test(ui): проверить ожидание первого сообщения SSE

tests/e2e/traffic-live.spec.ts

@@ -1,7 +1,7 @@
 import { installOpenLiveStream, resumeLiveStream, sendLiveHeartbeat } from "./live-stream-fixture"
 import { test, expect } from '@playwright/test'
 
-for (const variant of ['closed', 'invalid', 'http-error', 'silent'] as const) {
+for (const variant of ['closed', 'invalid', 'http-error', 'silent', 'awaiting'] as const) {
   test(`Трафик: SSE ${variant} не выдаёт старое измерение за live`, async ({ page }) => {
     const server = { id: '1', name: 'Тестовый сервер', site: 'TEST', country: 'RU', status: 'online', rxNow: 2, txNow: 3, rxPeak: 5, txPeak: 6, rxTotal: 100, txTotal: 200, sessions: 1, rxSeries: [1, 2], txSeries: [2, 3] }
     await page.route('**/health', route => route.fulfill({ json: { ok: true } }))
@@ -23,12 +23,28 @@ for (const variant of ['closed', 'invalid', 'http-error', 'silent'] as const) {
         : path === '/api/servers' ? [] : {}
       return route.fulfill({ json })
     })
-    if (variant === 'silent') await installOpenLiveStream(page, '/api/traffic/servers/1/live', { rxMbps: 17, txMbps: 19, at: '2026-09-23T12:00:00Z' })
+    if (variant === 'silent' || variant === 'awaiting') await installOpenLiveStream(page, '/api/traffic/servers/1/live', { rxMbps: 17, txMbps: 19, at: '2026-09-23T12:00:00Z' }, variant !== 'awaiting')
     const received = new Date('2026-09-28T06:00:00Z')
     await page.clock.setFixedTime(received)
     await page.goto('/traffic')
     const summary = page.getByLabel('Скорость выбранного сервера')
     await expect(summary).toBeVisible()
+    if (variant === 'awaiting') {
+      const measurement = page.getByLabel('Последнее измерение сервера')
+      await expect(summary.getByText('История · ожидание live', { exact: true }).filter({ visible: true })).toHaveCount(2)
+      await expect(measurement).toHaveCount(0)
+      await expect(summary).not.toContainText('17.0')
+      await page.clock.fastForward(10_000)
+      await sendLiveHeartbeat(page)
+      await page.clock.fastForward(5_001)
+      await expect(summary.getByText('История · live недоступен', { exact: true }).filter({ visible: true })).toHaveCount(2)
+      await expect(measurement).toHaveCount(0)
+      await resumeLiveStream(page)
+      await expect(summary.getByText('live', { exact: true }).filter({ visible: true })).toHaveCount(2)
+      await expect(summary).toContainText('17.0')
+      await expect(measurement).toBeVisible()
+      return
+    }
     if (variant === 'silent') {
       await expect(summary.getByText('live', { exact: true }).filter({ visible: true })).toHaveCount(2)
       const stamp = await page.getByLabel('Последнее измерение сервера').locator('time').first().getAttribute('datetime')