Not avaiable out of the box, but you can use something like https://github.com/julianlam/nodebb-plugin-archiver or modify it to delete the topics instead of locking.
I have a problem, i can't change the category size.
By Defaut, the size is "col-md-3 col-xs-6". but when i put "col-md-12 col-xs-6" it doesn't change on a desktop
@LinSN Are you using the Lavender theme? The sizes do not effect the Lavender theme but they will change the size in a Vanilla based theme.
Yep i'm using Lavender ! There's a way to do something about it ?
@julian ah ok. The last time i tried it didn't change the size. That was a week or so ago though.