Update app.py

app.py

@@ -15,6 +15,7 @@ from langgraph.graph.message import add_messages
 from smolagents import ToolCallingAgent, LiteLLMModel, tool, DuckDuckGoSearchTool
 from langchain_community.utilities import WikipediaAPIWrapper
 
+import uuid
 
 # (Keep Constants as is)
 # --- Constants ---