dsh-session-nav: DeepSeek Harness Web GUI In-Session Navigation Bar

dsh-session-nav is an in-session navigation plugin for the DeepSeek Harness Web GUI, designed to address the high cost and frequent scrolling required to review specific conversations in long multi-turn sessions. Built on DSH's official dual-sided plugin mechanism, it does not intrude into the source code and is licensed under the MIT License. Its core function compresses each turn of dialogue into a navigation key: each key corresponds to a user message, with the model's reply integrated into the hover preview of that key (displaying up to 3 lines), thus centrally presenting user questions. The plugin supports hover preview, smooth click-to-jump, real-time highlighting synchronized with the current view, and can automatically invoke the official pagination API to load historical data and locate targets. Additionally, it supports adaptive dark and light themes and deduplicates messages via UUIDs. Installation requires Node.js >= 18, via `dsh plugin.