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

client/src/components/common/CardSkeleton.tsx

@@ -1,13 +1,12 @@
 import { Skeleton } from "../ui/skeleton";
-import { Card } from "../ui/card";
 
 export function CardSkeleton({ lines = 6 }: { lines?: number }) {
   return (
-    <Card className="space-y-3 p-6">
+    <div className="card-std space-y-3 p-6">
       <Skeleton className="h-5 w-48" />
       {Array.from({ length: lines }, (_, i) => (
         <Skeleton key={i} className="h-4 w-full" />
       ))}
-    </Card>
+    </div>
   );
 }