iOS was missing NSFaceIDUsageDescription — Face ID prompts will crash without it (required by Apple since iOS 11). Added with user-facing reason string scoped to health data privacy. Android was missing USE_BIOMETRIC and USE_FINGERPRINT permissions — biometric_local_auth plugin requires both for API 28+/legacy compat. The Flutter implementation was already complete: - BiometricService (services/biometric_service.dart) - AuthGate lock screen (core/auth_gate.dart) - Settings toggle with policy control (features/settings/) - Wired into main.dart These permission declarations were the only missing pieces blocking Face ID / fingerprint from working on device. |
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