Im torn on if I want to add a full "diff tool" into this - or if i should figure out how to integrate (open in) existing "best of breed" diff tools. Leaning towards the latter to keep the app simple and good at its core job. I might explore using the resolve conflict view for diff though (since it ~already shows diffs in order to resolve conflicts).
Appreciate the feedback, hope you enjoy using TinyGit and keep an eye out for updates!