sync active training with UI if running

ANNOTATE/web/app.py

@@ -1241,6 +1241,48 @@ class AnnotationDashboard:
                     }
                 })
         
+        @self.server.route('/api/active-training', methods=['GET'])
+        def get_active_training():
+            """
+            Get currently active training session (if any)
+            Allows UI to resume tracking after page reload or across multiple clients
+            """
+            try:
+                if not self.training_adapter:
+                    return jsonify({
+                        'success': False,
+                        'active': False,
+                        'error': {
+                            'code': 'TRAINING_UNAVAILABLE',
+                            'message': 'Real training adapter not available'
+                        }
+                    })
+                
+                active_session = self.training_adapter.get_active_training_session()
+                
+                if active_session:
+                    return jsonify({
+                        'success': True,
+                        'active': True,
+                        'session': active_session
+                    })
+                else:
+                    return jsonify({
+                        'success': True,
+                        'active': False
+                    })
+                
+            except Exception as e:
+                logger.error(f"Error getting active training: {e}")
+                return jsonify({
+                    'success': False,
+                    'active': False,
+                    'error': {
+                        'code': 'ACTIVE_TRAINING_ERROR',
+                        'message': str(e)
+                    }
+                })
+        
         # Live Training API Endpoints
         @self.server.route('/api/live-training/start', methods=['POST'])
         def start_live_training():