feat: the value's keys on the line below it: reveal and copy

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

internal/ui/app/app_test.go

@@ -204,7 +204,7 @@ func TestObjectTypeTabs(t *testing.T) {
 		t.Fatalf("selected = %q", s)
 	}
 	screen := d.screen()
-	for _, want := range []string{"key type   RSA 2048", "ops        sign, verify", "space to show public key"} {
+	for _, want := range []string{"key type   RSA 2048", "ops        sign, verify", "space to show the public key"} {
 		if !strings.Contains(screen, want) {
 			t.Errorf("missing %q:\n%s", want, screen)
 		}
@@ -979,7 +979,7 @@ func TestRebindingShowsEverywhere(t *testing.T) {
 	d := newDriverOpts(t, Options{Keys: &km})
 	d.keys("3")
 	scr := d.screen()
-	if !strings.Contains(scr, "(z to reveal)") || strings.Contains(scr, "space to reveal") {
+	if !strings.Contains(scr, "z to reveal") || strings.Contains(scr, "space to reveal") {
 		t.Errorf("detail hint doesn't follow the binding:\n%s", scr)
 	}
 	if !strings.Contains(lastLine(scr), "z reveal/hide") {