Update WaitForTrayReady for cross-platform support

Modified WaitForTrayReady to handle both Linux (AppIndicator) and macOS (AppKit) tray icon readiness. Updated comments to clarify platform-specific event processing and ensure tray icon visibility before screenshots.

Author: ReenigneArcher

tests/unit/test_tray.cpp

@@ -130,13 +130,13 @@ class TrayTest: public BaseTest {
     trayRunning = false;
   }
 
-  // Process pending GTK events to allow AppIndicator to register
+  // Process pending events to allow tray icon to appear
   // Call this ONLY before screenshots to ensure the icon is visible
   void WaitForTrayReady() {
-#if defined(TRAY_APPINDICATOR)
-    // On Linux with AppIndicator, process GTK events to allow D-Bus registration
-    // This ensures the icon actually appears in the system tray before screenshots
-    // Use shorter iterations to avoid interfering with event loop state
+#if defined(TRAY_APPINDICATOR) || defined(TRAY_APPKIT)
+    // On Linux: process GTK events to allow AppIndicator D-Bus registration
+    // On macOS: give the status item time to appear in the menu bar
+    // Both use non-blocking event processing with delays (500ms total)
     for (int i = 0; i < 100; i++) {
       tray_loop(0);  // Non-blocking - process pending events
       std::this_thread::sleep_for(std::chrono::milliseconds(5));