Focus return. Esc (or Back) leaves the card detail with that card focused on the board, so keyboard users never lose their place.
Command chips. Post-commit commands render as code chips with "Copy command" buttons that name what they copy.
Fixed
Done-but-dirty review. Completed cards with fresh uncommitted changes show the Diff panel again for evaluation, while the commit action stays in Git changes: evaluate in Diff, act in Git changes.