chore: import upstream snapshot with attribution

dotnet/samples/05-end-to-end/AGUIWebChat/Client/Program.cs

@@ -0,0 +1,34 @@
+// Copyright (c) Microsoft. All rights reserved.
+
+using AGUI.Client;
+using AGUIWebChatClient.Components;
+
+WebApplicationBuilder builder = WebApplication.CreateBuilder(args);
+
+// Add services to the container.
+builder.Services.AddRazorComponents()
+    .AddInteractiveServerComponents();
+
+string serverUrl = builder.Configuration["AGUI_SERVER_URL"] ?? "http://localhost:5100";
+
+builder.Services.AddHttpClient("aguiserver", httpClient => httpClient.BaseAddress = new Uri(serverUrl));
+
+builder.Services.AddChatClient(sp => new AGUIChatClient(new(
+    sp.GetRequiredService<IHttpClientFactory>().CreateClient("aguiserver"), "ag-ui")));
+
+WebApplication app = builder.Build();
+
+// Configure the HTTP request pipeline.
+if (!app.Environment.IsDevelopment())
+{
+    app.UseExceptionHandler("/Error", createScopeForErrors: true);
+    app.UseHsts();
+}
+
+app.UseHttpsRedirection();
+app.UseAntiforgery();
+app.MapStaticAssets();
+app.MapRazorComponents<App>()
+    .AddInteractiveServerRenderMode();
+
+app.Run();