dsh-right-dock: DeepSeek Harness Web Right Sidebar Platform

`dsh-right-dock` is a right sidebar platform plugin for DeepSeek Harness, providing container-level entry points and a push layout. The plugin uses a persistent right-edge Rail as the entry point; opening the Dock pushes the chat area to the left and automatically switches to an overlay on narrow screens. It supports multi-tab mounting, allowing other plugins to register tabs via agents. **Note: this plugin was marked as deprecated on 2026-09-11**; DSH 0.1.5 has refactored the sidebar system, and new projects are recommended to use the official `rightbar` slot.