Fix revert button to actually discard changes on staged files

[thisisharsh7]

The "Revert file changes" button wasn't working correctly for staged files. It would only unstage them instead of actually discarding the changes, making it functionally identical to the unstage button.

fixes #1022

[vercel]

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[greptile-apps]

Greptile Summary

Fixed the revertFile function to actually discard changes on staged files instead of just unstaging them. The previous code checked if a file was staged and only ran git reset HEAD which kept working directory changes, making it functionally identical to the unstage button. The fix removes this check, allowing git checkout HEAD to properly restore the file from HEAD and discard all changes (both staged and unstaged).

Confidence Score: 5/5

• This PR is safe to merge with minimal risk
• The change is a straightforward bug fix that removes incorrect logic. The fix correctly makes the revert button discard all changes (both staged and unstaged) instead of just unstaging files. The implementation uses standard git commands and properly handles edge cases.
• No files require special attention

Important Files Changed

Filename	Overview
src/main/services/GitService.ts	Removed staged file check to fix revert behavior - now properly discards all changes instead of just unstaging

_{Last reviewed commit: ce4193b}