@wangjunjian/dsh-artifact-viewer: DeepSeek Harness Artifact Sidebar and Bookmarking Plugin

`dsh-artifact-viewer` is a DeepSeek Harness plugin designed to address the difficulty of locating scattered tool-generated artifacts in conversations. It displays files and images in a right-side overlay panel and provides a persistent bookmarking feature. The plugin supports intercepting links to preview multiple formats, including code highlighting and Mermaid diagrams, and allows bookmark navigation back to the original session. Open-source and easy to install and configure, it delivers a convenient artifact management experience for developers.