ThemeCard
fun ThemeCard(modifier: Modifier = Modifier, onClick: () -> Unit? = null, contentPadding: PaddingValues = PaddingValues(MaterialTheme.kmpSpacing.medium), content: @Composable ColumnScope.() -> Unit)
An elevated, full-width card that stacks content with the standard gap. With onClick the whole card is one click target at least the Material minimum height; buttons inside content stay separately focusable. For a selectable card use SelectableCard; for a titled group use SectionCard.