export function isAbortError(err: unknown): boolean {
  if (!err || typeof err !== "object") return false;
  const name = "name" in err ? String(err.name) : "";
  if (name === "AbortError") return true;
  const message =
    "message" in err && typeof err.message === "string"
      ? err.message.toLowerCase()
      : "";
  return message.includes("aborted");
}