- Configure release signing via key.properties + Gradle Kotlin DSL
- Add INTERNET and ACCESS_NETWORK_STATE permissions to AndroidManifest
(Flutter injects INTERNET automatically in debug builds but not release,
causing DNS failures in sideloaded APKs)
- Restore android/.gitignore entries lost during signing setup
- Gitignore key.properties and fabled-release-key.jks
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>