feat(auth): harden authentication and add configurable two-factor support

tests/Feature/Auth/LoginTest.php

@@ -5,6 +5,10 @@ use Illuminate\Foundation\Testing\RefreshDatabase;
 
 uses(RefreshDatabase::class);
 
+beforeEach(function () {
+    config(['auth-ui.features.two_factor_required' => false]);
+});
+
 it('allows login with email and password', function () {
     $user = User::factory()->create([
         'email' => 'test@example.com',