feat: 对接生图功能

Co-authored-by: Copilot <copilot@github.com>

server/api/auth/ready.get.ts

@@ -1,4 +1,5 @@
 import type { IUserReadyData } from "#shared/types";
+import { isUnauthorizedError } from "~~/server/utils";
 
 export default defineEventHandler(async (event) => {
   try {
@@ -17,20 +18,3 @@ export default defineEventHandler(async (event) => {
     return createUpstreamErrorResponse(error, "环境准备失败");
   }
 });
-
-/** 鉴权失败时清理本地 cookie，避免继续携带失效的 NewAPI 登录态 */
-const isUnauthorizedError = (error: unknown): boolean => {
-  const fetchError = error as {
-    response?: {
-      status?: number;
-    };
-    status?: number;
-    statusCode?: number;
-  };
-
-  return (
-    fetchError.statusCode === 401 ||
-    fetchError.status === 401 ||
-    fetchError.response?.status === 401
-  );
-};