[Phase46] 대형 파일 분할 리팩터링 2차 — 19개 신규 파셜 파일 생성

## 분할 대상 및 결과

### AgentLoopService.cs (1,334줄 → 846줄)
- AgentLoopService.HtmlReport.cs (151줄): AutoSaveAsHtml, ConvertTextToHtml, EscapeHtml
- AgentLoopService.Verification.cs (349줄): 도구 분류 판별 + RunPostToolVerificationAsync + EmitEvent + CheckDecisionRequired + FormatToolCallSummary

### ChatWindow 분할 (8개 신규 파셜 파일)
- ChatWindow.PlanViewer.cs (474줄): 계획 뷰어 — AddPlanningCard, AddDecisionButtons, CollapseDecisionButtons, ShowPlanButton 등 8개 메서드
- ChatWindow.EventBanner.cs (411줄): AddAgentEventBanner, BuildFileQuickActions
- ChatWindow.TaskDecomposition.cs (1,170줄 → 307줄): RenderSuggestActionChips, BuildFeedbackContext, UpdateProgressBar, BuildDiffView 잔류
- ChatWindow.BottomBar.cs (345줄): BuildBottomBar, BuildCodeBottomBar, ShowLogLevelMenu, ShowLanguageMenu 등
- ChatWindow.MoodMenu.cs (456줄): ShowFormatMenu, ShowMoodMenu, ShowCustomMoodDialog 등
- ChatWindow.CustomPresets.cs (978줄 → 203줄): ShowCustomPresetDialog, SelectTopic 잔류
- ChatWindow.ConversationMenu.cs (255줄): ShowConversationMenu (카테고리/삭제/즐겨찾기 팝업)
- ChatWindow.ConversationTitleEdit.cs (108줄): EnterTitleEditMode

### SettingsViewModel 분할
- SettingsViewModel.LlmProperties.cs (417줄): LLM·에이전트 관련 바인딩 프로퍼티
- SettingsViewModel.Properties.cs (837줄 → 427줄): 기능 토글·테마·스니펫 등 앱 수준 프로퍼티

### TemplateService 분할
- TemplateService.Css.cs (559줄): 11종 CSS 테마 문자열 상수
- TemplateService.cs (734줄 → 179줄): 메서드 로직만 잔류

### PlanViewerWindow 분할
- PlanViewerWindow.StepRenderer.cs (616줄): RenderSteps + SwapSteps + EditStep + 버튼 빌더 9개
- PlanViewerWindow.cs (931줄 → 324줄): Win32/생성자/공개 API 잔류

### App.xaml.cs 분할 (776줄 → 452줄)
- App.Settings.cs (252줄): SetupTrayIcon, OpenSettings, ToggleDockBar, RefreshDockBar, OpenAiChat
- App.Helpers.cs (92줄): LoadAppIcon, IsAutoStartEnabled, SetAutoStart, OnExit

### LlmService.ToolUse.cs 분할 (719줄 → 115줄)
- LlmService.ClaudeTools.cs (180줄): SendClaudeWithToolsAsync, BuildClaudeToolBody
- LlmService.GeminiTools.cs (175줄): SendGeminiWithToolsAsync, BuildGeminiToolBody
- LlmService.OpenAiTools.cs (215줄): SendOpenAiWithToolsAsync, BuildOpenAiToolBody

### SettingsWindow.UI.cs 분할 (802줄 → 310줄)
- SettingsWindow.Storage.cs (167줄): RefreshStorageInfo, BtnStorageCleanup_Click 등
- SettingsWindow.HotkeyUI.cs (127줄): RefreshHotkeyBadges, EnsureHotkeyInCombo, GetKeyName 등
- SettingsWindow.DevMode.cs (90줄): DevModeCheckBox_Checked, UpdateDevModeContentVisibility

