Replaces the right-anchored popover (which clips off the popup edge)
with an inline panel that injects into the form below the password row.
Trigger becomes a ✨ icon button (gold-bg). "save default" demoted to
secondary link; single gold "use" CTA. Bundles label-casing polish
(drop CAPS LOCK, gold required marker) since .label is shared.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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