fix(ui): не подставлять выдуманный cost соседа OSPF

tests/e2e/ospf-states.spec.ts

@@ -9,6 +9,7 @@ test("OSPF и BFD: переходные и неизвестные состоян
  await page.getByRole("button", { name: "Соседи", exact: true }).click()
  const rows = page.locator("tr[data-row-id]")
  await expect(rows).toHaveCount(9)
+ for (const row of await rows.all()) await expect(row.locator("td").nth(5)).toHaveText("—")
  for(const state of ["Full", "2-Way", "ExStart", "Exchange", "Loading", "Attempt", "Init", "Down", "Неизвестно"]) await expect(rows.getByText(state, { exact: true })).toHaveCount(1)
  await page.getByRole("button", { name: "BFD", exact: true }).click()
  await expect(rows).toHaveCount(5)