ZilongYang/dsh-multiline-input

Single/multi-line composer toggle for the DSH Web GUI: an editable shortcut (registered through the harness shortcut service) — Cmd/Ctrl+E on desktop builds and Cmd/Ctrl+Shift+E in the browser, with Linux browsers unbound until you pick one — switches the composer between its native single-line shape and a four-line-plus draft area; a small tab on the composer shoulder always shows the current shortcut and target mode; while multi-line, Enter inserts a newline and Shift+Enter sends, and the mode is remembered per device.