refactor: simplify errors and focus tests

src/features/tbank-connection/ui/TbankConnectionSection/TbankConnectionSection.test.tsx

@@ -292,31 +292,47 @@ describe("TbankConnectionSection", () => {
 		expect(client.getQueryData(operationsQueryKey)).toBeUndefined();
 	});
 
-	it("preserves status and financial cache when a connection update fails", async () => {
-		server.use(
-			http.put("*/api/v1/tbank-connection", () =>
-				HttpResponse.json({ code: "TBANK_UNAVAILABLE" }, { status: 503 }),
-			),
-		);
+	it.each([
+		["INVALID_TBANK_TOKEN", "Проверьте token и его права."],
+		["TBANK_UNAVAILABLE", "T-Bank временно недоступен. Повторите попытку позже."],
+		[undefined, "Не удалось выполнить запрос. Попробуйте ещё раз."],
+	])("preserves the draft and cache after %s, then retries successfully", async (code, message) => {
+		const { promise: response, resolve: finishUpdate }
+			= Promise.withResolvers<Response>();
+
+		const update = vi.fn()
+			.mockImplementationOnce(() =>
+				HttpResponse.json({ code }, { status: 503 }),
+			)
+			.mockImplementationOnce(() => response);
+
+		server.use(http.put("*/api/v1/tbank-connection", update));
 		const client = seededClient();
 		renderSection(client);
 
 		await screen.findByText("Не подключено");
-		fireEvent.change(screen.getByLabelText("Token T-Bank"), {
-			target: { value: "replacement-token" },
-		});
+		const token = screen.getByLabelText("Token T-Bank");
+		fireEvent.change(token, { target: { value: "replacement-token" } });
 		fireEvent.click(screen.getByRole("button", { name: "Подключить" }));
 
-		await screen.findByText(
-			"T-Bank временно недоступен. Повторите попытку позже.",
-		);
-		expect(
-			screen.getByRole("button", { name: "Подключить" }),
-		).toBeInTheDocument();
+		await screen.findByText(message);
+		expect(token).toHaveValue("replacement-token");
+		expect(screen.getByText("Не подключено")).toBeVisible();
 		expect(client.getQueryData(brokerageAccountsQueryKey)).toBeDefined();
 		expect(client.getQueryData(portfolioQueryKey)).toEqual({
 			source: "previous-connection",
 		});
+		fireEvent.click(screen.getByRole("button", { name: "Подключить" }));
+		await waitFor(() => expect(update).toHaveBeenCalledTimes(2));
+		expect(screen.queryByText(message)).not.toBeInTheDocument();
+		expect(token).toBeDisabled();
+		expect(token).toHaveValue("replacement-token");
+		finishUpdate(HttpResponse.json({
+			connected: true, connectedAt: "2026-08-14T00:00:00Z",
+		}));
+		expect(await screen.findByText("Подключено с 14.08.2026")).toBeVisible();
+		expect(token).toHaveValue("");
+		expect(screen.queryByText(message)).not.toBeInTheDocument();
 	});
 
 	it("keeps DELETE recovery inside the dialog and preserves cache until successful retry", async () => {