sorry for the late response, I’ll try to answer all of your questions:
1. The web interface is a free CSS that I’m using via perl templates plugin that allows me to easily draw any menu I want.
2. yes it’s all of those are included
3. I’ve used kiwi to build the installation
4. any help is welcome, I’m not looking , it’s just a hobby.
5. you can. but why do you need zfs when you have BRTFS ?
I’d be happy to answer any other question.