Update app.py

app.py

@@ -3,6 +3,7 @@ from utils.vector_store import VectorStore
 from utils.document_processor import DocumentProcessor
 from utils.case_manager import CaseManager
 from utils.legal_notebook_interface import LegalNotebookInterface
+from utils.case_manager_interface import CaseManagerInterface
 from datetime import datetime
 import os
 from pathlib import Path