fix CoreData store crash: create Application Support dir, explicit local config

The Application Support directory doesn't always exist on fresh
installs. Create it explicitly before configuring ModelContainer.
Use explicit store URL and cloudKitDatabase: .none to prevent
any CloudKit/remote notification options from being added.

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

VoiceDiary/App/VoiceDiaryApp.swift

@@ -3,10 +3,28 @@ import SwiftUI
 
 @main
 struct VoiceDiaryApp: App {
+	let modelContainer: ModelContainer
+
+	init() {
+		// Ensure Application Support directory exists
+		let appSupport = FileManager.default.urls(for: .applicationSupportDirectory, in: .userDomainMask).first!
+		try? FileManager.default.createDirectory(at: appSupport, withIntermediateDirectories: true)
+
+		let schema = Schema([DiaryEntry.self, VoiceMemo.self])
+		let storeURL = appSupport.appendingPathComponent("VoiceDiary.store")
+		let config = ModelConfiguration("VoiceDiary", schema: schema, url: storeURL, cloudKitDatabase: .none)
+
+		do {
+			modelContainer = try ModelContainer(for: schema, configurations: [config])
+		} catch {
+			fatalError("Failed to create ModelContainer: \(error)")
+		}
+	}
+
 	var body: some Scene {
 		WindowGroup {
 			ContentView()
 		}
-		.modelContainer(for: [DiaryEntry.self, VoiceMemo.self])
+		.modelContainer(modelContainer)
 	}
 }