New backend, resuming sessions

Changelog: Less spaghetti, more faster

While you were hard at work marking attendance thoughout the year, we were hard at work as well!

We are ready to present you a brand new, blazing fast backend in rust.

Assuming we did things correctly, the only thing you should notice is a “Resume session” button in your finished sessions.

That’s right, you now get to resume any session any time!

Report straight to us if anything goes wrong and have an awesome new year!