Install a Terminal Coding Interface for DeepSeek Harness with dsh-code

### 正式翻译（符合开源技术文档语境）： The dsh-code is a DeepSeek Harness interface enhancement plugin maintained by UNLINEARITY. It is stacked on the official dsh-base as an out-of-tree bundle, providing a terminal-based coding TUI with slash command completion, without needing to develop a separate Agent loop. This article conducts cross-verification against the community catalog page, GitHub README, MIT license, troubleshooting documentation, and the npm 0.9.0 package, covering installation commands, cli profile startup method, session and model operations, as well as precautions such as permissions, preview APIs, and Linux native modules.