Fix relative imports for deployment

backend/app.py

@@ -3,8 +3,9 @@
 from transformers import pipeline
 import gradio as gr
 import pandas as pd
-from gmail_fetcher import fetch_latest_emails
-import database
+# NEW, CORRECTED LINES
+from .gmail_fetcher import fetch_latest_emails
+from . import database
 
 # --- This is the core change ---
 # 1. We load a pre-trained "zero-shot-classification" pipeline from Hugging Face.