NavGraph.kt

@Composable
fun NavGraph(startDestination: String = "Home") {
    val navController = rememberNavController()
    val actions = remember(navController) { Actions(navController) }
    NavHost(navController = navController, startDestination = startDestination) {

        composable("Home") {
            Home()
        }

        composable("TaskList") {
            TaskList(onUpPress = actions.onUpPress)
        }

        composable("About") {
            About(onUpPress = actions.onUpPress)
        }
    }
}

internal data class Actions(val navController: NavHostController) {

    val onUpPress: () -> Unit = {
        navController.navigateUp()
    }
}