KvadrantTile
fun KvadrantTile(size: TileSize = TileSize.Medium, modifier: Modifier = Modifier, color: Color = KvadrantTheme.colors.accent, onClick: () -> Unit = {}, interactionSource: MutableInteractionSource? = null, content: @Composable BoxScope.() -> Unit = {})
A Start-screen tile: a flat rectangle of accent colour that tilts towards the finger.
No corner radius, no shadow, no ripple — and nothing here says so, because the theme already does. The only thing a tile adds over a coloured box is its size and the press target.