Update app.py

app.py

@@ -508,6 +508,7 @@ if __name__ == '__main__':
                     disabled=False if st.session_state.id_chat != 'New Chat' else True
                 ):
                     st.session_state.id_chat = 'New Chat'
+                    st.session_state.messages = []
             with col2:
                 if st.button(
                     'Delete Chat', 
@@ -523,6 +524,11 @@ if __name__ == '__main__':
                             if conversation != conversations[st.session_state.id_chat]:
                                 st.session_state.id_chat = conversation
                                 break
+                                
+                    conversations.pop(tmp)
+                    with open(conversations_path, 'wb') as fp:
+                        packed_bytes = msgpack.packb(conversations, use_bin_type=True)
+                        fp.write(packed_bytes)
 
         def generate_conv_title(llm: vllm.LLM, tokenizer: AutoTokenizer):
             if st.session_state.chat_id == 'New Chat':