DeepSeek Harness Plugin: dsh-tvision

`dsh-tvision` is a Turbo Vision-style TUI window manager designed for DeepSeek Harness agents. It addresses the interaction limitations of a single terminal window in complex scenarios by providing overlapping windows, controls, a skin system, and mouse support. The plugin is easy to install, supports local demos, multi-session management, and API configuration, and is licensed under the MIT license.