dsh-client-ui-mobile-adapt: Mobile Adaptation Plugin for DeepSeek Harness Web GUI

`dsh-client-ui-mobile-adapt` is a mobile-adaptation plugin for DeepSeek Harness Web GUI, developed by Hotsteel2901 under the MIT license. This client-side-only plugin is designed to address the issue of desktop layouts being unsuitable for narrow screens. It only activates within viewports with `max-width: 768px`, leaving the desktop layout unaffected. Core features include collapsing a three-column layout into a single column, converting the sidebar into a drawer, making the settings panel fullscreen, and providing a floating window for trajectory details. It also includes optimizations for iOS dynamic viewports and safe areas. For installation, it is recommended to add the plugin via an HTTPS tarball URL to a specified profile, manually mount it through `cordis.patch.yml`, or create a dedicated profile.