dsh-workshop: Adding a Local Plugin Store to the DSH Web UI

dsh-workshop is a Steam-style plugin marketplace integrated into the DeepSeek Harness Web UI, designed to address the issues of scattered community plugins, inconsistent installation sources, and unstable GitHub access. It provides a "Workshop" entry in the sidebar, offering browsing of 850+ plugins, category filtering, and bilingual descriptions in both Chinese and English. Core capabilities include one-click installation with npm as the primary source and automatic fallback to GitHub sources, built-in mirror speed testing across 7 mirrors to accelerate downloads, and safety mechanisms such as a TUI plugin blacklist, installation pre-checks, artifact verification, and automatic rollback. Additionally, it supports unified management and updates for installed plugins. Users require a Node.js 18.17+ environment and can use the tool by adding plugins via the command line and restarting the service. This tool is positioned as a local development aid, providing basic security