Enhance user actions with CSRF protection and POST requests

Added CSRF protection and enforced POST requests for user delete and toggle status actions in UserController. Updated the users index view to use JavaScript for submitting POST forms with CSRF tokens for these actions, improving security and user experience. Also improved login success messages to include the user's full name.

app/Controllers/AuthController.php

@@ -167,6 +167,11 @@ class AuthController extends Controller
         $_SESSION['email'] = $user['email'];
         $_SESSION['role'] = $user['role'];
 
+        // Clear any existing session messages before successful login
+        unset($_SESSION['error']);
+        unset($_SESSION['success']);
+        unset($_SESSION['info']);
+
         // Session is automatically tracked by DatabaseSessionHandler
         // No need to manually create session record
 
@@ -178,6 +183,9 @@ class AuthController extends Controller
         // Update last login
         $this->userModel->updateLastLogin($user['id']);
 
+        // Set success message for login
+        $_SESSION['success'] = 'Login successful! Welcome back, ' . htmlspecialchars($user['full_name']) . '.';
+
         // Redirect to dashboard
         $this->redirect('/');
     }