Update app.py

app.py

@@ -75,6 +75,12 @@ if "message_limit" not in st.session_state:
 if "used_messages" not in st.session_state:
     st.session_state["used_messages"] = 0
 
+
+if "faiss_db" not in st.session_state:
+        st.session_state["faiss_db"] = None
+if "main_faiss_db" not in st.session_state:
+        refresh_main_faiss_index()  
+
 # Initialize logging and load environment variables
 logging.basicConfig(level=logging.INFO)
 logger = logging.getLogger(__name__)