shuaihaov/dsh-thewanderingearthii: DSH Web Movie-style Theme

The `dsh-theme-wandering-earth-2` Web GUI plugin for DSH Harness infuses the interface with the cinematic aesthetic of The Wandering Earth II. Mounted via a minimal configuration file, it leverages CSS variables and state bridging to deliver core features such as a planetary engine illustration anchored at the bottom with ignition-linked animation, a MOSS-styled send button, and a starfield HUD. Using a persistent overlay design, its color palette overrides any theme. It requires no complex build, takes effect after a restart, and delivers an immersive, cinematic visual experience.