fix(flutter): 支持全屏胶囊双态切换

test/player/player_fullscreen_test.dart

@@ -383,6 +383,19 @@ void main() {
     expect(find.byKey(const Key('player-exit-clear-screen')), findsOneWidget);
   });
 
+  testWidgets('should_toggle_fullscreen_from_the_same_pill', (tester) async {
+    await _pumpApp(tester);
+    await _openSeriesPlayer(tester);
+    await tester.tap(find.byKey(const Key('player-fullscreen-toggle')));
+    await tester.pumpAndSettle();
+    expect(find.byKey(const Key('player-controls-top')), findsNothing);
+
+    await tester.tap(find.byKey(const Key('player-fullscreen-toggle')));
+    await tester.pumpAndSettle();
+    expect(find.byKey(const Key('player-controls-top')), findsOneWidget);
+    expect(find.byKey(const Key('player-controls-bottom')), findsOneWidget);
+  });
+
   testWidgets('should_open_unlock_panel_with_honest_method_states', (
     tester,
   ) async {