Motivation

• Provide a drop-in Radix Themes-based theme for PUI by vending Radix token sources and converting them to PUI CSS custom properties.
• Enable deterministic light/dark token output (HSL triplets) so PUI components can be themed purely with CSS variables.
• Port a minimal set of Radix-styled components (button, input, dialog) to validate the token pipeline and selector mapping approach.

Description

• Added a new package @pui/theme-radix with a PostCSS build pipeline and a Node generator src/build/gen-tokens.mjs that bundles vendored Radix token CSS and emits src/generated/tokens.css in PUI HSL triplet form.
• Included an explicit token mapping file at src/build/token-map.json and a small vendored subset of Radix token sources under src/radix-src/tokens/* plus breakpoints.css.
• Ported Radix-styled component CSS to PUI attribute selectors at src/components/{button.css,input.css,dialog.css} and added src/index.css to stitch generated tokens with the component styles.
• Added package.json scripts for build:tokens, build:css, and build, and updated workspace config to include the new package.

Testing

• Installed workspace dependencies with pnpm install which completed successfully.
• Executed the token generation with pnpm --filter @pui/theme-radix run build:tokens and the generator produced src/generated/tokens.css without errors.
• Verified the generated token blocks include both :root and .dark outputs and that initial component CSS files import the generated tokens.

Codex Task