test(dashboard): add smoke test for home client dashboard (#4793)

Smoke test guarding the dashboard home client render (regression #4745/#4759). Code fix already landed via #4761; this PR's jsdom smoke test is the net-new regression guard. Integrated into release/v3.8.35.

tests/unit/ui/home-page-client-dashboard-smoke-4615.test.tsx

@@ -0,0 +1,161 @@
+// @vitest-environment jsdom
+import React from "react";
+import { act } from "react";
+import { createRoot } from "react-dom/client";
+import { afterEach, beforeEach, expect, it, vi } from "vitest";
+
+function makeTranslator() {
+  const t = (key: string) => key;
+  t.rich = (key: string) => key;
+  return t;
+}
+
+vi.mock("next-intl", () => ({
+  useTranslations: () => makeTranslator(),
+}));
+
+vi.mock("next/navigation", () => ({
+  useRouter: () => ({
+    push: vi.fn(),
+    replace: vi.fn(),
+    refresh: vi.fn(),
+  }),
+}));
+
+vi.mock("next/link", () => ({
+  default: ({ href, children, ...props }: React.AnchorHTMLAttributes<HTMLAnchorElement>) => (
+    <a href={String(href)} {...props}>
+      {children}
+    </a>
+  ),
+}));
+
+vi.mock("next/dynamic", () => ({
+  default: () =>
+    function DynamicStub() {
+      return <div data-testid="dynamic-component" />;
+    },
+}));
+
+vi.mock("@/shared/components", () => ({
+  Card: ({ children }: { children: React.ReactNode }) => <section>{children}</section>,
+  CardSkeleton: () => <div data-testid="card-skeleton" />,
+  Button: ({
+    children,
+    loading: _loading,
+    fullWidth: _fullWidth,
+    variant: _variant,
+    size: _size,
+    ...props
+  }: React.ButtonHTMLAttributes<HTMLButtonElement> & {
+    loading?: boolean;
+    fullWidth?: boolean;
+    variant?: string;
+    size?: string;
+  }) => <button {...props}>{children}</button>,
+  Modal: ({ children, isOpen }: { children: React.ReactNode; isOpen: boolean }) =>
+    isOpen ? <div role="dialog">{children}</div> : null,
+}));
+
+vi.mock("@/shared/components/ProviderIcon", () => ({
+  default: () => <span data-testid="provider-icon" />,
+}));
+
+const notifyMock = {
+  success: vi.fn(),
+  error: vi.fn(),
+  addNotification: vi.fn(),
+};
+
+function useNotificationStoreMock() {
+  return notifyMock;
+}
+useNotificationStoreMock.getState = () => notifyMock;
+
+vi.mock("@/store/notificationStore", () => ({
+  useNotificationStore: useNotificationStoreMock,
+}));
+
+vi.mock("@/shared/hooks/useElectron", () => ({
+  useIsElectron: () => false,
+  useOpenExternal: () => ({ openExternal: vi.fn() }),
+}));
+
+vi.mock("@/shared/utils/clipboard", () => ({
+  copyToClipboard: vi.fn(async () => undefined),
+}));
+
+const { default: HomePageClient } =
+  await import("../../../src/app/(dashboard)/dashboard/HomePageClient");
+
+function jsonResponse(body: unknown) {
+  return {
+    ok: true,
+    json: async () => body,
+  } as Response;
+}
+
+let container: HTMLDivElement;
+let root: ReturnType<typeof createRoot>;
+
+beforeEach(() => {
+  (
+    globalThis as typeof globalThis & { IS_REACT_ACT_ENVIRONMENT?: boolean }
+  ).IS_REACT_ACT_ENVIRONMENT = true;
+
+  vi.stubGlobal(
+    "fetch",
+    vi.fn((input: RequestInfo | URL) => {
+      const url = String(input);
+      if (url === "/api/settings") {
+        return Promise.resolve(
+          jsonResponse({
+            showQuickStartOnHome: true,
+            showProviderTopologyOnHome: false,
+          })
+        );
+      }
+      if (url === "/api/providers") {
+        return Promise.resolve(jsonResponse({ connections: [] }));
+      }
+      if (url === "/api/models") {
+        return Promise.resolve(jsonResponse({ models: [] }));
+      }
+      if (url === "/api/system/version") {
+        return Promise.resolve(
+          jsonResponse({
+            current: "0.0.0-test",
+            latest: "0.0.0-test",
+            updateAvailable: false,
+            channel: "test",
+            autoUpdateSupported: false,
+          })
+        );
+      }
+      if (url === "/api/provider-nodes") {
+        return Promise.resolve(jsonResponse({ nodes: [] }));
+      }
+      return Promise.resolve(jsonResponse({}));
+    })
+  );
+
+  container = document.createElement("div");
+  document.body.appendChild(container);
+  root = createRoot(container);
+});
+
+afterEach(() => {
+  act(() => root.unmount());
+  container.remove();
+  vi.unstubAllGlobals();
+  vi.clearAllMocks();
+});
+
+it("renders the dashboard home client without throwing an internal server error", async () => {
+  await act(async () => {
+    root.render(<HomePageClient machineId="test-machine" />);
+  });
+
+  expect(container.textContent).not.toContain("Internal Server Error");
+  expect(container.textContent).toContain("quickStart");
+});