add uuid for each new chat

scripts/demo_chat.py

@@ -1,5 +1,7 @@
 import tyro
 from typing import Annotated
+import uuid
+
 
 from lang_agent.pipeline import Pipeline, PipelineConfig
 from lang_agent.config import load_tyro_conf
@@ -19,7 +21,7 @@ def main(
         conf = load_tyro_conf(conf.config_f)
     
     pipeline: Pipeline = conf.setup()
-    
+    thread_id = str(uuid.uuid4())
     while True:
         user_input = input("请讲：")
         if user_input.lower() == "exit":
@@ -28,12 +30,12 @@ def main(
         if stream:
             # Streaming mode: print chunks as they arrive
             print("回答: ", end="", flush=True)
-            for chunk in pipeline.chat(user_input, as_stream=True):
+            for chunk in pipeline.chat(user_input, as_stream=True, thread_id=thread_id):
                 print(chunk, end="", flush=True)
             print()  # New line after streaming completes
         else:
             # Non-streaming mode: print full response
-            response = pipeline.chat(user_input, as_stream=False)
+            response = pipeline.chat(user_input, as_stream=False, thread_id=thread_id)
             print(f"回答: {response}")