refactor(ui): [UI8] 彻底移除遗留Card并补充下拉框中文化

client/src/pages/UserManagementPage.tsx

@@ -16,7 +16,6 @@ import {
 } from "../api/users";
 import { PageHeader } from "../components/common/PageHeader";
 import { Button } from "../components/ui/button";
-import { Card } from "../components/ui/card";
 import { Input } from "../components/ui/input";
 import { Table, TableBody, TableCell, TableHead, TableHeader, TableRow } from "../components/ui/table";
 import { toast } from "sonner";
@@ -177,7 +176,7 @@ export function UserManagementPage() {
         </p>
       ) : null}
 
-      <Card className="space-y-4 p-6">
+      <div className="card-std space-y-4 p-6">
         <div className="flex flex-wrap items-center gap-2">
           <Input
             data-testid="users-search"
@@ -298,7 +297,7 @@ export function UserManagementPage() {
           onPageChange={setPage}
           testIdPrefix="users"
         />
-      </Card>
+      </div>
 
       <UserRoleDialog
         open={Boolean(roleDialogUser)}