docs(README): add Arch Linux installation instructions for NyaTerm

- Included installation steps for Arch Linux users via AUR.
- Provided commands for both yay and paru package managers.
- Added instructions for manual installation from the AUR repository.
- Updated both English and Chinese README files to reflect these changes.

README.md

@@ -255,6 +255,33 @@ Download the latest build for your platform from [nyaterm.app](https://nyaterm.a
 
 For the Windows portable edition, extract the zip and run `NyaTerm.exe`. Portable updates are manual: download the new portable zip, close NyaTerm, replace the program files, and keep the `data/` folder.
 
+### Arch Linux / AUR
+
+Arch Linux users can install NyaTerm from the AUR:
+
+```bash
+yay -S nyaterm-bin
+```
+
+Or with `paru`:
+
+```bash
+paru -S nyaterm-bin
+```
+
+You can also build it manually from the AUR repository:
+
+```bash
+git clone https://aur.archlinux.org/nyaterm-bin.git
+cd nyaterm-bin
+makepkg -si
+```
+
+AUR package: [`nyaterm-bin`](https://aur.archlinux.org/packages/nyaterm-bin)
+
+> `nyaterm-bin` is a community-maintained binary AUR package. If the AUR package has not yet caught up with the latest release, download the official package from [Releases](https://github.com/nyakang/nyaterm/releases).
+
+
 ## Prerequisites for Development
 
 - Node.js 18+

README.zh-CN.md

@@ -256,6 +256,33 @@ NyaTerm 适合每天在服务器、本地命令、设备调试和配置文件之
 
 Windows 便携版解压后运行 `NyaTerm.exe` 即可。便携版更新需要手动完成：下载新的便携版 zip，关闭 NyaTerm，替换程序文件，并保留 `data/` 目录。
 
+### Arch Linux / AUR
+
+Arch Linux 用户可以通过 AUR 安装 NyaTerm：
+
+```bash
+yay -S nyaterm-bin
+```
+
+或使用 `paru`：
+
+```bash
+paru -S nyaterm-bin
+```
+
+也可以手动从 AUR 构建安装：
+
+```bash
+git clone https://aur.archlinux.org/nyaterm-bin.git
+cd nyaterm-bin
+makepkg -si
+```
+
+AUR 软件包：[`nyaterm-bin`](https://aur.archlinux.org/packages/nyaterm-bin)
+
+> `nyaterm-bin` 为社区维护的 AUR 二进制包。如果 AUR 版本暂未同步到最新发布版，可以从 [Releases](https://github.com/nyakang/nyaterm/releases) 下载官方安装包。
+
+
 ## 开发环境要求
 
 - Node.js 18+