The popover (which clipped off the popup edge) becomes an inline panel
that mounts inside the form (login.ts) or settings section
(settings-vault.ts). Trigger button is ✨ with aria-expanded toggling.
Action row varies by context: fill-field has cancel+use; configure-
defaults has only the save-default link. Escape key closes the panel.
Tests adapted to new API; 3 new tests for aria-expanded, auto-generate,
and Escape behavior.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
ac15f060e9