Fix training speed for walkthrough mode

index.html

@@ -2368,7 +2368,9 @@
                 `;
                 trainBtn.className = 'btn btn-pause';
                 
-                trainInterval = setInterval(trainStep, 100);
+                // Use slower speed in walkthrough mode
+                const trainingSpeed = walkthroughActive ? walkthroughTrainingSpeed : 100;
+                trainInterval = setInterval(trainStep, trainingSpeed);
             } else {
                 trainBtn.innerHTML = `
                     <svg class="icon" fill="currentColor" viewBox="0 0 24 24">