feat: add two-factor authentication support and related configurations

app/Http/Controllers/ProfileController.php

@@ -0,0 +1,40 @@
+<?php
+
+namespace App\Http\Controllers;
+
+use App\Models\User;
+use Illuminate\Http\Request;
+use Inertia\Inertia;
+use Inertia\Response;
+use Laravel\Fortify\Fortify;
+
+class ProfileController extends Controller
+{
+    /**
+     * Display the authenticated user's profile and security settings.
+     */
+    public function __invoke(Request $request): Response
+    {
+        /** @var User $user */
+        $user = $request->user();
+        $available = (bool) config('auth-ui.features.two_factor');
+        $pending = $available
+            && filled($user->two_factor_secret)
+            && ! $user->hasEnabledTwoFactorAuthentication();
+
+        return Inertia::render('Profile/Show', [
+            'twoFactor' => [
+                'available' => $available,
+                'enabled' => $available && $user->hasEnabledTwoFactorAuthentication(),
+                'pending' => $pending,
+                'requiresPassword' => $user->hasPassword(),
+                'qrCodeDataUri' => $pending
+                    ? 'data:image/svg+xml;base64,'.base64_encode($user->twoFactorQrCodeSvg())
+                    : null,
+                'secretKey' => $pending
+                    ? Fortify::currentEncrypter()->decrypt($user->two_factor_secret)
+                    : null,
+            ],
+        ]);
+    }
+}