Remove BaseCallback, it's actually not ideal when looking for usage.

features/preferences/impl/src/main/kotlin/io/element/android/features/preferences/impl/PreferencesFlowNode.kt

@@ -40,7 +40,6 @@ import io.element.android.libraries.architecture.BaseFlowNode
 import io.element.android.libraries.architecture.appyx.canPop
 import io.element.android.libraries.architecture.callback
 import io.element.android.libraries.architecture.createNode
-import io.element.android.libraries.architecture.navigation.BaseCallback
 import io.element.android.libraries.di.SessionScope
 import io.element.android.libraries.matrix.api.core.EventId
 import io.element.android.libraries.matrix.api.core.RoomId
@@ -268,7 +267,11 @@ class PreferencesFlowNode(
             }
             is NavTarget.UserProfile -> {
                 val inputs = EditUserProfileNode.Inputs(navTarget.matrixUser)
-                val callback = BaseCallback { backstack.pop() }
+                val callback = object : EditUserProfileNode.Callback {
+                    override fun onDone() {
+                        backstack.pop()
+                    }
+                }
                 createNode<EditUserProfileNode>(buildContext, listOf(inputs, callback))
             }
             NavTarget.LockScreenSettings -> {

features/preferences/impl/src/main/kotlin/io/element/android/features/preferences/impl/user/editprofile/EditUserProfileNode.kt

@@ -19,7 +19,6 @@ import io.element.android.annotations.ContributesNode
 import io.element.android.libraries.architecture.NodeInputs
 import io.element.android.libraries.architecture.callback
 import io.element.android.libraries.architecture.inputs
-import io.element.android.libraries.architecture.navigation.BaseCallback
 import io.element.android.libraries.architecture.navigation.BaseNavigator
 import io.element.android.libraries.di.SessionScope
 import io.element.android.libraries.matrix.api.user.MatrixUser
@@ -36,8 +35,12 @@ class EditUserProfileNode(
         val matrixUser: MatrixUser
     ) : NodeInputs
 
+    interface Callback : Plugin {
+        fun onDone()
+    }
+
     val matrixUser = inputs<Inputs>().matrixUser
-    val callback: BaseCallback = callback()
+    val callback: Callback = callback()
     val presenter = presenterFactory.create(
         matrixUser = matrixUser,
         navigator = this,

libraries/architecture/src/main/kotlin/io/element/android/libraries/architecture/navigation/BaseCallback.kt

@@ -1,17 +0,0 @@
-/*
- * Copyright (c) 2025 Element Creations Ltd.
- *
- * SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial.
- * Please see LICENSE files in the repository root for full details.
- */
-
-package io.element.android.libraries.architecture.navigation
-
-import com.bumble.appyx.core.plugin.Plugin
-
-/**
- * Base callback interface to be implemented by callers to handle results from nodes.
- */
-fun interface BaseCallback : Plugin {
-    fun onDone()
-}