fix(player): iOS自动小窗仅在播放页活跃时拉起

lib/pages/player/player_view.dart

@@ -202,6 +202,7 @@ class _PlayerPageState extends State<PlayerPage>
     _pageController = logic.pages;
     // 自动小窗：独立播放页进入即挂；沉浸流随所在 tab 的激活状态挂/摘。
     unawaited(logic.syncPipAutoArm(widget.embedded ? widget.active : true));
+    logic.setPipPageActive(widget.embedded ? widget.active : true);
     if (!widget.embedded &&
         !logic.isEpisodeLocked(logic.session.currentEpisode)) {
       _loadingVisible = true;
@@ -222,6 +223,7 @@ class _PlayerPageState extends State<PlayerPage>
     // 沉浸流所在 tab 切换时同步自动小窗（激活挂、切走摘）。
     if (widget.embedded && oldWidget.active != widget.active) {
       unawaited(logic.syncPipAutoArm(widget.active));
+      logic.setPipPageActive(widget.active);
     }
     if (oldWidget.scrubCancelRequest != widget.scrubCancelRequest) {
       _cancelFeedScrub();
@@ -333,6 +335,7 @@ class _PlayerPageState extends State<PlayerPage>
   void dispose() {
     WidgetsBinding.instance.removeObserver(this);
     appRouteObserver.unsubscribe(this);
+    logic.setPipPageActive(false);
     _heartOverlayController.dispose();
     _spriteAxisService
       ..removeListener(_handleSpriteFrameChanged)