## Description
Disables the commit message editor while the async commit (and optional
push / create-PR chain) is in flight, so the user can't edit the message
text mid-operation.
Fixes APP-4260.
## Testing
Manually verified the editor is locked once "Confirm" is pressed and
stays locked through the async commit/push/PR flow.
## Agent Mode
- [x] Warp Agent Mode - This PR was created via Warp's AI Agent Mode
CHANGELOG-BUG-FIX: Disabled the commit message editor while a git commit
is being performed in the git operations dialog.
[Conversation](https://staging.warp.dev/conversation/11795cb8-3dcc-4bcd-90c9-53f974585fe6)
Co-Authored-By: Oz <oz-agent@warp.dev>
Co-authored-by: Oz <oz-agent@warp.dev>