[Blazor] Register persistent component state services in AddBlazorWebView (#62384)

* Adds persistent component state service registrations to AddBlazorWebView to ensure that components that use PersistentComponentState can render in WebView scenarios.

Author: Copilot

src/Components/WebView/WebView/src/ComponentsWebViewServiceCollectionExtensions.cs

@@ -2,6 +2,7 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 
 using Microsoft.AspNetCore.Components;
+using Microsoft.AspNetCore.Components.Infrastructure;
 using Microsoft.AspNetCore.Components.Routing;
 using Microsoft.AspNetCore.Components.Web;
 using Microsoft.AspNetCore.Components.WebView.Services;
@@ -28,6 +29,8 @@ public static IServiceCollection AddBlazorWebView(this IServiceCollection servic
         services.TryAddScoped<IScrollToLocationHash, WebViewScrollToLocationHash>();
         services.TryAddScoped<NavigationManager, WebViewNavigationManager>();
         services.TryAddScoped<IErrorBoundaryLogger, WebViewErrorBoundaryLogger>();
+        services.TryAddScoped<ComponentStatePersistenceManager>();
+        services.TryAddScoped<PersistentComponentState>(sp => sp.GetRequiredService<ComponentStatePersistenceManager>().State);
         services.AddSupplyValueFromQueryProvider();
 
         return services;

src/Components/WebView/WebView/test/ComponentsWebViewServiceCollectionExtensionsTests.cs

@@ -0,0 +1,49 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+
+using Microsoft.AspNetCore.Components;
+using Microsoft.AspNetCore.Components.Infrastructure;
+using Microsoft.Extensions.DependencyInjection;
+
+namespace Microsoft.AspNetCore.Components.WebView;
+
+public class ComponentsWebViewServiceCollectionExtensionsTests
+{
+    [Fact]
+    public void AddBlazorWebView_RegistersPersistentComponentStateServices()
+    {
+        // Arrange
+        var services = new ServiceCollection();
+
+        // Act
+        services.AddBlazorWebView();
+        var serviceProvider = services.BuildServiceProvider();
+
+        // Assert
+        var persistenceManager = serviceProvider.GetService<ComponentStatePersistenceManager>();
+        var persistentState = serviceProvider.GetService<PersistentComponentState>();
+
+        Assert.NotNull(persistenceManager);
+        Assert.NotNull(persistentState);
+        Assert.Same(persistenceManager.State, persistentState);
+    }
+
+    [Fact]
+    public void AddBlazorWebView_RegistersServicesAsScoped()
+    {
+        // Arrange
+        var services = new ServiceCollection();
+
+        // Act
+        services.AddBlazorWebView();
+
+        // Assert
+        var persistenceManagerDescriptor = services.FirstOrDefault(s => s.ServiceType == typeof(ComponentStatePersistenceManager));
+        var persistentStateDescriptor = services.FirstOrDefault(s => s.ServiceType == typeof(PersistentComponentState));
+
+        Assert.NotNull(persistenceManagerDescriptor);
+        Assert.NotNull(persistentStateDescriptor);
+        Assert.Equal(ServiceLifetime.Scoped, persistenceManagerDescriptor.Lifetime);
+        Assert.Equal(ServiceLifetime.Scoped, persistentStateDescriptor.Lifetime);
+    }
+}