dsh-web-preview-panel: DeepSeek Harness Side Web Preview Panel

dsh-web-preview-panel is a sidebar preview plugin for the DeepSeek Harness (DSH) Web version, designed to address the pain points developers face in AI collaboration when viewing code, running projects, and interacting with context. The plugin hosts workspace static resources via DSH's own HTTP service, providing Markdown rendering, code with line numbers, image display, and HTML preview capabilities. Core features include automatically detecting and running Cargo, Node.js, Go, and Python projects, with support for real-time log scrolling and AI diagnostics; offering an element markup mode that allows selecting page elements and adding annotations to the conversation; supporting the direct drag-and-drop of files into the chat dialog to add them to drafts as path references; and link interception to support opening various file paths in the sidebar. The plugin features session isolation.