export function normalizeWechatName(value) {
  const name = String(value ?? '').trim();
  if (!name || /^wx_[a-z0-9_]{4,64}$/i.test(name)) return '';
  return name;
}

export function resolveWechatAddressName(user) {
  return normalizeWechatName(user?.nickname) || normalizeWechatName(user?.displayName) || '';
}