AX Agent 계획 카드와 타임라인 카드 밀도 추가 축소

- 계획 카드의 라운드, 패딩, 헤더, 진행률 텍스트, 단계 행 폰트를 더 줄여 claw-code 쪽 카드 밀도로 정리

- 컨텍스트 압축 pill과 이전 대화 로드 카드도 함께 축소해 본문 대비 존재감을 낮춤

- README와 DEVELOPMENT 문서에 2026-04-05 18:01 (KST) 기준 이력 반영

- 검증: dotnet build src/AxCopilot/AxCopilot.csproj -c Release -v minimal -p:OutputPath=bin\\verify\\ -p:IntermediateOutputPath=obj\\verify\\ (경고 0 / 오류 0)

src/AxCopilot/Views/ChatWindow.xaml.cs

@@ -4161,7 +4161,7 @@ public partial class ChatWindow : Window
             Background = Brushes.Transparent,
             BorderBrush = borderBrush,
             BorderThickness = new Thickness(1),
-            Padding = new Thickness(10, 5, 10, 5),
+            Padding = new Thickness(8, 4, 8, 4),
             Cursor = System.Windows.Input.Cursors.Hand,
             Foreground = primaryText,
             HorizontalAlignment = HorizontalAlignment.Center,
@@ -4176,15 +4176,15 @@ public partial class ChatWindow : Window
                 {
                     Text = "\uE70D",
                     FontFamily = new FontFamily("Segoe MDL2 Assets"),
-                    FontSize = 10,
+                    FontSize = 9,
                     Foreground = secondaryText,
-                    Margin = new Thickness(0, 0, 6, 0),
+                    Margin = new Thickness(0, 0, 5, 0),
                     VerticalAlignment = VerticalAlignment.Center,
                 },
                 new TextBlock
                 {
-                    Text = $"이전 대화 {hiddenCount:N0}개 더 보기",
-                    FontSize = 11.5,
+                    Text = $"이전 대화 {hiddenCount:N0}개",
+                    FontSize = 10,
                     FontWeight = FontWeights.SemiBold,
                     Foreground = primaryText,
                     VerticalAlignment = VerticalAlignment.Center,
@@ -4201,8 +4201,8 @@ public partial class ChatWindow : Window
 
         return new Border
         {
-            CornerRadius = new CornerRadius(16),
-            Margin = new Thickness(0, 2, 0, 12),
+            CornerRadius = new CornerRadius(12),
+            Margin = new Thickness(0, 2, 0, 10),
             Padding = new Thickness(0),
             Background = Brushes.Transparent,
             BorderBrush = Brushes.Transparent,
@@ -4336,8 +4336,8 @@ public partial class ChatWindow : Window
             BorderBrush = borderBrush,
             BorderThickness = new Thickness(1),
             CornerRadius = new CornerRadius(999),
-            Padding = new Thickness(10, 5, 10, 5),
-            Margin = new Thickness(10, 4, 150, 4),
+            Padding = new Thickness(8, 4, 8, 4),
+            Margin = new Thickness(10, 3, 170, 3),
             HorizontalAlignment = HorizontalAlignment.Left,
             Child = new StackPanel
             {
@@ -4348,16 +4348,16 @@ public partial class ChatWindow : Window
                     {
                         Text = "\uE9CE",
                         FontFamily = new FontFamily("Segoe MDL2 Assets"),
-                        FontSize = 10,
+                        FontSize = 9,
                         Foreground = accentBrush,
                         VerticalAlignment = VerticalAlignment.Center,
                     },
                     new TextBlock
                     {
                         Text = summary,
-                        FontSize = 10.5,
+                        FontSize = 9.5,
                         Foreground = secondaryText,
-                        Margin = new Thickness(6, 0, 0, 0),
+                        Margin = new Thickness(5, 0, 0, 0),
                         VerticalAlignment = VerticalAlignment.Center,
                     }
                 }
@@ -9364,9 +9364,9 @@ public partial class ChatWindow : Window
             Background = itemBg,
             BorderBrush = borderBrush,
             BorderThickness = new Thickness(1),
-            CornerRadius = new CornerRadius(18),
-            Padding = new Thickness(16, 14, 16, 14),
-            Margin = new Thickness(20, 6, 170, 10),
+            CornerRadius = new CornerRadius(14),
+            Padding = new Thickness(12, 10, 12, 10),
+            Margin = new Thickness(14, 4, 180, 8),
             HorizontalAlignment = HorizontalAlignment.Left,
             MaxWidth = GetMessageMaxWidth(),
         };
@@ -9374,27 +9374,27 @@ public partial class ChatWindow : Window
         var sp = new StackPanel();
 
