AX Agent 상단 헤더와 대화 목록 메타를 claw-code 쪽으로 정리

- 상단 탭 그룹과 사이드바 토글 버튼을 더 얇은 세그먼트형 UI로 조정

- 좌측 대화 목록의 실행 메타와 편집 아이콘을 더 약하게 줄여 제목 중심의 목록 밀도로 재정렬

- 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

@@ -3291,10 +3291,10 @@ public partial class ChatWindow : Window
                 Text = _appState.ActiveTasks.Count > 0
                     ? $"진행 중 {_appState.ActiveTasks.Count}"
                     : "진행 중",
-                FontSize = 8,
+                FontSize = 7.75,
                 FontWeight = FontWeights.Medium,
                 Foreground = BrushFromHex("#4F46E5"),
-                Margin = new Thickness(0, 2, 0, 0),
+                Margin = new Thickness(0, 1.5, 0, 0),
             });
         }
         if (item.AgentRunCount > 0)
@@ -3304,11 +3304,11 @@ public partial class ChatWindow : Window
                 Text = item.FailedAgentRunCount > 0
                     ? $"실패 {item.FailedAgentRunCount} · {TruncateForStatus(item.LastAgentRunSummary, 26)}"
                     : $"실행 {item.AgentRunCount} · {TruncateForStatus(item.LastAgentRunSummary, 28)}",
-                FontSize = 8.25,
+                FontSize = 7.9,
                 Foreground = item.FailedAgentRunCount > 0
                     ? BrushFromHex("#B91C1C")
                     : (TryFindResource("SecondaryText") as Brush ?? Brushes.Gray),
-                Margin = new Thickness(0, 2, 0, 0),
+                Margin = new Thickness(0, 1.5, 0, 0),
                 TextTrimming = TextTrimming.CharacterEllipsis
             };
             if (!string.IsNullOrWhiteSpace(item.LastAgentRunSummary))
@@ -3329,7 +3329,7 @@ public partial class ChatWindow : Window
             {
                 Text = "\uE70F", // Edit
                 FontFamily = new FontFamily("Segoe MDL2 Assets"),
-                FontSize = 8.5,
+                FontSize = 8,
                 Foreground = (TryFindResource("SecondaryText") as Brush ?? Brushes.Gray)
             },
             Background = Brushes.Transparent,
@@ -3337,10 +3337,10 @@ public partial class ChatWindow : Window
             Cursor = Cursors.Hand,
             VerticalAlignment = VerticalAlignment.Center,
             Visibility = Visibility.Collapsed,
-            Width = 22,
-            Height = 22,
+            Width = 20,
+            Height = 20,
             Padding = new Thickness(0),
-            Opacity = 0.85,
+            Opacity = 0.72,
             ToolTip = _activeTab == "Cowork" ? "작업 유형" : "대화 주제 변경"
         };
         var capturedId = item.Id;