[iOS 26] Fix NavigationPage.TitleView not resizing on device rotation

.github/agents/issue-resolver.md

@@ -37,7 +37,7 @@ You are a specialized issue resolution agent for the .NET MAUI repository. Your
 - **iOS**: `xcrun simctl spawn booted log stream --predicate 'processImagePath contains "[AppName]"' --level=debug`
 - **Android**: `adb logcat | grep -E "(FATAL|AndroidRuntime|Exception)"`
 
-See `.github/instructions/common-testing-patterns.md` section "Error: App Crashes on Launch" for complete patterns.
+See [common-testing-patterns.md](../instructions/common-testing-patterns.md) section "Error: App Crashes on Launch" for complete patterns.
 
 ## ⚡ GETTING STARTED (Progressive Disclosure)
 

.github/agents/pr-reviewer.md

@@ -12,7 +12,7 @@ You are a specialized PR review agent for the .NET MAUI repository.
 **BEFORE creating any plans or todos:**
 
 1. ✅ Check current state: `git branch --show-current`
-2. ✅ Read [quick-start.md](.github/instructions/pr-reviewer-agent/quick-start.md) (5 min) - **STOP after "Essential Reading" section**
+2. ✅ Read [quick-start.md](../instructions/pr-reviewer-agent/quick-start.md) (5 min) - **STOP after "Essential Reading" section**
 3. ✅ Fetch and analyze PR details
 
 **ONLY AFTER completing these steps may you:**
@@ -31,7 +31,7 @@ You are a specialized PR review agent for the .NET MAUI repository.
 
 **Phase 1: Mandatory Pre-Work (Do NOT skip)**
 1. ✅ Check current branch: `git branch --show-current`
-2. ✅ Read quick-start.md (5 min) - **STOP after "Essential Reading" section**
+2. ✅ Read [quick-start.md](../instructions/pr-reviewer-agent/quick-start.md) (5 min) - **STOP after "Essential Reading" section**
 3. ✅ Fetch PR and analyze code changes
 
 **Phase 2: Create Initial Plan**
@@ -50,30 +50,30 @@ You are a specialized PR review agent for the .NET MAUI repository.
 
 **Step 1: Quick Start (5 minutes - READ THIS FIRST)**
 
-Read **[quick-start.md](.github/instructions/pr-reviewer-agent/quick-start.md)** which covers:
+Read **[quick-start.md](../instructions/pr-reviewer-agent/quick-start.md)** which covers:
 - ✅ Which app to use (Sandbox vs HostApp)
 - ✅ Basic workflow with mandatory checkpoints
 - ✅ Where to find detailed instructions
 - ✅ Common mistakes to avoid
 
 **Step 2: Context-Specific (Read as needed during work)**
 
-- **CollectionView/CarouselView PR?** → Read [collectionview-handler-detection.md](.github/instructions/pr-reviewer-agent/collectionview-handler-detection.md)
-- **SafeArea changes?** → Read [safearea-testing.instructions.md](.github/instructions/safearea-testing.instructions.md)
-- **UI test files in PR?** → Read [uitests.instructions.md](.github/instructions/uitests.instructions.md)
-- **Need test code examples?** → See [sandbox-setup.md](.github/instructions/pr-reviewer-agent/sandbox-setup.md)
-- **Build/deploy commands?** → Use [quick-ref.md](.github/instructions/pr-reviewer-agent/quick-ref.md)
-- **Hit an error?** → Check [error-handling.md](.github/instructions/pr-reviewer-agent/error-handling.md)
-- **Can't complete testing?** → Use [checkpoint-resume.md](.github/instructions/pr-reviewer-agent/checkpoint-resume.md)
+- **CollectionView/CarouselView PR?** → Read [collectionview-handler-detection.md](../instructions/pr-reviewer-agent/collectionview-handler-detection.md)
+- **SafeArea changes?** → Read [safearea-testing.instructions.md](../instructions/safearea-testing.instructions.md)
+- **UI test files in PR?** → Read [uitests.instructions.md](../instructions/uitests.instructions.md)
+- **Need test code examples?** → See [sandbox-setup.md](../instructions/pr-reviewer-agent/sandbox-setup.md)
+- **Build/deploy commands?** → Use [quick-ref.md](../instructions/pr-reviewer-agent/quick-ref.md)
+- **Hit an error?** → Check [error-handling.md](../instructions/pr-reviewer-agent/error-handling.md)
+- **Can't complete testing?** → Use [checkpoint-resume.md](../instructions/pr-reviewer-agent/checkpoint-resume.md)
 
