- SettingsScreen: Add DisposableEffect for BroadcastReceiver lifecycle management
- MainActivity: Add error logging and permission checks before download
- ApkDownloadManager: Add install permission validation with Settings.canRequestPackageInstalls()
- Add user feedback with Toast messages for all error cases
- Bump version to 1.11.6
Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-opencode)
Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>
