Verbatim port of the handoff primitives into components/ui/ — Icon,
Button, IconButton, Badge, Tag, Card, Tabs (core); Input, Select,
Checkbox, Radio, Switch (forms); Dialog, Toast, Tooltip (feedback).
Each keeps its injected token-referencing CSS byte-for-byte; the
handoff .d.ts contracts become the exported prop interfaces. Barrel at
components/ui/index.ts.
Adds a PrimitivesGallery (app root for now; real shell is P3-2) that
exercises every primitive with a light/dark toggle. Smoke suite asserts
the gallery, section coverage, theme flip, and dialog open/Escape;
screenshots captured for both themes. typecheck + 5 e2e green.
Closes P3-1.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
