fix(ui): показывать время получения аналитики потоков

components/traffic/traffic-data-time.tsx

@@ -0,0 +1,15 @@
+/** Receipt time is not the timestamp of a network measurement. */
+export function TrafficDataTime({ label, receivedAt, source }: {
+  label: string
+  receivedAt?: number | null
+  source: "API" | "live-поток"
+}) {
+  if (receivedAt == null || !Number.isFinite(receivedAt)) return null
+  const date = new Date(receivedAt)
+  return (
+    <p aria-label={label} className="text-xs text-muted-foreground mb-3 break-words">
+      Получено ({source}): <time dateTime={date.toISOString()}>{date.toLocaleString("ru-RU")}</time>
+      {" · время измерения не предоставлено"}
+    </p>
+  )
+}