fix(player): 隔离播放资源所有权并修复黑屏

lib/pages/player/widgets/player_render_stack.dart

@@ -52,10 +52,12 @@ class PlayerRenderStack extends StatefulWidget {
     super.key,
     required this.pageController,
     required this.slots,
+    this.onCurrentVideoVisible,
   });
 
   final PageController pageController;
   final Map<PlayerRenderSlotRole, PlayerRenderSlotData> slots;
+  final VoidCallback? onCurrentVideoVisible;
 
   @override
   State<PlayerRenderStack> createState() => _PlayerRenderStackState();
@@ -68,7 +70,10 @@ class _PlayerRenderStackState extends State<PlayerRenderStack> {
   void initState() {
     super.initState();
     _lastCurrentIndex = _currentSlot.index;
-    _log('init current=${_lastCurrentIndex ?? '-'}');
+    _log(
+      'init current=${_lastCurrentIndex ?? '-'} '
+      'pageController=${identityHashCode(widget.pageController)}',
+    );
   }
 
   @override
@@ -86,7 +91,10 @@ class _PlayerRenderStackState extends State<PlayerRenderStack> {
 
   @override
   void dispose() {
-    _log('dispose current=${_lastCurrentIndex ?? '-'}');
+    _log(
+      'dispose current=${_lastCurrentIndex ?? '-'} '
+      'pageController=${identityHashCode(widget.pageController)}',
+    );
     super.dispose();
   }
 
@@ -189,6 +197,9 @@ class _PlayerRenderStackState extends State<PlayerRenderStack> {
           fallback: slot.fallback,
           warmSlotReused: slot.warmSlotReused,
           waitForPlaybackFrame: slot.waitForPlaybackFrame,
+          onVideoVisible: slot.role == PlayerRenderSlotRole.current
+              ? widget.onCurrentVideoVisible
+              : null,
         ),
       ),
     );