Call state reload on restart:
- Loads Ringing/Active calls from sled into active_calls on startup
- Expires calls older than 24h automatically
TUI sender ETH cache prefill:
- prefill_eth_cache() resolves all known contacts on poll_loop start
- First message from known contacts now shows ETH address immediately
Server integration tests (10 new):
- push_to_client offline/online
- register_ws + connection cap (5 max)
- is_online + device_count
- kick_device + revoke_all_except
- deliver_or_queue offline/online
- call state lifecycle
- list_devices
155 tests passing (was 135)
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>