highlight 4

Answer annotation and highlighting plugin for DSH Web

DSH 提问块高亮：把对话里已答复的「提问 n/n 已回答」工具块用柔和卡片样式凸显（浅品牌色底 + 圆角）。

Restore syntax highlighting of read/write tool envelopes inside run_code (PTC / Code Mode) result cards

Chain-of-thought keyword counting and highlighting: per-word count chips with a click-to-suppress switch, per-word colour, text colour and text size, whole-word matching, and a dedicated settings section