Summary

• Add radiogroup / radio semantics to Rate so screen readers can announce the score choices consistently.
• Add default keyboard support for Arrow keys, Home, and End, plus a keyboard prop to opt out.
• Cover click clear, keyboard movement, disabled behavior, and ARIA state in Vitest.
• Document Rate keyboard behavior and the new keyboard API.

Gap Notes

• Ant Design Rate exposes keyboard operation support and allow-clear behavior.
• WAI-ARIA's rating example models star ratings as a radio group with managed focus.
• Nova UI's Rate previously rendered independent buttons, so arrow-key rating changes and grouped selection semantics were missing.

Validation

• npm ci completed; npm reported existing audit findings (1 low, 4 moderate, 2 high) and Node 23 engine warnings for several packages.
• npm run lint:ui
• npm run typecheck:ui
• npm run test:ui (24 files, 74 tests)
• npm run build:ui
• npm run build (includes VitePress docs; emitted existing Browserslist/chunk-size warnings)