fix(android): prevent NullPointerException crashes during setRoot when activity is destroyed

Initialize layoutFactory early if activity is available on TurboModule init, and guard
against null activity before creating the view tree. Adds null-safe access to activity,
window, and decorView across Presenter, LayoutDirectionApplier, and RootPresenter.

Author: OneAboveAll1964

android/src/main/java/com/reactnativenavigation/react/NavigationTurboModule.kt

@@ -32,6 +32,14 @@ class NavigationTurboModule(
     private lateinit var eventEmitter: EventEmitter
 
     init {
+        activity()?.let { act ->
+            act.navigator?.let { nav ->
+                eventEmitter = EventEmitter(reactContext)
+                layoutFactory.init(act, eventEmitter, nav.childRegistry,
+                    (reactApplicationContext.applicationContext as NavigationApplication).externalComponents)
+            }
+        }
+
         reactContext.addLifecycleEventListener(object : LifecycleEventListenerAdapter() {
             override fun onHostPause() {
                 super.onHostPause()
@@ -83,12 +91,12 @@ class NavigationTurboModule(
         )
         handle {
             Log.d("NavigationTurboModule", "setRoot handle ${Thread.currentThread()}")
-            val viewController = layoutFactory.create(layoutTree)
             val activity = currentActivity
             if (activity == null) {
                 promise.reject("ACTIVITY_NULL", "Activity is null")
                 return@handle
             }
+            val viewController = layoutFactory.create(layoutTree)
             navigator()?.setRoot(
                 viewController,
                 NativeCommandListener("setRoot", commandId, promise, eventEmitter, now)

android/src/main/java/com/reactnativenavigation/viewcontrollers/viewcontroller/LayoutDirectionApplier.kt

@@ -10,7 +10,10 @@ class LayoutDirectionApplier {
         val currentContext = root.view?.context ?: return
 
         if (options.layout.direction.hasValue()) {
-            root.activity.window.decorView.layoutDirection = options.layout.direction.get()
+            val direction = options.layout.direction.get()
+            root.activity?.window?.decorView?.let { decor ->
+                decor.layoutDirection = direction
+            }
             I18nUtil.instance.allowRTL(currentContext, options.layout.direction.isRtl)
             I18nUtil.instance.forceRTL(currentContext, options.layout.direction.isRtl)
         }

android/src/main/java/com/reactnativenavigation/viewcontrollers/viewcontroller/Presenter.java

@@ -137,6 +137,7 @@ private void applyNavigationBarVisibility(NavigationBarOptions options) {
     }
 
     private void setNavigationBarBackgroundColor(NavigationBarOptions navigationBar) {
+        if (activity == null) return;
         int defaultColor = SystemUiUtils.getDefaultNavBarColor();
         if (navigationBar.backgroundColor.canApplyValue()) {
             int color = navigationBar.backgroundColor.get(defaultColor);

android/src/main/java/com/reactnativenavigation/viewcontrollers/viewcontroller/RootPresenter.java

@@ -35,11 +35,11 @@ public RootPresenter(RootAnimator animator, LayoutDirectionApplier layoutDirecti
     }
 
     public void setRoot(ViewController appearingRoot, ViewController<?> disappearingRoot, Options defaultOptions, CommandListener listener) {
-        layoutDirectionApplier.apply(appearingRoot, defaultOptions);
         if (appearingRoot.isDestroyed()) {
             listener.onError("Could not set root - appearingRoot is already destroyed");
             return;
         }
+        layoutDirectionApplier.apply(appearingRoot, defaultOptions);
         rootLayout.addView(appearingRoot.getView(), matchParentWithBehaviour(new BehaviourDelegate(appearingRoot)));
         Options options = appearingRoot.resolveCurrentOptions(defaultOptions);
         AnimationOptions enter = options.animations.setRoot.getEnter();
@@ -78,6 +78,8 @@ private void animateSetRootAndReportSuccess(ViewController root,
                     () -> {
                         if (!root.isDestroyed()) {
                             listener.onSuccess(root.getId());
+                        } else {
+                            listener.onError("Could not set root - root was destroyed before animation completed");
                         }
                         return Unit.INSTANCE;
                     });