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

client/src/pages/MobileApprovalsPage.tsx

@@ -15,7 +15,6 @@ import {
 import { PageHeader } from "../components/common/PageHeader";
 import { Button } from "../components/ui/button";
 import { Spinner } from "../components/ui/spinner";
-import { Card } from "../components/ui/card";
 import { Textarea } from "../components/ui/textarea";
 
 type MobileAction = "approve" | "reject" | "return" | "transfer";
@@ -107,7 +106,7 @@ export function MobileApprovalsPage() {
         <p className="rounded-lg border border-red-200 bg-red-50 px-3 py-2 text-sm text-red-600">{error}</p>
       ) : null}
 
-      <Card className="space-y-3 p-4" data-testid="mobile-approvals-list">
+      <div className="card-std space-y-3 p-4" data-testid="mobile-approvals-list">
         <h3 className="text-base font-semibold text-zinc-900">待办任务</h3>
 
         {tasksQuery.isLoading ? <div className="flex items-center gap-2 text-sm text-zinc-500"><Spinner size="sm" />加载中...</div> : null}
@@ -135,9 +134,9 @@ export function MobileApprovalsPage() {
             </button>
           ))}
         </div>
-      </Card>
+      </div>
 
-      <Card className="space-y-3 p-4" data-testid="mobile-approvals-detail">
+      <div className="card-std space-y-3 p-4" data-testid="mobile-approvals-detail">
         <h3 className="text-base font-semibold text-zinc-900">任务详情与动作</h3>
 
         {!selectedTaskId ? <p className="text-sm text-zinc-500">请先选择任务。</p> : null}
@@ -229,7 +228,7 @@ export function MobileApprovalsPage() {
             </div>
           </>
         )}
-      </Card>
+      </div>
     </div>
   );
 }