feat(NetworkMapDashboard): add ping functionality for jumphost and home servers to enhance network connectivity checks

frontend/src/NetworkMapDashboard.jsx

@@ -89,6 +89,13 @@ export default function NetworkMapDashboard() {
       const from = String(c.from);
       const to = String(c.to);
       if (!from || !to || from === to) return;
+      const srcFrom = servers.find((s) => s.ip === from);
+      const srcTo = servers.find((s) => s.ip === to);
+      const canPingFrom = srcFrom && ['jumphost', 'home'].includes(String(srcFrom.type || '').toLowerCase());
+      const canPingTo = srcTo && ['jumphost', 'home'].includes(String(srcTo.type || '').toLowerCase());
+
+      // Пингуем только с jumphost/home, иначе бекенд возвращает E_PING (сервер не найден)
+      if (canPingFrom) {
       tasks.push(async () => {
         if (pingAbortRef.current) return;
         try {
@@ -103,6 +110,9 @@ export default function NetworkMapDashboard() {
           return { key: key(from, to), ms: null };
         }
       });
+      }
+
+      if (canPingTo) {
       tasks.push(async () => {
         if (pingAbortRef.current) return;
         try {
@@ -117,6 +127,7 @@ export default function NetworkMapDashboard() {
           return { key: key(to, from), ms: null };
         }
       });
+      }
     });
 
     const results = await runWithLimit(tasks, 4);