- Update CI configuration to use macOS-15 runner with Xcode 16.3
- Expand test coverage with comprehensive new test suites:
* JSONOutputTests.swift - JSON encoding/decoding and MCP compliance
* LoggerTests.swift - Thread-safe logging functionality
* ImageCaptureLogicTests.swift - Image capture command logic
* TestTags.swift - Centralized test tagging system
- Improve existing tests with Swift Testing patterns and async support
- Make Logger thread-safe with concurrent dispatch queue
- Add performance, concurrency, and edge case testing
- Fix compilation issues and optimize test performance
🤖 Generated with [Claude Code](https://claude.ai/code)
Co-Authored-By: Claude <noreply@anthropic.com>
