- Update Package.swift to swift-tools-version: 6.0
- Add @preconcurrency import CoreML/AVFoundation throughout codebase
- Make structs Sendable (AppLogger, DownloadConfig, etc.)
- Use nonisolated(unsafe) for static mutable state
- Fix AudioStream by removing @unchecked Sendable, making AsyncCallback
@Sendable
- Fix Task closures with proper explicit captures
- Convert concurrent tests to sequential where types aren't Sendable
- Add @MainActor to test methods using waitForExpectations
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### Why is this change needed?
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resolve#231
Alex