* fix(#65): request POST_NOTIFICATIONS runtime permission on Android 13+ On API 33+ the manifest declaration alone is not enough — the app must request POST_NOTIFICATIONS via ActivityResultContracts.RequestPermission at runtime before it can show any notification, including the foreground service notification from ChatNotificationService. - Added rememberLauncherForActivityResult for POST_NOTIFICATIONS - Added LaunchedEffect(Unit) that fires the permission request on first composition when running on API 33+ and permission is not yet granted - The next lifecycle event (ON_STOP → NotificationHelper.start) picks up the permission if granted * fix: add missing import android.os.Build for POST_NOTIFICATIONS permission check * fix: add missing import for rememberLauncherForActivityResult (androidx.activity.compose) --------- Co-authored-by: M57 <hy4ri@users.noreply.github.com>