I agree that the /category/ slug is not useful at all. Not useful from a Usability perspective and not useful from a SEO perspective.
But why not putting a URL value in the database for the categories to get rid of the id and the /category/ slug?
I agree, and to add to this: the /category/ and /topic/ slugs look a little bit weird on non-English installs of NodeBB. It would be nice if we can drop these for translation consistency.
I don't mind the number in the url; that is also helpful if two topics share the same name.
(Just wondering, is there an update for this request? ).
I need some help, I was wondering how could I change the "icon element" into a name, e.g. „Main Site” (screen number 1 - red square), and secondly, there's also in issue with content adjusting (screen number 2).