agent: Show checkpoints as soon as the model edits files (#56611)

Makes it so that "Restore checkpoint" shows up as soon as the model
performs an edit, instead of waiting until the turn ends

Release Notes:

- Fixed the agent panel to show "Restore checkpoint" as soon as the
agent starts editing instead of waiting until the turn ends
495f8ba717Bennet Bo Fenner committed on 5/13/2026, 9:35:49 AM· committed by GitHubparent394f022
1 file changedLine totals unavailable