- Create MobileChannel for geographic bounds-based packet filtering
- Add MobileUserSocket for mobile client connections
- Implement subscribe_bounds, update_bounds, and unsubscribe events
- Leverage existing StreamingPacketsPubSub infrastructure
- Add comprehensive mobile API documentation with Swift examples
- WebSocket endpoint: wss://aprs.me/mobile/websocket
- Channel: mobile:packets
This enables iOS/Android apps to receive real-time APRS packets
filtered by geographic viewport, with efficient bandwidth usage.
