fix(flutter): 支持全屏胶囊双态切换

lib/pages/player/widgets/player_overlay.dart

@@ -56,8 +56,8 @@ class PlayerPlaybackOverlay extends StatelessWidget {
             _top(context),
             _bottom(context),
             _rail(context),
-            _fullScreenPill(),
           ],
+          _fullScreenPill(),
           if (!controlsVisible)
             Positioned(
               top: AppDimens.spaceSm,
@@ -321,7 +321,7 @@ class PlayerPlaybackOverlay extends StatelessWidget {
           child: InkWell(
             key: const Key('player-fullscreen-toggle'),
             borderRadius: BorderRadius.circular(999),
-            onTap: actions.onClear,
+            onTap: controlsVisible ? actions.onClear : actions.onExitClear,
             child: Padding(
               padding: const EdgeInsets.symmetric(horizontal: 14, vertical: 7),
               child: Row(
@@ -334,7 +334,9 @@ class PlayerPlaybackOverlay extends StatelessWidget {
                   ),
                   const SizedBox(width: 5),
                   Text(
-                    data.l10n.fullScreenWatch,
+                    controlsVisible
+                        ? data.l10n.fullScreenWatch
+                        : data.l10n.exitClearScreen,
                     style: const TextStyle(
                       color: AppColors.onPrimary,
                       fontSize: 12,

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 {