usuniecie zbednego kodu i poprawki

app.py

@@ -2882,6 +2882,15 @@ def list_products():
         if name not in used_suggestion_names
     ]
 
+    usage_counts = dict(
+        db.session.query(
+            func.lower(Item.name),
+            func.coalesce(func.sum(Item.quantity), 0)
+        )
+        .group_by(func.lower(Item.name))
+        .all()
+    )
+
     query_string = urlencode({k: v for k, v in request.args.items() if k != "page"})
 
     return render_template(
@@ -2894,7 +2903,8 @@ def list_products():
         per_page=per_page,
         total_pages=total_pages,
         query_string=query_string,
-        total_items=total_items
+        total_items=total_items,
+        usage_counts=usage_counts
     )