Refactoring

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Project	Deployment	Review	Updated (UTC)
react-form	Ready	Preview, Comment	Jan 5, 2026 6:06pm
react-markdown	Ready	Preview, Comment	Jan 5, 2026 6:06pm

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commit: fdcca07

[Copilot]

Pull request overview

This PR refactors multiple files across the codebase to improve code quality and maintainability. The changes include updating test assertions to use more concise Vitest matchers, converting mock functions to proper constructor functions, simplifying React components by removing unnecessary state management, and replacing mutations with immutable patterns.

Key changes:

• Converted arrow function mocks to constructor functions for proper class instantiation behavior
• Updated test assertions to use toHaveBeenCalledOnce() and toHaveBeenCalledExactlyOnceWith() for improved readability
• Refactored useTreeCollapse hook from useState to useReducer for better state management
• Simplified MarkdownViewer by removing unnecessary state management
• Replaced object mutation with immutable spread operator in SubmittedFields
• Added adoptedStyleSheets polyfill for jsdom compatibility

Reviewed changes

Copilot reviewed 13 out of 13 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
tests/setup.js	Added adoptedStyleSheets polyfill for jsdom environment to fix compatibility issue
packages/ui/src/_document.test.js	Converted ServerStyleSheet mock from arrow function to constructor function for proper instantiation
packages/ui/src/Notifications/NotificationMenu.test.jsx	Updated test assertion to use toHaveBeenCalledOnce()
packages/ui/src/Notifications/NotificationList.test.jsx	Updated test assertions to use toHaveBeenCalledOnce()
packages/ui/src/Markdown/Markdown.jsx	Removed unnecessary state management in MarkdownViewer, replaced Box with div, removed unused imports
packages/ui/src/GoToTopButton/GoToTopButton.test.jsx	Updated mock to constructor function and test assertions to use toHaveBeenCalledExactlyOnceWith()
packages/ui/src/FormField/FormField.test.js	Updated test assertion to use toHaveBeenCalledOnce()
packages/ui/src/FormField/FormField.jsx	Moved ref assignment after spread operator to prevent accidental override
packages/infra/src/logger/logger.test.js	Converted Axiom mock from arrow function to constructor function and hoisted flush mock
packages/infra/src/logger/axiom-transport.test.js	Converted Axiom mocks to constructor functions and updated test assertions
packages/hooks/src/useTreeCollapse/useTreeCollapse.js	Refactored from useState/useCallback to useReducer for cleaner state management
packages/helpers/src/dom.test.js	Updated test assertion to use toHaveBeenCalledOnce()
examples/form/components/SubmittedFields.jsx	Replaced delete mutation with immutable spread operator pattern

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