This code involves using Streamlit to create a chat interface:
with st.chat_message("user"):
creates a chat message container with the user's name displayed as "user".
st.write("Hello 👋")
writes a greeting message.
st.line_chart(np.random.randn(30, 3))
displays a line chart with random data.
st.chat_input("Say something")
displays a chat input widget where the user can type a message.