## Summary
- S3 `File.presign()` was ignoring the `contentDisposition` and `type`
options
- These options are now properly included as
`response-content-disposition` and `response-content-type` query
parameters in the presigned URL
- Added `content_type` field to `SignOptions` and
`S3CredentialsWithOptions` structs
- Added parsing for the `type` option in `getCredentialsWithOptions()`
- Query parameters are added in correct alphabetical order for AWS
Signature V4 compliance
## Test plan
- [x] Added regression test in `test/regression/issue/25750.test.ts`
- [x] Verified tests pass with debug build: `bun bd test
test/regression/issue/25750.test.ts`
- [x] Verified tests fail with system bun (without fix):
`USE_SYSTEM_BUN=1 bun test test/regression/issue/25750.test.ts`
- [x] Verified existing S3 presign tests still pass
- [x] Verified existing S3 signature order tests still pass
Fixes#25750🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-authored-by: Claude Bot <claude-bot@bun.sh>
Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>
