[BUG]: Shadows for `Rectangle` are cut off when proportions are set for `Row`/`Column`

[Sn3llius]

Describe the bug

Shadows applied to Rectangles in Rows/Columns are cut off when custom proportions are set. This issue affects the visual display of shadows for rectangular shapes, causing them to appear incomplete.

Steps to Reproduce

class MyComponent(rio.Component):
    def build(self) -> rio.Component:
        return rio.Row(
            rio.Spacer(),
            rio.Rectangle(
                content=rio.Text("Hello World!"),
                fill=rio.Color.GREY,
                shadow_radius=3,
                shadow_color=rio.Color.BLACK,
                align_x=0.5,
                min_width=20,
            ),
            rio.Spacer(),
            proportions=[1, 10, 1], # <-- causes the issue
            align_y=0.5,
        )

Screenshots/Videos

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Operating System

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What browsers are you seeing the problem on?

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Browser version

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What device are you using?

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Additional context

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