BUG修复，返回结构统一

client/src/components/CodePreview.vue

@@ -358,7 +358,13 @@ const runCode = async () => {
         })
       })
       
-      const result = await response.json()
+      if (!response.ok) {
+        const errorData = await response.json()
+        throw new Error(errorData.message || '代码执行失败')
+      }
+      
+      const data = await response.json()
+      const result = data.result // 从统一响应格式中提取 result
       
       let outputHtml = ''
       if (result.error) {

client/src/components/Header.vue

@@ -93,7 +93,9 @@ const navigate = (target: string) => {
 const updateActiveNav = () => {
   const path = route.path
   if (path === '/') activeNav.value = 'home'
-  else if (path === '/blog') activeNav.value = 'blog'
+  else if (path === '/blog' || path.startsWith('/blog/')) activeNav.value = 'blog'
+  else if (path === '/columns' || path.startsWith('/columns/')) activeNav.value = 'columns'
+  else if (path === '/categories' || path.startsWith('/categories/')) activeNav.value = 'categories'
   else if (path === '/works' || path.startsWith('/works/')) activeNav.value = 'works'
   else if (path === '/snippets') activeNav.value = 'snippets'
   else if (path === '/services') activeNav.value = 'services'

client/src/components/admin/AdminLayout.vue

@@ -199,6 +199,8 @@ const menuItems = ref<MenuItem[]>([
     isOpen: true,
     children: [
       { title: '文章管理', path: '/admin/posts', icon: '📝' },
+      { title: '分类管理', path: '/admin/categories', icon: '📂' },
+      { title: '专栏管理', path: '/admin/columns', icon: '📚' },
       { title: '作品管理', path: '/admin/works', icon: '🎨' },
       { title: '代码片段', path: '/admin/snippets', icon: '💻' },
       { title: '标签管理', path: '/admin/tags', icon: '🏷️' }