dsh-devpanel: DeepSeek Harness Terminal and AI Output Toolbox

`dsh-devpanel` is a browser console extension for DeepSeek Harness (DSH), designed to address limitations in terminal interaction and difficulties in file tracking. By mounting a Remote namespace, it provides DSH with a native terminal experience and visual workflow tracking capabilities. Core features include: 1) a **real PTY terminal** supporting multiple tabs, multi-process control, and incremental output; 2) an **AI output file sidebar** that tracks files written by the AI or generated by the Shell, with rendering support for multiple formats; and 3) a **dual-dimension statistics panel** integrating AI activity and terminal behavior data, supporting visualization and export. The extension adopts a client/host separated architecture, communicates via Typert Remote, and provides session-scoped directories and persistent statistics.