DeepSeek Harness (DSH) SketchUp Plugin Introduction

`dsh-sketchup` is a plugin for SketchUp 2024 designed to address compatibility issues with SketchUp’s embedded browser, enabling it to serve as a local host for DeepSeek Harness (DSH). The plugin includes a Ruby extension and a DSH Host, establishes communication over WebSocket, and provides the necessary shims for standard JavaScript APIs. It supports structured operations such as reading model information and creating geometry, as well as opening an authenticated chat interface. The plugin is currently a prerelease for Windows + SketchUp 2024 (v0.1.0-alpha.1) and offers three installation methods. When using it, attention should be paid to permission security, network disconnection handling, and platform compatibility limitations.