AX Agent 상태선 렌더 구조 분리 및 문서 갱신

- ChatWindow.StatusPresentation.cs로 UpdateStatusBar, StartStatusAnimation, StopStatusAnimation을 이동해 runtime 상태 이벤트와 상태선 표현 책임을 메인 창 코드에서 분리함

- ChatWindow.xaml.cs는 transcript 오케스트레이션 중심으로 더 정리했고, claw-code 기준 status/footer 품질 개선을 이어가기 쉬운 구조로 개선함

- README.md와 docs/DEVELOPMENT.md에 2026-04-06 08:39 (KST) 기준 변경 이력을 반영함

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

src/AxCopilot/Views/ChatWindow.StatusPresentation.cs

@@ -1,11 +1,15 @@
 using System.Windows;
 using System.Windows.Media;
+using System.Windows.Media.Animation;
 using AxCopilot.Services;
+using AxCopilot.Services.Agent;
 
 namespace AxCopilot.Views;
 
 public partial class ChatWindow
 {
+    private Storyboard? _statusSpinStoryboard;
+
     private AppStateService.OperationalStatusPresentationState BuildOperationalStatusPresentation()
     {
         var hasLiveRuntimeActivity = !string.Equals(_activeTab, "Chat", StringComparison.OrdinalIgnoreCase)
@@ -169,4 +173,112 @@ public partial class ChatWindow
         StatusTokens.Visibility = Visibility.Visible;
         RefreshContextUsageVisual();
     }
+    private void UpdateStatusBar(AgentEvent evt)
+    {
+        var toolLabel = evt.ToolName switch
+        {
+            "file_read" or "document_read" => "파일 읽기",
+            "file_write" => "파일 쓰기",
+            "file_edit" => "파일 수정",
+            "html_create" => "HTML 생성",
+            "xlsx_create" => "Excel 생성",
+            "docx_create" => "Word 생성",
+            "csv_create" => "CSV 생성",
+            "md_create" => "Markdown 생성",
+            "folder_map" => "폴더 탐색",
+            "glob" => "파일 검색",
+            "grep" => "내용 검색",
+            "process" => "명령 실행",
+            _ => evt.ToolName,
+        };
+
+        var isDebugLogLevel = string.Equals(_settings.Settings.Llm.AgentLogLevel, "debug", StringComparison.OrdinalIgnoreCase);
+
+        switch (evt.Type)
+        {
+            case AgentEventType.Thinking:
+                SetStatus("생각 중...", spinning: true);
+                break;
+            case AgentEventType.Planning:
+                SetStatus($"계획 수립 중 — {evt.StepTotal}단계", spinning: true);
+                break;
+            case AgentEventType.PermissionRequest:
+                SetStatus($"권한 확인 중: {toolLabel}", spinning: false);
+                break;
+            case AgentEventType.PermissionGranted:
+                SetStatus($"권한 승인됨: {toolLabel}", spinning: false);
+                break;
+            case AgentEventType.PermissionDenied:
+                SetStatus($"권한 거부됨: {toolLabel}", spinning: false);
+                StopStatusAnimation();
+                break;
+            case AgentEventType.Decision:
+                SetStatus(GetDecisionStatusText(evt.Summary), spinning: IsDecisionPending(evt.Summary));
+                break;
+            case AgentEventType.ToolCall:
+                if (!isDebugLogLevel)
+                    break;
+                SetStatus($"{toolLabel} 실행 중...", spinning: true);
+                break;
+            case AgentEventType.ToolResult:
+                SetStatus(evt.Success ? $"{toolLabel} 완료" : $"{toolLabel} 실패", spinning: false);
+                break;
+            case AgentEventType.StepStart:
+                SetStatus($"[{evt.StepCurrent}/{evt.StepTotal}] {TruncateForStatus(evt.Summary)}", spinning: true);
+                break;
+            case AgentEventType.StepDone:
+                SetStatus($"[{evt.StepCurrent}/{evt.StepTotal}] 단계 완료", spinning: true);
+                break;
+            case AgentEventType.SkillCall:
+                if (!isDebugLogLevel)
+                    break;
+                SetStatus($"스킬 실행 중: {TruncateForStatus(evt.Summary)}", spinning: true);
+                break;
+            case AgentEventType.Complete:
+                SetStatus("작업 완료", spinning: false);
+                StopStatusAnimation();
+                break;
+            case AgentEventType.Error:
+                SetStatus("오류 발생", spinning: false);
+                StopStatusAnimation();
+                break;
+            case AgentEventType.Paused:
+                if (!isDebugLogLevel)
+                    break;
+                SetStatus("⏸ 일시정지", spinning: false);
+                break;
+            case AgentEventType.Resumed:
+                if (!isDebugLogLevel)
+                    break;
+                SetStatus("▶ 재개됨", spinning: true);
+                break;
+        }
+    }
+
+    private void StartStatusAnimation()
+    {
+        if (_statusSpinStoryboard != null)
+            return;
+
+        var anim = new DoubleAnimation
+        {
+            From = 0,
+            To = 360,
+            Duration = TimeSpan.FromSeconds(2),
+            RepeatBehavior = RepeatBehavior.Forever,
+        };
+
+        _statusSpinStoryboard = new Storyboard();
+        Storyboard.SetTarget(anim, StatusDiamond);
+        Storyboard.SetTargetProperty(anim,
+            new PropertyPath("(UIElement.RenderTransform).(RotateTransform.Angle)"));
+        _statusSpinStoryboard.Children.Add(anim);
+        _statusSpinStoryboard.Begin();
+    }
+
+    private void StopStatusAnimation()
+    {
+        _statusSpinStoryboard?.Stop();
+        _statusSpinStoryboard = null;
+    }
 }