Initial commit

app/src/main/java/com/example/cakeapp/navigation/CakeNavGraph.kt

@@ -0,0 +1,48 @@
+package com.example.cakeapp.navigation
+
+import androidx.compose.runtime.Composable
+import androidx.navigation.NavHostController
+import androidx.navigation.NavType
+import androidx.navigation.compose.NavHost
+import androidx.navigation.compose.composable
+import androidx.navigation.navArgument
+import com.example.cakeapp.screens.MenuScreen
+import com.example.cakeapp.screens.OrderScreen
+
+object Routes {
+    const val MENU = "menu"
+    const val ORDER = "order/{cakeId}"
+    
+    fun orderRoute(cakeId: Int) = "order/$cakeId"
+}
+
+@Composable
+fun CakeNavGraph(navController: NavHostController) {
+    NavHost(
+        navController = navController,
+        startDestination = Routes.MENU
+    ) {
+        composable(Routes.MENU) {
+            MenuScreen(
+                onCakeSelected = { cakeId ->
+                    navController.navigate(Routes.orderRoute(cakeId))
+                }
+            )
+        }
+        
+        composable(
+            route = Routes.ORDER,
+            arguments = listOf(
+                navArgument("cakeId") { type = NavType.IntType }
+            )
+        ) { backStackEntry ->
+            val cakeId = backStackEntry.arguments?.getInt("cakeId") ?: 1
+            OrderScreen(
+                cakeId = cakeId,
+                onBackToMenu = {
+                    navController.popBackStack()
+                }
+            )
+        }
+    }
+}