add websocket counter plate

backend/src/index.js

@@ -329,6 +329,22 @@ app.post('/api/detect', async (req, res) => {
   }
 });
 
+// Dataset Capture Notification (from ALPR Python)
+app.post('/api/dataset/capture', (req, res) => {
+  const { plate_number, filename, count } = req.body;
+  console.log(`📸 Dataset capture: ${plate_number} (Total: ${count})`);
+
+  // Notify Frontend via WebSocket
+  io.emit('dataset_updated', {
+    plate: plate_number,
+    filename,
+    count,
+    timestamp: new Date()
+  });
+
+  res.json({ message: 'Notification sent' });
+});
+
 const bcrypt = require('bcryptjs');
 
 const PORT = process.env.PORT || 3000;