feat: add RecoveryInfoScreen component showing Shamir share status
Implements read-only display of recovery share status for MM-150.AC3:
- Share 1 shows live Keychain check result (✓ or ✗)
- Share 2 shows static relay custody fact (always ✓)
- Share 3 shows manual backup reminder (clipboard icon)
- Back button returns to home screen
Verifies MM-150.AC3.11, AC3.12, AC3.13, AC3.14