fix: keep session when refresh fails on network error or 5xx (WealthLedger/frontend#97)

src/shared/api/client.test.ts

@@ -67,6 +67,25 @@ describe("apiClient authentication", () => {
 		expect(clear).toHaveBeenCalledOnce();
 	});
 
+	it("keeps the session when refresh failed because the server was unreachable", async () => {
+		const clear = vi.fn();
+		server.use(
+			http.get("*/api/v1/brokerage-accounts", () =>
+				HttpResponse.json({ code: "UNAUTHORIZED" }, { status: 401 }),
+			),
+		);
+		configureAuthClient({
+			accessToken: () => "expired",
+			clear,
+			refresh: () => Promise.resolve(false),
+			unavailable: () => true,
+		});
+
+		await apiClient.GET("/api/v1/brokerage-accounts");
+
+		expect(clear).not.toHaveBeenCalled();
+	});
+
 	it("does not attach Bearer auth to authentication endpoints", async () => {
 		let authorization: null | string
 

src/shared/api/client.ts

@@ -32,6 +32,10 @@ type AuthHandlers = {
 	clear: () => void;
 	generation?: () => number;
 	refresh: () => Promise<boolean>;
+	/**
+	True after a refresh failed transiently (network/5xx): the session is not proven gone.
+	*/
+	unavailable?: () => boolean;
 };
 
 type ReadAttempt = {
@@ -100,7 +104,8 @@ async function authenticatedFetch(request: Request): Promise<Response> {
 	if (!isCurrent()) throw new DOMException("Session changed", "AbortError");
 
 	if (!(await sessionState.handlers.refresh())) {
-		if (isCurrent()) sessionState.handlers.clear();
+		if (isCurrent() && !sessionState.handlers.unavailable?.())
+			sessionState.handlers.clear();
 
 		return response;
 	}

src/shared/i18n/locales/ru.ts

@@ -53,6 +53,9 @@ const ru = {
 			passwordConfirmation: "Подтвердите пароль",
 			register: "Регистрация",
 			requestError: "Не удалось выполнить запрос. Попробуйте ещё раз.",
+			retry: "Повторить",
+			unavailableText: "Сервер временно недоступен. Ваш вход сохранён, попробуйте через минуту.",
+			unavailableTitle: "Не удалось подключиться",
 			validation: {
 				invalidEmail: "Некорректный email",
 				invalidPasswordLength: "Пароль: от 8 до 72 символов, только латинские буквы, цифры, спецсимволы и пробел",