Cleanup upgrades

[oreo-collab]

This pull request upgrades core dependencies to resolve critical and high-severity vulnerabilities flagged during npm audit. Key changes include:

• Upgraded react-scripts to 5.0.1 (breaking change handled)
• Upgraded axios to 1.12.2 to patch multiple security advisories
• Ran npm audit fix --force to clean nested vulnerabilities
• Disabled sourcemap generation for optimized production build
• Verified successful build with npm run build

All changes tested locally and compiled successfully. Ready for deployment via Netlify.

Closes #security-cleanup