changes to the mahnungen_admin

Web/app.py

@@ -3641,6 +3641,7 @@ def test_mahnungen():
             return val
 
     current_time = datetime.datetime.now(ZoneInfo("Europe/Berlin"))
+    current_time_naive = current_time.replace(tzinfo=None)
     client = None
 
     try:
@@ -3722,8 +3723,10 @@ def test_mahnungen():
                         or '—'
                 )
 
-                due_date_obj = record.get('DueDate')
-                days_overdue = (current_time - due_date_obj).days if due_date_obj else 0
+                # KORREKTUR: 'record' statt 'appt'
+                due_date = record.get('DueDate', current_time)
+                due_date_naive = due_date.replace(tzinfo=None) if due_date else current_time_naive
+                days_overdue = (current_time_naive - due_date_naive).days
                 is_blocked = user_block_map.get(raw_user, False)
 
                 overdue_list.append({
@@ -3731,7 +3734,7 @@ def test_mahnungen():
                     'item_name': item_name,
                     'user': display_user,
                     'klasse': user_class,
-                    'due_date': fmt_dt(due_date_obj),
+                    'due_date': fmt_dt(due_date), # KORREKTUR: 'due_date' statt 'due_date_obj'
                     'days_overdue': days_overdue,
                     'mahnstufe': record.get('Mahnstufe', 0),
                     'is_blocked': is_blocked
@@ -3823,6 +3826,7 @@ def mahnungen_admin():
             return val
 
     current_time = datetime.datetime.now(ZoneInfo("Europe/Berlin"))
+    current_time_naive = current_time.replace(tzinfo=None)
     client = None
 
     try:
@@ -3833,7 +3837,6 @@ def mahnungen_admin():
         users_col = db['users']
         student_cards_col = db['student_cards']
 
-        # Überfällige Ausleihen abrufen (Status 'active' und DueDate in der Vergangenheit)
         overdue_records = list(ausleihungen_col.find({
             'Status': 'active',
             'DueDate': {'$lt': current_time}
@@ -3842,7 +3845,6 @@ def mahnungen_admin():
         overdue_list = []
 
         if overdue_records:
-            # Bulk-Lookups zur Vermeidung von N+1 Queries
             item_ids = []
             for r in overdue_records:
                 i_id = r.get('Item')
@@ -3880,7 +3882,6 @@ def mahnungen_admin():
                 if ausweis_id:
                     class_map[str(ausweis_id).strip().lower()] = dec_cls
 
-            # Datenaufbereitung für das Template
             for record in overdue_records:
                 item_id = str(record.get('Item') or '')
                 item_doc = item_map.get(item_id, {})
@@ -3905,7 +3906,13 @@ def mahnungen_admin():
                 )
 
                 due_date_obj = record.get('DueDate')
-                days_overdue = (current_time - due_date_obj).days if due_date_obj else 0
+
+                if due_date_obj:
+                    due_date_naive = due_date_obj.replace(tzinfo=None) if due_date_obj.tzinfo else due_date_obj
+                    days_overdue = (current_time_naive - due_date_naive).days
+                else:
+                    days_overdue = 0
+
                 is_blocked = user_block_map.get(raw_user, False)
 
                 overdue_list.append({