- Add boto3 direct download for S3/MinIO stored images - Implement 6-level file fallback: DB → S3 → Local → URL → API → Attributes - Sync S3 support to Chinese version (export_to_word_cn.py) - Update version to 0.4.2 - Rewrite README.md and README_CN.md following standard format - Update docs version numbers - Add file storage access guidelines to copilot-instructions.md