factor:布局颜色重构

lib/pages/blog_page.dart

@@ -80,13 +80,14 @@ class _BlogPageState extends State<BlogPage> {
     if (provider.error != null) {
       return buildErrorInfo(
         errorInfo: provider.error!,
-        onPressed: () => provider.refreshBlogList,
+        onPressed: () => provider.refreshBlogList(),
       );
     }
 
     return ListView.separated(
       controller: _scrollController,
       itemCount: provider.blogList.length,
+      separatorBuilder: (context, index) => SizedBox(height: 8),
       itemBuilder: (context, index) {
         final blog = provider.blogList[index];
         return InkWell(
@@ -94,9 +95,6 @@ class _BlogPageState extends State<BlogPage> {
           child: BlogCard(blog: blog),
         );
       },
-      separatorBuilder: (BuildContext context, int index) {
-        return SizedBox(height: 8);
-      },
     );
   }