feat(joint-react): sync with @joint/react-plus + general updates

[samuelgja]

Description

This PR refactors joint-react (and related packages) to simplify the architecture and prepare for @joint/plus-react integration.
The main changes include the removal of PaperProvider, the introduction of controlled mode in GraphProvider, and multiple performance optimizations.

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🚩 Major Changes

1. Controlled Mode in GraphProvider

• Added support for controlled and uncontrolled operation:
  • Uncontrolled (default): behaves as before — dia.Graph remains the source of truth.
  • Controlled: when onElementsChange / onLinksChange props are provided, React state becomes the source of truth.
    Enables integration with Redux, Zustand, or useState.

2. PaperProvider Removal

• The PaperProvider layer has been completely removed.
  All paper-related methods and refs are now accessible via the new imperative API exposed on the component ref.
  This simplifies the render tree and eliminates redundant provider nesting.

3. API Changes

• Renamed:
  • initialElements → elements
  • initialLinks → links
• Removed internal Map-based caching; now uses plain arrays for better iteration performance.
• Introduced new useImperativeApi hook for managing refs and access to paper/graph internals.

4. Store & Performance

• Simplified internal store representation (no deep proxy layers).
• Optimized use-element-views and render paths.
• Reduced re-renders caused by context dependency changes.

5. Developer Experience

• Improved integration with Storybook examples (controlled graph stories).
• Adjusted tests for controlled mode and ref-based API.
• Updated dependencies (eslint, @types/react, typescript, etc.) and peer dependency ranges.

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Motivation and Context

This refactor simplifies both the runtime and mental model:

• Less boilerplate: No extra providers for Paper or Graph access.
• More flexible control: Graphs can now be managed by React state or remain internal.
• Better performance: Leaner store and direct ref access reduce indirection.
• Future-ready: Enables seamless migration toward the new @joint/plus-react ecosystem.

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Screenshots

N/A — internal behavioral changes only.

[Copilot]

Pull Request Overview

This PR refactors the joint-react package to align with @joint/react-plus by simplifying the architecture and introducing controlled mode. The main changes include removing PaperProvider, adding controlled/uncontrolled modes to GraphProvider, and implementing performance optimizations.

Key changes:

• Removed PaperProvider in favor of imperative API exposed on component refs
• Added controlled mode support with onElementsChange/onLinksChange props
• Renamed initialElements/initialLinks to elements/links for consistency

Reviewed Changes

Copilot reviewed 209 out of 211 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
packages/joint-vitest-plugin-mock-svg/package.json	Updated React/TypeScript dependencies to exact versions
packages/joint-react/vite.config.ts	Removed eslint disable comment, added @ts-expect-error
packages/joint-react/tsconfig.json	Modernized TypeScript config with bundler resolution
packages/joint-react/src/utils/*	Major refactoring of utilities including new scheduler, object utilities
packages/joint-react/src/hooks/*	Replaced useUpdateElement with useCellActions, updated store hooks
packages/joint-react/src/components/*	Updated to use new prop names and imperative API

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