iframe 3

Multi-session split view for the DeepSeek Harness web GUI: the top window shadows the root slot with a resizable split container; each pane is an iframe running a full DSH client pinned to its own session, with per-pane title bars, LRU hibernation and a d

DSH teaching surface: project agent-generated self-contained HTML into a sandboxed in-session board with handwriting annotation and a built-in screenshot that returns to the conversation as a real user message. Ships its own usage skill (skills/stage-pane

DeepSeek Harness 侧边网页预览面板：本地静态托管、项目运行、元素标记批注、链接点击接管、对话框直接拖入文件、Markdown/代码/图片预览。