Update app.py

app.py

@@ -573,14 +573,16 @@ def render_sidebar():
             horizontal=True # Make radio horizontal if preferred
         )
 
-        # Handle tool change
+# Handle tool change
         if selected_tool != current_tool_name:
             st.session_state.selected_object = selected_tool
             add_action_log(f"Selected tool: {selected_tool}")
-            # Update JS via sync call
-            sync(js_code=f"updateSelectedObjectType({json.dumps(selected_tool)});", key=f"update_tool_js_{selected_tool}")
-            st.rerun() # Rerun to confirm selection visually if needed (might not be necessary)
-
+            # CORRECTED: Use streamlit_js_eval instead of sync
+            # This sends the update to JS without needing a return value immediately
+            streamlit_js_eval(js_code=f"updateSelectedObjectType({json.dumps(selected_tool)});", key=f"update_tool_js_{selected_tool}")
+            # Rerun to potentially update other UI elements if needed, though maybe optional
+            # if only JS state needs update for the tool. Let's keep it for now.
+            st.rerun()
 
         # --- Action Log ---
         st.markdown("---")