fix(player): 规范预热回收日志并抓帧过渡

test/player/player_fullscreen_test.dart

@@ -129,11 +129,15 @@ void main() {
     expect(sourceLiveBefore, greaterThan(1));
 
     await tester.tap(find.byKey(const Key('home-feed-full-series')));
+    await _waitForFullPlayerEntry(tester);
     await tester.pumpAndSettle();
 
     final fullPlayer = _fullPlayerFinder();
     final fullLogic = _pageLogic(tester, fullPlayer);
     expect(fullLogic.session, isNot(same(sourceLogic.session)));
+    final fullPlayerWidget = tester.widget<PlayerPage>(fullPlayer);
+    expect(fullPlayerWidget.initialFrameBytes, isNotNull);
+    expect(fullPlayerWidget.revealAfterFirstFrame, isTrue);
     final fullPlayerPort = fullLogic.session.active! as VideoPlayerPort;
     expect(fullPlayerPort.controller, isNot(same(feedPlayer.controller)));
     expect(feedPlayer.disposed, isFalse);
@@ -221,6 +225,7 @@ void main() {
     expect(find.byKey(const Key('home-feed-center-play')), findsOneWidget);
 
     await tester.tap(find.byKey(const Key('home-feed-full-series')));
+    await _waitForFullPlayerEntry(tester);
     await tester.pumpAndSettle();
 
     expect(_fullPlayerFinder(), findsOneWidget);
@@ -263,6 +268,7 @@ void main() {
     expect(feedIndex, 1);
 
     await tester.tap(find.byKey(const Key('home-feed-full-series')));
+    await _waitForFullPlayerEntry(tester);
     await tester.pumpAndSettle();
 
     final fullLogic = _pageLogic(tester, _fullPlayerFinder());
@@ -1658,6 +1664,17 @@ Finder _fullPlayerFinder() {
   );
 }
 
+Future<void> _waitForFullPlayerEntry(WidgetTester tester) async {
+  for (var attempt = 0; attempt < 120; attempt++) {
+    await tester.runAsync(
+      () => Future<void>.delayed(const Duration(milliseconds: 10)),
+    );
+    await tester.pump(const Duration(milliseconds: 16));
+    if (_fullPlayerFinder().evaluate().isNotEmpty) return;
+  }
+  fail('full player route was not pushed after frame capture');
+}
+
 class _RouteVideoFactory {
   final List<_RouteVideoPlayer> created = [];
   final List<Episode> episodes = [];