feat:增加主题色模块

lib/widgets/recipe/list.dart

@@ -82,9 +82,14 @@ class _RecipeListState extends State<RecipeList> {
           _buildSelectCategory(provider),
           SizedBox(height: 5),
           Expanded(
-            child: ListView.separated(
+            child: GridView.builder(
+              gridDelegate: const SliverGridDelegateWithFixedCrossAxisCount(
+                crossAxisCount: 2, // 每行2个
+                crossAxisSpacing: 8, // 水平间距
+                mainAxisSpacing: 8, // 垂直间距
+                childAspectRatio: 0.9,
+              ),
               itemCount: provider.recipeSummaryList.length,
-              separatorBuilder: (context, index) => SizedBox(height: 8),
               itemBuilder: (context, index) {
                 return RecipeCard(recipe: provider.recipeSummaryList[index]);
               },