- Add comprehensive edge case tests for Menubar avatar display logic
- Add timezone fallback edge case tests for eventUtils
- Cover null/undefined/empty string scenarios for user data
- Cover invalid/missing timezone scenarios with UTC fallback
- Ensure robust error handling and graceful degradation
- Save PKCE params to sessionStorage.redirectState on 401 instead of overwriting tokenSet
- Persist userData in sessionStorage after OIDC callback for later hydration
- Hydrate Redux (tokens + userData) from sessionStorage on app start to avoid forced re-login
- Keep SPA single route '/' behavior unchanged; only improves auth robustness
Files: src/utils/apiUtils.ts, src/features/User/LoginCallback.tsx, src/features/User/HandleLogin.tsx