layout

PreferenceKey enables child views to pass data up to ancestors, complementing the typical parent-to-child flow. I define a custom preference key by conforming to PreferenceKey protocol with a defaultValue and reduce method that combines multiple value

GeometryReader provides parent view size and coordinates, enabling dynamic layouts that adapt to available space. The reader passes a GeometryProxy with size and coordinate space info. I use it for responsive designs—calculate grid columns based on wi