Speck 0.4.0

Find in the open view — ⌘F

A Tauri window has no find bar of its own, so Speck has one now. ⌘F searches
whichever view is in the main pane — a document, the project overview, or a
change's dashboard. Enter and ⇧Enter step through matches, ⌘G and ⇧⌘G do the
same from anywhere in the window, Esc closes.

Matches are painted rather than inserted into the page, which matters here: an
agent writing to the file you are reading re-renders it under you, and the
search re-runs against the text that replaced it without losing your place.

A new app icon

The step rail is gone; the icon now shows a document beside the artifacts that
follow it.