fix(ui): отличать неизвестные flow-метрики от нулевых

components/traffic/flow-analytics-panel.tsx

@@ -25,6 +25,10 @@ import { Flag } from "@/components/flag"
 import { fmtRate } from "@/lib/fmt-rate"
 import { cn } from "@/lib/utils"
 
+function hasMeasurement(value: number | undefined): value is number {
+  return typeof value === "number" && Number.isFinite(value) && value >= 0
+}
+
 function formatBytes(n: number): string {
   if (n >= 1_000_000_000) return `${(n / 1_000_000_000).toFixed(2)} ГБ`
   if (n >= 1_000_000) return `${(n / 1_000_000).toFixed(1)} МБ`
@@ -513,15 +517,15 @@ export function FlowAnalyticsDetail({
             {
               id: "overlay",
               label: "JH↔EN overlay",
-              value: fmtRate((analytics?.bpsOverlay ?? 0) / 1_000_000),
-              hint: analytics?.bytesOverlay ? formatBytes(analytics.bytesOverlay) : undefined,
+              value: hasMeasurement(analytics?.bpsOverlay) ? fmtRate(analytics.bpsOverlay / 1_000_000) : "Нет данных",
+              hint: hasMeasurement(analytics?.bytesOverlay) ? formatBytes(analytics.bytesOverlay) : undefined,
               icon: <ShieldIcon className="size-4" />,
               iconClassName: "text-warning",
             },
             {
               id: "wire",
               label: "Wire GRE",
-              value: fmtRate((analytics?.bpsWire ?? 0) / 1_000_000),
+              value: hasMeasurement(analytics?.bpsWire) ? fmtRate(analytics.bpsWire / 1_000_000) : "Нет данных",
               hint: "счётчик iface",
               icon: <RouteIcon className="size-4" />,
               iconClassName: "text-primary",
@@ -530,7 +534,7 @@ export function FlowAnalyticsDetail({
               ? [{
                   id: "mesh",
                   label: "Mesh",
-                  value: formatBytes(analytics?.bytesMesh ?? 0),
+                  value: hasMeasurement(analytics?.bytesMesh) ? formatBytes(analytics.bytesMesh) : "Нет данных",
                   hint: "клиент↔клиент",
                   icon: <NetworkIcon className="size-4" />,
                   iconClassName: "text-muted-foreground",