Replace the hand-rolled @theme color block with a real shadcn init shape:
bare :root (light) + .dark (dark) tokens mapped to --color-* via
@theme inline, plus the missing semantic/chart/radius tokens. --accent
is now neutral (#262626) to match WorkClaw; the ~16 coral-via-accent
usages migrate to the dedicated `coral` brand token so they stay coral.
Adds cn() (clsx + tailwind-merge) and components.json so future
`npx shadcn add` works. Clawmates-specific tokens (coral brand,
marketing palette, measured shadows, motion, layout, type scale) are
preserved verbatim in a separate @theme block. Root <html> gains `dark`
(app/login read .dark; marketing stays light via explicit colors).
We do NOT add shadcn's Button/Card/etc. — they'd conflict with the
existing measured-to-WorkClaw components.
Verified value-preserving: typecheck/lint/86 unit/31 E2E all green, and
all 6 visual baselines pass with no diff. Compiled + live CSS confirm
bg-accent→#262626 (neutral), text-coral→#f96565, chart tokens present.
Co-Authored-By: Claude Opus 4.8 <[email protected]>
