* 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>
