feat: 为模拟考试功能添加"待测试"标签

在首页的模拟考试卡片标题旁添加橙色"待测试"标签，以醒目地标识该功能当前处于测试阶段。

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

web/src/pages/Home.tsx

@@ -1,6 +1,6 @@
 import React, { useEffect, useState } from 'react'
 import { useNavigate } from 'react-router-dom'
-import { Typography, message, Space, Avatar, Button, Modal, Form, Radio, Alert, Input, Switch, InputNumber, Dropdown, Row, Col, Card } from 'antd'
+import { Typography, message, Space, Avatar, Button, Modal, Form, Radio, Alert, Input, Switch, InputNumber, Dropdown, Row, Col, Card, Tag } from 'antd'
 import type { MenuProps } from 'antd'
 import {
   FileTextOutlined,
@@ -564,7 +564,9 @@ const Home: React.FC = () => {
                   <FileTextOutlined className={styles.quickIcon} style={{ color: '#fa8c16' }} />
                 </div>
                 <div style={{ flex: 1 }}>
-                  <Title level={5} style={{ margin: 0 }}>模拟考试</Title>
+                  <Title level={5} style={{ margin: 0 }}>
+                    模拟考试 <Tag color="orange">待测试</Tag>
+                  </Title>
                   <Paragraph type="secondary" style={{ margin: 0, fontSize: '13px' }}>随机组卷，在线答题或打印试卷</Paragraph>
                 </div>
               </Space>