Not possible to export the keys with a save dialog -- just a straight download. Eh.
It's pretty confusing which keypair you're saving and loading. How does this feed differ from the main feed? Why would somebody want to save/load this feed? Etc. I don't think having users manually manage their keypairs as files is a good idea at all.
Create a module for setting up the feed and seeing the feed status. Should be reusable in other apps.