The deployed app looped /login -> / -> /login forever: Login sees a
valid Supabase session and navigates to /, the global FolderProvider
pulls GET /api/v1/storage/folders, the backend rejects it with 401, and
the global error handler hard-redirects back to /login?from=/bpp.
fileSyncService's /api/v1/storage/files pull already opts out via
suppressErrorToast + skipAuthRedirect, so its 401 fails silently;
folderSyncService.list() passed neither flag, so its 401 fell through to
the redirect. Add the same flags - FolderContext.pullFromServer already
handles 4xx locally (flips serverReachable, suppresses the banner).
Note: the underlying 401 on /api/v1/storage/* with a valid session is a
backend/deployment issue (storage endpoints rejecting the Supabase
token); this change makes the frontend resilient so it degrades to
"folder sync unavailable" instead of an auth loop.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
