Update app.py

app.py

@@ -5,13 +5,15 @@ import tempfile
 import traceback
 from pathlib import Path
 from datetime import datetime
-import streamlit as st  # Import streamlit first
+import streamlit as st
+from langchain_community.document_loaders import PyPDFLoader  # Add this import
 from components.chat import display_chat_interface, ensure_embeddings_initialized
 from utils.database import (
     display_vector_store_info, 
     handle_document_upload,
     create_connection,
-    create_tables
+    create_tables,
+    insert_document  # Make sure this is imported
 )
 from utils.persistence import PersistenceManager
 from utils.document_chunker import DocumentChunker