Fix UI Color Inconsistencies and Implement Customization Features

[ramisbahi]

Address UI-related issues and introduce new customization settings:

• Resolve the unexpected color change in the sidebar that transitions from blue to white, then to orange.
• Add a setting to allow users to customize the tree fanout for the Game of 24.
• Develop a UI element for displaying and editing AI evaluations and scores in the code generation visualization, similar to the approach used for Game of 24.
• Create a scaffold for AI evaluations to be displayed as editable cards, which would include the prompt involved in generating the evaluation.