dsh-fate-twin-contract: Unofficial Fate-themed Skin for DeepSeek Harness

The DeepSeek Harness (DSH) plugin `dsh-fate-twin-contract` provides a Web GUI skin based on original Fate fan-made visuals, featuring Red A × Rin Tohsaka. The plugin runs entirely offline, does not modify data or configuration, supports light mode, dark mode, and system-following mode, and includes a responsive layout and accessibility features. It can be installed using the specified command, and the corresponding insertion record must be added to the configuration. The code is released under the MIT License, while the artwork assets are subject to separate terms.