Avatar images now load from custom Supabase domains

Fixed broken image loading when using custom api.operant360.com and staging domains for Supabase storage.

Bug Fixes

After rewriting your Supabase storage to use custom domains (api.operant360.com and staging.api.operant360.com), presigned image URLs from those hosts were rejected by Next.js image optimization with 400 errors. We've added both domains to the image optimizer's whitelist so avatars and images now load correctly.