feat(NetworkConfigManager): add PTR zone display for servers; enhance interface with additional server information

frontend/src/NetworkConfigManager.jsx

@@ -568,7 +568,8 @@ function NetworkConfigManager() {
           interface: iface,
           interfaceName: iface.name || iface.id,
           server: server, // localIp привязан к serverId
-          serverName: server?.dns || server?.ip || iface.serverId || '—'
+          serverName: server?.dns || server?.ip || iface.serverId || '—',
+          ptrZone: server?.dns || '—' // PTR зона = доменное имя сервера
         });
       }
       if (iface.remoteIp && iface.remoteIp.trim()) {
@@ -579,7 +580,8 @@ function NetworkConfigManager() {
           interface: iface,
           interfaceName: iface.name || iface.id,
           server: server2, // remoteIp привязан к serverId2
-          serverName: server2?.dns || server2?.ip || iface.serverId2 || '—'
+          serverName: server2?.dns || server2?.ip || iface.serverId2 || '—',
+          ptrZone: server2?.dns || '—' // PTR зона = доменное имя сервера
         });
       }
     });
@@ -2072,6 +2074,7 @@ function NetworkConfigManager() {
                           <th>IP адрес</th>
                           <th>Тип</th>
                           <th>Сервер</th>
+                          <th>PTR зона</th>
                           <th>Интерфейс</th>
                           <th className="text-end">Действия</th>
                         </tr>
@@ -2100,6 +2103,9 @@ function NetworkConfigManager() {
                                 <span>{item.serverName}</span>
                               </div>
                             </td>
+                            <td>
+                              <code className="text-muted">{item.ptrZone}</code>
+                            </td>
                             <td>
                               <div className="d-flex align-items-center gap-2">
                                 <span>{item.interfaceName}</span>