Add a `data-palette` theme axis (neutral ground) alongside mode + accent:
Warm (default), Slate, Graphite, Zinc — selectable in Settings > Appearance,
persisted per browser. Backward-compatible: `warm` needs no attribute so the
existing look is unchanged; accent (7 hues) and light/dark stay orthogonal.
Swap the UI font Inter -> Geist Variable + Geist Mono Variable (bundled offline).
Add the `.dash-*` cockpit styles finishing the redesigned Dashboard markup
already in tree (flat Today hero, KPI row, reminder queue, bento sections;
low-colour, red reserved for real failures).
packages/ui theme.ts/tokens.css/ThemeSwitcher.tsx are shared — restyles every
page. Typecheck clean; 410 tests pass.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>