[FEATURE]: Ability to fork/revert in desktop app

[Killusions]

Feature hasn't been suggested before.

• I have verified this feature I'm about to request hasn't been suggested before.

Describe the enhancement you want to request

The desktop app almost has feature parity with the CLI for most common uses, but the lack of revert and fork of user messages really make it hard to use, as it's pretty common for me to revert the last message or fork a thread.

Filed a very minimal PR for this #8914

[github-actions]

This issue might be a duplicate of existing issues. Please check:

• [FEATURE]: ability to revert/fork from the ai message, not only from the user's #8689: [FEATURE]: ability to revert/fork from the ai message, not only from the user's - Discusses revert/fork functionality and feature parity between CLI and desktop

Feel free to ignore if none of these address your specific case.

[Killusions]

Filed a very minimal PR for this #8914