dsh-skin-nebula: Five Anime-Style Skins for DeepSeek Harness Web UI

`dsh-skin-nebula` is an anime-style skin plugin for the DeepSeek Harness (DSH) Web UI. It provides 5 sets of AI-generated HD themes (such as ninja, cherry blossoms, bamboo, etc.), supports light and dark modes, and allows opacity adjustment. Users can adjust it in real time via the switcher in the upper-right corner, and settings are saved automatically. After installation, the process must be restarted for the changes to take effect. Developed based on DSH 0.1.0-rc.6, it is suitable for users seeking a personalized visual experience.