N/2+1 as default, but customizable like in SLIP-0039 spec

[1000i100]

I asked it some years ago in this project :
https://github.com/seedhodler/seedhodler/issues/125

For the UI, ideally it would look like this :

with 3 grey dot as drag area to add or remove shards.

And to be SLIP-0039 fully compliant, and advanced version would look like :

With each group (column) with user choosen custom name to print.
At print, it would be generalSeedName, group groupName writen on each page, to help recovery process.

But i'm not sure it's usefull to be SLIP-0039 compliant, i think the simple UI can do the job ;)