feat(player): 接入双端画中画播放

lib/pages/player/player_view_actions.dart

@@ -37,9 +37,14 @@ extension _PlayerViewActions on _PlayerPageState {
           onQualityChanged: (quality) => _switchQuality(context, l10n, quality),
           onClear: _hideChrome,
           onDownload: () => requestEpisodeDownload(context, episode.id),
-          onPip: logic.pictureInPicture.isPlatformSupported
+          // iOS 不显示手动「画中画」入口（走下方「退出后自动小窗」开关）。
+          onPip: logic.pictureInPicture.isPlatformSupported && !logic.iosDevice
               ? () => unawaited(logic.enterPip(context))
               : null,
+          autoPipEnabled: logic.iosAutoPipEnabled,
+          onAutoPipChanged: logic.iosDevice
+              ? (value) => unawaited(logic.setIosAutoPip(value))
+              : null,
         ),
       ),
     );