DeepSeek Harness Plugin: dsh-chat-toc — Enhanced Chat Navigation and Outline

dsh-chat-toc is a navigation and outline enhancement plugin designed specifically for the DeepSeek Harness (DSH) web interface. 100% integrated with the native Turn Rail and without redundant tracks, it provides core features including hover card previews, favorites filtering, code capsule filtering, and Markdown export. The plugin incorporates a 300ms debounce mechanism for stable interactions and supports multiple themes and persistent storage. With no additional configuration required, it enables developers to quickly locate key information and history within long conversations, improving efficiency when reviewing and archiving long chat sessions.