dsh-chattree: Turning Linear Chat History into an Interactive Conversation Map

`dsh-chattree` is a DeepSeek Harness plugin that transforms linear conversations into a visual tree map. It supports branching prompts, node archiving, drag-to-zoom, and context compression, addressing the difficulty of locating context and managing branches in long conversations. This plugin has zero runtime dependencies and is suitable for users with long, multi-branch conversations.