imports fix

src/streamlit_app.py

@@ -1,7 +1,7 @@
 import streamlit as st
 from styles import apply_styling
 from utils import remove_reasoning_and_sources, clean_explanation
-from session_state import initialize_session_state, add_message_to_history, get_full_history
+from session_state import initialize_session_state, add_message_to_history
 from chat_display import display_chat_history, show_typing_indicator, display_legal_disclaimer
 from model import (
     orchestrator_chat,