update v9

[gfazioli]

• *** ⬆️ chore: upgrade to Mantine 9, React 19, TypeScript 6, and Storybook 10**
• 🎃 docs(demos): update Halloween countdown to 2026

[Copilot]

Pull request overview

This PR upgrades the project toolchain/dependencies to Mantine v9, React v19, TypeScript v6, and Storybook v10, and refreshes the docs demo countdown date.

Changes:

• Upgrade core UI/runtime/tooling dependencies (Mantine, React, TypeScript, Storybook) and update lockfile.
• Switch formatting from Prettier to oxfmt and adjust scripts/configuration accordingly.
• Update the Halloween countdown demo target date/title to 2026.

Reviewed changes

Copilot reviewed 15 out of 17 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
yarn.lock	Updates dependency resolutions for Mantine 9 / React 19 / TS 6 / Storybook 10 and related tooling.
tsconfig.json	Changes TS module resolution to bundler to align with modern bundler-based setups.
tsconfig.build.json	Narrows build inputs to package/src and sets rootDir for declaration output consistency.
README.md	Documents new version requirements (Mantine 9 / React 19).
package/src/ClockDigital.tsx	Updates Mantine factory usage, but currently drops ref forwarding.
package/src/Clock.tsx	Adjusts ref handling for React 19 “ref as prop” by extracting and merging refs.
package/package.json	Updates package keywords to reflect Mantine v9.
package.json	Replaces Prettier scripts/deps with oxfmt and bumps major dev tooling versions.
docs/tsconfig.json	Aligns docs TS target/module resolution with the upgraded toolchain.
docs/package.json	Upgrades docs dependencies to Mantine 9 and TypeScript 6.
docs/demos/useClockCountDown.demo.targetDates.tsx	Updates Halloween countdown to 2026.
CLAUDE.md	Updates contributor commands/docs for the new toolchain (oxfmt, Mantine 9) and removes local-path reference.
.storybook/preview.tsx	Reworks theme handling via globals + MantineProvider for Storybook 10.
.storybook/main.ts	Updates Storybook 10 config and addons list (currently drops addon-essentials).
.prettierrc.mjs	Removes the Prettier configuration (formatter migration).
.oxfmtrc.json	Adds oxfmt configuration (import ordering + formatting options).
.github/workflows/pull_request.yml	Uses .nvmrc for Node version selection and renames the workflow.

Comments suppressed due to low confidence (1)

package/src/ClockDigital.tsx:165

• ClockDigitalFactory still declares ref: HTMLDivElement, and there is a unit test that asserts the component forwards refs. The root <Box> no longer receives any ref, so ref.current will stay null and the ref-forwarding contract is broken. Extract ref from props (React 19 ref-as-prop) and pass it to the root Box, or remove the ref typing if refs are intentionally not supported.

  return (
    <>
      <ClockDigitalMediaVariables size={size} gap={gap} selector={`.${responsiveClassName}`} />
      <Box
        {...getStyles('root', { className: responsiveClassName })}
        role="timer"
        aria-label={`${clock.formattedHours}${separator}${clock.formattedMinutes}${showSeconds ? `${separator}${clock.formattedSeconds}` : ''}`}
        {...others}
      >

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