feat(web): 提取共享基础组件 — dayjs/format/EntityName/FilterBar/PageContainer/DrawerForm

- utils/dayjs.ts: 集中初始化 relativeTime 插件 + zh-cn locale
- utils/format.ts: formatDate/formatDateTime/formatRelative/calcAge
- components/EntityName.tsx: UUID→姓名兜底显示
- components/FilterBar.tsx: 统一筛选栏容器
- components/PageContainer.tsx: 统一页面容器（标题+筛选+表格+暗色模式）
- components/DrawerForm.tsx: 抽屉式表单容器（分组+双列网格）
- AlertList.tsx: 迁移到集中 dayjs 导入

apps/web/src/utils/dayjs.ts

@@ -0,0 +1,9 @@
+import dayjs from 'dayjs';
+import relativeTime from 'dayjs/plugin/relativeTime';
+import 'dayjs/locale/zh-cn';
+
+dayjs.extend(relativeTime);
+dayjs.locale('zh-cn');
+
+export { dayjs };
+export default dayjs;

apps/web/src/utils/format.ts

@@ -0,0 +1,16 @@
+import { dayjs } from './dayjs';
+
+export const formatDate = (v: string | null | undefined): string =>
+  v ? dayjs(v).format('YYYY-MM-DD') : '--';
+
+export const formatDateTime = (v: string | null | undefined): string =>
+  v ? dayjs(v).format('YYYY-MM-DD HH:mm') : '--';
+
+export const formatRelative = (v: string | null | undefined): string =>
+  v ? dayjs(v).fromNow() : '--';
+
+export const calcAge = (birthDate: string | null | undefined): string => {
+  if (!birthDate) return '--';
+  const age = dayjs().diff(dayjs(birthDate), 'year');
+  return `${age}岁`;
+};