fix: 移除快速审批页面中重复的 return 语句

修复白屏问题：
- 移除组件末尾的重复 return 语句
- 这些代码是死代码，导致组件无法正常渲染

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

frontend/src/pages/approval/quick-action.tsx

@@ -152,36 +152,3 @@ export default function QuickAction() {
     </div>
   )
 }
-
-  return (
-    <div style={{
-      display: 'flex',
-      flexDirection: 'column',
-      alignItems: 'center',
-      justifyContent: 'center',
-      height: '100vh',
-      background: '#f5f5f5'
-    }}>
-      {loading && (
-        <>
-          <SpinLoading color='primary' />
-          <p style={{ marginTop: '16px', color: '#999' }}>处理中...</p>
-        </>
-      )}
-
-      {status === 'success' && (
-        <>
-          <div style={{ fontSize: '48px' }}>✅</div>
-          <p style={{ marginTop: '16px', color: '#52c41a' }}>操作成功</p>
-        </>
-      )}
-
-      {status === 'error' && (
-        <>
-          <div style={{ fontSize: '48px' }}>❌</div>
-          <p style={{ marginTop: '16px', color: '#ff4d4f' }}>操作失败</p>
-        </>
-      )}
-    </div>
-  )
-}