diff --git a/go/internal/api/middleware/auth.go b/go/internal/api/middleware/auth.go
index 657c3fc..6f99340 100644
--- a/go/internal/api/middleware/auth.go
+++ b/go/internal/api/middleware/auth.go
@@ -129,8 +129,9 @@ func Auth(next http.Handler) http.Handler {
 	}
 
 	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		// /health, /metrics, /static/* 不需要认证
-		if r.URL.Path == "/health" || r.URL.Path == "/metrics" || strings.HasPrefix(r.URL.Path, "/static/") {
+		// /health, /metrics, /static/*, / 不需要认证（/ 供 Web UI 使用）
+		if r.URL.Path == "/health" || r.URL.Path == "/metrics" ||
+			strings.HasPrefix(r.URL.Path, "/static/") || r.URL.Path == "/" {
 			next.ServeHTTP(w, r)
 			return
 		}