Help screen: wrap descriptions under themselves, size to the terminal

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

internal/ui/app.go

@@ -391,6 +391,11 @@ func (a *App) pushOverlay(p, focus tview.Primitive, hints string, full bool, onC
 
 // openModal shows p centered above the current view.
 func (a *App) openModal(p tview.Primitive, width, height int) {
+	a.openModalHints(p, width, height, "↑↓ move · ←→ change · Enter select · Esc cancel")
+}
+
+// openModalHints is openModal with its own status bar hints.
+func (a *App) openModalHints(p tview.Primitive, width, height int, hints string) {
 	box := tview.NewFlex().
 		AddItem(nil, 0, 1, false).
 		AddItem(tview.NewFlex().SetDirection(tview.FlexRow).
@@ -398,7 +403,7 @@ func (a *App) openModal(p tview.Primitive, width, height int) {
 			AddItem(p, height, 0, true).
 			AddItem(nil, 0, 1, false), width, 0, true).
 		AddItem(nil, 0, 1, false)
-	a.pushOverlay(box, p, "↑↓ move · ←→ change · Enter select · Esc cancel", false, nil)
+	a.pushOverlay(box, p, hints, false, nil)
 }
 
 // openSidePanel shows p at the top right so most of the view behind it stays