Implemented the Persisting the selected locale across launches on the ContentView view in the Sample app target.

Apps/Attendi/Sources/View Models/ContentViewModel.swift

@@ -8,7 +8,8 @@ extension ContentView {
     /// The observable model that drives ``ContentView``.
     ///
     /// The model owns the recording and transcribing services attached to the recording feature, along with the ``locale`` the feature
-    /// transcribes in, picked in the view's toolbar from the supported ``locales`` that ``load()`` fetches. It also holds the transcription
+    /// transcribes in, picked in the view's toolbar from the supported ``locales`` that ``load(identifier:)`` fetches — restoring the
+    /// locale the view persisted across launches, when one exists. It also holds the transcription
     /// currently presented in the view's modal sheet: ``received(_:)`` presents the transcription of a processed recording, and
     /// ``dismissed()`` clears it when the sheet closes.
     ///
@@ -30,7 +31,7 @@ extension ContentView {
         /// The transcription currently presented in the modal sheet, or `nil` when none is shown.
         var transcription: Transcription?
 
-        /// The locales the transcriber supports, sorted by their localized names, or empty while ``load()`` has not finished yet.
+        /// The locales the transcriber supports, sorted by their localized names, or empty while ``load(identifier:)`` has not finished yet.
         private(set) var locales: [Locale]
 
         /// The service that captures the audio from a microphone.
@@ -88,10 +89,20 @@ extension ContentView {
         // MARK: Methods
 
         /// Loads the locales the transcriber supports — resolved through the preinstalling service — into ``locales``, sorted by their
-        /// localized names, and aligns ``locale`` with the supported equivalent of its current value — falling back to the supported
+        /// localized names, and aligns ``locale`` with the supported equivalent of its current value — restored first from the given
-        /// equivalent of a default locale when none exists — so the locale picker starts with a valid selection. It then kicks off the
+        /// persisted identifier when one exists, and falling back to the supported equivalent of a default locale when no equivalent
-        /// preinstallation of the aligned locale's speech model assets.
+        /// exists — so the locale picker starts with a valid selection. It then kicks off the preinstallation of the aligned locale's
-        func load() async {
+        /// speech model assets.
+        ///
+        /// - Parameter identifier: The identifier of the locale persisted across launches, or an empty string when none has been
+        /// persisted yet.
+        func load(
+            identifier: String
+        ) async {
+            if !identifier.isEmpty {
+                locale = .init(identifier: identifier)
+            }
+            
             locales =
                 await preinstaller
                 .supportedLocales()

Apps/Attendi/Sources/Views/ContentView.swift

@@ -8,7 +8,8 @@ import SwiftUI
 /// inside a navigation stack, and presents the transcribed text of every processed recording in a modal sheet of its own navigation stack.
 /// A toolbar menu picks the locale of the spoken language to transcribe, and every pick kicks off the preinstallation of the locale's speech
 /// model assets, whose download events surface as transient in-app notifications — banners wearing the `Notifying` target's label
-/// style — overlaying the feature just below the navigation bar.
+/// style — overlaying the feature just below the navigation bar. The picked locale persists across launches in the user defaults, and is
+/// restored — realigned to the supported locales — before the feature loads.
 ///
 /// The services attached to the feature, the transcription shown in the sheet, and the notifier owning the notifications live in the view's
 /// ``Model``; the view itself only renders it and forwards the feature's output, the picker's changes, and the sheet's dismissal. All
@@ -17,6 +18,10 @@ struct ContentView: View {
 
     // MARK: Properties
 
+    /// The identifier of the picked locale, persisted across launches.
+    @AppStorage(Constant.Key.locale)
+    private var localeIdentifier: String = ""
+
     /// The model that owns the attached services, the transcription presented in the modal sheet, and the notifier of the in-app
     /// notifications.
     @State
@@ -36,7 +41,8 @@ struct ContentView: View {
     // MARK: Body
 
