Mac: add relay restart button in Debug

apps/macos/Sources/Clawdis/DebugSettings.swift

@@ -108,6 +108,7 @@ struct DebugSettings: View {
             HStack {
                 Button("Restart app") { self.relaunch() }
                 Button("Reveal app in Finder") { self.revealApp() }
+                Button("Restart relay") { self.restartRelay() }
             }
             .buttonStyle(.bordered)
             Spacer()
@@ -142,6 +143,14 @@ struct DebugSettings: View {
         NSWorkspace.shared.activateFileViewerSelecting([url])
     }
 
+    private func restartRelay() {
+        Task { @MainActor in
+            self.relayManager.stop()
+            try? await Task.sleep(nanoseconds: 300_000_000)
+            self.relayManager.setActive(true)
+        }
+    }
+
     private func chooseCatalogFile() {
         let panel = NSOpenPanel()
         panel.title = "Select models.generated.ts"