- Created comprehensive QA checklist covering edge cases (missing EXIF, timezones, codecs, corrupt files)
- Added ErrorBoundary component wrapped around TimelineTree and MediaPanel
- Created global error.tsx page for unhandled errors
- Improved failed asset UX with red borders, warning icons, and inline error display
- Added loading skeletons to TimelineTree and MediaPanel
- Added retry button for failed media loads
- Created DEPLOYMENT_VALIDATION.md with validation commands and checklist
- Applied k8s recommendations:
- Changed node affinity to required for compute nodes (Pi 5)
- Enabled Tailscale LoadBalancer service for MinIO S3 (reliable Range requests)
- Enabled cleanup CronJob for staging files
