's'

app/lib/auth-cookie-domain.ts

@@ -0,0 +1,11 @@
+/**
+ * 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 process.env.AUTH_COOKIE_DOMAIN || ".hackrobot.cn";
+}