Notifications page

I'd like to have a single page where I can see which issues and proposals have unread activity:

* new issues / proposals opened on my own projects

* comments on issues / proposals I have commented on before (with a way to unsubscribe)

I guess tracking which things have been read could be done with a browser cookie for now (with a button to "mark all read" in case you lose the cookie).

Currently I have to remind myself to browser to all open issues that I'm interested in. Or I might see an @ mention in my regular nostr client, but those can get buried.