docs(vps-xray): 定时重启配置说明；uninstall 清理 guard 与状态文件

vps-xray/uninstall.sh

@@ -84,10 +84,13 @@ fi
 systemctl disable xray 2>/dev/null || true
 
 # 每日重启 timer（旧版部署可能残留）
-if [ -f /etc/systemd/system/xray-restart.timer ]; then
+if [ -f /etc/systemd/system/xray-restart.timer ] \
+   || [ -f /usr/local/bin/xray-restart-guard ]; then
     systemctl disable --now xray-restart.timer 2>/dev/null || true
     rm -f /etc/systemd/system/xray-restart.timer \
-          /etc/systemd/system/xray-restart.service
+          /etc/systemd/system/xray-restart.service \
+          /usr/local/bin/xray-restart-guard \
+          /var/lib/xray/last-restart
     log "已移除每日重启 timer"
 fi