refactor(ui): [UI8] 补齐全局异常卡片边距并统一剩余下拉表单样式

client/src/components/common/EmptyStateCard.tsx

@@ -8,7 +8,7 @@ type EmptyStateCardProps = {
 
 export function EmptyStateCard({ title, description, footer }: EmptyStateCardProps) {
   return (
-    <section className="card-std">
+    <section className="card-std p-8">
       <h3 className="card-title">{title}</h3>
       <p className="card-desc">{description}</p>
       {footer ? <div className="mt-4">{footer}</div> : null}