I have set up all of the proper permissions for our client to edit categories, and this is working. But so far as I can tell, there is no way to give access to the Admin -> Channel Settings -> Categories section without giving them access to the Channel Settings, Channel Fields, etc.
What I am needing is for my client to be able to see, arrange, and edit categories without having to go to an entry and switch to the categories tab. Add-ons welcome.