Update src/streamlit_app.py

src/streamlit_app.py

@@ -119,6 +119,8 @@ with st.sidebar:
     # Add clear history button
     if st.button("Clear History"):
         st.session_state.messages = []
+        st.rerun()
+
 
 # Accept user input
 if prompt := st.chat_input("Enter a question based on a selected task."):