Add missing Parcelable to InsideTheBackStack.NavTarget and IndexedBackStack.State

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: LissF

samples/app/src/main/kotlin/com/bumble/appyx/app/node/backstack/InsideTheBackStack.kt

@@ -16,6 +16,7 @@ import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.unit.dp
 import androidx.lifecycle.coroutineScope
+import android.os.Parcelable
 import com.bumble.appyx.app.node.backstack.InsideTheBackStack.NavTarget
 import com.bumble.appyx.app.node.backstack.app.ChildNode
 import com.bumble.appyx.app.node.backstack.app.composable.CustomButton
@@ -30,6 +31,7 @@ import com.bumble.appyx.core.node.Node
 import com.bumble.appyx.core.node.ParentNode
 import kotlinx.coroutines.delay
 import kotlinx.coroutines.isActive
+import kotlinx.parcelize.Parcelize
 
 class InsideTheBackStack(
     buildContext: BuildContext,
@@ -61,7 +63,8 @@ class InsideTheBackStack(
         }
     }
 
-    sealed class NavTarget {
+    sealed class NavTarget : Parcelable {
+        @Parcelize
         data class Child(val index: Int) : NavTarget() {
             override fun toString(): String = index.toString()
         }

samples/app/src/main/kotlin/com/bumble/appyx/app/node/backstack/app/indexedbackstack/IndexedBackStack.kt

@@ -1,10 +1,12 @@
 package com.bumble.appyx.app.node.backstack.app.indexedbackstack
 
+import android.os.Parcelable
 import com.bumble.appyx.core.navigation.BaseNavModel
 import com.bumble.appyx.core.navigation.NavElements
 import com.bumble.appyx.core.navigation.NavKey
 import com.bumble.appyx.core.navigation.Operation
 import com.bumble.appyx.core.state.SavedStateMap
+import kotlinx.parcelize.Parcelize
 
 class IndexedBackStack<NavTarget : Any>(
     savedState: SavedStateMap?,
@@ -15,14 +17,20 @@ class IndexedBackStack<NavTarget : Any>(
     savedStateMap = savedState
 ) {
 
-    sealed interface State {
+    sealed interface State : Parcelable {
+        @Parcelize
         object Created : State
+
+        @Parcelize
         object Active : State
-        class Stashed(
+
+        @Parcelize
+        data class Stashed(
             val index: Int,
             val size: Int
         ) : State
 
+        @Parcelize
         object Destroyed : State
     }