macOS: split AppMain into focused modules

apps/macos/Sources/Clawdis/NotificationManager.swift

@@ -0,0 +1,31 @@
+import Foundation
+import UserNotifications
+
+@MainActor
+struct NotificationManager {
+    func send(title: String, body: String, sound: String?) async -> Bool {
+        let center = UNUserNotificationCenter.current()
+        let status = await center.notificationSettings()
+        if status.authorizationStatus == .notDetermined {
+            let granted = try? await center.requestAuthorization(options: [.alert, .sound, .badge])
+            if granted != true { return false }
+        } else if status.authorizationStatus != .authorized {
+            return false
+        }
+
+        let content = UNMutableNotificationContent()
+        content.title = title
+        content.body = body
+        if let soundName = sound, !soundName.isEmpty {
+            content.sound = UNNotificationSound(named: UNNotificationSoundName(soundName))
+        }
+
+        let req = UNNotificationRequest(identifier: UUID().uuidString, content: content, trigger: nil)
+        do {
+            try await center.add(req)
+            return true
+        } catch {
+            return false
+        }
+    }
+}