refactor(macos): dedupe UI, pairing, and runtime helpers

apps/macos/Sources/OpenClaw/SimpleFileWatcherOwner.swift

@@ -0,0 +1,15 @@
+import Foundation
+
+protocol SimpleFileWatcherOwner: AnyObject {
+    var watcher: SimpleFileWatcher { get }
+}
+
+extension SimpleFileWatcherOwner {
+    func start() {
+        self.watcher.start()
+    }
+
+    func stop() {
+        self.watcher.stop()
+    }
+}