refactor(web): 统一 dayjs 导入为集中初始化 — 11 个文件

所有 health 页面从 import dayjs from 'dayjs' 迁移到
import { dayjs } from '.../utils/dayjs'，确保 relativeTime
和 zh-cn locale 全局生效。

apps/web/src/pages/health/components/VitalSignsTab.tsx

@@ -2,7 +2,7 @@ import { useCallback, useState, useMemo } from 'react';
 import { Table, Button, Modal, Form, InputNumber, DatePicker, Input, message, Typography, Tooltip, Popconfirm, Space } from 'antd';
 import { PlusOutlined, InfoCircleOutlined, EditOutlined, DeleteOutlined } from '@ant-design/icons';
 import type { Dayjs } from 'dayjs';
-import dayjs from 'dayjs';
+import { dayjs } from '../../../utils/dayjs';
 import { healthDataApi } from '../../../api/health/healthData';
 import type { VitalSigns } from '../../../api/health/healthData';
 import { VitalSignsChart } from './VitalSignsChart';