Recapture globe animation: slower rotation, equator-centered

- 15-second loop (was 6s) to reduce motion sickness
- Camera centered on equator showing both hemispheres (was tilted north)
- 120 frames, 3.8 MB

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: rdhyee