v2.4.0 - Vaccine Tracker, QR Pairing, Onboarding Wizard

What's New

Features

• Vaccine tracker - Track vaccinations with type, date, next-due date, dose number, notes. New Vaccines tab in Health screen.
• QR code partner pairing - Scan QR to link with other parent. Show My QR displays your code.
• Partner pairing options - Three ways: QR scan, npub paste, NIP-05 paste.
• Frictionless onboarding - Plain-English, one-tap key generation, QR-first pairing.
• Onboarding wizard - 7-page guided flow with progress dots.
• Sleep start/stop times - Cards show start-end range.
• Export npub - Copy npub/NIP-05 to clipboard from Settings.
• Default relay swap - nostr.oxtr.dev replaces relay.primal.net for new users.
• Author tracking - Every entry shows which parent logged it.
• Haptic feedback - Vibration on log buttons, toggle in Settings.
• Key safety warning - Warns that losing key means data loss.

Bug Fixes

• Cross-device timer sync - no more duplicate records
• Sleep trend double-counting - dedup fix

Technical

• DB migrations v4-v5 (authorPubkey) + v5-v6 (vaccines)
• BackupPayload v3-v4 (vaccines)
• New deps: ZXing, CameraX, ML Kit
• CAMERA permission added