Improved test coverage for file download header functionality:
- Added test for content-type download with valid filename
- Added test for file-type download with valid file path
- Added security test for invalid file path protection
- Added test for automatic file extension handling
- Added test for Safari browser filename encoding
- Added test for different MIME type content headers
- Added test for empty filename boundary handling
- Integrated with fileTest helper class for better test structure
🤖 Generated with [Claude Code](https://claude.ai/code)
Co-Authored-By: Claude <noreply@anthropic.com>
liyang