## 빌드 결과: 경고 0, 오류 0

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/AxCopilot/App.xaml.cs

@@ -449,328 +449,4 @@ public partial class App : System.Windows.Application
                 ToolTipIcon.Warning);
         });
     }
-
-    private void SetupTrayIcon(PluginHost pluginHost, SettingsService settings)
-    {
-        _trayIcon = new NotifyIcon
-        {
-            Text    = "AX Copilot",
-            Visible = true,
-            Icon    = LoadAppIcon()
-        };
-
-        // ─── WPF 커스텀 트레이 메뉴 구성 ──────────────────────────────────
-        _trayMenu = new Views.TrayMenuWindow();
-        _trayMenu
-            .AddItem("\uE7C5", "AX Commander 호출하기", () =>
-                Dispatcher.Invoke(() => _launcher?.Show()))
-            .AddItem("\uE8BD", "AX Agent 대화하기", () =>
-                Dispatcher.Invoke(() => OpenAiChat()), out var aiTrayItem)
-            .AddItem("\uE8A7", "독 바 표시", () =>
-                Dispatcher.Invoke(() => ToggleDockBar()))
-            .AddSeparator()
-            .AddItem("\uE72C", "플러그인 재로드", () =>
-            {
-                pluginHost.Reload();
-                _trayIcon!.ShowBalloonTip(2000, "AX Copilot", "플러그인이 재로드되었습니다.", ToolTipIcon.None);
-            })
-            .AddItem("\uE838", "로그 폴더 열기", () =>
-            {
-                var logDir = System.IO.Path.Combine(
-                    Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData),
-                    "AxCopilot", "logs");
-                System.Diagnostics.Process.Start(new System.Diagnostics.ProcessStartInfo("explorer.exe", logDir)
-                    { UseShellExecute = true });
-            })
-            .AddItem("\uE9D9", "사용 통계", () =>
-                Dispatcher.Invoke(() => new StatisticsWindow().Show()))
-            .AddItem("\uE736", "사용 가이드 문서보기", () =>
-            {
-                try { Dispatcher.Invoke(() => new Views.GuideViewerWindow().Show()); }
-                catch (Exception ex) { LogService.Error($"사용 가이드 열기 실패: {ex.Message}"); }
-            })
-            .AddSeparator()
-            .AddToggleItem("\uE82F", "Windows 시작 시 자동 실행", IsAutoStartEnabled(),
-                isChecked => SetAutoStart(isChecked), out _, out _)
-            .AddSeparator()
-            .AddItem("\uE713", "설정", () =>
-                Dispatcher.Invoke(OpenSettings))
-            .AddItem("\uE946", "개발 정보", () =>
-                Dispatcher.Invoke(() => new AboutWindow().Show()))
-            .AddItem("\uE711", "종료", () =>
-            {
-                _inputListener?.Dispose();
-                _trayIcon?.Dispose();
-                Shutdown();
-            });
-
-        // AI 기능 활성화 여부에 따라 메뉴 항목 가시성 동적 업데이트
-        _trayMenu.Opening += () =>
-        {
-            aiTrayItem.Visibility = settings.Settings.AiEnabled
-                ? System.Windows.Visibility.Visible
-                : System.Windows.Visibility.Collapsed;
-        };
-
-        // 우클릭 → WPF 메뉴 표시, 좌클릭 → 런처 토글
-        _trayIcon.MouseClick += (_, e) =>
-        {
-            if (e.Button == System.Windows.Forms.MouseButtons.Left)
-                Dispatcher.Invoke(() => _launcher?.Show());
-            else if (e.Button == System.Windows.Forms.MouseButtons.Right)
-                Dispatcher.Invoke(() => _trayMenu?.ShowWithUpdate());
-        };
-
-        // 타이머/알람 풍선 알림 서비스 연결
-        NotificationService.Initialize((title, msg) =>
-        {
-            Dispatcher.Invoke(() =>
-                _trayIcon?.ShowBalloonTip(4000, title, msg, ToolTipIcon.None));
-        });
-    }
-
-    /// <summary>ChatWindow 등 외부에서 설정 창을 여는 공개 메서드.</summary>
-    public void OpenSettingsFromChat() => Dispatcher.Invoke(OpenSettings);
-
-    /// <summary>AX Agent 창 열기 (트레이 메뉴 등에서 호출).</summary>
-    private Views.ChatWindow? _chatWindow;
-
-    /// <summary>
-    /// ChatWindow를 백그라운드에서 미리 생성합니다 (앱 시작 후 저우선순위로 호출).
-    /// 이후 OpenAiChat() 시 창 생성 비용 없이 즉시 Show/Activate만 수행합니다.
-    /// </summary>
-    internal void PrewarmChatWindow()
-    {
-        if (_chatWindow != null || _settings == null) return;
