Update app.py

app.py

@@ -189,6 +189,8 @@ with st.form(key="chat_form", clear_on_submit=True):
     user_message = st.text_area("Enter your message (e.g., request modifications)", height=100)
     submit_chat = st.form_submit_button("Send")
     
+# ... (previous code remains unchanged)
+
 if submit_chat and user_message.strip():
     # Append the new user message to chat history.
     st.session_state.chat_history.append({"role": "user", "content": user_message})
@@ -208,5 +210,8 @@ if submit_chat and user_message.strip():
     except Exception as e:
         st.error(f"An error occurred while calling the API: {e}")
 
-    # Refresh the chat display.
-    st.experimental_rerun()
+    # Conditionally rerun if available, otherwise inform the user.
+    if hasattr(st, "experimental_rerun"):
+        st.experimental_rerun()
+    else:
+        st.info("Please refresh the page to see the updated conversation.")