DSH Mobile Top Bar

The DeepSeek Harness plugin `dsh-mobile-topbar` is designed to address the issue of the collapsed mobile sidebar occupying grid column space. It takes effect on screens smaller than 768px: the sidebar is converted into a hidden drawer, the top bar gains a hamburger menu and a new creation button, the right panel becomes full-width, and the position of the settings modal is adjusted. To install it, run the required command and add it to the `bundles` field in `package.json`, then restart the profile to apply the changes. The plugin is compatible with DSH versions 0.1.5 through 0.2.0. Note the disabling behavior in 0.1.7 and the CSS implementation details.