Release 1.12.0+70

Fixes:
* Modernize network detection with NetworkCapabilities API (replace deprecated APIs)
* Replace ScrollView with RecyclerView in Log page to prevent UI freeze
* Resolve multiple bugs and refactor dead code
* Remove unused multidex dependency
* Add network constraint to background RSS sync
* Add "back online" snackbar notification

Under the hood:
* Migrate AGP 8.13.2 to 9.2.1, Gradle 8.14.3 to 9.4.1
* Remove redundant SSL/TLS socket factories
* Remove dead BroadcastReceiver code path
