refactor: align frontend ownership boundaries

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

src/pages/accounts/ui/components/AccountsPageError.view.tsx

@@ -0,0 +1,59 @@
+import { Button, Stack } from "@mantine/core";
+import type { FC } from "react";
+import { useTranslation } from "react-i18next";
+import { Link } from "react-router";
+import { StateView } from "@/shared/ui";
+
+type AccountsPageErrorProps = { code?: string; retry?: () => void };
+
+const AccountsPageError: FC<AccountsPageErrorProps> = (props) => {
+	const { code, retry } = props;
+	const { t } = useTranslation();
+	const settingsAction = (
+		<Button component={Link} to="/settings" variant="light">
+			{t("accounts.openSettings")}
+		</Button>
+	);
+	if (code === "TBANK_NOT_CONNECTED")
+		return (
+			<StateView
+				error
+				title={t("accounts.notConnectedTitle")}
+				text={t("accounts.notConnectedText")}
+				action={settingsAction}
+			/>
+		);
+	if (code === "INVALID_TBANK_TOKEN")
+		return (
+			<StateView
+				error
+				title={t("accounts.invalidTokenTitle")}
+				text={t("accounts.invalidTokenText")}
+				action={settingsAction}
+			/>
+		);
+	if (code === "TBANK_UNAVAILABLE")
+		return (
+			<StateView
+				error
+				title={t("accounts.unavailableTitle")}
+				text={t("accounts.unavailableText")}
+				action={
+					<Stack align="flex-start">
+						<Button onClick={retry}>{t("accounts.retry")}</Button>
+						{settingsAction}
+					</Stack>
+				}
+			/>
+		);
+	return (
+		<StateView
+			error
+			title={t("states.errorTitle")}
+			text={t("states.errorText")}
+			action={<Button onClick={retry}>{t("accounts.retry")}</Button>}
+		/>
+	);
+};
+
+export { AccountsPageError };