- Add MinIO service to docker-compose.dev.yml with auto-bucket initialization
- Create @manacore/shared-storage package with S3-compatible client
- Add factory functions for each project (Picture, Chat, ManaDeck, etc.)
- Include file utilities (generateFileKey, getContentType, validators)
- Update environment variables for S3/MinIO configuration
- Document storage architecture in CLAUDE.md
Local dev uses MinIO, production will use Hetzner Object Storage.
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Co-Authored-By: Claude <noreply@anthropic.com>