Add user registration page with default operator role

src/Controllers/AuthController.php

@@ -80,6 +80,65 @@ class AuthController
         $this->view->redirect($intended);
     }
 
+    public function registerForm(): void
+    {
+        if (Session::has('user_id')) {
+            $this->view->redirect('/dashboard');
+        }
+
+        $this->view->setLayout('auth');
+        $this->view->display('auth.register', [
+            'title' => 'Register - ServerManager',
+        ]);
+    }
+
+    public function register(): void
+    {
+        $validator = new Validator();
+        $rules = [
+            'username' => 'required|min:3|max:50',
+            'email' => 'required|email',
+            'password' => 'required|min:8',
+            'confirm_password' => 'required|match:password',
+        ];
+
+        if (!$validator->validate($_POST, $rules)) {
+            Session::setFlash('error', $validator->getFirstError());
+            $this->view->redirect('/register');
+        }
+
+        $username = $_POST['username'];
+        $email = $_POST['email'];
+
+        $existing = $this->userModel->findByUsername($username);
+        if ($existing) {
+            Session::setFlash('error', 'Username already exists.');
+            $this->view->redirect('/register');
+        }
+
+        $existingEmail = $this->userModel->findByEmail($email);
+        if ($existingEmail) {
+            Session::setFlash('error', 'Email already registered.');
+            $this->view->redirect('/register');
+        }
+
+        $id = $this->userModel->create([
+            'username' => $username,
+            'email' => $email,
+            'password' => $_POST['password'],
+            'role' => 'operator',
+            'is_active' => 1,
+        ]);
+
+        $this->auditService->log('user_registered', 'user', $id, [
+            'username' => $username,
+            'role' => 'operator',
+        ]);
+
+        Session::setFlash('success', 'Account created. You can now log in.');
+        $this->view->redirect('/login');
+    }
+
     public function logout(): void
     {
         $this->auditService->log(