diff --git a/frontend/src/lib/http.test.ts b/frontend/src/lib/http.test.ts
index b9fb5e9..ce057ae 100644
--- a/frontend/src/lib/http.test.ts
+++ b/frontend/src/lib/http.test.ts
@@ -21,8 +21,10 @@ globalThis.window = {
 }
 
 // 捕获每次 fetch 的入参供断言
+let lastUrl = ''
 let lastInit: RequestInit | undefined
-globalThis.fetch = async (_url: string, init?: RequestInit) => {
+globalThis.fetch = async (url: string | URL | Request, init?: RequestInit) => {
+  lastUrl = String(url)
   lastInit = init
   return new Response(JSON.stringify({ ok: true }), { status: 200, headers: { 'content-type': 'application/json' } })
 }
@@ -63,3 +65,19 @@ test('DELETE: method=DELETE, 无 body, 无 Content-Type', async () => {
   assert.equal(lastInit?.body, undefined)
   assert.equal((lastInit?.headers as Record<string, string>)?.['Content-Type'], undefined)
 })
+
+// ── 健康检查豁免: /health* 挂在根路径(后端 app.py 不在 /api/v1 下),
+// 加前缀会 404 → 管理后台右上角永远「系统异常」 ──
+test('build_url: /health 与 /health/ready 不加 /api/v1 前缀', async () => {
+  await http.get('/health')
+  assert.equal(lastUrl, '/health')
+  await http.get('/health/ready')
+  assert.equal(lastUrl, '/health/ready')
+})
+
+test('build_url: 常规 API 路径仍统一加 /api/v1', async () => {
+  await http.get('/admin/stats')
+  assert.equal(lastUrl, '/api/v1/admin/stats')
+  await http.get('/matches')
+  assert.equal(lastUrl, '/api/v1/matches')
+})
diff --git a/frontend/src/lib/http.ts b/frontend/src/lib/http.ts
index 251fdbc..c600f8d 100644
--- a/frontend/src/lib/http.ts
+++ b/frontend/src/lib/http.ts
@@ -17,22 +17,30 @@ export const UNAUTHORIZED_EVENT = 'profeto:unauthorized'
 const API_BASE = '/api/v1'
 const DEFAULT_TIMEOUT = 30_000
 
+/** 健康检查端点挂在根路径(app.py 不在 /api/v1 下,与 compose healthcheck 一致);
+ *  加前缀会 404,导致管理后台健康状态永远显示「系统异常」 */
+const ROOT_ONLY_PREFIXES = ['/health']
+
 /** 所有 API 路径统一走 /api/v1,避免浏览器直接请求 /matches 被 nginx 当 SPA 回退 */
 function build_url(path: string): string {
   if (path.startsWith('http')) return path
+  if (ROOT_ONLY_PREFIXES.some(p => path === p || path.startsWith(`${p}/`))) return path
   if (path.startsWith(API_BASE)) return path
   if (path.startsWith('/')) return `${API_BASE}${path}`
   return `${API_BASE}/${path}`
 }
 
 export class ApiError extends Error {
-  constructor(
-    message: string,
-    public status: number,
-    public data?: unknown,
-  ) {
+  status: number
+  data?: unknown
+
+  constructor(message: string, status: number, data?: unknown) {
     super(message)
     this.name = 'ApiError'
+    // 显式赋值而非构造函数参数属性(public x):strip-types 不支持后者,
+    // 会让 node --experimental-strip-types 跑 lib/http.test.ts 直接失败
+    this.status = status
+    this.data = data
   }
 }