fix(ui): очищать недоступные интерфейсы при загрузке

tests/e2e/uptime-links.spec.ts

@@ -663,3 +663,28 @@ test('Смена режима через настройки: поздняя ош
   await expect(page.getByText('Ошибка старого live-подключения', { exact: true })).toHaveCount(0)
   await expect(page.getByRole('button', { name: 'Новая проба', exact: true })).toBeEnabled()
 })
+
+for (const active of [false, true]) test(`Speed interfaces: загрузка и повторное открытие, active=${active}`, async ({ page }) => {
+  await setup(page, "/uptime?tab=speed", 0, false, "mm:uptime:write")
+  const probe = { id: "s1", srcServerId: "1", dstServerId: "2", srcInterface: "ether1", dstInterface: "ether1", protocol: "tcp", direction: "both", durationSec: "10", enabled: true, lastRunAt: null, lastTxAvgMbps: null, lastRxAvgMbps: null, lastStatus: null, lastError: null, lastPingRttMs: null, lastPingLossPct: null, lastPingAt: null, lastPingError: null }
+  const bodies: { probes: Record<string, unknown>[] }[] = []
+  let interfaceCalls = 0
+  await page.route("**/api/uptime/speed-probes", route => {
+    if (route.request().method() === "PUT") { bodies.push(route.request().postDataJSON()); return route.fulfill({ json: { ok: true } }) }
+    return route.fulfill({ json: { probes: [probe] } })
+  })
+  await page.route("**/api/uptime/speed-test/endpoints/*/interfaces", route => { interfaceCalls++; return route.fulfill({ json: { interfaces: [{ name: "ether1", running: active, disabled: !active, addresses: ["192.0.2.1/24"] }] } }) })
+  await page.reload()
+  await page.getByRole("button", { name: "Пауза", exact: true }).click()
+  for (let attempt = 0; attempt < 2; attempt++) {
+    await page.getByRole("button", { name: "Редактировать speed-пробу", exact: true }).click()
+    await expect.poll(() => interfaceCalls).toBe(2)
+    const dialog = page.getByRole("dialog")
+    await expect(dialog).toBeVisible()
+    await dialog.getByRole("button", { name: "Сохранить", exact: true }).click()
+    await expect(dialog).toBeHidden()
+    expect(bodies[attempt].probes[0].srcInterface).toBe(active ? "ether1" : "")
+    expect(bodies[attempt].probes[0].dstInterface).toBe(active ? "ether1" : "")
+  }
+  expect(interfaceCalls).toBe(2)
+})