Avatar and logo images load faster with smart thumbnailing

Avatars and org logos now load as thumbnails instead of full-size originals, reducing bandwidth and page load time.

Improvements

Avatar and organization logo images no longer download at full resolution. The AvatarImage component now serves optimized thumbnails automatically — in workspace navigation, member lists, profile cards, and everywhere else avatars appear. This reduces bandwidth and improves perceived performance across the app.

We also fixed a database connection pooling issue that was breaking sign-in on preview builds, improving reliability for developers testing feature branches.