fix: append screen bindings to global shortcuts in footer

Screens with KeyBindings() (e.g. Settings) now show global shortcuts
plus their own hints, instead of replacing globals. Screens with
FooterBindings() (Connect) still fully control the footer.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: gitcoder89431

internal/app/view.go

@@ -27,9 +27,11 @@ func (m Model) View() tea.View {
 	footBindings := m.keys.ShortHelp()
 	type footerBinder interface{ FooterBindings() []key.Binding }
 	if fb, ok := active.(footerBinder); ok {
+		// screen fully controls the footer (e.g. Connect)
 		footBindings = fb.FooterBindings()
 	} else if screenBindings := active.KeyBindings(); len(screenBindings) > 0 {
-		footBindings = screenBindings
+		// append screen-specific hints after global shortcuts
+		footBindings = append(m.keys.ShortHelp(), screenBindings...)
 	}
 	foot := footer.View(footBindings, dims.Footer.Width, dims.Footer.Height, m.theme)
 	mainFrameWidth, mainFrameHeight := m.theme.Main.GetFrameSize()