Chore: upgrade React, TypeScript and major dependencies to latest versionsFix/compose mail dependency upgrade

[reshalmenzes]

Summary

This PR upgrades the project to the latest versions of React and other major dependencies, along with compatibility fixes required to keep the app fully functional post-upgrade.

Packages Upgraded

• React & React DOM → v18
• TypeScript → latest
• React Router → v7
• Redux & Redux-Saga → latest
• Ant Design → v5
• Puppeteer → latest
• Jest & React Testing Library → latest
• All @types/* packages updated

Breaking Changes Fixed During Upgrade

🐛 React 18 — new root API

• Migrated from ReactDOM.render to createRoot in src/index.tsx
• Removed deprecated src/reportWebVitals.ts (breaking changes in latest web-vitals)

🐛 Ant Design v5 — visible → open on Modal

• <Modal visible={...}> was renamed to <Modal open={...}> in v5
• This was silently preventing the Compose Mail modal from opening
• Fixed in: src/components/modal/default.tsx

🐛 React Router v7 — useParams typing changes

• Updated useParams typing for compatibility
• Fixed in: src/components/emails/view.tsx

🐛 localStorage API misuse (found during testing)

• localStorage.currentUser = value was used instead of localStorage.setItem('currentUser', value)
• Caused currentUser to not persist properly, breaking compose mail silently
• Fixed in: src/services/api.ts, src/store/auth/reducer.ts

🐛 Modal reducer — default case forcing modal closed

• The default case was returning { open: false }, closing the modal on every Redux action
• CLOSE_MODAL case was missing entirely
• Fixed in: src/store/modal/reducer.ts

Testing

• App builds successfully after upgrade
• Login and session persistence works
• Compose Mail modal opens correctly
• Can send and receive emails
• Can view email detail
• Logout works correctly