test(ui): unmount before asserting so the auto-sync timer cannot outlive the test

Vitest went red on 'synchronizes upstream models only when autoFetchModels is
explicitly true' with new URL throwing inside a fetch dispatched from
Timeout._onTimeout (useProviderModels.ts:69). It is intermittent: green in the two
previous CI runs, green every time in isolation, red only under the ui suite's 20
parallel workers.

The hook schedules its auto-sync in a setTimeout whose callback only checks the
 flag on entry — and that flag stays false while the component is
mounted. Both tests asserted first and unmounted last, so under contention the
timer escaped the test window, fired after afterEach had already run
vi.unstubAllGlobals(), and reached the REAL fetch with a relative URL.

Unmounting before the assertions closes the window: cleanup flips , the
callback returns early, and the calls already recorded on fetchMock are still there
to assert against. No assertion changed.

Not a regression from this cycle — the file's last change is fd76271515 (#10603).
Fixed rather than tracked because an intermittent red in a blocking job is worse
than a permanent one: it teaches people to re-run instead of to look.

Refs #10692

tests/unit/ui/use-provider-models-auto-fetch.test.tsx

@@ -6,9 +6,8 @@ vi.mock("next-intl", () => ({
   useTranslations: () => (key: string) => key,
 }));
 
-const { useProviderModels } = await import(
+const { useProviderModels } =
-  "@/app/(dashboard)/dashboard/providers/hooks/useProviderModels"
+  await import("@/app/(dashboard)/dashboard/providers/hooks/useProviderModels");
-);
 
 function createResponse(body: unknown, ok = true): Response {
   return {
@@ -67,11 +66,21 @@ describe("useProviderModels upstream auto-fetch", () => {
     const mounted = await renderProviderModels();
     await flushQueuedSync();
 
+    // Desmontar ANTES de asserir. O hook agenda a auto-sync num setTimeout e o
+    // callback so checa o flag `cancelled` na entrada; enquanto o componente
+    // estiver montado esse flag e false. Se o timer escapar da janela do teste,
+    // ele dispara depois do afterEach ja ter feito unstubAllGlobals() e cai no
+    // fetch REAL com uma URL relativa — `new URL` estoura e derruba o arquivo.
+    // Isso nao acontece com a maquina ociosa, so sob os 20 workers da suite
+    // cheia, e foi assim que este teste virou vermelho intermitente no CI.
+    // Desmontar primeiro faz `cancelled` virar true e o callback sair cedo; as
+    // chamadas ja registradas no fetchMock continuam disponiveis para o assert.
+    mounted.unmount();
+
     expect(fetchMock).not.toHaveBeenCalledWith(
       "/api/providers/connection-1/sync-models?mode=sync",
       expect.anything()
     );
-    mounted.unmount();
   });
 
   it("synchronizes upstream models only when autoFetchModels is explicitly true", async () => {
@@ -101,10 +110,11 @@ describe("useProviderModels upstream auto-fetch", () => {
     const mounted = await renderProviderModels();
     await flushQueuedSync();
 
-    expect(fetchMock).toHaveBeenCalledWith(
+    // Mesmo motivo do teste acima: desmontar fecha a janela do timer vazado.
-      "/api/providers/connection-1/sync-models?mode=sync",
-      { method: "POST" }
-    );
     mounted.unmount();
+
+    expect(fetchMock).toHaveBeenCalledWith("/api/providers/connection-1/sync-models?mode=sync", {
+      method: "POST",
+    });
   });
 });