数据结构优化

client/src/components/admin/AdminLayout.vue

@@ -234,13 +234,22 @@ const menuItems = ref<MenuItem[]>([
       { title: '角色管理', path: '/admin/roles', icon: '🔒' }
     ]
   },
+  {
+    title: '附件管理',
+    icon: '📎',
+    isOpen: false,
+    children: [
+      { title: '附件库', path: '/admin/attachments', icon: '📦' },
+      { title: '附件分类管理', path: '/admin/attachment-categories', icon: '📂' },
+      { title: 'OSS配置', path: '/admin/oss-configs', icon: '☁️' }
+    ]
+  },
   {
     title: '系统设置',
     icon: '⚙️',
     isOpen: false,
     children: [
       { title: '全局配置', path: '/admin/settings', icon: '🛠️' },
-      { title: '附件管理', path: '/admin/attachments', icon: '📎' },
       { title: '操作日志', path: '/admin/logs', icon: '📋' }
     ]
   }