Add CSRF, CAPTCHA, and input validation improvements

Introduces CSRF protection to all sensitive controller actions, integrates configurable CAPTCHA (reCAPTCHA v2/v3, Turnstile) for authentication and registration flows, and centralizes input validation via a new InputValidator helper. Adds new helpers and services for CSRF and CAPTCHA, updates settings and migration for CAPTCHA configuration, and enhances logging and error handling in TLD registry import processes. Also improves validation for user, domain, group, and profile inputs throughout the application.

app/Controllers/ProfileController.php

@@ -80,6 +80,9 @@ class ProfileController extends Controller
             return;
         }
 
+        // CSRF Protection
+        $this->verifyCsrf('/profile');
+
         $userId = Auth::id();
         $fullName = trim($_POST['full_name'] ?? '');
         $email = trim($_POST['email'] ?? '');
@@ -91,6 +94,14 @@ class ProfileController extends Controller
             return;
         }
 
+        // Validate full name length
+        $nameError = \App\Helpers\InputValidator::validateLength($fullName, 255, 'Full name');
+        if ($nameError) {
+            $_SESSION['error'] = $nameError;
+            $this->redirect('/profile');
+            return;
+        }
+
         if (!filter_var($email, FILTER_VALIDATE_EMAIL)) {
             $_SESSION['error'] = 'Please enter a valid email address';
             $this->redirect('/profile');
@@ -131,6 +142,9 @@ class ProfileController extends Controller
             return;
         }
 
+        // CSRF Protection
+        $this->verifyCsrf('/profile');
+
         $userId = Auth::id();
         $currentPassword = $_POST['current_password'] ?? '';
         $newPassword = $_POST['new_password'] ?? '';
@@ -226,6 +240,14 @@ class ProfileController extends Controller
      */
     public function logoutOtherSessions()
     {
+        if ($_SERVER['REQUEST_METHOD'] !== 'POST') {
+            $this->redirect('/profile');
+            return;
+        }
+
+        // CSRF Protection
+        $this->verifyCsrf('/profile');
+
         $userId = Auth::id();
         $currentSessionId = session_id();
 
@@ -273,6 +295,9 @@ class ProfileController extends Controller
             return;
         }
 
+        // CSRF Protection
+        $this->verifyCsrf('/profile');
+
         $sessionId = $params['sessionId'] ?? '';
         $userId = Auth::id();
         $currentSessionId = session_id();