disable clearing markers for now

app.py

@@ -274,8 +274,7 @@ def main():
         lat = map_data['last_clicked']['lat']
         lng = map_data['last_clicked']['lng']
 
-        # Clear previous markers and add new one
-        marker_group.clear()
+        # Add a marker
         marker_group.add_child(folium.Marker(
             [lat, lng],
             popup=f"Selected Location\n{lat:.4f}, {lng:.4f}",