fix(tbank): reset connection-derived query cache

src/entities/brokerage-account/api/useBrokerageAccounts.test.tsx

@@ -59,4 +59,37 @@ describe("useBrokerageAccounts", () => {
 			},
 		]);
 	});
+
+	it("keeps the current connection snapshot after a background refetch error", async () => {
+		configureAuthClient({
+			accessToken: () => "token",
+			refresh: async () => true,
+			clear: vi.fn(),
+		});
+		let calls = 0;
+		server.use(
+			http.get("*/api/v1/brokerage-accounts", () => {
+				calls += 1;
+				return calls === 1
+					? HttpResponse.json([
+							{
+								id: "account-1",
+								name: "Основной",
+								type: "BROKERAGE",
+								openedOn: "2024-08-13",
+							},
+						])
+					: HttpResponse.json({ code: "TBANK_UNAVAILABLE" }, { status: 503 });
+			}),
+		);
+		const { result } = renderHook(() => useBrokerageAccounts(), {
+			wrapper: createWrapper(),
+		});
+
+		await waitFor(() => expect(result.current.isSuccess).toBe(true));
+		void result.current.refetch();
+		await waitFor(() => expect(result.current.isError).toBe(true));
+
+		expect(result.current.data?.[0].id).toBe("account-1");
+	});
 });