Prompt Enhancement Button

Add a 1-click prompt enhancement button (like Augment Code). Uses a secondary, user-configurable AI model to improve user input prompt. It includes an undo option (undo button appears, and Ctrl+Z works).

By default the model used should be a quicker/cheaper model (configurable) and the user can edit the default enhancement instructions in settings.

• UI/UX: An "Enhance" button in the input area will rewrite the prompt in 1 click, and an "Undo" button will appear next to it to revert the change instantly. (maybe even back/forward arrows to go back and forth, or even retry enhancement for multiple a/b/c prompt comparison with arrows)

• Benefits: This will improve model output quality, gives quicker/easier control over prompt engineering