disable CloudKit until container is set up in Developer Portal

Use explicit ModelConfiguration with cloudKitDatabase: .none
to prevent CloudKit from failing on store load. Can be switched
to .automatic once the iCloud container is created.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

VoiceDiary/App/VoiceDiaryApp.swift

@@ -3,10 +3,26 @@ import SwiftUI
 
 @main
 struct VoiceDiaryApp: App {
+	let modelContainer: ModelContainer
+
+	init() {
+		let schema = Schema([DiaryEntry.self, VoiceMemo.self])
+		let configuration = ModelConfiguration(
+			"VoiceDiary",
+			schema: schema,
+			cloudKitDatabase: .none
+		)
+		do {
+			modelContainer = try ModelContainer(for: schema, configurations: [configuration])
+		} catch {
+			fatalError("Failed to create ModelContainer: \(error)")
+		}
+	}
+
 	var body: some Scene {
 		WindowGroup {
 			ContentView()
 		}
-		.modelContainer(for: DiaryEntry.self)
+		.modelContainer(modelContainer)
 	}
 }