Backend:
- Set JWT as HttpOnly cookie on login, add cookie fallback in auth middleware
- Add /auth/logout endpoint to clear cookie
- Fix CORS to echo origin with Allow-Credentials for withCredentials requests
- Make SPA static serving optional via SERVE_SPA config flag
Frontend:
- Remove manual token management; rely on HttpOnly cookie + withCredentials
- Simplify auth-slice to authenticated boolean flag
- Fix Artefact interface to match backend fields (sha256Hash, fileName, fileSize)
- Fix artefact upload endpoint and send version in FormData
- Use KiB/MiB for file size display
- Move Redux hooks from store/hooks to hooks/store
