Introducing the DeepSeek Harness UI Color Tone Plugin

`dsh-ui-tint` is a UI tinting plugin designed specifically for DeepSeek Harness (DSH), supporting both desktop and Web GUI. It enables lightweight interface customization through CSS injection, allowing users to independently adjust the color, opacity, and brightness of the sidebar, chat area, and dialog boxes. The plugin provides a rich set of presets, as well as "color depth" adjustment and automatic adaptation to light and dark themes to ensure font readability. All settings are persistently stored and automatically restored after a restart.