fix(web): gate zone-records fetch to no-template case; wait for domains load before branching

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

web/src/pages/DomainDiffPage.test.tsx

@@ -49,6 +49,7 @@ test("apply sends applyPrunes=false by default, true only after opting in", asyn
     readOnly: [], inSyncCount: 0,
   })
   const applySpy = vi.spyOn(api, "applyDomain").mockResolvedValue({ updates: [], prunes: [], readOnly: [], inSyncCount: 0 })
+  const zoneRecordsSpy = vi.spyOn(api, "zoneRecords")
   const user = userEvent.setup()
   renderPage()
 
@@ -63,6 +64,32 @@ test("apply sends applyPrunes=false by default, true only after opting in", asyn
   await user.click(screen.getByRole("button", { name: /apply/i }))
   await waitFor(() => expect(applySpy).toHaveBeenCalledTimes(2))
   expect(applySpy.mock.calls[1]).toEqual([PROJECT_ID, "d1", { applyUpdates: true, applyPrunes: true }])
+
+  // домен с шаблоном: записи зоны не нужны для диффа — запрос не должен уходить к провайдеру
+  expect(zoneRecordsSpy).not.toHaveBeenCalled()
+})
+
+test("пока список доменов грузится — показан общий лоадер, а не баннер об отсутствии шаблона", async () => {
+  let resolveListDomains: (domains: Domain[]) => void
+  vi.spyOn(api, "listDomains").mockReturnValue(
+    new Promise((resolve) => {
+      resolveListDomains = resolve
+    }),
+  )
+  const checkSpy = vi.spyOn(api, "checkDomain").mockResolvedValue({
+    updates: [], prunes: [], readOnly: [], inSyncCount: 0,
+  })
+  const zoneRecordsSpy = vi.spyOn(api, "zoneRecords")
+  renderPage()
+
+  expect(await screen.findByText(/загрузка/i)).toBeInTheDocument()
+  expect(screen.queryByText(/шаблон не привязан/i)).not.toBeInTheDocument()
+  expect(checkSpy).not.toHaveBeenCalled()
+  expect(zoneRecordsSpy).not.toHaveBeenCalled()
+
+  resolveListDomains!([domainWithTemplate])
+
+  expect(await screen.findByRole("button", { name: /apply/i })).toBeInTheDocument()
 })
 
 test("домен без шаблона показывает записи зоны и не вызывает check", async () => {