dsh-line-select

fengMax1997

行选区：浏览工作区文件、带行号预览代码、可视化选中行范围，一键把 `@path:start-end` 引用写入输入框，agent 发送时自动收到所选行原文，精准修改指定行。

Line-range selection: browse workspace files, preview code with line numbers, visually select a line range, and write a `@path:start-end` reference into the composer; the agent receives the exact selected lines on send.