[DT-1090] Upgrade to React 19

[kevinmarete]

Addresses

https://broadworkbench.atlassian.net/browse/DT-1090

Summary

This PR bumps react, react-dom, @types/react, and @types/react-dom from 18.3.1 to 19.x.
### Why All dependencies (MUI, react-select, react-modal, react-query, testing-library, etc.) already support React 19 in their peer ranges, and a compatibility scan found no usage of APIs removed in v19 (legacy ReactDOM.render, string refs, defaultProps/propTypes, legacy context, etc.).

Verification

• ✅ tsc --noEmit (client + server) — clean
• ✅ eslint — clean
• ✅ 3417 unit/component tests passing
• ✅ 5 browser component tests passing
• ✅ 6 Playwright e2e tests passsing
• ✅ Manual browser smoke test — no console errors/warnings

---

Have you read Terra's Contributing Guide lately? If not, do that first.

• Label PR with a Jira ticket number and include a link to the ticket
• Label PR with a security risk modifier [no, low, medium, high]
• PR describes scope of changes
• Get a minimum of one thumbs worth of review, preferably two if enough team members are available
• Get PO sign-off for all non-trivial UI or workflow changes
• Verify all tests go green
• Test this change deployed correctly and works on dev environment after deployment

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[github-actions]

Coverage Report for DUOS Coverage Report

Status	Category	Percentage	Covered / Total
🔵	Lines	85.68%	9855 / 11502
🔵	Statements	85.12%	10449 / 12276
🔵	Functions	81.63%	2866 / 3511
🔵	Branches	77.03%	5960 / 7737

File Coverage

No changed files found.

Generated in workflow #6273 for commit eb31011 by the Vitest Coverage Report Action

[otchet-broad]

Nice work! Tested locally and was able to complete all core functions through the UI.

[rushtong]

Fantastic, thank you 👍🏽