Some clean up on room details

features/roomdetails/impl/src/main/kotlin/io/element/android/features/roomdetails/impl/RoomDetailsFlowNode.kt

@@ -56,19 +56,16 @@ class RoomDetailsFlowNode @AssistedInject constructor(
         object RoomMemberList : NavTarget
     }
 
-    interface Callback : Plugin {
-        fun openRoomMemberList()
-    }
-
-    val callback = object : Callback {
-        override fun openRoomMemberList() {
-            backstack.push(NavTarget.RoomMemberList)
-        }
-    }
-
     override fun resolve(navTarget: NavTarget, buildContext: BuildContext): Node {
         return when (navTarget) {
-            NavTarget.RoomDetails -> createNode<RoomDetailsNode>(buildContext, listOf(callback))
+            NavTarget.RoomDetails -> {
+                val callback = object : RoomDetailsNode.Callback {
+                    override fun openRoomMemberList() {
+                        backstack.push(NavTarget.RoomMemberList)
+                    }
+                }
+                createNode<RoomDetailsNode>(buildContext, listOf(callback))
+            }
             NavTarget.RoomMemberList -> createNode<RoomMemberListNode>(buildContext)
         }
     }

features/roomdetails/impl/src/main/kotlin/io/element/android/features/roomdetails/impl/RoomDetailsNode.kt

@@ -41,7 +41,11 @@ class RoomDetailsNode @AssistedInject constructor(
     private val room: MatrixRoom,
 ) : Node(buildContext, plugins = plugins) {
 
-    private val callback = plugins<RoomDetailsFlowNode.Callback>().firstOrNull()
+    interface Callback : Plugin {
+        fun openRoomMemberList()
+    }
+
+    private val callback = plugins<Callback>().firstOrNull()
 
     private fun openRoomMemberList() {
         callback?.openRoomMemberList()