chore: 完成全量功能迭代与部署准备

- 移除冗余依赖包
- 新增账号禁用校验与用户管理能力
- 新增文档下载与管理页面文件展示
- 新增API文档页面与用户管理前端页面
- 重构时区处理与docker-compose部署配置
- 完善测试用例与项目文档

frontend/src/layouts/MainLayout.vue

@@ -13,7 +13,9 @@ import {
   MenuFoldOutlined,
   MenuUnfoldOutlined,
   LogoutOutlined,
-  DatabaseOutlined
+  DatabaseOutlined,
+  ApiOutlined,
+  TeamOutlined
 } from '@ant-design/icons-vue'
 import { useAuthStore } from '@/stores/useAuthStore'
 
@@ -30,14 +32,21 @@ const selectedKeys = computed(() => {
 
 const openKeys = ref(['main'])
 
-const menuItems = [
-  { key: 'overview', icon: () => h(DashboardOutlined), label: '概览' },
-  { key: 'documents', icon: () => h(FileTextOutlined), label: '文档管理' },
-  { key: 'ingest', icon: () => h(UploadOutlined), label: '文档入库' },
-  { key: 'search', icon: () => h(SearchOutlined), label: '检索测试台' },
-  { key: 'categories', icon: () => h(AppstoreOutlined), label: '类目列表' },
-  { key: 'settings', icon: () => h(SettingOutlined), label: '设置' }
-]
+const menuItems = computed(() => {
+  const items = [
+    { key: 'overview', icon: () => h(DashboardOutlined), label: '概览' },
+    { key: 'documents', icon: () => h(FileTextOutlined), label: '文档管理' },
+    { key: 'ingest', icon: () => h(UploadOutlined), label: '文档入库' },
+    { key: 'search', icon: () => h(SearchOutlined), label: '检索测试台' },
+    { key: 'categories', icon: () => h(AppstoreOutlined), label: '类目列表' },
+    { key: 'settings', icon: () => h(SettingOutlined), label: '设置' },
+    { key: 'api-docs', icon: () => h(ApiOutlined), label: 'API 说明' }
+  ]
+  if (authStore.isAdmin) {
+    items.push({ key: 'users', icon: () => h(TeamOutlined), label: '用户管理' })
+  }
+  return items
+})
 
 function handleMenuClick({ key }) {
   if (key && key !== route.name) {