iOS 18 HealthKit: Create Interactive Dashboards with SwiftUI

Set up the project using MVVM in SwiftUI, creating models for chart data, health metrics, and health records, plus a health kit manager and dashboard views.

Define a chart data model in SwiftUI by creating a chart data struct with date, calories, barX, and barHeight, to display values in a health metric chart.

Define a HealthMetric model in SwiftUI to drive the dashboard tiles, listing calories, steps, stand hours, exercise minutes, heart rate, and flights climbed, with system images and HealthKit unit mapping.

Extend the HealthKit metric enum with color, unit, and quantity type mappings for calories, steps, stand hours, exercise minutes, heart rate, and flights climbed, plus statistics options.

Create a health record model that converts HealthKit data into a dashboard-ready format by a health record struct conforming to identifiable with a uuid, date, and value.

Build the HealthKit manager view model to handle authorization, fetch the last seven days of health data, and assign records to health metrics for dynamic dashlets.

Builds a health data view model by using a loading indicator and a task group to fetch health metrics, then updates health records from HealthKit for seven days.

Create a permissions view in an iOS 18 HealthKit app using SwiftUI to request health data access and authorization, plus privacy messages for health share and health record usage.

Create a metric card dashlet in SwiftUI HealthKit dashboards, computing weekly total and average from health data, and render a mini line chart with date range and a card-style UI.

Build the metric detail view with a health kit manager and SwiftUI chart, adding drag gesture and geometry reader to reveal the closest record.

Implement a chart bubble in SwiftUI to display metric data with date and value, styled by color, and show a record list under a HealthKit dashboard.