ShowDetailScreen.kt

@Composable
fun ShowDetailScreen(
    viewModel: ShowDetailViewModel = hiltViewModel(),
    ...
) {
    ...
    val showCast = viewModel.showCast.observeAsState()
    
    Surface(
        modifier = Modifier
            .fillMaxSize()
    ) {

        Column {
            Box(modifier = Modifier.fillMaxSize()) {
                DetailArea(
                    ...
                    showCast = showCast.value,
                    onCastItemClick = { onCastItemClick(it) },
                    ...
                )

                if (isLoading.value == true) {
                    LinearProgressIndicator(
                        modifier = Modifier
                            .padding(8.dp)
                            .fillMaxWidth()
                    )
                }
            }
        }
    }
}