dsh-appearance: DeepSeek Harness Web Appearance Settings Plugin

levi52/dsh-appearance is an MIT-licensed DSH Web appearance settings plugin (v0.1.0) used to customize the interface style of DeepSeek Harness. Its core features include: providing Light, Dark, and Follow System modes, as well as 9 preset themes; supporting 8 preset accent colors and custom color picking, with automatic text contrast adaptation; allowing the selection of interface and code fonts, including system fonts and font size scaling; and supporting the upload or loading of background wallpapers via URL, with adjustable opacity and blur. Configuration management supports JSON export/import; settings are saved to `$DSH_HOME/settings.yaml` and use a draft mechanism that takes effect only after confirmation. Installation requires Node.js 18+, via `npm run install`.