fix(api): align frontend with REST contracts

src/app/login/page.test.tsx

@@ -0,0 +1,45 @@
+import { act, fireEvent, render, screen } from "@testing-library/react";
+import Login from "./page";
+
+const mockLogin = jest.fn();
+
+jest.mock("@refinedev/core", () => ({
+  useLogin: () => ({ mutate: mockLogin }),
+}));
+
+describe("Login", () => {
+  beforeEach(() => {
+    jest.useFakeTimers();
+    mockLogin.mockClear();
+  });
+
+  afterEach(() => {
+    jest.useRealTimers();
+  });
+
+  it("starts Keycloak login once when the page opens", () => {
+    const { rerender } = render(<Login />);
+
+    expect(mockLogin).toHaveBeenCalledTimes(1);
+    expect(mockLogin).toHaveBeenCalledWith({});
+    expect(screen.getByText("正在进入账号登录")).toBeInTheDocument();
+
+    rerender(<Login />);
+    expect(mockLogin).toHaveBeenCalledTimes(1);
+  });
+
+  it("shows a manual fallback when automatic redirect does not complete", () => {
+    render(<Login />);
+
+    expect(
+      screen.queryByRole("button", { name: "继续登录" }),
+    ).not.toBeInTheDocument();
+
+    act(() => {
+      jest.advanceTimersByTime(4000);
+    });
+
+    fireEvent.click(screen.getByRole("button", { name: "继续登录" }));
+    expect(mockLogin).toHaveBeenCalledTimes(2);
+  });
+});