dsh-tui-en: A Claude Code–Style Interactive Terminal Interface for DeepSeek Harness

`dsh-tui-en` is a terminal-native UI plugin for DeepSeek Harness that delivers a Claude Code-style interactive experience. It addresses the lack of visualized context management and streaming feedback in terminal interactions, enhancing Agent state monitoring through streaming Markdown, tool cards, timeline navigation, and full session workflows. The plugin does not modify the DSH core, supports long-session design, is currently in Public Beta, and is suitable for daily development use.