chore: prepare WIP draft to upgrade React to 17.0.2

[bosun-ai]

Summary

This is a work-in-progress draft PR to upgrade React from 3.1.15 to 17.0.2. No code changes have been committed yet; this PR is prepared to outline scope and considerations before implementation.

Scope

• Plan to bump React and related packages to React 17.0.2.
• Align Node version via .nvmrc to ensure consistent local development (observed .nvmrc set to 12).
• Identify and update peer dependencies and tooling that may be impacted (react-dom, testing utilities, eslint plugins, flow types, etc.).

Reasoning

• Modernize the React version to benefit from improvements and long-term support.
• Prepare the codebase for future maintenance and compatibility with newer libraries.

Impact/Risks

• Potential breaking changes from current React version to 17.0.2, including updates required in ReactDOM rendering, lifecycle methods, and deprecated patterns.
• Tooling updates may be required (babel, eslint-plugin-react, flow-typed definitions, react-scripts or build config) to maintain compatibility.
• Integration tests and end-to-end tests may need updates.

Status

• No changes have been made yet; this PR is an empty placeholder to coordinate the upgrade.

Follow-ups / Open Questions

• Verify current installed React version(s) across package.json files and determine a migration path.
• Confirm required updates to react-dom, @types/react or flow-typed, and any third-party React libraries.
• Decide on Node and npm/yarn versions for CI and local dev during the upgrade.
• Plan a phased rollout with feature flags if needed.

Reviewer Action Items

• Confirm the upgrade target and scope (React 17.0.2 and applicable companion packages).
• Provide guidance on CI/runtime Node version alignment.
• Identify critical areas of the app likely impacted by the upgrade.
• Approve proceeding with implementation steps in subsequent commits.

Notes

• This is a test PR and should not be merged.
• This PR will be updated as work progresses.

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This pull request is created by bosun, a code maintenance automation platform. For more information, visit bosun.ai.