- Add new "Setup Guide" section to `docs/storage-r2.md` detailing the dual-credential requirement (S3 Keys + Cloudflare API Token) for full automation.
- Remove unsupported "manual/S3-only" workflow documentation to prevent user confusion.
- Update `js/services/r2Service.js` error message to explicitly prompt users for an API Token when the public domain is missing, instead of suggesting manual configuration.