🔧 chore(admin): remove word-preview feature

- 删除菜单中的Word预览选项
- 移除WordPreview页面路由配置
- 清理相关代码引用

src/client/admin-shadcn/menu.tsx

@@ -95,13 +95,6 @@ export const useMenu = () => {
       path: '/admin/files',
       permission: 'file:manage'
     },
-    {
-      key: 'word-preview',
-      label: 'Word预览',
-      icon: <FileText className="h-4 w-4" />,
-      path: '/admin/word-preview',
-      permission: 'file:manage'
-    },
     {
       key: 'analytics',
       label: '数据分析',

src/client/admin-shadcn/routes.tsx

@@ -8,7 +8,6 @@ import { DashboardPage } from './pages/Dashboard';
 import { UsersPage } from './pages/Users';
 import { LoginPage } from './pages/Login';
 import { FilesPage } from './pages/Files';
-import WordPreview from './pages/WordPreview';
 
 export const router = createBrowserRouter([
   {
@@ -46,11 +45,6 @@ export const router = createBrowserRouter([
         element: <FilesPage />,
         errorElement: <ErrorPage />
       },
-      {
-        path: 'word-preview',
-        element: <WordPreview />,
-        errorElement: <ErrorPage />
-      },
       {
         path: '*',
         element: <NotFoundPage />,