fix(player): 播放页改为非阻塞加载

lib/pages/player/widgets/player_render_stack.dart

@@ -58,7 +58,7 @@ class PlayerRenderStack extends StatefulWidget {
 
   final PageController pageController;
   final Map<PlayerRenderSlotRole, PlayerRenderSlotData> slots;
-  final VoidCallback? onCurrentVideoVisible;
+  final ValueChanged<int?>? onCurrentVideoVisible;
   final bool showNeighbors;
 
   @override
@@ -202,7 +202,7 @@ class _PlayerRenderStackState extends State<PlayerRenderStack> {
           warmSlotReused: slot.warmSlotReused,
           waitForPlaybackFrame: slot.waitForPlaybackFrame,
           onVideoVisible: slot.role == PlayerRenderSlotRole.current
-              ? widget.onCurrentVideoVisible
+              ? () => widget.onCurrentVideoVisible?.call(slot.index)
               : null,
         ),
       ),