AX Agent 라이브 진행 메시지 애니메이션 추가 및 문서 갱신

src/AxCopilot/Views/ChatWindow.AgentEventRendering.cs

@@ -169,6 +169,8 @@ public partial class ChatWindow
             liveWaitingStyle);
         summaryRow.Opacity = 0;
         summaryRow.BeginAnimation(UIElement.OpacityProperty, new DoubleAnimation(0, 1, TimeSpan.FromMilliseconds(140)));
+        if (liveWaitingStyle)
+            ApplyLiveWaitingPulse(summaryRow);
         stack.Children.Add(summaryRow);
 
         var body = (eventSummaryText ?? string.Empty).Trim();
@@ -212,6 +214,45 @@ public partial class ChatWindow
         MessagePanel.Children.Add(stack);
     }
 
+    private static void ApplyLiveWaitingPulse(Border summaryRow)
+    {
+        if (summaryRow.Child is not Grid grid || grid.Children.Count == 0 || grid.Children[0] is not StackPanel panel)
+            return;
+        if (panel.Children.Count == 0 || panel.Children[0] is not TextBlock marker)
+            return;
+
+        marker.Text = "✶";
+        marker.RenderTransformOrigin = new Point(0.5, 0.5);
+        marker.RenderTransform = new ScaleTransform(1, 1);
+
+        var pulse = new DoubleAnimation
+        {
+            From = 0.42,
+            To = 1.0,
+            Duration = TimeSpan.FromMilliseconds(780),
+            AutoReverse = true,
+            RepeatBehavior = RepeatBehavior.Forever,
+            EasingFunction = new QuadraticEase { EasingMode = EasingMode.EaseInOut },
+        };
+        marker.BeginAnimation(UIElement.OpacityProperty, pulse);
+
+        if (marker.RenderTransform is ScaleTransform scale)
+        {
+            var scaleAnimX = new DoubleAnimation
+            {
+                From = 0.92,
+                To = 1.08,
+                Duration = TimeSpan.FromMilliseconds(780),
+                AutoReverse = true,
+                RepeatBehavior = RepeatBehavior.Forever,
+                EasingFunction = new QuadraticEase { EasingMode = EasingMode.EaseInOut },
+            };
+            var scaleAnimY = scaleAnimX.Clone();
+            scale.BeginAnimation(ScaleTransform.ScaleXProperty, scaleAnimX);
+            scale.BeginAnimation(ScaleTransform.ScaleYProperty, scaleAnimY);
+        }
+    }
+
     private string BuildProcessFeedMetaText(AgentEvent evt)
     {
         var parts = new List<string>();