 **Step 3: Before Final Review (Always)**
 
-- **Writing review?** → Read [output-format.md](.github/instructions/pr-reviewer-agent/output-format.md) to eliminate redundancy
+- **Writing review?** → Read [output-format.md](../instructions/pr-reviewer-agent/output-format.md) to eliminate redundancy
 
 **Step 4: Deep Understanding (Optional - for complex PRs)**
 
-- **Why test deeply?** → [core-guidelines.md](.github/instructions/pr-reviewer-agent/core-guidelines.md)
-- **Complete workflow details?** → [testing-guidelines.md](.github/instructions/pr-reviewer-agent/testing-guidelines.md)
+- **Why test deeply?** → [core-guidelines.md](../instructions/pr-reviewer-agent/core-guidelines.md)
+- **Complete workflow details?** → [testing-guidelines.md](../instructions/pr-reviewer-agent/testing-guidelines.md)
 
 ## Quick Reference
 
@@ -85,6 +85,6 @@ Read **[quick-start.md](.github/instructions/pr-reviewer-agent/quick-start.md)**
 
 **Workflow**: Fetch PR → Modify Sandbox → Build/Deploy → Test → Compare WITH/WITHOUT PR → Test edge cases → Review
 
-**Checkpoint/Resume**: If you cannot complete testing due to environment limitations (missing device, platform unavailable), use the checkpoint system in `checkpoint-resume.md`.
+**Checkpoint/Resume**: If you cannot complete testing due to environment limitations (missing device, platform unavailable), use the checkpoint system in [checkpoint-resume.md](../instructions/pr-reviewer-agent/checkpoint-resume.md).
 
 **See instruction files above for complete details.**

src/Controls/samples/Controls.Sample.Sandbox/MainPage.xaml

@@ -1,5 +1,45 @@
 <ContentPage xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
              xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
              x:Class="Maui.Controls.Sample.MainPage"
-             xmlns:local="clr-namespace:Maui.Controls.Sample">
+             xmlns:local="clr-namespace:Maui.Controls.Sample"
+             Title="TitleView Rotation Test">
+
+    <NavigationPage.TitleView>
+        <!-- Red background makes it easy to see if TitleView doesn't fill the navigation bar -->
+        <Grid x:Name="TitleViewGrid" 
+              BackgroundColor="Red" 
+              HorizontalOptions="FillAndExpand">
+            <Label Text="TitleView Test" 
+                   x:Name="TitleLabel"
+                   TextColor="White"
+                   FontSize="18"
+                   FontAttributes="Bold"
+                   VerticalOptions="Center"
+                   HorizontalOptions="Center"/>
+        </Grid>
+    </NavigationPage.TitleView>
+
+    <VerticalStackLayout Padding="20" Spacing="10">
+        <Label Text="NavigationPage.TitleView Rotation Test"
+               FontSize="20"
+               FontAttributes="Bold"
+               HorizontalOptions="Center"/>
+
+        <Label Text="Testing Issue #32722: TitleView should expand to fill navigation bar after rotation on iOS 26+"
+               FontSize="14"
+               HorizontalOptions="Center"/>
+
+        <Label x:Name="StatusLabel"
+               Text="Rotate device to test..."
+               FontSize="16"
+               TextColor="Gray"
+               Margin="0,20,0,0"
+               HorizontalOptions="Center"/>
+
+        <Label x:Name="MeasurementsLabel"
+               Text=""
+               FontSize="14"
+               TextColor="Blue"
+               Margin="0,10,0,0"/>
+    </VerticalStackLayout>
 </ContentPage>

