Changes to the username displayment

Web/app.py

@@ -4491,7 +4491,6 @@ def api_item_detail(item_id):
         db = client[MONGODB_DB]
         ausleihungen_col = db['ausleihungen']
         items_col = db['items']
-        student_cards_col = db['student_cards']
 
         # Determine parent/group id (if this is a child, use its ParentItemId)
         parent_id = str(item.get('ParentItemId') or str(item.get('_id')))
@@ -4532,15 +4531,7 @@ def api_item_detail(item_id):
         def get_borrower_name(user_raw):
             if not user_raw:
                 return ''
-            try:
-                user_doc = student_cards_col.find_one({'_id': ObjectId(user_raw)})
-                if user_doc:
-                    if user_doc.get('SchülerName'):
-                        return decrypt_text(str(user_doc.get('SchülerName', '')))
-                    return str(user_doc.get('AusweisId', ''))
-            except Exception:
-                pass
-            return str(user_raw)
+            return _display_username(user_raw)
 
         # Prefer the most recent active borrower across the group
         borrower_value = ''