refactor: relocate and refine passkey options configuration to application services extension

Author: aalmada

src/ApiService/BookStore.ApiService/Infrastructure/Extensions/ApplicationServicesExtensions.cs

@@ -98,15 +98,18 @@ static void AddIdentityServices(IServiceCollection services, IConfiguration conf
                 options.Password.RequireNonAlphanumeric = true;
                 options.Password.RequiredLength = 8;
 
-                // Passkey options
-                var passkeyDomain = configuration["Authentication:Passkey:ServerDomain"];
-                if (!string.IsNullOrEmpty(passkeyDomain))
-                {
-                    options.Passkey.ServerDomain = passkeyDomain;
-                }
             })
             .AddUserStore<Identity.MartenUserStore>();
 
+        // Configure Passkey options
+        _ = services.Configure<Microsoft.AspNetCore.Identity.IdentityPasskeyOptions>(options =>
+        {
+            var passkeyDomain = configuration["Authentication:Passkey:ServerDomain"];
+            options.ServerDomain = !string.IsNullOrEmpty(passkeyDomain) ? passkeyDomain : "localhost";
+            options.AuthenticatorTimeout = TimeSpan.FromMinutes(2);
+            options.ChallengeSize = 32;
+        });
+
         // Add roles support not needed via AddRoles (which requires IRoleStore), 
         // as we use simple string roles on the user object via MartenUserStore implementation of IUserRoleStore.
 

src/ApiService/BookStore.ApiService/Program.cs

@@ -47,15 +47,6 @@
     };
 });
 
-// Configure passkey options (.NET 10 WebAuthn support)
-builder.Services.Configure<Microsoft.AspNetCore.Identity.IdentityPasskeyOptions>(options =>
-{
-    var passkeyDomain = builder.Configuration["Authentication:Passkey:ServerDomain"] ?? "localhost";
-    options.ServerDomain = passkeyDomain;
-    options.AuthenticatorTimeout = TimeSpan.FromMinutes(2);
-    options.ChallengeSize = 32;
-});
-
 var app = builder.Build();
 
 // Start seeding in the background (don't block app startup)