Added accessibility support to in-app notifications on the ContentViewModel view model in the Sample app.

Apps/Attendi/Views/ContentView.swift

@@ -25,7 +25,8 @@ struct ContentView: View {
     /// transcribed text of every processed recording — or a content unavailable message when the transcription is empty — closable
     /// through its toolbar button or a swipe. The model's in-app notifications overlay the feature, stacking downward just below the
     /// navigation bar; each one slides in from the leading edge when posted and out again when its scheduled dismissal arrives, without
-    /// displacing the recording controls underneath.
+    /// displacing the recording controls underneath. Every posted notification is also announced to assistive technologies, since the
+    /// banners themselves are transient.
     var body: some View {
         NavigationStack {
             RecordingView(
@@ -100,6 +101,7 @@ private extension ContentView {
             )
         }
         .disabled(model.locales.isEmpty)
+        .accessibilityHint(Text("view.recording.picker.locale.hint"))
     }
 
     /// The stack of the model's in-app notifications, each one sliding in from the leading edge when posted and out again when
@@ -116,10 +118,14 @@ private extension ContentView {
                     Text(notification.textMessage)
                 } icon: {
                     Image(systemName: notification.imageSymbol)
+                        .accessibilityHidden(true)
                 }
                 .labelStyle(.notification(
                     event: notification.event
                 ))
+                .accessibilityElement(
+                    children: .combine
+                )
                 .transition(.move(
                     edge: .leading
                 ).combined(
@@ -181,35 +187,6 @@ private extension ContentView {
 
 }
 
-// MARK: - AppNotification+Extensions
-
-private extension AppNotification {
-    
-    // MARK: Properties
-    
-    /// The system symbol of the icon matching the notification's event.
-    var imageSymbol: String {
-        switch event {
-        case .cancelled: "xmark.circle"
-        case .failed: "exclamationmark.triangle"
-        case .started: "arrow.down.circle"
-        }
-    }
-    
-    // MARK: Methods
-    
-    /// The localized message of the notification, naming the locale of the speech model, from the app's string catalog.
-    var textMessage: LocalizedStringResource {
-        switch event {
-        case .cancelled: .viewRecordingNotificationDownloadCancelled(localeName)
-        case .failed: .viewRecordingNotificationDownloadFailed(localeName)
-        case .started: .viewRecordingNotificationDownloadStarted(localeName)
-        }
-    }
-    
-}
-
-
 // MARK: - Constants
 
 /// The constant values used across the view.