add websocket counter plate

frontend/src/pages/AdminDashboard.jsx

@@ -33,29 +33,31 @@ function AdminDashboard({ token }) {
         fetchData();
         fetchDatasetCount();
 
-        // Actualizar contador de dataset cada 10 segundos
-        const datasetInterval = setInterval(fetchDatasetCount, 10000);
-
         // Live detection listener
         socket.on('new_detection', (data) => {
             setDetections(prev => [data, ...prev].slice(0, 10));
         });
 
+        // Real-time dataset updates
+        socket.on('dataset_updated', (data) => {
+            setDatasetCount(data.count);
+        });
+
         // Real-time updates for approvals
         socket.on('new_plate_registered', () => fetchData());
         socket.on('new_person_registered', () => fetchData());
-        socket.on('plate_status_updated', () => fetchData()); // Reused for consistency
+        socket.on('plate_status_updated', () => fetchData());
         socket.on('plate_deleted', () => fetchData());
         socket.on('person_deleted', () => fetchData());
 
         return () => {
             socket.off('new_detection');
+            socket.off('dataset_updated');
             socket.off('new_plate_registered');
             socket.off('new_person_registered');
             socket.off('plate_status_updated');
             socket.off('plate_deleted');
             socket.off('person_deleted');
-            clearInterval(datasetInterval);
         };
     }, [token]);