feat(appstore): add AppStore client features
- AppStoreJsBridge: JS bridge for native APK install, version check, update
- InstalledAppDao, InstalledApp entity: Room DB for tracking installed apps
- UpdateCheckerWorker: background update polling via WorkManager
- InstallerService: APK download + SHA-256 verify + PackageInstaller session
- Updated AndroidManifest: REQUEST_INSTALL_PACKAGES, FileProvider, receivers
- Updated MainActivity: notification channel, WorkManager, JS bridge wiring
- config.json: targetUrl = https://store.silverlabs.uk
- file_paths.xml: FileProvider paths for APK installs
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
SysAdmin
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