feat(web): 告警管理前端页面 + 路由注册 + bugfix

新增:
- AlertList 告警列表页: 状态筛选/确认/忽略操作
- AlertRuleList 告警规则页: 创建/编辑/启停管理
- alerts + deviceReadings 前端 API 层
- App.tsx 路由注册 + MainLayout 标题 fallback
- wiki/frontend.md 更新页面清单

修复:
- ArticleEditor: 修复 unused variable 构建错误
- FollowUpTaskList: 修复 filter(Boolean) 类型窄化问题

apps/web/src/pages/health/FollowUpTaskList.tsx

@@ -123,10 +123,10 @@ export default function FollowUpTaskList() {
       }
 
       // Batch resolve assignee names
-      const assigneeIds = [...new Set(result.data.map((t: FollowUpTask) => t.assigned_to).filter(Boolean))];
+      const assigneeIds = [...new Set(result.data.map((t: FollowUpTask) => t.assigned_to).filter((x): x is string => !!x))];
       const newDoctorLabels: Record<string, string> = {};
       await Promise.allSettled(
-        assigneeIds.map(async (id: string) => {
+        assigneeIds.map(async (id) => {
           try {
             const u = await getUser(id);
             newDoctorLabels[id] = u.display_name || u.username;