Ability to reset the changes tab after a commit

### Feature summary

_No response_

### What problem are you trying to solve?

I have a session where multiple commits were made. In the changes tab, I can still see all changes that were made in the session against the latest dev commit.

Would it be possible to reset the changes tab after a commit? Basically, I assumed that the UI would reflect "git status" with untracked changes and staged changes.

In my case, the GitHub Copilot app made a commit and I wanted it to change a specific line in a file. Since the changes tab still show all changes, finding the changed line it a bit annoying right now

### Proposed solution

_No response_

### Workflow impact

_No response_

### Installation context

_No response_

### Additional context

_No response_

Start at the app's changes tab behavior around commits and compare what it displays with git status for untracked and staged changes. Done means a commit resets the tab so it shows only changes made afterward, including when another line is edited in the same session.

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