fix(player): 修复返回首页黑屏并恢复预热

lib/pages/player/player_view.dart

@@ -57,12 +57,8 @@ const double _playerLoadingStrokeWidth = 2;
 const double _feedRefreshTopGap = 56;
 
 class PlayerPageHandoff {
-  PlayerPageHandoff({
-    required this.prepareSource,
-    required this.sourceUserWantsPlay,
-  });
+  PlayerPageHandoff({required this.sourceUserWantsPlay});
 
-  final Future<void> Function() prepareSource;
   final bool sourceUserWantsPlay;
 }
 
@@ -145,8 +141,6 @@ class _PlayerPageState extends State<PlayerPage>
   DateTime? _swipeStartedAt;
   bool _swipePrewarmCaptured = false;
   bool _presentationActive = false;
-  bool _presentationSuspended = false;
-  bool _presentationReturning = false;
   bool _leavingHandoff = false;
   bool _preparingFullPlayer = false;
   final Set<String> _precachedPosterUrls = {};
@@ -538,8 +532,6 @@ class _PlayerPageState extends State<PlayerPage>
   }
 
   Widget _buildPlayer(BuildContext context) {
-    if (_presentationSuspended) return const SizedBox.expand();
-    if (_presentationReturning) return _buildPresentationReturnLayer();
     final interactions = context.watch<InteractionController>();
     final l10n = AppLocalizations.of(context)!;
     final indices = logic.visibleIndices;
@@ -736,17 +728,6 @@ class _PlayerPageState extends State<PlayerPage>
     };
   }
 
-  Widget _buildPresentationReturnLayer() {
-    final indices = logic.visibleIndices;
-    return AnimatedBuilder(
-      animation: logic.session,
-      builder: (context, _) => PlayerRenderStack(
-        pageController: _pageController,
-        slots: _renderSlots(indices),
-      ),
-    );
-  }
-
   PlayerRenderSlotData _renderSlot(
     PlayerRenderSlotRole role,
     int? index,
@@ -1191,10 +1172,7 @@ class _PlayerPageState extends State<PlayerPage>
       _preparingFullPlayer = false;
     }
     if (!mounted || !context.mounted) return;
-    final handoff = PlayerPageHandoff(
-      prepareSource: _prepareSourceAfterFullPlayer,
-      sourceUserWantsPlay: sourceUserWantsPlay,
-    );
+    final handoff = PlayerPageHandoff(sourceUserWantsPlay: sourceUserWantsPlay);
     _logFullPlayerRoute('present');
     setState(() => _presentationActive = true);
     final route = Navigator.of(context).push<void>(
@@ -1208,41 +1186,19 @@ class _PlayerPageState extends State<PlayerPage>
         ),
       ),
     );
-    await WidgetsBinding.instance.endOfFrame;
-    if (mounted) {
-      setState(() => _presentationSuspended = true);
-      await WidgetsBinding.instance.endOfFrame;
-    }
     await route;
     if (!mounted) return;
     logic.attach(widget, isMounted: () => mounted);
-    setState(() {
-      _presentationActive = false;
-      _presentationSuspended = false;
-      _presentationReturning = false;
-    });
+    setState(() => _presentationActive = false);
     await logic.resumeAfterFullPlayer();
     if (!mounted) return;
     _logFullPlayerRoute('restored');
   }
 
-  Future<void> _prepareSourceAfterFullPlayer() async {
-    if (!mounted) return;
-    logic.attach(widget, isMounted: () => mounted);
-    await logic.prepareFeedResume();
-    if (!mounted) return;
-    setState(() {
-      _presentationSuspended = false;
-      _presentationReturning = true;
-    });
-    await WidgetsBinding.instance.endOfFrame;
-  }
-
   Future<void> _leaveHandoff(BuildContext context) async {
     if (_leavingHandoff) return;
     setState(() => _leavingHandoff = true);
     await logic.session.pauseForRouteHandoff();
-    await widget.handoff?.prepareSource();
     if (context.mounted) Navigator.of(context).pop();
   }