Control Module for UI Components

MAIN REQUEST: I want a way to specify the “look” of my apps. I would want a control module to set up and update /edit the look and styles of the design system of my webapp. The controls should look like Figma control with ui controls to edit the corner radius, type styles for text hiearchy, color (make it like the “Appearance“ panel in Figma, or like how Framer has similar controls).

ALSO: I want a way to specify the DEFAULT “look” of my apps. Oftentimes the first iteration that gets generated by Base44 for me is an ugly darkmode with ugly purple gradients. I would want that module i described to control the default look of before the first version gets started.