AX Agent 타임라인 기본 노출 축소 및 계획/작업 카드 경량화

- non-debug 기본 로그에서 ToolCall 중간 이벤트를 숨겨 Cowork/Code 타임라인을 결과 중심으로 재정리함
- 계획 카드와 작업 요약 카드, 액션 버튼의 패딩/폰트/폭을 낮춰 transcript 중심 흐름을 강화함
- 권한 작업 카드에서 계획 모드 버튼을 제거해 현재 엔진 정책과 UI를 일치시킴
- README 및 DEVELOPMENT 문서에 2026-04-05 18:49 (KST) 기준 변경 이력과 parity 진척율을 반영함

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

@@ -9411,7 +9411,6 @@ public partial class ChatWindow : Window
         var steps = evt.Steps!;
         var primaryText = TryFindResource("PrimaryText") as Brush ?? Brushes.Black;
         var secondaryText = TryFindResource("SecondaryText") as Brush ?? Brushes.DimGray;
-        var itemBg = TryFindResource("ItemBackground") as Brush ?? BrushFromHex("#FFFFFF");
         var hintBg = TryFindResource("HintBackground") as Brush ?? BrushFromHex("#F8FAFC");
         var borderBrush = TryFindResource("BorderColor") as Brush ?? BrushFromHex("#E2E8F0");
         var accentBrush = TryFindResource("AccentColor") as Brush ?? BrushFromHex("#4B5EFC");
@@ -9421,9 +9420,9 @@ public partial class ChatWindow : Window
             Background = hintBg,
             BorderBrush = borderBrush,
             BorderThickness = new Thickness(1),
-            CornerRadius = new CornerRadius(10),
-            Padding = new Thickness(10, 8, 10, 8),
-            Margin = new Thickness(8, 3, 228, 6),
+            CornerRadius = new CornerRadius(8),
+            Padding = new Thickness(8, 6, 8, 6),
+            Margin = new Thickness(8, 2, 248, 5),
             HorizontalAlignment = HorizontalAlignment.Left,
             MaxWidth = GetMessageMaxWidth(),
         };
@@ -9436,17 +9435,17 @@ public partial class ChatWindow : Window
         {
             Text = "\uE9D5", // plan icon
             FontFamily = new FontFamily("Segoe MDL2 Assets"),
-            FontSize = 9,
+            FontSize = 8,
             Foreground = accentBrush,
-            VerticalAlignment = VerticalAlignment.Center,
-            Margin = new Thickness(0, 0, 4, 0),
+            VerticalAlignment = VerticalAlignment.Center
         });
         header.Children.Add(new TextBlock
         {
-            Text = $"작업 {steps.Count}개 · 0 완료",
-            FontSize = 9.5, FontWeight = FontWeights.SemiBold,
+            Text = $"계획 {steps.Count}단계",
+            FontSize = 9, FontWeight = FontWeights.SemiBold,
             Foreground = secondaryText,
             VerticalAlignment = VerticalAlignment.Center,
+            Margin = new Thickness(4, 0, 0, 0),
         });
         sp.Children.Add(header);
 
@@ -9473,7 +9472,7 @@ public partial class ChatWindow : Window
         _planProgressText = new TextBlock
         {
             Text = "0%",
-            FontSize = 8.5, FontWeight = FontWeights.SemiBold,
+            FontSize = 8, FontWeight = FontWeights.SemiBold,
             Foreground = secondaryText,
             Margin = new Thickness(5, 0, 0, 0),
             VerticalAlignment = VerticalAlignment.Center,
@@ -9496,7 +9495,7 @@ public partial class ChatWindow : Window
             stepRow.Children.Add(new TextBlock
             {
                 Text = "○", // 빈 원 (미완료)
-                FontSize = 9,
+                FontSize = 8.5,
                 Foreground = secondaryText,
                 VerticalAlignment = VerticalAlignment.Center,
                 Margin = new Thickness(0, 0, 4, 0),
@@ -9505,10 +9504,10 @@ public partial class ChatWindow : Window
             stepRow.Children.Add(new TextBlock
             {
                 Text = $"{i + 1}. {steps[i]}",
-                FontSize = 9.5,
+                FontSize = 8.75,
                 Foreground = primaryText,
                 TextWrapping = TextWrapping.Wrap,
-                MaxWidth = Math.Max(320, GetMessageMaxWidth() - 52),
+                MaxWidth = Math.Max(280, GetMessageMaxWidth() - 68),
                 VerticalAlignment = VerticalAlignment.Center,
             });
 
