changes made

chatbot.py

@@ -14,6 +14,7 @@ if "db" not in st.session_state:
 
 if "chat_history" not in st.session_state:
     st.session_state.chat_history = []  # Stores past queries and responses
+
 if "agent_chain_output" not in st.session_state:
     st.session_state.agent_chain_output = ""
 
@@ -176,4 +177,4 @@ def main():
             st.error(f"An error occurred: {str(e)}")
 
 if __name__ == "__main__":
-    main()
+    main()