fix(player): 修复返回首页黑屏并恢复预热

test/playback/playback_session_test.dart

@@ -32,33 +32,6 @@ void main() {
     await session.close();
   });
 
-  test('should_keep_only_current_player_when_neighbor_warmup_disabled', () async {
-    final factory = FakeFactory();
-    final session = PlaybackSession(
-      episodes: episodes,
-      factory: factory.create,
-      canPlay: (episode) => episode.isFree,
-      warmNeighborsEnabled: false,
-    );
-
-    await session.select(0, preloadIndex: 1);
-    await session.preloadSettled;
-    expect(factory.created, hasLength(1));
-    expect(factory.live, 1);
-    expect(session.preloadedIndex, isNull);
-
-    final first = factory.created.single;
-    await session.select(1, preloadIndex: 2, previousIndex: 0);
-    await session.preloadSettled;
-
-    expect(first.disposed, isTrue);
-    expect(factory.created, hasLength(2));
-    expect(factory.live, 1);
-    expect(session.livePlayerCount, 1);
-    expect(session.active, same(factory.created.last));
-    await session.close();
-  });
-
   test('should_release_previous_player_immediately_when_selecting_locked', () async {
     final lockedEpisodes = [
       Episode(