Diff between commits should be more explicit about "before" and "after"

[feinstein]

Currently when I select 2 commits I get a diff view between them, but Fork stacks them up, one on top of the other, like:

I really struggle to understand who's the before and who's the after, like "if I apply this commit into this one, what's the final result?"

I think that the commit in the bottom is the "previous", and the one on top is the "after", as the commit history timeline, but I keep forgetting this.

Could we have a different UX/UI here, where at minimum we get an arrow -> pointing to the order of which the commits would be applied to each other?

[DanPristupov]

You can see the order in the header (red - source/before, green - destination/after):

[feinstein]

Sorry but I don't think people understand that red means source or before, red usually means "deleted". I think we can come up with a better UX, using something more universal, as an arrow.