Added xp-overlay feature

xp_server/bin/xp_nix.dart

@@ -185,8 +185,15 @@ Requirements:
         break;
       case 'test':
         if (parts.length > 1) {
-          final level = int.tryParse(parts[1]) ?? 1;
-          _monitor.testTheme(level);
+          final levelOrCommand = parts[1].toLowerCase();
+          if (levelOrCommand == 'overlay') {
+            _testOverlay(parts.length > 2 ? int.tryParse(parts[2]) : null);
+          } else {
+            final level = int.tryParse(levelOrCommand) ?? 1;
+            _monitor.testTheme(level);
+          }
+        } else {
+          print('Usage: test [level|overlay] - Specify a level number or "overlay" to test XP overlay');
         }
         break;
       case 'restore':
@@ -203,6 +210,7 @@ Requirements:
 Available commands:
 - stats: Show current productivity stats
 - test [level]: Test theme for specific level
+- test overlay [value]: Test XP overlay at cursor position
 - restore: Restore desktop backup
 - refresh: Refresh base config from current system config
 - build: Build Flutter dashboard and copy to static files
@@ -246,6 +254,32 @@ void _handleBuildCommand() async {
   }
 }
 
+/// Test the XP overlay with an optional XP value
+Future<void> _testOverlay(int? xpValue) async {
+  print('🧪 Testing XP overlay system...');
+  final windowManager = WindowManagerDetector.instance.detect();
+  
+  if (windowManager == WindowManager.unknown) {
+    print('❌ No supported window manager detected');
+    return;
+  }
+  
+  final overlayManager = _monitor.cursorOverlayManager;
+  if (overlayManager == null) {
+    print('❌ Overlay manager not initialized');
+    return;
+  }
+  
+  final available = await overlayManager.isAvailable();
+  if (!available) {
+    print('❌ Overlay system is not available. Check logs for details.');
+    return;
+  }
+  
+  print('✅ Overlay system is available, showing test overlay...');
+  await overlayManager.testOverlay(testXP: xpValue ?? 42);
+}
+
 Future<void> _quit() async {
   _monitor.stop();
   await _dashboardServer.stop();