         // 헤더
-        var header = new StackPanel { Orientation = Orientation.Horizontal, Margin = new Thickness(0, 0, 0, 6) };
+        var header = new StackPanel { Orientation = Orientation.Horizontal, Margin = new Thickness(0, 0, 0, 5) };
         header.Children.Add(new TextBlock
         {
             Text = "\uE9D5", // plan icon
             FontFamily = new FontFamily("Segoe MDL2 Assets"),
-            FontSize = 12,
+            FontSize = 10.5,
             Foreground = accentBrush,
             VerticalAlignment = VerticalAlignment.Center,
-            Margin = new Thickness(0, 0, 6, 0),
+            Margin = new Thickness(0, 0, 5, 0),
         });
         header.Children.Add(new TextBlock
         {
-            Text = $"{steps.Count}개의 작업 완료 중 0",
-            FontSize = 11.5, FontWeight = FontWeights.SemiBold,
+            Text = $"작업 {steps.Count}개 · 0 완료",
+            FontSize = 10.25, FontWeight = FontWeights.SemiBold,
             Foreground = secondaryText,
             VerticalAlignment = VerticalAlignment.Center,
         });
         sp.Children.Add(header);
 
         // 진행률 바
-        var progressGrid = new Grid { Margin = new Thickness(0, 0, 0, 8) };
+        var progressGrid = new Grid { Margin = new Thickness(0, 0, 0, 6) };
         progressGrid.ColumnDefinitions.Add(new ColumnDefinition { Width = new GridLength(1, GridUnitType.Star) });
         progressGrid.ColumnDefinitions.Add(new ColumnDefinition { Width = GridLength.Auto });
 
@@ -9416,9 +9416,9 @@ public partial class ChatWindow : Window
         _planProgressText = new TextBlock
         {
             Text = "0%",
-            FontSize = 10.5, FontWeight = FontWeights.SemiBold,
+            FontSize = 9.25, FontWeight = FontWeights.SemiBold,
             Foreground = secondaryText,
-            Margin = new Thickness(8, 0, 0, 0),
+            Margin = new Thickness(6, 0, 0, 0),
             VerticalAlignment = VerticalAlignment.Center,
         };
         Grid.SetColumn(_planProgressText, 1);
@@ -9439,16 +9439,16 @@ public partial class ChatWindow : Window
             stepRow.Children.Add(new TextBlock
             {
                 Text = "○", // 빈 원 (미완료)
-                FontSize = 11,
+                FontSize = 10,
                 Foreground = secondaryText,
                 VerticalAlignment = VerticalAlignment.Center,
-                Margin = new Thickness(0, 0, 6, 0),
+                Margin = new Thickness(0, 0, 5, 0),
                 Tag = "status",
             });
             stepRow.Children.Add(new TextBlock
             {
                 Text = $"{i + 1}. {steps[i]}",
-                FontSize = 11.5,
+                FontSize = 10,
                 Foreground = primaryText,
                 TextWrapping = TextWrapping.Wrap,
                 MaxWidth = Math.Max(320, GetMessageMaxWidth() - 60),