fix(player): 预热直出并与视频统一封面布局

lib/pages/player/player_view.dart

@@ -587,6 +587,9 @@ class _PlayerPageState extends State<PlayerPage>
     if (selected && videoReady) _logSwipeReveal();
     final ready = videoReady || port != null;
     final theater = logic.pip || logic.pipPreparing;
+    final videoFit = theater ? BoxFit.contain : BoxFit.cover;
+    final preparedFrameAvailable =
+        selected && logic.session.reusedWarmAt(index);
     final locked = logic.session.isLocked || episode.locked;
     if (selected &&
         videoPort != null &&
@@ -613,9 +616,11 @@ class _PlayerPageState extends State<PlayerPage>
           videoUrl: videoPort?.controller.dataSource ?? episode.videoUrl,
           theater: theater,
           holdOpeningUntilFirstFrame: logic.session.userWantsPlay,
+          preparedFrameAvailable: preparedFrameAvailable,
           openingFrame: playerOpeningFrame(
             episode.thumbnailsUrl,
             posterUrl: drama.posterUrl,
+            fit: videoFit,
           ),
         ),
         if (selected &&