- Send config to native before starting tracking (SharedPreferences sync)
- Register ConnectivityReceiver for network state detection
- Fix Settings number fields using TextEditingControllers
- Cancel stream subscription on widget dispose (memory leak)
- Replace WorkManager with AlarmManager for heartbeat
- Add log cleanup for logs older than 24 hours
- Change HTTP method from GET to POST
These fixes resolve the 'device always offline' issue where:
1. Config was not being sent to native service
2. ConnectivityReceiver was never registered
3. Settings number fields were not saving
4. Heartbeat never fired due to WorkManager process isolation
5. Server expected POST not GET
