dsh-theme-ti: Apply TI6 Skin to DeepSeek Harness Web UI

# Introduction DSH's philosophy is that "everything is a plugin," but the appearance of the web interface has always been tied to the default theme. Changing color schemes typically requires modifying the frontend source code, which then necessitates maintaining a fork to keep up with upstream upgrades. `dsh-theme-ti` offers an alternative approach: as a client-side plugin, it overlays a complete set of tokens without modifying any original files. Coinciding with the Dota 2 The International season, the author has created a TI6-themed package featuring deep space blue-black, TI6 red ribbons, and Immortal Aegis gold, with vector wings and a starry sky background on the main panel. The following sections introduce what this plugin does, how to install it, and how to customize it on demand. # What is it `dsh-theme-ti` (package name: `@dsh-them