[Net11] [iOS/MacCatalyst] Migrate TabbedPage to handler architecture

src/Controls/src/Core/Hosting/AppHostBuilderExtensions.cs

@@ -204,7 +204,7 @@ internal static IMauiHandlersCollection AddControlsHandlers(this IMauiHandlersCo
 
 #if IOS || MACCATALYST
 		handlersCollection.AddHandler(typeof(NavigationPage), typeof(Handlers.Compatibility.NavigationRenderer));
-		handlersCollection.AddHandler(typeof(TabbedPage), typeof(Handlers.Compatibility.TabbedRenderer));
+		handlersCollection.AddHandler<TabbedPage, TabbedViewHandler>();
 		handlersCollection.AddHandler(typeof(FlyoutPage), typeof(Handlers.Compatibility.PhoneFlyoutPageRenderer));
 #endif
 

src/Controls/src/Core/TabbedPage/TabbedPage.Mapper.cs

@@ -28,13 +28,14 @@ public partial class TabbedPage
 
 #endif
 
-#if WINDOWS || ANDROID || TIZEN
+#if PLATFORM
 			TabbedViewHandler.PlatformViewFactory = OnCreatePlatformView;
 #endif
 
 #if IOS
 			TabbedViewHandler.Mapper.ReplaceMapping<TabbedPage, ITabbedViewHandler>(nameof(PlatformConfiguration.iOSSpecific.Page.PrefersHomeIndicatorAutoHiddenProperty), MapPrefersHomeIndicatorAutoHiddenProperty);
 			TabbedViewHandler.Mapper.ReplaceMapping<TabbedPage, ITabbedViewHandler>(nameof(PlatformConfiguration.iOSSpecific.Page.PrefersStatusBarHiddenProperty), MapPrefersPrefersStatusBarHiddenProperty);
+			TabbedViewHandler.Mapper.ReplaceMapping<TabbedPage, ITabbedViewHandler>(PlatformConfiguration.iOSSpecific.TabbedPage.TranslucencyModeProperty.PropertyName, MapTranslucencyMode);
 #endif
 		}
 	}

src/Controls/src/Core/TabbedPage/TabbedPage.cs

@@ -28,6 +28,10 @@ public partial class TabbedPage : MultiPage<Page>, IBarElement, IElementConfigur
 
 		readonly Lazy<PlatformConfigurationRegistry<TabbedPage>> _platformConfigurationRegistry;
 
+		// Stores the collection change args from OnPagesChanged so MapItemsSource
+		// can handle Add/Remove incrementally instead of full rebuild.
+		internal NotifyCollectionChangedEventArgs _pendingPagesChangedArgs;
+
 		/// <summary>Gets or sets the background color of the tab bar. This is a bindable property.</summary>
 		public Color BarBackgroundColor
 		{
@@ -110,6 +114,7 @@ private protected override void OnHandlerChangingCore(HandlerChangingEventArgs a
 			void OnPagesChanged(object sender, System.Collections.Specialized.NotifyCollectionChangedEventArgs e)
 			{
 				WireUnwireChanges(false);
+				_pendingPagesChangedArgs = e;
 				Handler?.UpdateValue(TabbedPage.ItemsSourceProperty.PropertyName);
 				WireUnwireChanges(true);
 			}
@@ -127,7 +132,8 @@ void WireUnwireChanges(bool wire)
 
 			void OnPagePropertyChanged(object sender, System.ComponentModel.PropertyChangedEventArgs e)
 			{
-				if (e.PropertyName == Page.TitleProperty.PropertyName)
+				if (e.PropertyName == Page.TitleProperty.PropertyName ||
+					e.PropertyName == Page.IconImageSourceProperty.PropertyName)
 					Handler?.UpdateValue(TabbedPage.ItemsSourceProperty.PropertyName);
 			}
 		}