This is super cool. Do you have any ideas around where users might store their keys? I think for a good UX, it would be cool to label the keys I.E.: 1. This is your client key, 2. This is your igloo key, 3. This is your recovery key. But honestly, this feels like nsec bunker but where the bunker can't sign for you by itself which I guess is where you are going with this.