fix(player): 隔离播放资源所有权并修复黑屏

test/playback/playback_session_test.dart

@@ -32,6 +32,68 @@ void main() {
     await session.close();
   });
 
+  test('should_not_retire_home_controller_when_player_switches_episodes', () async {
+    final factory = FakeFactory();
+    final home = PlaybackSession(
+      episodes: episodes,
+      factory: factory.create,
+      canPlay: (episode) => episode.isFree,
+      owner: PlaybackSessionOwner.home,
+    );
+    await home.select(0, preloadIndex: 1);
+    await home.preloadSettled;
+    final homePlayer = home.active;
+    expect(homePlayer, isNotNull);
+
+    final player = PlaybackSession(
+      episodes: episodes,
+      factory: factory.create,
+      canPlay: (episode) => episode.isFree,
+      owner: PlaybackSessionOwner.player,
+    );
+    await player.select(0, preloadIndex: 1);
+    await player.select(1, previousIndex: 0);
+    await player.preloadSettled;
+
+    expect(home.active, same(homePlayer));
+    expect(
+      factory.created
+          .firstWhere((candidate) => identical(candidate, homePlayer))
+          .disposed,
+      isFalse,
+    );
+    expect(player.active, isNot(same(homePlayer)));
+    await player.close();
+    await home.close();
+  });
+
+  test('should_keep_home_controller_alive_when_player_session_closes', () async {
+    final factory = FakeFactory();
+    final home = PlaybackSession(
+      episodes: episodes,
+      factory: factory.create,
+      canPlay: (episode) => episode.isFree,
+      owner: PlaybackSessionOwner.home,
+    );
+    await home.select(0);
+    final homePlayer = home.active! as FakePlayer;
+
+    final player = PlaybackSession(
+      episodes: episodes,
+      factory: factory.create,
+      canPlay: (episode) => episode.isFree,
+      owner: PlaybackSessionOwner.player,
+    );
+    await player.select(0);
+    await player.select(1);
+    await player.close();
+
+    expect(homePlayer.disposed, isFalse);
+    expect(home.active, same(homePlayer));
+    expect(home.currentIndex, 0);
+    await home.close();
+  });
+
   test('should_release_previous_player_immediately_when_selecting_locked', () async {
     final lockedEpisodes = [
       Episode(