Fix SKLottieView animation not starting in CarouselView

source/SkiaSharp.Extended.UI.Maui/Controls/SKAnimatedSurfaceView.shared.cs

@@ -17,6 +17,20 @@ public SKAnimatedSurfaceView()
 		Loaded += OnLoaded;
 	}
 
+	protected override void OnPropertyChanged(string? propertyName = null)
+	{
+		base.OnPropertyChanged(propertyName);
+
+		if (propertyName == nameof(Window))
+		{
+			// Restart animation when Window becomes available
+			// This handles scenarios like CarouselView where views may be created
+			// before Window is assigned, or Window becomes null and then reassigned
+			if (Window is not null)
+				UpdateIsAnimationEnabled();
+		}
+	}
+
 	/// <summary>
 	/// Gets or sets a value indicating whether this control will play the animation provided.
 	/// </summary>

tests/SkiaSharp.Extended.UI.Maui.Tests/Controls/SKAnimatedSurfaceViewTest.cs

@@ -37,4 +37,57 @@ static WeakReference Setup(bool animate)
 			return new WeakReference(view);
 		}
 	}
+
+	[Fact]
+	public async Task AnimationStartsWhenWindowBecomesAvailable()
+	{
+		// This test verifies the fix for the CarouselView issue where the first
+		// animation doesn't show because Window is null during initial rendering
+		var view = new TestAnimatedSurfaceView();
+		var page = new ContentPage { Content = view };
+
+		// Enable animation before Window is assigned
+		view.IsAnimationEnabled = true;
+
+		// Initially, no updates should occur because Window is null
+		await Task.Delay(50);
+		Assert.Equal(0, view.UpdateCount);
+
+		// Assign the Window - this should trigger animation to start
+		var window = new Window { Page = page };
+
+		// Poll for animation to start with timeout
+		var started = await PollForConditionAsync(
+			() => view.UpdateCount > 0,
+			timeout: TimeSpan.FromSeconds(1));
+
+		// Now updates should be occurring
+		Assert.True(started, "Animation should start after Window is assigned");
+	}
+
+	private static async Task<bool> PollForConditionAsync(Func<bool> condition, TimeSpan timeout)
+	{
+		var endTime = DateTime.UtcNow + timeout;
+		while (DateTime.UtcNow < endTime)
+		{
+			if (condition())
+				return true;
+			await Task.Delay(10);
+		}
+		return false;
+	}
+
+	private class TestAnimatedSurfaceView : SKAnimatedSurfaceView
+	{
+		public int UpdateCount { get; private set; }
+
+		protected override void Update(TimeSpan deltaTime)
+		{
+			base.Update(deltaTime);
+			// Only count actual animation updates (deltaTime > 0)
+			// Zero delta time occurs when animation is disabled
+			if (deltaTime > TimeSpan.Zero)
+				UpdateCount++;
+		}
+	}
 }