-        _chatWindow = new Views.ChatWindow(_settings);
-    }
-
-    private void OpenAiChat()
-    {
-        if (_settings == null) return;
-        if (_chatWindow == null)
-        {
-            _chatWindow = new Views.ChatWindow(_settings);
-        }
-        _chatWindow.Show();
-        _chatWindow.Activate();
-    }
-
-    public void ToggleDockBar()
-    {
-        if (_dockBar != null && _dockBar.IsVisible)
-        {
-            _dockBar.Hide();
-            return;
-        }
-
-        if (_dockBar == null)
-        {
-            _dockBar = new DockBarWindow();
-            _dockBar.OnQuickSearch = query =>
-            {
-                if (_launcher == null) return;
-                _launcher.Show();
-                _launcher.Activate(); // 독 바 뒤가 아닌 전면에 표시
-                if (!string.IsNullOrEmpty(query))
-                    Dispatcher.BeginInvoke(System.Windows.Threading.DispatcherPriority.Input,
-                        () => _launcher.SetInputText(query));
-            };
-            _dockBar.OnCapture = async () =>
-            {
-                WindowTracker.Capture();
-                if (_captureHandler != null)
-                    await _captureHandler.CaptureDirectAsync("region");
-            };
-            _dockBar.OnOpenAgent = () =>
-            {
-                if (_launcher == null) return;
-                _launcher.Show();
-                Dispatcher.BeginInvoke(System.Windows.Threading.DispatcherPriority.Input,
-                    () => _launcher.SetInputText("!"));
-            };
-        }
-        var launcher = _settings?.Settings.Launcher;
-        var dockItems = launcher?.DockBarItems ?? new() { "launcher", "clipboard", "capture", "agent", "clock", "cpu" };
-        _dockBar.BuildFromSettings(dockItems);
-        _dockBar.OnPositionChanged = (left, top) =>
-        {
-            if (_settings != null)
-            {
-                _settings.Settings.Launcher.DockBarLeft = left;
-                _settings.Settings.Launcher.DockBarTop = top;
-                _settings.Save();
-            }
-        };
-        _dockBar.Show();
-        _dockBar.ApplySettings(
-            launcher?.DockBarOpacity ?? 0.92,
-            launcher?.DockBarLeft ?? -1,
-            launcher?.DockBarTop ?? -1,
-            launcher?.DockBarRainbowGlow ?? false);
-    }
-
-    /// <summary>독 바를 현재 설정으로 즉시 새로고침합니다.</summary>
-    public void RefreshDockBar()
-    {
-        if (_dockBar == null || !_dockBar.IsVisible) return;
-        var launcher = _settings?.Settings.Launcher;
-        var dockItems = launcher?.DockBarItems ?? new() { "launcher", "clipboard", "capture", "agent", "clock", "cpu" };
-        _dockBar.BuildFromSettings(dockItems);
-        _dockBar.ApplySettings(
-            launcher?.DockBarOpacity ?? 0.92,
-            launcher?.DockBarLeft ?? -1,
-            launcher?.DockBarTop ?? -1,
-            launcher?.DockBarRainbowGlow ?? false);
-    }
-
-    private void OpenSettings()
-    {
-        if (_settingsWindow != null && _settingsWindow.IsVisible)
-        {
-            _settingsWindow.Activate();
-            return;
-        }
-
-        if (_settings == null || _launcher == null) return;
-
-        var vm = new ViewModels.SettingsViewModel(_settings);
-
-        // 미리보기 콜백: 현재 편집 중인 색상(vm.ColorRows)으로 런처에 즉시 반영
-        void PreviewCallback(string themeKey)
-        {
-            if (themeKey == "custom")
-            {
-                var tempColors = new AxCopilot.Models.CustomThemeColors();
-                foreach (var row in vm.ColorRows)
-                {
-                    var prop = typeof(AxCopilot.Models.CustomThemeColors).GetProperty(row.Property);
-                    prop?.SetValue(tempColors, row.Hex);
-                }
-                _launcher.ApplyTheme(themeKey, tempColors);
-            }
-            else
-            {
-                _launcher.ApplyTheme(themeKey, _settings.Settings.Launcher.CustomTheme);
-            }
-        }
-
-        // 취소/X 닫기 콜백: 파일에 저장된 원본 설정으로 복원
