fix(flutter): 底栏右侧改为清屏

lib/pages/player/player_view_actions.dart

@@ -32,6 +32,7 @@ extension _PlayerViewActions on _PlayerPageState {
           speed: _playbackSpeed,
           qualities: logic.qualities,
           textScale: _textScale,
+          pipAvailable: logic.pictureInPicture.isPlatformSupported,
         ),
         actions: PlayerMoreActions(
           onSpeedChanged: (value) {
@@ -42,6 +43,9 @@ extension _PlayerViewActions on _PlayerPageState {
           onClear: _hideChrome,
           onDownload: () => requestEpisodeDownload(context, episode.id),
           onReport: () => unawaited(_reportDrama(context, drama, l10n)),
+          onPip: logic.pictureInPicture.isPlatformSupported
+              ? () => unawaited(logic.enterPip(context))
+              : null,
         ),
       ),
     );