's'

config/domain.config.ts

@@ -11,6 +11,15 @@ export const ROOT_DOMAIN =
 export const AUTH_COOKIE_DOMAIN =
   process.env.AUTH_COOKIE_DOMAIN || `.${ROOT_DOMAIN}`;
 
+/** 根据请求 host 返回 Cookie domain。localhost 时不设 domain，生产环境用根域实现跨站 SSO */
+export function getAuthCookieDomain(request: { headers: { get: (name: string) => string | null } }): string | undefined {
+  const envDomain = process.env.AUTH_COOKIE_DOMAIN;
+  if (envDomain) return envDomain;
+  const host = request.headers.get("host") ?? "";
+  if (host.includes("localhost") || host.startsWith("127.0.0.1")) return undefined;
+  return AUTH_COOKIE_DOMAIN;
+}
+
 export const DEFAULT_PAYMENT_API_URL = isDev
   ? "http://127.0.0.1:8700"
   : `https://api.${ROOT_DOMAIN}`;