-        void RevertCallback()
-        {
-            _launcher.ApplyTheme(
-                _settings.Settings.Launcher.Theme ?? "system",
-                _settings.Settings.Launcher.CustomTheme);
-        }
-
-        _settingsWindow = new Views.SettingsWindow(vm, PreviewCallback, RevertCallback)
-        {
-            // 핫키 녹화 중 글로벌 핫키 일시 정지
-            SuspendHotkeyCallback = suspend =>
-            {
-                if (_inputListener != null)
-                    _inputListener.SuspendHotkey = suspend;
-            }
-        };
-
-        // 저장 완료 시 InputListener 핫키 갱신 + 알림 타이머 재시작
-        vm.SaveCompleted += (_, _) =>
-        {
-            if (_inputListener != null && _settings != null)
-            {
-                _inputListener.UpdateHotkey(_settings.Settings.Hotkey);
-                _inputListener.UpdateCaptureHotkey(
-                    _settings.Settings.ScreenCapture.GlobalHotkey,
-                    _settings.Settings.ScreenCapture.GlobalHotkeyEnabled);
-            }
-            _worktimeReminder?.RestartTimer();
-        };
-
-        _settingsWindow.Show();
-    }
-
-    // ─── 자동 시작 레지스트리 헬퍼 ──────────────────────────────────────────
-
-    private static System.Drawing.Icon LoadAppIcon()
-    {
-        // DPI 인식 아이콘 크기 (기본 16 → 고DPI에서 20/24/32)
-        var iconSize = System.Windows.Forms.SystemInformation.SmallIconSize;
-
-        // 1) 파일 시스템에서 로드 (개발 환경)
-        try
-        {
-            var exeDir = System.IO.Path.GetDirectoryName(Environment.ProcessPath)
-                         ?? AppContext.BaseDirectory;
-            var path = System.IO.Path.Combine(exeDir, "Assets", "icon.ico");
-            if (System.IO.File.Exists(path))
-                return new System.Drawing.Icon(path, iconSize);
-        }
-        catch (Exception) { }
-
-        // 2) 내장 리소스에서 로드 (PublishSingleFile 배포)
-        try
-        {
-            var uri = new Uri("pack://application:,,,/Assets/icon.ico");
-            var stream = System.Windows.Application.GetResourceStream(uri)?.Stream;
-            if (stream != null)
-                return new System.Drawing.Icon(stream, iconSize);
-        }
-        catch (Exception) { }
-
-        return System.Drawing.SystemIcons.Application;
-    }
-
-    private const string AutoRunKey  = @"Software\Microsoft\Windows\CurrentVersion\Run";
-    private const string AutoRunName = "AxCopilot";
-
-    private static bool IsAutoStartEnabled()
-    {
-        try
-        {
-            using var key = Registry.CurrentUser.OpenSubKey(AutoRunKey, writable: false);
-            return key?.GetValue(AutoRunName) != null;
-        }
-        catch (Exception) { return false; }
-    }
-
-    private static void SetAutoStart(bool enable)
-    {
-        try
-        {
-            using var key = Registry.CurrentUser.OpenSubKey(AutoRunKey, writable: true);
-            if (key == null) return;
-
-            if (enable)
-            {
-                var exePath = Environment.ProcessPath
-                    ?? System.Diagnostics.Process.GetCurrentProcess().MainModule?.FileName
-                    ?? string.Empty;
-                if (!string.IsNullOrEmpty(exePath))
-                    key.SetValue(AutoRunName, $"\"{exePath}\"");
-            }
-            else
-            {
-                key.DeleteValue(AutoRunName, throwOnMissingValue: false);
-            }
-        }
-        catch (Exception ex)
-        {
-            LogService.Warn($"자동 시작 레지스트리 설정 실패: {ex.Message}");
-        }
-    }
-
-    protected override void OnExit(ExitEventArgs e)
-    {
-        _chatWindow?.ForceClose(); // 미리 생성된 ChatWindow 진짜 닫기
-        _inputListener?.Dispose();
-        _clipboardHistory?.Dispose();
-        _indexService?.Dispose();
-        _sessionTracking?.Dispose();
-        _worktimeReminder?.Dispose();
-        _trayIcon?.Dispose();
-        try { _singleInstanceMutex?.ReleaseMutex(); } catch (Exception) { }
-        _singleInstanceMutex?.Dispose();
-        LogService.Info("=== AX Copilot 종료 ===");
-        base.OnExit(e);
-    }
 }