dsh-inapp-browser: In-App Browser Panel for DeepSeek Harness

dsh-inapp-browser is a client-side plugin specifically designed for DeepSeek Harness, intended to provide AI with convenient web interaction capabilities. It uses the Chrome DevTools Protocol to render an independent browser instance in the Better Sidebar, supporting end-to-end operations such as tab management, navigation, clicking and typing, screenshots, and snapshot retrieval. It addresses the low efficiency and fragmented context of traditional approaches, while providing a rich toolset for multi-tab management, popup handling, dragging, and keyboard simulation. Before use, specific Node.js and plugin version requirements must be met, and the usage rules for coordinate systems and key combinations must be observed.