Added list of detectors and sensors sub-menus

frontend/components/navigation/Monitoring.tsx

@@ -8,7 +8,6 @@ interface MonitoringProps {
 }
 
 const Monitoring: React.FC<MonitoringProps> = ({ onClose, onSelectModel }) => {
-  const [objectImageError, setObjectImageError] = useState(false);
   const [models, setModels] = useState<{ title: string; path: string }[]>([]);
   const [loadError, setLoadError] = useState<string | null>(null);