Install a Built-in Capability Checker for DeepSeek Harness Web with dsh-builtin-toggles

### 翻译结果（专业技术译法，符合开源项目文档表达习惯）： `dsh-builtin-toggles` is an unofficial DSH Web plugin maintained by Starfie1d1272, currently at version 0.3.2 on npm and licensed under MIT. It turns the built-in capabilities of the Web Loader into evidence-backed inspectors, and only allows modifying 9 reviewed interface toggles. This article verifies the installation command, settings entry, fail-closed boundary and rc.6 review baseline in accordance with the community directory, GitHub README and Inspection API.