dsh-universal-palette: Global Floating Palette for DeepSeek Harness

The DSH Universal Palette plugin is designed to address the fragmentation of DSH functionality by providing keyboard-first users with a unified control entry point. It searches commands, models, sessions, and history in real time through the official API, offering a native look with a glassmorphic interface. Core features include a real-time command catalog, model navigation, session deduplication, and conversation hits. It supports a global floating palette via the Alt+Q shortcut and Composer search. The plugin adheres to public contract interoperability, does not alter the behavior of unverified features, and has no hard dependencies.