Fix preprocessing module import path

app.py

@@ -8,17 +8,18 @@ import time
 import uuid
 import logging
 import streamlit as st
-from datetime import datetime
-from PIL import Image
+import pandas as pd
 import numpy as np
 import cv2
+from datetime import datetime
+from PIL import Image
 
 # Import app modules
 from config import settings
 from agent_framework.agent_manager import AgentManager
 from utils.file_utils import allowed_file, save_uploaded_file
 from utils.export_utils import get_download_link
-from utils.preprocessing import show_preprocessing_ui
+from utils.preprocessing_ui import show_preprocessing_ui
 from utils.simple_face_labeling import simple_face_detection_and_labeling_ui
 from utils.face_validation import validate_image_faces, display_face_validation_result, should_continue_processing
 from services.database_service import DatabaseService