yushen edf4c00c08 fix(upload): add file type/size validation, Content-Disposition header ...

- Add content type allowlist (images, PDF, text, video, audio, zip)
- Enforce 10 MB upload limit via http.MaxBytesReader
- Set Content-Disposition on S3 objects for proper download filenames
- Remove unused CloudFrontSigner.Domain() method

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

2026-03-31 14:55:27 +08:00

1.9 KiB

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