- Add GET /api/channels endpoint for live radio channel data
- Create ChannelPicker component (single/multi-select from live channels)
- Create NodePicker component (searchable multi-select from mesh nodes)
- Replace manual inputs in Config with data-driven pickers
- Update Notifications to use pickers for mesh broadcast/DM
- Resolve node names in Alerts subscriptions display
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