src/Controls/samples/Controls.Sample.Sandbox/MainPage.xaml.cs

@@ -1,9 +1,97 @@
-namespace Maui.Controls.Sample;
+using System;
+
+namespace Maui.Controls.Sample;
 
 public partial class MainPage : ContentPage
 {
 	public MainPage()
 	{
 		InitializeComponent();
+
+		// Hook into the Loaded event to measure after layout is complete
+		Loaded += OnLoaded;
+
+		// Also monitor size changes to track rotation
+		SizeChanged += OnSizeChanged;
+	}
+
+	private void OnLoaded(object sender, EventArgs e)
+	{
+		// Wait for layout to complete
+		Dispatcher.DispatchDelayed(TimeSpan.FromMilliseconds(500), () =>
+		{
+			LogMeasurements("OnLoaded (Initial)");
+		});
+	}
+
+	private void OnSizeChanged(object sender, EventArgs e)
+	{
+		// Wait for layout to complete after size change
+		Dispatcher.DispatchDelayed(TimeSpan.FromMilliseconds(500), () =>
+		{
+			LogMeasurements($"OnSizeChanged (Page: {Width:F0}x{Height:F0})");
+		});
+	}
+
+	private void LogMeasurements(string context)
+	{
+		Console.WriteLine($"\n========== {context} ==========");
+
+		// Get TitleView measurements
+		var titleViewWidth = TitleViewGrid.Width;
+		var titleViewHeight = TitleViewGrid.Height;
+		var titleViewBounds = TitleViewGrid.Bounds;
+
+		Console.WriteLine($"TitleView Width: {titleViewWidth:F2}");
+		Console.WriteLine($"TitleView Height: {titleViewHeight:F2}");
+		Console.WriteLine($"TitleView Bounds: {titleViewBounds}");
+
+		// Get screen dimensions for reference
+		var screenWidth = DeviceDisplay.MainDisplayInfo.Width / DeviceDisplay.MainDisplayInfo.Density;
+		var screenHeight = DeviceDisplay.MainDisplayInfo.Height / DeviceDisplay.MainDisplayInfo.Density;
+		Console.WriteLine($"Screen Size: {screenWidth:F2}x{screenHeight:F2}");
+
+		// Get page dimensions
+		Console.WriteLine($"Page Size: {Width:F2}x{Height:F2}");
+
+#if IOS || MACCATALYST
+		// Get platform-specific navigation bar width for comparison
+		if (TitleViewGrid.Handler?.PlatformView is UIKit.UIView platformView)
+		{
+			var navController = platformView;
+			while (navController != null && navController is not UIKit.UINavigationController)
+			{
+				navController = navController.Superview;
+			}
+
+			if (navController is UIKit.UINavigationController uiNavController)
+			{
+				var navBarWidth = uiNavController.NavigationBar.Frame.Width;
+				var navBarHeight = uiNavController.NavigationBar.Frame.Height;
+				Console.WriteLine($"Navigation Bar Size: {navBarWidth:F2}x{navBarHeight:F2}");
+
+				var widthDiff = navBarWidth - titleViewWidth;
+				Console.WriteLine($"Width Difference (NavBar - TitleView): {widthDiff:F2}");
+
+				if (Math.Abs(widthDiff) > 10)
+				{
+					Console.WriteLine($"⚠️  WARNING: TitleView width ({titleViewWidth:F2}) does NOT match NavBar width ({navBarWidth:F2})");
+					Console.WriteLine($"    This indicates the bug is present!");
+				}
+				else
+				{
+					Console.WriteLine($"✅ TitleView width matches NavBar width");
+				}
+			}
+		}
+#endif
+
+		Console.WriteLine("=================================\n");
+
+		// Update UI label
+		Dispatcher.Dispatch(() =>
+		{
+			MeasurementsLabel.Text = $"Last measurement: {context}\nTitleView: {titleViewWidth:F0}x{titleViewHeight:F0}";
+		});
 	}
 }