MeshtasticAppShell
fun MeshtasticAppShell(multiBackstack: MultiBackstack, uiViewModel: UIViewModel, hostModifier: Modifier = Modifier, content: @Composable () -> Unit)(source)
Shared shell for setting up global UI logic across platforms (Android, Desktop).
This component handles deep linking, shared dialogs (via MeshtasticCommonAppSetup), and provides the global MeshtasticSnackbarProvider. Platform entry points should wrap their navigation layout inside this shell.