feat(web): 危急值阈值 + 诊断记录 Web UI — Phase 2b-2/2b-3

危急值阈值：CRUD 列表页（指标/方向/阈值/级别/科室/年龄范围）
诊断记录：患者范围 CRUD 列表页（ICD编码/类型/状态/确诊日期）

apps/web/src/layouts/MainLayout.tsx

@@ -118,6 +118,8 @@ const routeTitleFallback: Record<string, string> = {
   '/health/medications': '药物记录',
   '/health/ble-gateways': 'BLE 网关管理',
   '/health/ble-gateways/:id': '网关详情',
+  '/health/critical-value-thresholds': '危急值阈值',
+  '/health/diagnoses': '诊断记录',
 };
 
 function getTitleFromMenus(path: string, menus: MenuInfo[]): string | undefined {