feat: Implement Two-Factor Authentication (2FA) for enhanced user account security.

server/middleware/auth.js

@@ -35,7 +35,7 @@ export async function authenticateToken(req, res, next) {
     }
 
     const db = getDb();
-    const user = await db.get('SELECT id, name, display_name, email, role, theme, language, avatar_color, avatar_image, email_verified, oauth_provider FROM users WHERE id = ?', [decoded.userId]);
+    const user = await db.get('SELECT id, name, display_name, email, role, theme, language, avatar_color, avatar_image, email_verified, oauth_provider, totp_enabled FROM users WHERE id = ?', [decoded.userId]);
     if (!user) {
       return res.status(401).json({ error: 'User not found' });
     }