dsh-audio-visualizer: System Audio-Driven Real-Time Spectrum and Bass Glow

`dsh-audio-visualizer` is a system audio-driven UI visualization plugin designed specifically for DeepSeek Harness (DSH). Its core features include a floating component that renders a 48-color rainbow spectrum in real time, and a window border glow effect that changes with the bass. The plugin uses the Web Audio API for in-memory FFT analysis, ensuring privacy and security by not storing any audio data. After installation, system audio must be manually authorized in the web version, while the desktop version requires running a patch script. This plugin is compatible with macOS 14.2+ and DSH Desktop 2.0.5+, and aims to enhance the application's visual experience through a lightweight solution.