KvadrantSurface
fun KvadrantSurface(modifier: Modifier = Modifier, color: Color = KvadrantTheme.colors.chrome, content: @Composable BoxScope.() -> Unit = {})
A flat, rectangular surface in the theme's chrome colour.
There is nothing to configure — no elevation, no corner radius, no tonal tint — and the absence is the component. Passing a colour is for the cases where a caller means a specific token.