Update app.py

app.py

@@ -1,8 +1,8 @@
 # app.py
 import streamlit as st
 import os
-import sqlite3
 from pathlib import Path
+from datetime import datetime
 from components.chat import display_chat_interface
 from utils.database import (
     display_vector_store_info, 
@@ -10,7 +10,9 @@ from utils.database import (
     create_connection,
     create_tables
 )
-from backend import get_embeddings_model  # Add this import
+from utils.persistence import PersistenceManager
+from utils.document_chunker import DocumentChunker  # Make sure this path is correct
+from backend import get_embeddings_model, initialize_qa_system, initialize_faiss
 import time
 
 def initialize_database():