@@ -10397,8 +10396,9 @@ public partial class ChatWindow : Window
             && evt.Type is AgentEventType.Paused or AgentEventType.Resumed)
             return;
 
-        // simple 모드: ToolCall은 건너뜀 (ToolResult만 한 줄로 표시)
-        if (logLevel == "simple" && evt.Type == AgentEventType.ToolCall)
+        // 기본 로그에서는 중간 ToolCall을 숨겨 결과/오류 중심으로 정리합니다.
+        if (!string.Equals(logLevel, "debug", StringComparison.OrdinalIgnoreCase)
+            && evt.Type == AgentEventType.ToolCall)
             return;
 
         // 전체 통계 이벤트는 별도 색상 (보라색 계열)
@@ -10437,7 +10437,7 @@ public partial class ChatWindow : Window
             BorderThickness = new Thickness(0),
             CornerRadius = new CornerRadius(0),
             Padding = new Thickness(0),
-            Margin = new Thickness(12, 1, 12, 1),
+            Margin = new Thickness(12, 0, 12, 1),
             HorizontalAlignment = HorizontalAlignment.Stretch,
         };
         if (!string.IsNullOrWhiteSpace(evt.RunId))
@@ -10456,7 +10456,7 @@ public partial class ChatWindow : Window
         {
             Text = icon,
             FontFamily = new FontFamily("Segoe MDL2 Assets"),
-            FontSize = 8.75,
+            FontSize = 8.25,
             Foreground = accentBrush,
             VerticalAlignment = VerticalAlignment.Center,
             Margin = new Thickness(0, 0, 3, 0),
@@ -10464,7 +10464,7 @@ public partial class ChatWindow : Window
         headerLeft.Children.Add(new TextBlock
         {
             Text = label,
-            FontSize = 8.75,
+            FontSize = 8.25,
             FontWeight = FontWeights.Medium,
             Foreground = secondaryText,
             VerticalAlignment = VerticalAlignment.Center,
@@ -10478,7 +10478,7 @@ public partial class ChatWindow : Window
             headerRight.Children.Add(new TextBlock
             {
                 Text = evt.ElapsedMs < 1000 ? $"{evt.ElapsedMs}ms" : $"{evt.ElapsedMs / 1000.0:F1}s",
-                FontSize = 8,
+                FontSize = 7.5,
                 Foreground = secondaryText,
                 VerticalAlignment = VerticalAlignment.Center,
                 Margin = new Thickness(3, 0, 0, 0),
@@ -10501,7 +10501,7 @@ public partial class ChatWindow : Window
                 Child = new TextBlock
                 {
                     Text = tokenText,
-                    FontSize = 7.5,
+                    FontSize = 7.25,
                     Foreground = secondaryText,
                     FontFamily = new FontFamily("Consolas"),
                 },
@@ -10528,25 +10528,25 @@ public partial class ChatWindow : Window
                 sp.Children.Add(new TextBlock
                 {
                     Text = shortSummary,
-                    FontSize = 8.9,
+                    FontSize = 8.4,
                     Foreground = secondaryText,
                     TextWrapping = TextWrapping.NoWrap,
                     TextTrimming = TextTrimming.CharacterEllipsis,
-                    Margin = new Thickness(12, 1, 0, 0),
+                    Margin = new Thickness(11, 1, 0, 0),
                 });
             }
         }
         // detailed/debug 모드: 실행 줄 아래에 얕은 설명만 표시
         else if (!string.IsNullOrEmpty(evt.Summary))
         {
-            var summaryText = evt.Summary.Length > 120 ? evt.Summary[..120] + "…" : evt.Summary;
+            var summaryText = evt.Summary.Length > 92 ? evt.Summary[..92] + "…" : evt.Summary;
             sp.Children.Add(new TextBlock
             {
                 Text = summaryText,
-                FontSize = 8.9,
+                FontSize = 8.4,
                 Foreground = secondaryText,
                 TextWrapping = TextWrapping.Wrap,
-                Margin = new Thickness(12, 1, 0, 0),
+                Margin = new Thickness(11, 1, 0, 0),
             });
         }
 
