Automatic chunk-load recovery and login error fixes

This release improves reliability with automatic recovery from chunk-load errors, along with two fixes to login error handling in standalone apps.

The app now reloads automatically when a JavaScript chunk fails to load. This commonly happens after a new deploy invalidates cached assets, and previously left users on a broken screen until they refreshed manually. No code changes are required to opt in.

• LoginError now stays synchronous in standalone apps, so error handling runs in the same tick as the failure.
• The LoginError auto-logout flow guards against re-entry, preventing duplicate logout attempts when an error fires mid-logout.