diff --git a/server/internal/httpapi/cors.go b/server/internal/httpapi/cors.go
index 752f046..56f4bac 100644
--- a/server/internal/httpapi/cors.go
+++ b/server/internal/httpapi/cors.go
@@ -35,7 +35,10 @@ func NewCORS() func(http.Handler) http.Handler {
 				h.Set("Access-Control-Allow-Origin", origin)
 				h.Add("Vary", "Origin")
 				h.Set("Access-Control-Allow-Methods", "GET, POST, PUT, PATCH, DELETE, OPTIONS")
-				h.Set("Access-Control-Allow-Headers", "Content-Type, Authorization")
+				// X-Refresh-Token:静默续期/登出把 refresh token 放在此自定义头里
+				// (header token 方案,见 web/usercenter/lib/api/http.ts)。不放行则浏览器
+				// 预检拦截 /v1/auth/refresh → 登录后一刷新即掉线(login 不带此头故不受影响)。
+				h.Set("Access-Control-Allow-Headers", "Content-Type, Authorization, X-Refresh-Token")
 				h.Set("Access-Control-Max-Age", "600")
 			}
 			// 预检请求直接 204(不落到业务路由,避免 /v1/... 的 OPTIONS 404)。
diff --git a/server/internal/httpapi/cors_test.go b/server/internal/httpapi/cors_test.go
index 78727f0..390f3c0 100644
--- a/server/internal/httpapi/cors_test.go
+++ b/server/internal/httpapi/cors_test.go
@@ -3,6 +3,7 @@ package httpapi
 import (
 	"net/http"
 	"net/http/httptest"
+	"strings"
 	"testing"
 )
 
@@ -35,6 +36,11 @@ func TestCORS(t *testing.T) {
 	if w.Header().Get("Access-Control-Allow-Methods") == "" {
 		t.Fatalf("preflight missing Allow-Methods")
 	}
+	// 静默续期/登出把 refresh token 放 X-Refresh-Token 头,必须在允许头里,
+	// 否则浏览器预检拦截 /v1/auth/refresh → 登录后一刷新即掉线。
+	if ah := w.Header().Get("Access-Control-Allow-Headers"); !strings.Contains(ah, "X-Refresh-Token") {
+		t.Fatalf("preflight Allow-Headers must include X-Refresh-Token, got %q", ah)
+	}
 
 	// 未白名单 Origin:不补 Allow-Origin。
 	r = httptest.NewRequest("POST", "/v1/auth/login", nil)