Image Hosting — push images to your S3-compatible bucket

Push images to your own S3 / R2 / Aliyun OSS / Tencent COS / MinIO bucket instead of into the GitHub repo. Article repos stay text-only.

• Pure-TS AWS Signature V4 (Web Crypto API), no SDK
• Verified against AWS docs known-answer test
• Date-prefixed keys: pathPrefix/YYYY/MM/DD/sha8.ext
• Failed uploads silently fall back to GitHub repo
• Test Upload button to verify CORS + credentials

Released in v0.7.0.