Update app.py

app.py

@@ -241,7 +241,7 @@ if section == 'Data Quality':
     )
     
     # Determine end of data slice (yesterday 23:59:59)
-    yesterday = datetime.now(tz).date() - datetime.timedelta(days=1)
+    yesterday = datetime.now(tz).date() - timedelta(days=1)
     end_time = pd.Timestamp(yesterday).replace(hour=23, minute=59, second=59)
     # Filter data
     data_quality = data[data.index <= end_time]