prompts suggestions and pdf fix

chat_with_pps.py

@@ -331,6 +331,9 @@ def display_chat():
                 st.write(response)
                 st.session_state.chat_history.append(AIMessage(content=response))
             else:
+                st.markdown(f"**{st.session_state.model}**")
+                if st.session_state.model not in st.session_state.used_models:
+                    st.session_state.used_models.append(st.session_state.model)
                 response = st.write_stream(get_response(last_message.content, st.session_state.chat_history,format_context(st.session_state['pp_grouped'],st.session_state['Nom de la marque']),st.session_state.model))
                 st.session_state.chat_history.append(AIMessage(content=response))
                 with st.spinner("Proposition de prompts..."):