dsh-visual-edit: Annotate and Compare Page Changes Directly in DSH Preview

`dsh-visual-edit` is a visual plugin for DeepSeek Harness (DSH) that addresses the lack of context in feedback for Agent code modifications. It allows users to directly annotate elements, arrows, or rectangles on the preview page and insert the feedback into the chat stream. Core features include three annotation modes, automatic comparison of before-and-after snapshots, locally stored notes, and batch processing. The plugin supports Vite and React development environments and can exclude privacy-sensitive elements. Installation requires DSH version 0.2.0-rc.2 and is performed via a desktop client command, significantly improving development efficiency and the accuracy of visual feedback.