moved search_client, chat_client, utils to middleware

components/stream_handler.py

@@ -11,8 +11,8 @@ def stream_handler(session_state, chat_stream, prompt, placeholder):
     full_response = ""
 
     for chunk in chat_stream:
-        if chunk.token["text"] != "</s>":
-            full_response += chunk.token["text"]
+        if chunk.token.text != "</s>":
+            full_response += chunk.token.text
             placeholder.markdown(full_response + "▌")
     placeholder.markdown(full_response)