https://blissos.org/

Khal is a nice tui calendar, maybe not for your needs like calendar.txt

What’s wrong with kitty?

I’ve been using kitty for some time didn’t had any issues, and multiplexing is useful.

PS: i used tmux for many years, and still use on headless

Passwords can be leaked, mostly by bad security on server side.

Passkeys use secure keys, it checks public keys on both sides and send private key to authenticate, without both keys can’t login or if the server is compromised.

It’s like GPG or SSH works.