usuniecie zbednego kodu i poprawki

app.py

@@ -2854,18 +2854,15 @@ def list_products():
             unique_items.append(item)
             seen_names.add(key)
 
-    stmt = (
-        select(
-            func.lower(func.trim(Item.name)).label("name_lower"),
-            func.coalesce(func.sum(Item.quantity), 0).label("qty_sum"),
+    usage_counts = dict(
+        db.session.query(
+            func.lower(Item.name),
+            func.coalesce(func.sum(Item.quantity), 0)
         )
-        .where(Item.name.isnot(None))
-        .group_by(func.lower(func.trim(Item.name)))
+        .group_by(func.lower(Item.name))
+        .all()
     )
 
-    rows = db.session.execute(stmt).all()
-    usage_counts = {name_lower: qty_sum for name_lower, qty_sum in rows}
-
     total_items = len(unique_items)
     total_pages = (total_items + per_page - 1) // per_page
     start = (page - 1) * per_page