fix: keep DNS and routing during seamless Xray switch on macOS

ipc/ipcserver.cpp

@@ -361,6 +361,9 @@ bool IpcServer::restoreResolvers()
     qDebug() << "IpcServer::restoreResolvers";
 #endif
 
+    if (m_xrayWorkers.size() > 1) {
+        return true;
+    }
     return Router::restoreResolvers();
 }
 
@@ -640,6 +643,9 @@ bool IpcServer::xrayRemoveUplinkRoutes(const QString& uplinkIface, const QString
     if (uplinkIface.isEmpty()) {
         return false;
     }
+    if (m_xrayWorkers.size() > 1) {
+        return true;
+    }
     return RouterMac::Instance().routeDeleteXray(uplinkIface, uplinkGateway);
 #else
     Q_UNUSED(uplinkIface)

service/server/router_mac.cpp

@@ -26,6 +26,8 @@ bool RouterMac::routeAdd(const QString &ipWithSubnet, const QString &gw)
         return false;
     }
 
+    routeDelete(ipWithSubnet, gw);
+
     QString cmd;
     if (mask == "255.255.255.255") {
         cmd = QString("route add -host %1 %2").arg(ip).arg(gw);