Move dsh to a new computer

undohaven login && undohaven migrate-machine --to <snapshot-id>. On the new machine, log in with the same passphrase and migrate. Pro includes this. The passphrase unwraps the data key; UndoHaven never sees it.

把 dsh 搬到新电脑。在新电脑上用同一口令登录再迁移。这是专业版功能。口令只在本地解开数据密钥。