fix test: use never-resolving promise and fake timers for withTimeout

The previous mock used mockRejectedValue which immediately rejects,
so Promise.race resolved before withTimeout's setTimeout fired.
Now we use new Promise(() => {}) to simulate a hanging request
and advance timers to properly exercise the 2s timeout logic.

Co-Authored-By: Paperclip <noreply@paperclip.ing>

src/api/IntelGpuDataContext.test.tsx

@@ -155,25 +155,23 @@ describe('IntelGpuDataProvider', () => {
   it('treats a hanging CRD request as unavailable after 2s timeout', async () => {
     vi.useFakeTimers();
     const nodeWrapper = { jsonData: {} };
-    vi.mocked(K8s.ResourceClasses.Node.useList).mockReturnValue([
-      [nodeWrapper],
-      null,
-    ] as any);
-    vi.mocked(K8s.ResourceClasses.Pod.useList).mockReturnValue([
-      [nodeWrapper],
-      null,
-    ] as any);
-    vi.mocked(ApiProxy.request).mockRejectedValue(
-      new Error('Request timed out after 2000ms')
-    );
+    vi.mocked(K8s.ResourceClasses.Node.useList).mockReturnValue([[nodeWrapper], null] as any);
+    vi.mocked(K8s.ResourceClasses.Pod.useList).mockReturnValue([[nodeWrapper], null] as any);
+    vi.mocked(ApiProxy.request).mockReturnValue(new Promise(() => {}));
 
     const { result } = renderHook(() => useIntelGpuContext(), { wrapper: Wrapper });
 
     await act(async () => {
-      await vi.advanceTimersByTimeAsync(100);
+      await vi.advanceTimersByTimeAsync(1999);
     });
-    expect(result.current.loading).toBe(false);
+    expect(result.current.loading).toBe(true);
+
+    await act(async () => {
+      await vi.advanceTimersByTimeAsync(200);
+    });
+    await waitFor(() => expect(result.current.loading).toBe(false));
     expect(result.current.crdAvailable).toBe(false);
+
     vi.useRealTimers();
   });
 });