集串播

test/player/player_fullscreen_test.dart

@@ -1031,6 +1031,14 @@ void main() {
     await _pumpApp(
       tester,
       catalog: FakeCatalogRepository(dramas: const [_lockedDrama]),
+      playback: FakePlaybackRepository(
+        ticket: const PlayTicket(
+          episodeId: 'locked-demo-1',
+          accessible: false,
+          accessType: PlayTicket.coinRequired,
+          unlockCoin: 30,
+        ),
+      ),
     );
     await _openSeriesPlayer(
       tester,
@@ -1040,6 +1048,9 @@ void main() {
     expect(find.byKey(const Key('progress-loading-highlight')), findsNothing);
     expect(find.byKey(const Key('progress-inactive')), findsOneWidget);
     expect(find.byType(Slider), findsNothing);
+    expect(find.byKey(const Key('player-single-placeholder')), findsNothing);
+    expect(find.byKey(const Key('player-video-crossfade')), findsNothing);
+    expect(find.byKey(const Key('player-video-layer')), findsNothing);
     expect(
       tester
           .widget<SeekProgressBar>(find.byKey(const Key('player-progress')))