Add a "verifying" connection state between "connected" and "registered"
so collaborators see clear feedback while waiting for the device owner
to approve their connection on Desktop.
Changes across the stack:
- Hub: verify RPC returns isNewDevice flag to distinguish new vs whitelisted
- SDK: emit "verifying" state before verify RPC, pass isNewDevice through
- Store: capture isNewDevice via onVerified, capture rejection via onError
- UI: ConnectionStatus (waiting), RejectedStatus (declined), and
verify success overlay (approved) replace the stuck scanner screen
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
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