dsh-whale-particles: Whale Particle Background

`dsh-whale-particles` is a fun web plugin that runs in the DeepSeek Harness web interface and provides an interactive dot background. It supports a whale silhouette or custom transparent photo outlines, with manual interaction and automatic screensaver modes. The plugin stores its configuration and mask data in the browser's local storage and automatically adapts to the UI. It can be installed via CLI or manual copy, and a restart is required after upgrading.