update v9

[gfazioli]

• *** 📦 build(deps): upgrade to Mantine v9, React 19, and modernize tooling**
• *** ♻️ refactor: update source code and tests for Mantine v9 and React 19 compatibility**
• *** ✨ feat(window): add withScrollArea, controlsPosition, and controlsOrder props**
• *** ✅ test(window): add tests and stories for withScrollArea, controlsPosition, and controlsOrder**

[Copilot]

Pull request overview

This PR upgrades the library and its tooling to Mantine v9 + React 19, while extending the Window component API with new header-controls options and optional internal scrolling.

Changes:

• Upgrade dependencies/tooling (Mantine v9, React 19, Yarn update, Storybook/CI/tooling modernization).
• Add withScrollArea, controlsPosition, and controlsOrder props to Window, plus docs/stories/tests.
• Refactor group/context and hooks to match Mantine v9 changes and reduce unnecessary rerenders.

Reviewed changes

Copilot reviewed 32 out of 36 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
tsconfig.json	Switch TS module resolution to bundler for modern tooling compatibility.
tsconfig.eslint.json	Remove ESLint-specific TS config (tooling migration).
tsconfig.build.json	Narrow build include to package/src and set rootDir for declarations.
README.md	Document Mantine 9 / React 19 requirement and new Window props.
package/src/WindowGroup.tsx	Memoize context value; adjust factory signature.
package/src/WindowGroup.context.ts	Replace Mantine optional context helper with React context.
package/src/Window.tsx	Implement withScrollArea, controlsPosition, controlsOrder in the header/content.
package/src/Window.test.tsx	Update persistence assertion; add tests for new props.
package/src/Window.story.tsx	Add stories demonstrating ScrollArea toggle and control placement/order.
package/src/lib/convert-to-pixels.test.ts	Add TS directive for SSR window deletion in tests.
package/src/hooks/use-window-state.ts	Add hook-deps lint suppressions with rationale.
package/src/hooks/use-window-drag.ts	Update window ref typing to allow null.
package/src/hooks/use-window-dimensions.ts	Replace Mantine useResizeObserver usage with manual ResizeObserver.
package/src/hooks/use-mantine-window.ts	Fix withinPortal defaulting; add hook-deps lint suppressions.
package/package.json	Update keywords to Mantine v9.
package.json	Update Yarn version, dependencies, and switch lint/format workflow to oxlint/oxfmt.
oxlint.config.ts	Introduce oxlint configuration and rule set.
eslint.config.mjs	Remove ESLint config (migration away from ESLint).
docs/tsconfig.json	Update TS target and moduleResolution to bundler.
docs/styles-api/Window.styles-api.ts	Document new data modifiers for styles API.
docs/package.json	Bump docs app dependencies to Mantine v9 / latest Next patch.
docs/docs.mdx	Add docs sections for ScrollArea toggle and controls positioning/order.
docs/demos/Window.demo.withScrollArea.tsx	Add demo for withScrollArea.
docs/demos/Window.demo.controlsPosition.tsx	Add demo for controlsPosition/controlsOrder.
docs/demos/Window.demo.configurator.tsx	Expose new props in the configurator demo.
docs/demos/index.ts	Export new demos.
CLAUDE.md	Update contributor docs for new tooling and new Window props.
.yarnrc.yml	Update Yarn release path.
.storybook/preview.tsx	Migrate theme switching to Storybook toolbar + Mantine forceColorScheme.
.storybook/main.ts	Update Storybook v10 config and addons.
.prettierrc.mjs	Remove Prettier config (formatting migration).
.oxfmtrc.json	Add oxfmt config including import ordering.
.github/workflows/pull_request.yml	Use .nvmrc for Node version and rename workflow.

Comments suppressed due to low confidence (1)

package/src/WindowGroup.tsx:67

• WindowGroupFactory declares a forwarded ref: HTMLDivElement, but the factory callback no longer accepts the ref parameter, and the rendered <Box> only receives ref={containerRef}. This makes ref on <Window.Group> a no-op (and is inconsistent with the Factory typing). Consider re-adding the ref param and merging it with containerRef, or remove the ref from the factory type if the component is intentionally not ref-forwarding.

export const WindowGroup = factory<WindowGroupFactory>((_props) => {
  const props = useProps('WindowGroup', defaultGroupProps, _props);
  const {
    id: groupId = 'window-group',
    withinPortal = false,
    showToolsButton = true,
    defaultLayout,
    groupRef,
    onLayoutChange,
    children,
    style,
    ...others
  } = props;