dsh-codex-timeline: Turn-based Navigation and Local Search for Long DSH Web Sessions

dsh-codex-timeline is a long-session assistance plugin designed specifically for DeepSeek Harness Web (DSH), aimed at addressing the difficulty of backtracking user inputs in extended conversations. By providing a Codex-style navigation track for conversation turns and local session search functionality, this plugin helps users efficiently locate historical content without altering the model's responses. Core features include a user turn navigation track displayed on the left or right side, supporting previews, click-based navigation, and keyboard operations; local keyword search covering the complete persistent session log, ensuring that search content is not sent to the model or third parties; and fine-grained scroll control, such as step-by-step scrolling with the mouse wheel and boundary handling. The plugin is compatible with DSH 0.1.1-rc.2 and requires Node.js ^22.19.0 or >=24.0.0. Users can install it via npm or scripts.