Wow this looks really nice! The AI-grouped (and described) file changes is something I have never seen before, and I thought I'd seen everything in code review.

A lot of what you're doing is similar to what I've been trying to achieve with CodeApprove (https://codeapprove.com) which brings Google's code review workflow (Critique) to everyone using GitHub. It's not doing any of the AI stuff, just focusing on conversation resolution, managing assignment, and giving a much more "power user" UX to the whole thing.

If you ever want to chat about code review, just shoot me an email.