dsh-doc-rail: DeepSeek Harness Right-Side Documentation Panel

dsh-doc-rail is a plugin for DeepSeek Harness that provides a right-side document display in Web GUI mode. It supports Markdown and plain text files, and features theme switching, window resizing, and automatic synchronized updates. The installation command is `dsh plugin --profile web add dsh-doc-rail`. It must run in Web GUI mode and requires Node.js >= 24. The plugin runs locally only, without network services. Settings are retained after a page refresh, but reconfiguration is required after restarting the process.