function getCurrentTime(): string {
  const now = new Date()
  const pad = (n: number, len: number = 2) => String(n).padStart(len, '0')
  const year = now.getFullYear()
  const month = pad(now.getMonth() + 1)
  const day = pad(now.getDate())
  const hours12 = pad(now.getHours() % 12 || 12) // 12小时制
  const minutes = pad(now.getMinutes())
  const seconds = pad(now.getSeconds())
  const milliseconds = pad(now.getMilliseconds(), 3)

  return `${year}-${month}-${day} ${hours12}:${minutes}:${seconds}.${milliseconds}`
}