dsh-chat-tune: Fine-Tuning DeepSeek Harness Web Chat Area Styling and Interactions

`dsh-chat-tune` is a Web interface customization plugin for DeepSeek Harness. It provides fine-grained appearance and interaction adjustments by overriding CSS variables and the Client layer, without modifying the core code. Features include text styles (font size, font family, line height, and paragraph spacing), layout width adjustments, and interaction options such as code blocks, input box following, and scroll pinning. Users can customize and save preferences in the settings panel. The plugin requires Node.js for development, and both installation and uninstallation are performed via the command line.