fix(traffic): сохранять историю и показывать достоверную свежесть

components/reui-kit/traffic-mini-chart.tsx

@@ -1,14 +1,14 @@
 import { Fragment } from "react"
 
 /** Compact RX/TX history shared by traffic cards. Gaps remain gaps. */
-export function TrafficMiniChart({ rx, tx, height = 44 }: { rx: number[]; tx: number[]; height?: number }) {
-  const valid = (value: number) => Number.isFinite(value) && value >= 0
+export function TrafficMiniChart({ rx, tx, height = 44 }: { rx: (number|null)[]; tx: (number|null)[]; height?: number }) {
+  const valid = (value: number|null): value is number => value !== null && Number.isFinite(value) && value >= 0
   const values = [...rx, ...tx].filter(valid)
   if (!values.length) return <p className="text-xs text-muted-foreground">Нет истории трафика</p>
   const width = 300
   const count = Math.max(rx.length, tx.length)
   const max = Math.max(...values, 1) * 1.1
-  const segments = (series: number[]) => {
+  const segments = (series: (number|null)[]) => {
     const result: Array<Array<{ x: number; y: number }>> = []
     let current: Array<{ x: number; y: number }> = []
     series.forEach((value, index) => {