export function formatDate(isoString, format = 'YYYY-MM-DD HH:mm:ss') {
  if (!isoString) return ''
  const date = new Date(isoString)
  if (isNaN(date.getTime())) return ''

  const pad = (n) => n.toString().padStart(2, '0')

  const map = {
    YYYY: date.getFullYear().toString(),
    MM: pad(date.getMonth() + 1),
    DD: pad(date.getDate()),
    HH: pad(date.getHours()),
    mm: pad(date.getMinutes()),
    ss: pad(date.getSeconds())
  }

  return format.replace(/YYYY|MM|DD|HH|mm|ss/g, token => map[token])
}