refactor: align frontend ownership boundaries

Close audit gaps across API drift, query policy, UI, and tests.

src/pages/account-operations/ui/AccountOperationsPage.tsx

@@ -1,5 +1,4 @@
 import type { FC } from "react";
-import { LedgerEntryRow } from "@/entities/broker-operation";
 import { useAccountOperationsPageVm } from "./AccountOperationsPage.vm";
 import { AccountOperationsPageError } from "./components/AccountOperationsPageError.view";
 import { AccountOperationsPageLoaded } from "./components/AccountOperationsPageLoaded.view";
@@ -19,4 +18,4 @@ const AccountOperationsPage: FC = () => {
 	return <AccountOperationsPageLoaded {...viewModel} />;
 };
 
-export { AccountOperationsPage, LedgerEntryRow as OperationRow };
+export { AccountOperationsPage };