Update app.py

app.py

@@ -99,10 +99,12 @@ for message in st.session_state.messages:
     role_class = "user-message" if message["role"] == "user" else "bot-message"
     st.markdown(f'<div class="{role_class} message-box">{message["content"]}</div>', unsafe_allow_html=True)
 
-# ✅ User Input
-user_input = st.text_input("How can I help you today?", key="input")
+# ✅ User Input Form (Allows "Enter" to Send)
+with st.form("chat_form", clear_on_submit=True):
+    user_input = st.text_input("How can I help you today?", key="input")
+    submit_button = st.form_submit_button("Send")
 
-if st.button("Send") and user_input:
+if submit_button and user_input:
     try:
         response = client.chat.completions.create(
             model="gpt-3.5-turbo",
@@ -117,8 +119,8 @@ if st.button("Send") and user_input:
         st.session_state.messages.append({"role": "user", "content": user_input})
         st.session_state.messages.append({"role": "bot", "content": bot_reply})
 
-        # Refresh the page to display messages
-        st.experimental_rerun()
+        # ✅ Use st.rerun() instead of experimental_rerun
+        st.rerun()
 
     except Exception as e:
         st.error(f"Error: {str(e)}")