dsh-session-html: Exporting DSH Sessions to Offline HTML

`dsh-session-html` is a DeepSeek Harness client plugin maintained by `quicksandznzn`, designed to export a complex Session tree—including subagents, context, tools, and media—into a single offline HTML file. The plugin can be used through interface buttons or the `/export-html` command, and draws inspiration from the export experience of the Pi project. After installation, the Web process must be restarted to load dependencies. It is released under the MIT license and is suitable for users who need to archive and share session records offline.