dsh-split-screen: Multi-Panel Workspace for DeepSeek Harness

`dsh-split-screen` is a browser-based plugin for DeepSeek Harness designed to reduce frequent view switching during multi-agent orchestration. It transforms the chat area into a multi-panel workspace enabled by default, supporting split-by-drag, resizing, and layout persistence to display multiple agent states in parallel. The plugin faithfully replicates DeepSeek’s native styling and supports features such as dark/light themes, streaming responses, inline approvals, and switching between full-screen and compact input modes. Users can create a new panel by dragging a sidebar conversation to the edge, use Alt+T to toggle input mode, or move focus with Alt+Shift+arrow keys. Installation requires administrator privileges and a service restart, and it requires Harness 0.1.5 or later.