DeepSeek Harness Plugin: dsh-skin-glass Frosted Glass Theme

`dsh-skin-glass` is a playful skin plugin for DeepSeek Harness, designed to address web interface customization issues. It automatically generates light and dark mode design tokens by extracting wallpaper colors, and uses `backdrop-filter` to implement component-level frosted glass effects, even generating gradient backgrounds when no wallpaper is set. The plugin also ensures text contrast. Users can install it via CLI to transform the web interface into a modern frosted, textured style.