v2.3.1

## ✨ New Features / 新增功能

* Agents: Added support for setting a maximum reply length for models in OpenClaw / OpenClaw 支持设置模型回复长度上限 by @zhengkunwang223 in https://github.com/1Panel-dev/1Panel/pull/13818
* Models: Added a Qwen3.8-Flash-Next model deployment template for dual RTX Pro 5000 GPUs / 新增适配双 RTX Pro 5000 显卡的 Qwen3.8-Flash-Next 模型部署模板 by @zhengkunwang223
* File Browser: Added support for using the filename provided by the server in remote downloads and improved error handling / 远程下载支持使用服务器提供的文件名并优化异常处理 by @lan-yonghui in https://github.com/1Panel-dev/1Panel/pull/13808
* Toolbox: Added panel main service diagnostics and performance data collection to process management / 进程管理新增面板主服务诊断与性能数据采集功能 by @ssongliu in https://github.com/1Panel-dev/1Panel/pull/13852

## ⚙️ Enhancements / 功能优化

* Containers: Improved container network forwarding checks and error messages / 完善容器网络转发检查与异常提示 by @ssongliu in https://github.com/1Panel-dev/1Panel/pull/13820
* Containers: Improved the theme display and text layout of container details / 优化容器详情的主题显示与文字排版 by @ssongliu in https://github.com/1Panel-dev/1Panel/pull/13849
* Firewall: Optimized the firewall startup, restart, and rule synchronization flows / 优化防火墙启动、重启及规则同步流程 by @ssongliu in https://github.com/1Panel-dev/1Panel/pull/13809
* Firewall: Optimized port whitelist management, rule recovery, and protection logic / 优化端口白名单管理及规则恢复与保护逻辑 by @ssongliu in https://github.com/1Panel-dev/1Panel/pull/13826
* Firewall: Improved loading and deletion speed for large rule sets and added support for queued background deletion / 提升大量规则的加载与删除速度并支持后台排队删除 by @ssongliu in https://github.com/1Panel-dev/1Panel/pull/13829

## 🛠️ Bug Fixes / 问题修复

* Websites: Fixed the issue where related settings could not be saved after enabling Brotli compression in OpenResty / 修复了 OpenResty 启用 Brotli 压缩后无法保存相关设置的问题 by @zhengkunwang223 in https://github.com/1Panel-dev/1Panel/pull/13822
* Terminal: Fixed interference between the terminal shortcut and terminal page sessions / 修复了终端快捷入口与终端页面会话相互干扰的问题 by @ssongliu in https://github.com/1Panel-dev/1Panel/pull/13810
* Virtual Machine Management: Fixed forced deletion failures when virtual machine names contain special characters / 修复了虚拟机名称包含特殊字符时无法强制删除的问题 by @ssongliu
* Panel Settings: Fixed excessive CPU usage when accessing the panel with a large authorized IP range / 修复了授权 IP 范围较大时访问面板导致 CPU 占用过高的问题 by @ssongliu in https://github.com/1Panel-dev/1Panel/pull/13851