feat: add top items on admin page

frontend/src/pages/AdminPage.jsx

@@ -4,6 +4,7 @@ import AdminItems from "../components/AdminItems";
 import AdminOrders from "../components/AdminOrders";
 import AdminStock from "../components/AdminStock";
 import AdminStaff from "../components/AdminStaff";
+import AdminTopItems from "../components/AdminTopItems";
 
 export default function AdminPage() {
   const [tab, setTab] = useState("items");
@@ -13,6 +14,7 @@ export default function AdminPage() {
     { key: "orders", label: "Заказы" },
     { key: "stock", label: "Склад" },
     { key: "staff", label: "Сотрудники" },
+    { key: "topItems", label: "Лидеры продаж" },
   ];
 
   return (
@@ -41,6 +43,7 @@ export default function AdminPage() {
         {/* Содержимое активной вкладки */}
         {tab === "items" && <AdminItems />}
         {tab === "orders" && <AdminOrders />}
+        {tab === "topItems" && <AdminTopItems />}
         {tab === "stock" && <AdminStock />}
         {tab === "staff" && <AdminStaff />}
       </main>