3x-ui 式共享节点改造：nodes 状态机 + nodeClients 各自凭据

- 移除 VMess 协议
- VLESS/SS2022 按用户流量统计（AnyTLS 日志解析，SS 节点级）
- sing-box v2ray_api stats 支持
- 内存优化：面板 128M，agent 64M，sing-box 64M

scripts/agent-cert.sh

@@ -46,10 +46,8 @@ validate() {
 activate() {
   flush_usage
   if command -v systemctl >/dev/null && [[ -d /run/systemd/system ]]; then
-    systemctl try-restart nexusgate-xray.service || printf 'Xray 重启失败，请运行 ng-agent doctor\n' >&2
     systemctl try-restart nexusgate-sing-box.service || printf 'sing-box 重启失败，请运行 ng-agent doctor\n' >&2
   elif command -v rc-service >/dev/null; then
-    rc-service nexusgate-xray status >/dev/null 2>&1 && rc-service nexusgate-xray restart || true
     rc-service nexusgate-sing-box status >/dev/null 2>&1 && rc-service nexusgate-sing-box restart || true
   fi
   printf '证书已安装：%s；有效期：' "$target"
@@ -104,10 +102,8 @@ if [[ -r /etc/nexusgate/agent.env && -f /opt/nexusgate-agent/agent.js ]]; then
   fi
 fi
 if command -v systemctl >/dev/null && [[ -d /run/systemd/system ]]; then
-  systemctl try-restart nexusgate-xray.service
   systemctl try-restart nexusgate-sing-box.service
 elif command -v rc-service >/dev/null; then
-  rc-service nexusgate-xray status >/dev/null 2>&1 && rc-service nexusgate-xray restart || true
   rc-service nexusgate-sing-box status >/dev/null 2>&1 && rc-service nexusgate-sing-box restart || true
 fi
 EOF