中文是当前界面和文档的主要语言；英文 issue 和 pull request 同样欢迎。请注意，应用目前尚未提供英文 UI。
提交修改前请运行：
swift test
swift build请保持音频实时线程无阻塞、无磁盘与网络操作，并在改变音频算法、缓存策略或设备路由时补充测试。不要提交录音样本、用户诊断、签名凭据、更新私钥、证书、构建缓存或本机绝对路径。
Chinese is the primary UI and documentation language. English issues and pull requests are welcome, but the app itself is not yet localized into English. Run swift test and swift build before submitting changes, and never commit recordings, diagnostics, signing credentials, update private keys, certificates, build caches, or local absolute paths.