Update app.py

app.py

@@ -54,6 +54,9 @@ def tab4():
                 st.write(answer)
                 st.write(unique_metadata_list)
 
+    if st.sidebar.button("Clear Chat History"):
+        msgs.clear()
+
 
 def main():
     st.set_page_config(page_title="CIMA Chat", page_icon=":memo:", layout="wide")