- Add Workbox-based service worker to cache JS, CSS, and fonts
- JS/CSS cached for 30 days, fonts for 1 year
- Support for CDN assets via ASSET_CDN_HOST
- Version-based cache invalidation on deployments
- Automatic cache cleanup for old versions
- Build service worker during asset precompilation
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>