// app/utils/fetch.ts - $fetch 请求工具

/** 从 `$fetch` 错误里提取安全文案；服务端已经保证 message/msg 不含敏感上游细节 */
export const getClientErrorMessage = (error: unknown, fallback: string) => {
  if (typeof error !== "object" || error === null) return fallback;

  const data = "data" in error ? (error as { data?: unknown }).data : undefined;
  if (typeof data === "object" && data !== null) {
    const message = (data as { message?: unknown; msg?: unknown }).message;
    const msg = (data as { message?: unknown; msg?: unknown }).msg;

    if (typeof message === "string" && message) return message;
    if (typeof msg === "string" && msg) return msg;
  }

  return fallback;
};