Update app.py

app.py

@@ -815,7 +815,7 @@ if __name__ == '__main__':
         def generate_conv_title(llm):
             st.session_state.local_user_input = st.session_state.user_input
             print(f'USER INPUT : {st.session_state.user_input}')
-            st.session_state.user_input = ""
+            st.session_state.user_input = " "
             if st.session_state.chat_id == 'New Conversation':
                 output = llm.chat(
                     build_prompt_conv(st.session_state.local_user_input),
@@ -836,7 +836,7 @@ if __name__ == '__main__':
             st.session_state.search_strategy = pills("", ["Exact Search", "Explain Further"], ["🎯", "🚀"], index=None)
             
         if prompt := _bottom.text_input(
-            "",
+            " ",
             value=st.session_state.search_strategy + ' : ' if (st.session_state.search_strategy != None) and (st.session_state.local_user_input == None) else "",
             on_change=generate_conv_title, 
             key='user_input',