scrollbar 3

Session strata for the DeepSeek Harness Web GUI: the transcript's scrollbar becomes a to-scale, colour-coded map of the whole run — user messages emphasised, clickable anchors, auto-loading history, and a hover deck of every prompt in the session.

dsh Web UI 微调合集：宽表格越界修复、对话区左侧自绘滚动条、插件更新检查面板（不含 dsh 本体）

滚动钢琴：鼠标滑过 DSH 右侧边缘的滚动条竖条时，按纵向位置发出钢琴音（越高音越高，特雷门琴式）。