dsh-luna-theme: Apply Luna-Chat style to DSH's rendering interface

dsh-luna-theme provides a Luna-Chat style light/dark theme for the DSH desktop and web clients, bundled with ten sets of conversation backgrounds (PNG+H.264 MP4), a Luna balance widget, Asahi Live2D desktop pets, and voice-enabled splash animations. The plugin is a DSH bundle; after installation to the target profile, it loads upon restart. The four row IDs can be disabled individually, and the configuration is written in `cordis.patch.yml`. Background settings differentiate between draft and saved states; cycling, blur, mask, opacity, and `transitionMilliseconds` all have default values and constraints. The balance widget prioritizes the `DEEPSEEK_API_KEY`; if no key is available, it falls back to the logged-in account. The bubble remains visible during idle and peak hours. Desktop pet chat utilizes DSH's configured model and request authentication, does not write to the Session, and the theme does not register model tools. The code is MIT-licensed, and the assets are owned by Navel; this is a personal, non-commercial interface decoration. The plugin runs with DSH process permissions, and you should check the source code and license before installation.