Function getApiErrorMessage

src/utils/api-error-message.ts:24–38

(error: unknown, fallback: string)

 * then `fallback`.
 */
export function getApiErrorMessage(error: unknown, fallback: string): string {
  const body = getApiErrorBody(error);

  if (body && typeof body === "object") {
    const { message, detail } = body as {
      message?: unknown;
      detail?: unknown;
    };
    if (typeof message === "string" && message) return message;
    if (typeof detail === "string" && detail) return detail;
  }

  if (error instanceof Error && error.message) return error.message;
  return fallback;
}