     /// The content of the view: a navigation stack with the recording feature's view, attached to the model's services and expanded to fill
-    /// the available space, with a toolbar picker for the locale of the spoken language to transcribe, and a modal sheet presenting the
+    /// the available space, with a toolbar picker for the locale of the spoken language to transcribe — restored from the user defaults
+    /// before the model loads, and persisted back on every change — and a modal sheet presenting the
     /// 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 notifier'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
@@ -70,12 +76,16 @@ struct ContentView: View {
                 stackNotifications
             }
             .task {
-                await model.load()
+                await model.load(
+                    identifier: localeIdentifier
+                )
             }
             .onChange(
                 of: model.locale,
                 initial: false
             ) {
+                localeIdentifier = model.locale.identifier
+
                 model.preinstall()
             }
         }
@@ -211,6 +221,12 @@ private extension ContentView {
 
 /// The constant values used across the view.
 private enum Constant {
+    /// The key constants.
+    enum Key {
+        /// The user defaults key of the persisted locale identifier.
+        static let locale = "com.rock-n-code.app.attendi.sample.user-defaults.ket.selected-locale"
+    }
+
     /// The spacing constants.
     enum Spacing {
         /// The spacing between the elements of a stack.

Apps/Attendi/Tests/Attendi.xctestplan

@@ -0,0 +1,24 @@
+{
+  "configurations" : [
+    {
+      "id" : "D599315E-CE89-41A2-A181-811F9CF40731",
+      "name" : "Configuration 1",
+      "options" : {
+
+      }
+    }
+  ],
+  "defaultOptions" : {
+
+  },
+  "testTargets" : [
+    {
+      "target" : {
+        "containerPath" : "container:Attendi.xcodeproj",
+        "identifier" : "0296F7992FFA954E00D2C5FC",
+        "name" : "AttendiTests"
+      }
+    }
+  ],
+  "version" : 1
+}

Apps/Attendi/Tests/View Models/ContentViewModelTests.swift

@@ -25,7 +25,7 @@ struct ContentViewModelTests {
 
             let model = Model(preinstaller: preinstaller)
 
-            await model.load()
+            await model.load(identifier: "")
 
             #expect(model.locale == .english)
             #expect(model.locales.count == 2)
@@ -33,6 +33,34 @@ struct ContentViewModelTests {
             #expect(model.locales.contains(.english))
         }
 
+        @Test
+        func `load restores the persisted locale`() async {
+            let preinstaller = PreinstallingMock()
+
+            preinstaller.localesSupported = [.dutch, .english]
+            preinstaller.equivalents = [.dutch: .dutch]
+
+            let model = Model(preinstaller: preinstaller)
+
+            await model.load(identifier: Locale.dutch.identifier)
+
+            #expect(model.locale == .dutch)
+        }
+
+        @Test
+        func `load falls back to the default locale when the persisted locale is unsupported`() async {
+            let preinstaller = PreinstallingMock()
+
+            preinstaller.localesSupported = [.dutch, .english]
+            preinstaller.equivalents = [.byDefault: .english]
+
+            let model = Model(preinstaller: preinstaller)
+
+            await model.load(identifier: "fr-FR")
+
+            #expect(model.locale == .english)
+        }
+
         @Test
         func `load preinstalls the aligned locale`() async throws {
             let preinstaller = PreinstallingMock()
@@ -42,7 +70,7 @@ struct ContentViewModelTests {
 
             let model = Model(preinstaller: preinstaller)
 
-            await model.load()
+            await model.load(identifier: "")
 
             try await Task.sleep(for: .seconds(0.1))
 
@@ -203,6 +231,8 @@ struct ContentViewModelTests {
 // MARK: - Constants
 
 private extension Locale {
+    /// The locale the model falls back to when no equivalent of the current locale is supported.
+    static let byDefault = Locale(identifier: "en_US")
     /// A supported locale to preinstall in the tests.
     static let dutch = Locale(identifier: "nl-NL")
     /// Another supported locale to preinstall in the tests.

Attendi.xcodeproj/xcshareddata/xcschemes/Attendi.xcscheme

@@ -27,8 +27,13 @@
       buildConfiguration = "Debug"
       selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
       selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
-      shouldUseLaunchSchemeArgsEnv = "YES"
+      shouldUseLaunchSchemeArgsEnv = "YES">
-      shouldAutocreateTestPlan = "YES">
+      <TestPlans>
+         <TestPlanReference
+            reference = "container:Apps/Attendi/Tests/Attendi.xctestplan"
+            default = "YES">
+         </TestPlanReference>
+      </TestPlans>
    </TestAction>
    <LaunchAction
       buildConfiguration = "Debug"