feat(flutter): 剧场搜索框改白底并新增榜单新剧预约页

lib/pages/discover/widgets/discover_search_field.dart

@@ -74,7 +74,7 @@ class _DiscoverSearchFieldState extends State<DiscoverSearchField> {
         height: _searchHeight,
         padding: const EdgeInsets.symmetric(horizontal: _searchPadding),
         decoration: BoxDecoration(
-          color: _focused ? AppColors.card : AppColors.commentInput,
+          color: AppColors.card,
           borderRadius: BorderRadius.circular(_searchRadius),
           border: Border.all(
             color: _focused ? AppColors.blue : Colors.transparent,