fix(home): 首切频道预取并保留播放画面

lib/pages/player/player_view.dart

@@ -59,6 +59,7 @@ class PlayerPage extends StatefulWidget {
     this.onMenu,
     this.feedDramas,
     this.feedChannel,
+    this.headerChannel,
     this.onDramaChanged,
     this.onImmersiveChanged,
     this.onOpenFullPlayer,
@@ -82,6 +83,7 @@ class PlayerPage extends StatefulWidget {
   final VoidCallback? onMenu;
   final List<Drama>? feedDramas;
   final HomeFeedChannel? feedChannel;
+  final HomeFeedChannel? headerChannel;
   final ValueChanged<Drama>? onDramaChanged;
   final ValueChanged<bool>? onImmersiveChanged;
   final Future<void> Function(Drama drama, Episode episode)? onOpenFullPlayer;
@@ -295,7 +297,10 @@ class _PlayerPageState extends State<PlayerPage>
               bottom: false,
               child: HomeFeedHeader(
                 l10n: l10n,
-                channel: widget.feedChannel ?? HomeFeedChannel.recommend,
+                channel:
+                    widget.headerChannel ??
+                    widget.feedChannel ??
+                    HomeFeedChannel.recommend,
                 onChannelSelected: widget.onChannelSelected ?? (_) {},
                 onRefresh: () async {
                   final ok = await widget.onRefreshFeed?.call() ?? true;