接入前端P0页面真实接口

client/src/services/healthService.ts

@@ -0,0 +1,6 @@
+import { getJson } from '@/services/httpClient'
+import type { BackendHealthResult } from '@/types/reservation'
+
+export async function fetchBackendHealth(): Promise<BackendHealthResult> {
+  return getJson<BackendHealthResult>('/api/health')
+}