Add missing route directories

We have some dead route directories that result in 404's. We can limit them by making redirects. 

e.g. [https://openuserjs.org/user/~~preferences~~](https://openuserjs.org/user/preferences) -> https://openuserjs.org/user/

I also cleaned up some routes.

_Question: should we use the function `app_route` for all routes? I'm wondering if it causes overhead..._