dsh-composer-dynamic-island: An Upward-Expanding Control Island for Web Chat Interfaces

The DSH Web plugin `dsh-composer-dynamic-island` provides a compact upward-expanding island mode for collapsing cluttered plugin controls in the DSH Web chat interface. It keeps the interface tidy without moving DOM nodes or changing the React tree structure. It supports automatic control discovery, manual opt-in, and locally persisted configuration, and allows users to expand or pin the island via mouse hover or touch. The plugin declares that it makes no network requests and does not read sensitive data. It is suitable for scenarios where users want to simplify the interface and reduce visual clutter.