Introducing the DeepSeek Harness Plugin: sz1698/dsh-bg-new

`sz1698/dsh-bg-new` is an open-source background customization plugin for DeepSeek Harness (DSH), released under the MIT License. It provides five modes (solid color, gradient, image, video, etc.) and a drawer-style UI through a local media server, and supports scaling/positioning, frosted-glass effects, and model instruction tools. All data is stored locally and never uploaded to the cloud, making it suitable for deeply customizing the DSH interface.