Fix: Prevent exceptions when available size is zero or negative

Author: seer-by-sentry[bot]

src/Files.App.Controls/BreadcrumbBar/BreadcrumbBarLayout.cs

@@ -33,14 +33,21 @@ protected override Size MeasureOverride(NonVirtualizingLayoutContext context, Si
 			var accumulatedSize = new Size(0, 0);
 			_availableSize = availableSize;
 
+			// Ensure we have a minimum size to prevent DivideByZeroException in WinUI
+			// When availableSize has zero dimensions, provide a minimal positive size for measurement
+			var measureSize = new Size(
+				Math.Max(availableSize.Width, 1.0),
+				Math.Max(availableSize.Height, 1.0)
+			);
+
 			var indexAfterEllipsis = GetFirstIndexToRender(context);
 
 			// Go through all items and measure them
 			for (int index = 0; index < context.Children.Count; index++)
 			{
 				if (context.Children[index] is BreadcrumbBarItem breadcrumbItem)
 				{
-					breadcrumbItem.Measure(availableSize);
+					breadcrumbItem.Measure(measureSize);
 					accumulatedSize.Width += index < indexAfterEllipsis ? 0 : breadcrumbItem.DesiredSize.Width;
 					accumulatedSize.Height = Math.Max(accumulatedSize.Height, breadcrumbItem.DesiredSize.Height);
 				}
@@ -98,6 +105,10 @@ private int GetFirstIndexToRender(NonVirtualizingLayoutContext context)
 			var itemCount = context.Children.Count;
 			var accumulatedWidth = 0d;
 
+			// Handle zero or negative available width - hide all items
+			if (_availableSize.Width <= 0)
+				return itemCount;
+
 			// Go through all items from the last item
 			for (int index = itemCount - 1; index >= 0; index--)
 			{