Discrepancy in Radius Interpretation Between RectangleShape and RectangleItem

There is a noticeable difference in the way overlapping radius is interpreted between RectangleShape and RectangleItem. This discrepancy was observed when adapting the radius calculation from Figma.

Steps to Reproduce:

1. Create a rectangle in Figma with a radius larger than the actual item's dimensions.
2. Observe how Figma distributes the radius for one edge by percentage.
3. Implement the same configuration in RectangleShape and RectangleItem.

Expected Result: The radius should be distributed similarly to Figma, where the radius is proportionally adjusted based on the item's dimensions.

Actual Result: The radius interpretation differs between RectangleShape and RectangleItem, leading to inconsistent visual representation.