Inbox Conversation Screen Lacks Back Navigation Control On iPad (iOS 26) (#8277)

* possible fix

* update of test and minor gap

Author: markdevocht

ios/TopBarPresenter.mm

@@ -160,9 +160,21 @@ - (void)setBackButtonOptions:(RNNBackButtonOptions *)backButtonOptions {
     NSNumber *fontSize = [backButtonOptions.fontSize withDefault:nil];
 
     UIViewController *previousViewControllerInStack = self.previousViewControllerInStack;
-    UIBarButtonItem *backItem = [[RNNUIBarBackButtonItem alloc] initWithOptions:backButtonOptions];
     UINavigationItem *previousNavigationItem = previousViewControllerInStack.navigationItem;
 
+    BOOL hasCustomization = icon || color || title || fontFamily || fontSize ||
+                            backButtonOptions.displayMode.hasValue ||
+                            backButtonOptions.sfSymbol.hasValue ||
+                            backButtonOptions.iconBackground.hasValue ||
+                            backButtonOptions.enableMenu.hasValue ||
+                            ![backButtonOptions.showTitle withDefault:YES];
+
+    if (!hasCustomization) {
+        return;
+    }
+
+    UIBarButtonItem *backItem = [[RNNUIBarBackButtonItem alloc] initWithOptions:backButtonOptions];
+
     if (@available(iOS 13.0, *)) {
         UIImage *sfSymbol = [UIImage systemImageNamed:[backButtonOptions.sfSymbol withDefault:nil]];
         if (backButtonOptions.sfSymbol.hasValue) {
@@ -195,7 +207,9 @@ - (void)setBackButtonOptions:(RNNBackButtonOptions *)backButtonOptions {
                    cornerRadius:cornerRadius];
     }
 
-    [self setBackIndicatorImage:icon withColor:color];
+    if (icon) {
+        [self setBackIndicatorImage:icon withColor:color];
+    }
 
     title = title ? title : (previousNavigationItem.title ? previousNavigationItem.title : @"");
 

playground/ios/NavigationTests/RNNStackPresenterTest.mm

@@ -73,9 +73,8 @@ - (void)testApplyOptions_shouldSetBackButtonOnBoundViewController_withHideTitle
 
 - (void)testApplyOptions_shouldSetBackButtonOnBoundViewController_withDefaultValues {
     [self.uut applyOptions:self.options];
-    XCTAssertTrue(
-        [self.boundViewController.viewControllers.firstObject.navigationItem.backBarButtonItem.title
-            isEqualToString:@""]);
+    XCTAssertNil(
+        self.boundViewController.viewControllers.firstObject.navigationItem.backBarButtonItem);
 }
 
 - (void)testSetBackButtonIcon_withColor_shouldSetColor {