dsh-plugin-tui: A Claude Code-Style Terminal UI for DeepSeek Harness

`dsh-plugin-tui` is a client-side plugin for DeepSeek Harness, designed to provide a persistent, interactive terminal environment similar to Claude Code. The plugin supports streaming output, session management, model switching, and permission approval, addressing the limitation of traditional single-turn plugins in enabling multi-step collaboration. Users must install it by specifying the `tui` configuration file; the plugin requires only two bundle layers and does not support `dsh-headless`. Its core features include internal REPL commands (such as `/sessions` and `/model`) and real-time status feedback, though known considerations include one-time approval limitations and the need for token rendering optimization.