fix(flutter): 底栏右侧改为清屏

lib/pages/player/widgets/player_more_sheet.dart

@@ -18,6 +18,7 @@ class PlayerMoreState {
     required this.speed,
     required this.qualities,
     required this.textScale,
+    required this.pipAvailable,
   });
 
   /// 当前倍速。
@@ -28,6 +29,9 @@ class PlayerMoreState {
 
   /// 当前文字缩放比例。
   final double textScale;
+
+  /// 设备是否提供画中画入口。
+  final bool pipAvailable;
 }
 
 /// 更多面板动作集合。
@@ -39,6 +43,7 @@ class PlayerMoreActions {
     required this.onClear,
     required this.onDownload,
     required this.onReport,
+    this.onPip,
   });
 
   /// 倍速变化。
@@ -55,6 +60,9 @@ class PlayerMoreActions {
 
   /// 投诉当前剧。
   final VoidCallback onReport;
+
+  /// 进入画中画；平台不支持时为空。
+  final VoidCallback? onPip;
 }
 
 /// K29 播放页白色更多面板。
@@ -136,6 +144,13 @@ class _PlayerMoreSheetState extends State<PlayerMoreSheet> {
                 title: l10n.offlineCache,
                 onTap: () => _closeThen(widget.actions.onDownload),
               ),
+              if (widget.state.pipAvailable && widget.actions.onPip != null)
+                _enabledRow(
+                  key: const Key('player-more-pip'),
+                  icon: Icons.picture_in_picture_alt_rounded,
+                  title: l10n.pictureInPicture,
+                  onTap: () => _closeThen(widget.actions.onPip!),
+                ),
               _textSizeRow(l10n),
               _disabledRow(
                 key: const Key('player-more-cast'),