- Modal: shared backdrop/panel with ESC-close, backdrop-click-close,
focus trap, body scroll lock; supports center + drawer-right variants,
matrix/violet accents, default/wide widths.
- EmptyState: icon + title + hint + optional CTA; compact variant
for tight rails.
- useEscapeKey, useFocusTrap: reusable hooks powering Modal; will also
be adopted by CommandPalette and ContextMenu in follow-up commits.
No retrofits yet — primitives only. tsc clean.
