Legacy migration

import { migrateLegacyRecord } from 'fatigue-kit/legacy'

const migrated = migrateLegacyRecord(raw)
if (migrated) {
  fatigue.importRecord(key, migrated.record)
  const rules = [{ max: 3, window: '7d' }]
  if (migrated.cooldownMs !== null) rules.push({ cooldown: migrated.cooldownMs })
}

The converter accepts JSON or { times, date, duration, todayCount }. It maps times to lifetime, places one approximate hit at the date’s local midnight, and returns duration days as an optional cooldown. todayCount cannot be reconstructed as individual timestamps. Invalid input or a missing usable date returns null; retain the legacy data until migration is verified.