fix(ui): обновлять детали и пояснять модель карты сети

lib/map-gre-speed-probe.ts

@@ -16,6 +16,7 @@ export interface GreSpeedProbeSnapshot {
   dstInterface?: string
   lastTxAvgMbps?: number | null
   lastRxAvgMbps?: number | null
+  lastPingAt?: string | null
   lastPingRttMs?: number | null
 }
 

lib/network-map-layout.ts

@@ -826,8 +826,8 @@ export function buildGreMapEdges(
   }
 
   for (const t of tunnels) {
-    let a = servers.find((s) => s.id === t.serverId)
-    let b = findServerByGreRemote(servers, t.remoteAddress, resolvedIpv4ByHost)
+    const a = servers.find((s) => s.id === t.serverId)
+    const b = findServerByGreRemote(servers, t.remoteAddress, resolvedIpv4ByHost)
     if (!a || !b) continue
     if (a.id === b.id) continue