When user enables HealthKit integration, automatically syncs all
previously recorded mood entries to Apple Health. Features:
- Progress tracking with visual indicator in Settings
- Batched saves with throttling to avoid overwhelming HealthKit
- Success/failure logging with EventLogger
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
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