mod: 无障碍语义适配

lib/pages/fav_detail/view.dart

@@ -96,6 +96,7 @@ class _FavDetailPageState extends State<FavDetailPage> {
             ),
             actions: [
               IconButton(
+                tooltip: '搜索',
                 onPressed: () =>
                     Get.toNamed('/favSearch?searchType=0&mediaId=$mediaId'),
                 icon: const Icon(Icons.search_outlined),

lib/pages/fav_detail/widget/fav_video_card.dart

@@ -209,6 +209,7 @@ class VideoContent extends StatelessWidget {
                     right: 0,
                     bottom: -4,
                     child: IconButton(
+                      tooltip: '取消收藏',
                       style: ButtonStyle(
                         padding: MaterialStateProperty.all(EdgeInsets.zero),
                       ),