- Implement text injection with paste method (NSPasteboard + ⌘V)
- Add typing fallback with Unicode support and keyboard layout respect
- Integrate secure input detection using IsSecureEventInputEnabled()
- Add comprehensive permission checking and management
- Create Permissions tab in preferences with status indicators
- Add permission onboarding flow for new users
- Implement automatic fallback between injection methods
- Add deep links to System Settings for permission grants
- Remove duplicate preferences menu item
- Create development build script for easier testing
- Update Phase 3 tasks as completed in TODO.md
- Add SwiftWhisper integration for real whisper.cpp support with Metal acceleration
- Implement complete WhisperCPPEngine with audio transcription and text normalization
- Build ModelManager with curated catalog, downloads, and Core ML encoder support
- Create preferences window with model management UI (download, select, delete)
- Add NSStatusItem menu bar with model status display
- Integrate STT pipeline: hotkey → audio capture → whisper transcription
- Add model setup alerts when no model is loaded
- Support offline operation with performance targets met (<4s for 10s audio)
- Store models in ~/Library/Application Support/MenuWhisper/Models/
Phase 2 TECHSPEC requirements fully implemented and tested.