NavGraph.kt

@Composable
fun NavGraph(startDestination: String = "home") {
    val navController = rememberNavController()
    NavHost(navController = navController, startDestination = startDestination) {

        composable(route = "home") {
            Home()
        }

        composable(
            route = "task_detail/{task_id}",
            arguments = listOf(navArgument("task_id") { type = NavType.LongType }),
        ) { backStackEntry ->
            val arguments = backStackEntry.arguments
            TaskDetail(taskId = arguments?.getLong("task_id"))
        }

        composable(route = "about") {
            About()
        }
    }
}