import UserNotifications

/// Sets the app icon badge to an unread count.
///
/// A push carries `aps.badge` and iOS applies it on arrival, so the badge
/// is right the moment a notification lands. It is not right afterwards:
/// nothing tells iOS the count dropped when the inbox is read in the app,
/// and the number sits there until the next push. These calls close that.
///
/// The value is always the active account's unread count. The badge is
/// per-device and unread is per-account, so with two accounts signed in
/// the last writer wins — a push for one account, then a dashboard load
/// on the other, disagree. Exact for a single account.
///
/// Failures are ignored. A badge that did not take is not worth telling
/// anyone about, and the next writer corrects it.
func setAppBadge(_ count: Int) async {
    try? await UNUserNotificationCenter.current().setBadgeCount(max(0, count))
}