- Global :focus-visible fallback (@layer base): one accent outline for keyboard users on every
button/link/[role=button]/[role=tab]/summary that doesn't define its own. Non-input controls had no
visible keyboard focus app-wide; this closes the void with a single rule. More specific focus styles
(.selectable, an input's focus:ring, a menu item's data-active highlight) override it.
- PopoverItem now carries outline-hidden so menu items keep their data-active highlight without also
drawing the global outline (no double ring).
- Nav rail rows adopt .selectable (via rowBase); rail chrome buttons (logo/pin/about/sign-out) get a
focus-visible ring; the settings row already uses rowBase. Deduped the account trigger's selectable.
Deferred to R10: the chip/pill selected-PAINT unification (a .chip/.pill/.is-current repaint of the
~14 selection idioms) — the R10 token redefinition repaints those surfaces anyway, at less risk than a
hand migration now. R9's job (the focus/a11y foundation) is complete.
Verified: tsc/eslint/prettier/knip/vitest (79) green; browser computed-style confirms the global ring
renders (2px accent, offset 2px) on a plain button, .selectable overrides it with an inset ring, and
an outline-hidden menu button draws no global outline.