Debug logging implementation and changes to the User entcryption

Web/app.py

@@ -4461,6 +4461,7 @@ 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')))
@@ -4503,8 +4504,10 @@ def api_item_detail(item_id):
             if rec.get('Status') == 'active' and rec.get('User'):
                 try:
                     user_raw = rec.get('User')
-                    if user_raw is not None:
-                        borrower_value = decrypt_text(str(user_raw))
+                    user_doc = student_cards_col.find_one({'_id': ObjectId(user_raw)}) if user_raw else None
+                    app.logger.debug(f"Line 4508: Found user_doc for borrower: {user_doc}")
+                    if user_doc:
+                        borrower_value = decrypt_text(str(user_doc.get('SchülerName', ''))) if user_doc.get('SchülerName') else str(user_doc.get('AusweisId', ''))
                 except Exception:
                     borrower_value = str(rec.get('User', ''))
                 break
@@ -4512,8 +4515,10 @@ def api_item_detail(item_id):
         if not borrower_value and item.get('User'):
             try:
                 item_user = item.get('User')
+                app.logger.debug(f"Line 4518: Found item_user for borrower: {item_user}")
                 if item_user is not None:
                     borrower_value = decrypt_text(str(item_user))
+                    app.logger.debug(f"Line 4521: Decrypted borrower_value from item.User: {borrower_value}")
             except Exception:
                 borrower_value = str(item.get('User', ''))
 
@@ -4530,6 +4535,7 @@ def api_item_detail(item_id):
             
             for rec in borrow_records[:3]:
                 user_raw = rec.get('User')
+                app.logger.debug(f"Line 4538: Processing borrow record: {rec}")
                 try:
                     user = decrypt_text(user_raw) if user_raw is not None else ''
                 except Exception:
@@ -4556,7 +4562,7 @@ def api_item_detail(item_id):
         <p><strong>Kategorie:</strong> {html.escape(str(item.get('library_category', '-')))}</p>
         <p><strong>Beschreibung:</strong> {html.escape(str(item.get('Beschreibung', '-')))}</p>
         <p><strong>Status:</strong> {html.escape(str(status_label))}</p>
-        {f'<p><strong>Ausgeliehen von:</strong> {html.escape(str(decrypt_text(borrower_value)))}</p>' if borrower_value and status_label == 'Ausgeliehen' else ''}
+        {f'<p><strong>Ausgeliehen von:</strong> {html.escape(str(borrower_value))}</p>' if borrower_value and status_label == 'Ausgeliehen' else ''}
         {borrows_html}
         """
         ctx = get_tenant_context()