의견 요청과 계획 승인 렌더를 분리해 메시지 타입 구조를 정리한다

- ChatWindow.InlineInteractions를 UserAskPresentation과 PlanApprovalPresentation으로 분리해 사용자 질문 카드와 계획 승인 흐름의 책임을 나눔

- 메시지 타입 renderer 분리 계획의 다음 단계로 ChatWindow.xaml.cs와 mixed inline interaction partial의 결합도를 낮춤

- README, DEVELOPMENT, claw-code parity plan 문서를 2026-04-06 09:44 (KST) 기준으로 갱신함

- 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.PlanApprovalPresentation.cs

@@ -0,0 +1,183 @@
+using System.Linq;
+using System.Windows;
+using System.Windows.Controls;
+using System.Windows.Input;
+using System.Windows.Media;
+
+using AxCopilot.Services.Agent;
+
+namespace AxCopilot.Views;
+
+public partial class ChatWindow
+{
+    private Func<string, List<string>, Task<string?>> CreatePlanDecisionCallback()
+    {
+        return async (planSummary, options) =>
+        {
+            var tcs = new TaskCompletionSource<string?>();
+            var steps = TaskDecomposer.ExtractSteps(planSummary);
+
+            await Dispatcher.InvokeAsync(() =>
+            {
+                _pendingPlanSummary = planSummary;
+                _pendingPlanSteps = steps.ToList();
+                EnsurePlanViewerWindow();
+                _planViewerWindow?.LoadPlan(planSummary, steps, tcs);
+                ShowPlanButton(true);
+                AddDecisionButtons(tcs, options);
+            });
+
+            var completed = await Task.WhenAny(tcs.Task, Task.Delay(TimeSpan.FromMinutes(5)));
+            if (completed != tcs.Task)
+            {
+                await Dispatcher.InvokeAsync(() =>
+                {
+                    _planViewerWindow?.Hide();
+                    ResetPendingPlanPresentation();
+                });
+                return "취소";
+            }
+
+            var result = await tcs.Task;
+            var agentDecision = result;
+            if (result == null)
+            {
+                agentDecision = _planViewerWindow?.BuildApprovedDecisionPayload(AgentLoopService.ApprovedPlanDecisionPrefix);
+            }
+            else if (!string.Equals(result, "취소", StringComparison.OrdinalIgnoreCase)
+                  && !string.Equals(result, "확인", StringComparison.OrdinalIgnoreCase)
+                  && !string.IsNullOrWhiteSpace(result))
+            {
+                agentDecision = $"수정 요청: {result.Trim()}";
+            }
+
+            if (result == null)
+            {
+                await Dispatcher.InvokeAsync(() =>
+                {
+                    _planViewerWindow?.SwitchToExecutionMode();
+                });
+            }
+            else
+            {
+                await Dispatcher.InvokeAsync(() =>
+                {
+                    _planViewerWindow?.Hide();
+                    ResetPendingPlanPresentation();
+                });
+            }
+
+            return agentDecision;
+        };
+    }
+
+    private void EnsurePlanViewerWindow()
+    {
+        if (_planViewerWindow != null && IsWindowAlive(_planViewerWindow))
+            return;
+
+        _planViewerWindow = new PlanViewerWindow(this);
+        _planViewerWindow.Closing += (_, e) =>
+        {
+            e.Cancel = true;
+            _planViewerWindow.Hide();
+        };
+    }
+
+    private void ShowPlanButton(bool show)
+    {
+        if (!show)
+        {
+            for (int i = MoodIconPanel.Children.Count - 1; i >= 0; i--)
+            {
+                if (MoodIconPanel.Children[i] is Border b && b.Tag?.ToString() == "PlanBtn")
+                {
+                    if (i > 0 && MoodIconPanel.Children[i - 1] is Border sep && sep.Tag?.ToString() == "PlanSep")
+                        MoodIconPanel.Children.RemoveAt(i - 1);
+                    if (i < MoodIconPanel.Children.Count)
+                        MoodIconPanel.Children.RemoveAt(Math.Min(i, MoodIconPanel.Children.Count - 1));
+                    break;
+                }
+            }
+            return;
+        }
+
+        foreach (var child in MoodIconPanel.Children)
+        {
+            if (child is Border b && b.Tag?.ToString() == "PlanBtn")
+                return;
+        }
+
+        var separator = new Border
+        {
+            Width = 1,
+            Height = 18,
+            Background = TryFindResource("SeparatorColor") as Brush ?? Brushes.Gray,
+            Margin = new Thickness(4, 0, 4, 0),
+            VerticalAlignment = VerticalAlignment.Center,
+            Tag = "PlanSep",
+        };
+        MoodIconPanel.Children.Add(separator);
+
+        var planBtn = CreateFolderBarButton("\uE9D2", "계획", "실행 계획 보기", "#10B981");
+        planBtn.Tag = "PlanBtn";
+        planBtn.MouseLeftButtonUp += (_, e) =>
+        {
+            e.Handled = true;
+            if (string.IsNullOrWhiteSpace(_pendingPlanSummary) && _pendingPlanSteps.Count == 0)
+                return;
+
+            EnsurePlanViewerWindow();
+            if (_planViewerWindow != null && IsWindowAlive(_planViewerWindow))
+            {
+                if (string.IsNullOrWhiteSpace(_planViewerWindow.PlanText)
+                    || _planViewerWindow.PlanText != (_pendingPlanSummary ?? string.Empty)
+                    || !_planViewerWindow.Steps.SequenceEqual(_pendingPlanSteps))
+                {
+                    _planViewerWindow.LoadPlanPreview(_pendingPlanSummary ?? "", _pendingPlanSteps);
+                }
+                _planViewerWindow.Show();
+                _planViewerWindow.Activate();
+            }
+        };
+        MoodIconPanel.Children.Add(planBtn);
+    }
+
+    private void UpdatePlanViewerStep(AgentEvent evt)
+    {
+        if (_planViewerWindow == null || !IsWindowAlive(_planViewerWindow))
+            return;
+
+        if (evt.StepCurrent > 0)
+            _planViewerWindow.UpdateCurrentStep(evt.StepCurrent - 1);
+    }
+
+    private void CompletePlanViewer()
+    {
+        if (_planViewerWindow != null && IsWindowAlive(_planViewerWindow))
+            _planViewerWindow.MarkComplete();
+        ResetPendingPlanPresentation();
+    }
+
+    private void ResetPendingPlanPresentation()
+    {
+        _pendingPlanSummary = null;
+        _pendingPlanSteps.Clear();
+        ShowPlanButton(false);
+    }
+
+    private static bool IsWindowAlive(Window? w)
+    {
+        if (w == null)
+            return false;
+        try
+        {
+            var _ = w.IsVisible;
+            return true;
+        }
+        catch
+        {
+            return false;
+        }
+    }
+}