feat: add two-factor authentication support and related configurations

app/Http/Middleware/EnsureTwoFactorAuthenticationIsEnabled.php

@@ -0,0 +1,43 @@
+<?php
+
+namespace App\Http\Middleware;
+
+use Closure;
+use Illuminate\Http\Request;
+use Symfony\Component\HttpFoundation\Response;
+
+class EnsureTwoFactorAuthenticationIsEnabled
+{
+    /**
+     * Require authenticated users to finish two-factor enrollment when configured.
+     */
+    public function handle(Request $request, Closure $next): Response
+    {
+        if (! config('auth-ui.features.two_factor')
+            || ! config('auth-ui.features.two_factor_required')
+            || ! $request->user()
+            || $request->user()->hasEnabledTwoFactorAuthentication()
+            || $this->isEnrollmentRoute($request)) {
+            return $next($request);
+        }
+
+        if ($request->expectsJson()) {
+            return response()->json([
+                'message' => 'Two-factor authentication setup is required.',
+                'setup_url' => route('profile.show'),
+            ], 403);
+        }
+
+        return redirect()->route('profile.show')
+            ->with('error', 'Two-factor authentication is required before you can continue.');
+    }
+
+    private function isEnrollmentRoute(Request $request): bool
+    {
+        return $request->routeIs([
+            'profile.*',
+            'logout',
+            'verification.*',
+        ]);
+    }
+}