fix(recommend): 修正进度取消状态更新编译错误

docs/plans/PROGRESS.md

@@ -1185,3 +1185,4 @@ $ flutter test
 - 简介「展开/收起」沿用现有三语文案；进度条热区恢复 24 并接入拖动自动清屏与预览卡片。
 - 拖动期间隐藏操作栏、文字及根底栏，顶部导航常驻；松手后持续清屏直到点击画面。
 - 进度条固定中心并动画到 6 高，时间气泡限制在左右 12；按当前流程未执行 analyze/test。
+- 修复 `scrubCancelRequest` 误置于 `initState` 的编译错误，并清理推荐页未使用变量；`flutter analyze` 无问题。

lib/pages/player/player_view.dart

@@ -138,9 +138,6 @@ class _PlayerPageState extends State<PlayerPage>
       downloads: widget.downloads,
     );
     logic.attach(widget, isMounted: () => mounted);
-    if (oldWidget.scrubCancelRequest != widget.scrubCancelRequest) {
-      _cancelFeedScrub();
-    }
     _thumbnailService = PlaybackThumbnailService(
       sourceResolver: _resolveThumbnailSource,
     );
@@ -156,6 +153,9 @@ class _PlayerPageState extends State<PlayerPage>
   void didUpdateWidget(covariant PlayerPage oldWidget) {
     super.didUpdateWidget(oldWidget);
     logic.attach(widget, isMounted: () => mounted);
+    if (oldWidget.scrubCancelRequest != widget.scrubCancelRequest) {
+      _cancelFeedScrub();
+    }
     final channelChanged = oldWidget.feedChannel != widget.feedChannel;
     final feedChanged =
         _feedSignature(oldWidget.feedDramas) !=

lib/pages/recommend/recommend_page.dart

@@ -48,7 +48,6 @@ class _RecommendPageState extends State<RecommendPage> {
 
   @override
   Widget build(BuildContext context) {
-    final l10n = AppLocalizations.of(context)!;
     final categories = context.read<CategoryController>();
     return ColoredBox(
       key: const Key('recommend-page'),