Push Notifications Implement, review, and debug local and remote notifications on iOS/macOS using and APNs. Covers permission flow, token registration, payload structure, foreground handling, notification actions, grouping, and rich notifications. Targets iOS 26+ with Swift 6.3, backward-compatible to iOS 16 unless noted. Keep adjacent domains separate: Live Activity payloads belong in ; PushKit/VoIP call pushes belong in ; App Clip ephemeral notification setup belongs in ; long-running or scheduled background work after a silent push belongs in . Contents - Correction Reviews - Permission Fl…