Exercise 2: Showing Priority in Detail View & Disabling Save When Empty — Possible Solution
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// Updated TaskDetailView (reusing TaskRow's own priorityLabel logic):
struct TaskDetailView: View {
    let task: Task
    let store: TaskStore

    var priorityLabel: String {
        switch task.priority {
        case 1: return "Low"
        case 2: return "Medium"
        default: return "High"
        }
    }

    var body: some View {
        VStack(spacing: 16) {
            Text(task.title).font(.largeTitle)
            Text("Priority: \(priorityLabel)").font(.subheadline)
            Button(task.isDone ? "Mark as Not Done" : "Mark as Done") {
                store.toggleDone(for: task)
            }
        }
        .padding()
        .navigationTitle("Task Detail")
    }
}

// Updated NewTaskView's toolbar:
.toolbar {
    Button("Save") {
        store.add(title: title, priority: priority)
        dismiss()
    }
    .disabled(title.isEmpty)
}

HOW IT WORKS: TaskDetailView gains its own priorityLabel computed
property - the same switch-based logic already used in TaskRow,
duplicated here rather than shared, since sharing it cleanly would
need a small refactor (e.g. moving it onto Task itself) beyond this
exercise's own scope - and displays it in a new Text view.

The Save button's real .disabled(title.isEmpty) modifier ties the
button's own enabled state directly to whether title currently holds
any real text. When title is empty, the button appears visibly
greyed-out and genuinely cannot be tapped at all - a real, immediate
visual signal to the user that something is missing, replacing the
original version's own silent no-op behavior (the guard statement
that quietly did nothing) with an actual disabled control the user can
see and understand.

ANSWER: TaskDetailView now computes and displays a priorityLabel using
the same switch-based logic as TaskRow. NewTaskView's Save button uses
.disabled(title.isEmpty) to visibly grey out and disable itself
whenever no title has been entered, replacing the original silent
no-op with a real, visible signal that the form isn't ready to submit.

WHY THIS WORKS AS AN ANSWER
------------------------------
This correctly extends the detail view with real priority display and
replaces silent validation with the real .disabled() modifier, giving
the user actual visible feedback rather than an invisible guard clause.