dsh-lego-plugin: DeepSeek Harness Dynamic Plugin Visualization Panel

`dsh-lego-plugin` is a client plugin that presents DeepSeek Harness (DSH) dynamic plugins as Lego blocks, intended to replace the basic native panel. It requires no external libraries, using CSS to render an ABS plastic texture and physical bevels, and supports hot-swapping. The plugin automatically assigns a 10-color palette and adaptive shapes based on plugin IDs, displaying a neon glow while running and distinct visual states when stopped or pending approval. It provides synthesized sound effects and a shake-to-change-color interaction, and supports Chinese/English internationalization along with light/dark themes. This plugin manages only `dyn/*` dynamic plugins, and the native panel is automatically restored after uninstallation.