Agents workspace: roster, runs, and a readable run log; layout now eight workspaces

tui/frame.go

@@ -289,3 +289,12 @@ func helpOverlay(title string, entries [][2]string, w, h int) string {
 	p := panel{title: title, width: boxW, height: boxH, focused: true}
 	return lipgloss.Place(w, h, lipgloss.Center, lipgloss.Center, p.render(lines))
 }
+
+// short is the first eight characters of an identifier: enough to recognise a
+// run or a task in a column, never enough to confuse two of them on one screen.
+func short(id string) string {
+	if len(id) <= 8 {
+		return id
+	}
+	return id[:8]
+}