Healthkit

HEALTHKIT:

• import HealthKit; HKHealthStore()
• Check availability: HKHealthStore.isHealthDataAvailable()
• Request auth: healthStore.requestAuthorization(toShare:read:)
• Requires NSHealthShareUsageDescription + NSHealthUpdateUsageDescription (add CONFIG_CHANGES)
• Requires com.apple.developer.healthkit entitlement (add CONFIG_CHANGES)
• Query: HKSampleQuery, HKStatisticsQuery for aggregated data
• Common types: HKQuantityType(.stepCount), .heartRate, .activeEnergyBurned