makepad-2.0-layout

Use a View with `flow: Down` to stack children vertically, combined with `spacing` for gaps and `padding` for inner margins. Always set `height: Fit` on the container so it shrinks to its content instead of resolving to zero pixels.

The container is missing `height: Fit`. The default height is Fill, and Fill inside a Fit parent creates a circular dependency that resolves to 0 pixels. Add `height: Fit` to every View, SolidView, and RoundedView unless the parent has a fixed or Fill height.

Fill makes a widget take all remaining space in its parent, while Fit shrinks the widget to its content size. Use Fill for main content areas and root widths, and Fit for buttons, labels, cards, and most containers.

ScrollYView must use `height: Fill`, not `height: Fit`. With Fit it expands to fit all content, leaving nothing to scroll. Fill gives it a fixed viewport within which the content scrolls.

Containers with a background (SolidView, RoundedView) need `new_batch: true` when they contain text children. Without it, GPU draw call batching renders the text behind the background.

Never place Filler next to a `width: Fill` sibling, because both compete for remaining space and split it 50/50, clipping text. Use Filler only between `width: Fit` siblings, or give the text element `width: Fill` to push others aside naturally.