Given that it's Nostr, the gif button should be configurable to select from a variety of existing gif sites, as well as from a user-curated library, either in local storage or in a directory on their own web server.

We shouldn't just be cloning the centralized platforms, we should be outdoing them. 

 And...yea, it'll need some sort of tagging to make those self-curated libraries worthwhile. I'm coming up with ideas, not implementations :-)