Fix systray crash on macOS due to dual NSApplication run loops

internal/tray/tray.go

@@ -13,10 +13,11 @@ type Callbacks struct {
 	OnQuit        func()            // called when user clicks Quit
 }
 
-// Run starts the systray on the main thread. It blocks until quit.
-// Must be called from the main goroutine on macOS.
-func Run(cb Callbacks) {
-	systray.Run(func() {
+// Register sets up the systray without starting its own event loop.
+// This must be used when another framework (like Wails) already owns
+// the main thread and NSApplication run loop on macOS.
+func Register(cb Callbacks) {
+	systray.Register(func() {
 		systray.SetTemplateIcon(iconData, iconData)
 		systray.SetTitle("")
 		systray.SetTooltip("Egressor — egress monitor")

internal/tray/tray_stub.go

@@ -9,8 +9,8 @@ type Callbacks struct {
 	OnQuit        func()
 }
 
-// Run is a no-op on unsupported platforms.
-func Run(_ Callbacks) {}
+// Register is a no-op on unsupported platforms.
+func Register(_ Callbacks) {}
 
 // Available returns false when the systray is not compiled in.
 func Available() bool {

internal/ui/app.go

@@ -53,9 +53,11 @@ func (a *App) Startup(ctx context.Context) {
 		slog.Error("failed to start proxy", "err", err)
 	}
 
-	// Start system tray icon (macOS menu bar)
+	// Set up system tray icon (macOS menu bar).
+	// Uses Register instead of Run to avoid starting a second NSApplication
+	// run loop — Wails already owns the main thread.
 	if tray.Available() {
-		go tray.Run(tray.Callbacks{
+		tray.Register(tray.Callbacks{
 			OnPauseToggle: func(paused bool) {
 				a.engine.SetBypassed(paused)
 				if paused {

internal/ui/frontend/src/App.tsx

@@ -75,7 +75,7 @@ function App() {
             )}
           </>
         ) : (
-          <div className="w-full max-w-2xl overflow-auto">
+          <div className="w-full overflow-auto">
             <PolicyEditor
               patterns={policy.patterns}
               onAdd={policy.addPattern}