@@ -21154,9 +21154,9 @@ private static (string icon, string label, string bgHex, string fgHex) GetDecisi
         {
             Text = kindIcon,
             FontFamily = new FontFamily("Segoe MDL2 Assets"),
-            FontSize = 11,
+            FontSize = 9.5,
             Foreground = kindColor,
-            Margin = new Thickness(0, 0, 6, 0),
+            Margin = new Thickness(0, 0, 4, 0),
             VerticalAlignment = VerticalAlignment.Center,
         });
         headerRow.Children.Add(new TextBlock
@@ -21164,7 +21164,7 @@ private static (string icon, string label, string bgHex, string fgHex) GetDecisi
             Text = active
                 ? $"진행 중 · {task.Title}"
                 : $"{GetTaskStatusLabel(task.Status)} · {task.Title}",
-            FontSize = 11,
+            FontSize = 9.5,
             FontWeight = FontWeights.SemiBold,
             Foreground = active ? primaryText : secondaryText,
             TextWrapping = TextWrapping.Wrap,
@@ -21175,8 +21175,8 @@ private static (string icon, string label, string bgHex, string fgHex) GetDecisi
         {
             taskStack.Children.Add(new TextBlock
             {
-                Text = task.Summary,
-                FontSize = 10.5,
+                Text = TruncateForStatus(task.Summary, 96),
+                FontSize = 8.75,
                 Foreground = secondaryText,
                 TextWrapping = TextWrapping.Wrap,
             });
@@ -21196,12 +21196,12 @@ private static (string icon, string label, string bgHex, string fgHex) GetDecisi
 
         return new Border
         {
-            Background = active ? BrushFromHex("#F8FAFC") : Brushes.White,
+            Background = active ? BrushFromHex("#F8FAFC") : (TryFindResource("LauncherBackground") as Brush ?? Brushes.White),
             BorderBrush = BrushFromHex("#E5E7EB"),
             BorderThickness = new Thickness(1),
-            CornerRadius = new CornerRadius(8),
-            Padding = new Thickness(10, 7, 10, 7),
-            Margin = new Thickness(8, 0, 8, 6),
+            CornerRadius = new CornerRadius(7),
+            Padding = new Thickness(8, 5, 8, 5),
+            Margin = new Thickness(8, 0, 8, 4),
             Child = taskStack
         };
     }
@@ -21217,10 +21217,10 @@ private static (string icon, string label, string bgHex, string fgHex) GetDecisi
         var button = new Button
         {
             Content = label,
-            FontSize = 8.75,
-            MinHeight = 22,
-            Padding = new Thickness(7, 2.5, 7, 2.5),
-            Margin = trailingMargin ? new Thickness(0, 0, 4, 0) : new Thickness(0),
+            FontSize = 8.25,
+            MinHeight = 20,
+            Padding = new Thickness(6, 2, 6, 2),
+            Margin = trailingMargin ? new Thickness(0, 0, 3, 0) : new Thickness(0),
             Background = BrushFromHex(bg),
             BorderBrush = BrushFromHex(border),
             BorderThickness = new Thickness(1),
@@ -21277,7 +21277,6 @@ private static (string icon, string label, string bgHex, string fgHex) GetDecisi
 
             actions.Children.Add(BuildPermissionButton("권한 요청", "#EFF6FF", "#BFDBFE", "#1D4ED8", PermissionModeCatalog.Default));
             actions.Children.Add(BuildPermissionButton("편집 자동 승인", "#ECFDF5", "#BBF7D0", "#166534", PermissionModeCatalog.AcceptEdits));
-            actions.Children.Add(BuildPermissionButton("계획 모드", "#EEF2FF", "#C7D2FE", "#3730A3", PermissionModeCatalog.Plan));
             actions.Children.Add(BuildPermissionButton("권한 건너뛰기", "#FFF7ED", "#FDBA74", "#C2410C", PermissionModeCatalog.BypassPermissions));
             actions.Children.Add(BuildPermissionButton("해제", "#F3F4F6", "#D1D5DB", "#374151", null, margin: false));
             return actions;