refactor: enforce enum machine codes #18

Use owner enums for known codes; preserve wire values and unknown fallbacks.

Verified npm ci and verify: 379 tests, 5 lint checks, app and Storybook builds.

src/pages/account/ui/AccountPage/components/AccountPageError.view.tsx

@@ -5,12 +5,14 @@ import { StateView } from "@wealthledger/ui";
 import { useTranslation } from "react-i18next";
 import { Link } from "react-router";
 
+import { ApiErrorCode, isApiErrorCode } from "@/shared/api";
+
 type AccountPageErrorProps = { code?: string; retry: () => void };
 
 const AccountPageError: FC<AccountPageErrorProps> = (props) => {
 	const { code, retry } = props;
 	const { t } = useTranslation();
-	if (code === "NOT_FOUND")
+	if (isApiErrorCode(code, ApiErrorCode.NotFound))
 		return (
 			<StateView
 				action={(
@@ -23,7 +25,7 @@ const AccountPageError: FC<AccountPageErrorProps> = (props) => {
 				title={t("portfolio.accountUnavailableTitle")}
 			/>
 		);
-	if (code === "TBANK_NOT_CONNECTED" || code === "INVALID_TBANK_TOKEN")
+	if (isApiErrorCode(code, ApiErrorCode.TbankNotConnected) || isApiErrorCode(code, ApiErrorCode.InvalidTbankToken))
 		return (
 			<StateView
 				action={(
@@ -36,7 +38,7 @@ const AccountPageError: FC<AccountPageErrorProps> = (props) => {
 				title={t("portfolio.connectionErrorTitle")}
 			/>
 		);
-	if (code === "TBANK_UNAVAILABLE")
+	if (isApiErrorCode(code, ApiErrorCode.TbankUnavailable))
 		return (
 			<StateView
 				action={<Button onClick={retry}>{t("accounts.retry")}</Button>}