App/Sources/Views/TaskGroupListView.swift

@@ -12,12 +12,18 @@ struct TaskGroupListView: View {
 
     // MARK: Properties
 
+    /// Binding to the currently selected todo task group.
+    ///
+    /// When provided, the view will use this binding for navigation split view selection.
+    @Binding
+    private var group: TodoGroup?
+
     /// Query to monitor all todo tasks for changes.
     ///
     /// This query triggers view updates whenever todo tasks are inserted, updated, or deleted,
     /// ensuring the task counts displayed in the view remain accurate.
     @Query
-    private var tasks: [Todo]
+    private var todos: [Todo]
 
     /// The view model managing the state and logic for this view.
     ///
@@ -26,6 +32,18 @@ struct TaskGroupListView: View {
     @State
     private var viewModel = ViewModel()
 
+    // MARK: Initializers
+
+    /// Creates a task group list view with a binding to the selected group.
+    ///
+    /// This initializer configures the view for use in a navigation split view,
+    /// where the binding tracks which task group is currently selected in the sidebar.
+    ///
+    /// - Parameter group: A binding to the currently selected task group.
+    init(_ group: Binding<TodoGroup?>) {
+        self._group = group
+    }
+
     // MARK: Body
 
     /// The content and behavior of the view.
@@ -35,24 +53,30 @@ struct TaskGroupListView: View {
     /// - The group's title
     /// - The current count of tasks in that group
     ///
-    /// Cards are tappable and navigate to a detailed task list for the selected group.
+    /// Cards are tappable and update the selected group binding for navigation split view.
     /// Task counts are fetched on-demand from the model context for each render.
     var body: some View {
-        ScrollView {
-            VStack(spacing: 16) {
-                ForEach(viewModel.groups) { group in
-                    NavigationLink(destination: TaskListView(group: group)) {
+        List(
+            viewModel.groups,
+            selection: $group
+        ) { group in
             Card(
                 group: group,
-                            count: viewModel.count(tasks, for: group)
+                count: viewModel.count(
+                    todos,
+                    for: group
                 )
+            )
+            .listRowBackground(Color.clear)
+            .listRowSeparator(.hidden)
+            .tag(group)
         }
-                    .buttonStyle(.plain)
-                }
-            }
-            .padding(.horizontal)
-        }
+        .listStyle(.plain)
         .navigationTitle("view.task-group-list.navigation.title")
+        .sensoryFeedback(
+            .selection,
+            trigger: group
+        )
     }
 }
 
@@ -62,8 +86,12 @@ struct TaskGroupListView: View {
     "Task group list with empty tasks",
     traits: .emptyContainer
 ) {
+    @Previewable
+    @State
+    var group: TodoGroup?
+
     NavigationStack {
-        TaskGroupListView()
+        TaskGroupListView($group)
     }
 }
 
@@ -71,7 +99,11 @@ struct TaskGroupListView: View {
     "Task group list with sample tasks",
     traits: .sampleTasks
 ) {
+    @Previewable
+    @State
+    var group: TodoGroup?
+
     NavigationStack {
-        TaskGroupListView()
+        TaskGroupListView($group)
     }
 }