[Phase L5-4] 앱 세션 스냅 (session) 구현

AppSettings.Models.cs (수정):
- AppSession 클래스 신규: Name/Description/Apps/CreatedAt
- SessionApp 클래스 신규: Path/Arguments/Label/SnapPosition/DelayMs
- 스냅 위치 14종: full/left/right/tl~br/center/third-l/c/r/two3-l/r/none

AppSettings.cs (수정):
- [JsonPropertyName("appSessions")] AppSessions 리스트 추가

SessionHandler.cs (신규, ~160줄):
- prefix="session", GetItemsAsync: 목록+필터, new/edit/del 서브커맨드
- ExecuteAsync: 편집기 열기 또는 LaunchSessionAsync 실행
- LaunchSessionAsync: Process.Start → 창 핸들 대기(최대 6초 폴링) → ApplySnapToWindow
- ApplySnapToWindow: P/Invoke(SetWindowPos, ShowWindow, MonitorFromWindow, GetMonitorInfo) + 14종 스냅 좌표 계산

SessionEditorWindow.xaml (신규, ~200줄):
- 타이틀바 + 세션명·설명 TextBox + 앱 목록 영역 + 하단 버튼 바
- SnapPickerPopup: PlacementTarget 코드에서 동적 지정, ContentControl에 StackPanel 14개 옵션

SessionEditorWindow.xaml.cs (신규, ~240줄):
- AppRowUi 내부 모델: Path/Label/SnapPosition/Args/DelayMs + SnapLabelRef 갱신
- BuildRowGrid(): 경로TextBox + 라벨TextBox + 스냅Border(팝업) + 삭제Border
- BtnAddApp: OpenFileDialog → 자동 라벨(파일명)
- BtnSave: 유효 행 필터 → AppSession 구성 → 기존 교체 또는 신규 추가 → Save()

App.xaml.cs (수정):
- Phase L5-4 섹션에 SessionHandler 등록

docs/LAUNCHER_ROADMAP.md (수정):
- L5-4 항목 ✅ 완료 표시 + 구현 상세 기록

빌드: 경고 0, 오류 0

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

docs/LAUNCHER_ROADMAP.md

@@ -132,7 +132,7 @@
 | L5-1 | **항목별 전용 핫키** ✅ | 앱·URL·폴더에 `Ctrl+Alt+숫자` 등 글로벌 단축키 직접 할당. `hotkey` 프리픽스로 관리. `HotkeyAssignment` 모델 + `InputListener` 확장 + 설정창 "전용 핫키" 탭 | 높음 |
 | L5-2 | **OCR 화면 텍스트 추출** ✅ | `ocr` 프리픽스 + F4 글로벌 단축키. RegionSelectWindow 재사용, Windows.Media.Ocr 로컬 엔진. 결과 → 클립보드 복사 + 런처 입력창 자동 채움 | 높음 |
 | L5-3 | **QuickLook 인라인 편집** ✅ | F3 미리보기 → Ctrl+E 편집 모드 토글. 텍스트/코드 전체 읽기(300줄 제한 없음). Ctrl+S 저장, ● 수정 마커, Esc 취소 확인, 저장 후 미리보기 새로고침 | 중간 |
-| L5-4 | **앱 세션 스냅** | 여러 앱을 지정 레이아웃으로 한번에 열기. `snap 세션이름` → 등록된 앱 목록을 각 레이아웃에 배치 | 중간 |
+| L5-4 | **앱 세션 스냅** ✅ | `session` 프리픽스. `AppSession/SessionApp` 모델 추가 + `AppSettings.AppSessions` 저장. `SessionHandler`: 목록·실행·new/edit/del 서브커맨드. `SessionEditorWindow`: 세션 이름·설명·앱 행(경로+라벨+스냅 팝업 14종+삭제) 인라인 편집. 실행 시 Process.Start → 창 핸들 대기(6초) → ApplySnapToWindow(P/Invoke SetWindowPos+ShowWindow) | 중간 |
 | L5-5 | **배치 파일 이름 변경** ✅ | `batchren` 프리픽스로 BatchRenameWindow 오픈. 변수 패턴(`{name}`, `{n:3}`, `{date:format}`, `{ext}`) + 정규식 모드(`/old/new/`). 드래그 앤 드롭·폴더/파일 추가, DataGrid 실시간 미리보기, 충돌 감지(배경 붉은 강조), 확장자 유지 토글, 시작 번호 지정, 적용 후 엔트리 갱신 | 중간 |
 | L5-6 | **자동화 스케줄러** | `sched` 프리픽스로 시간·앱 기반 트리거 등록. "매일 09:00 = 크롬 열기", "캐치 앱 실행 시 = 알림" | 낮음 |
 

src/AxCopilot/App.xaml.cs

@@ -182,6 +182,8 @@ public partial class App : System.Windows.Application
         commandResolver.RegisterHandler(new HotkeyHandler(settings));
         // Phase L5-2: OCR 화면 텍스트 추출 (prefix=ocr)
         commandResolver.RegisterHandler(new OcrHandler());
+        // Phase L5-4: 앱 세션 스냅 (prefix=session)
+        commandResolver.RegisterHandler(new SessionHandler(settings));
         // Phase L5-5: 배치 파일 이름변경 (prefix=batchren)
         commandResolver.RegisterHandler(new BatchRenameHandler());
 

src/AxCopilot/Handlers/SessionHandler.cs

@@ -0,0 +1,301 @@
+using System.IO;
+using System.Runtime.InteropServices;
+using AxCopilot.SDK;
+using AxCopilot.Services;
+using AxCopilot.Themes;
+
+namespace AxCopilot.Handlers;
+
+/// <summary>
+/// L5-4: 앱 세션 스냅 핸들러. "session" 프리픽스로 사용합니다.
+///
+/// 예: session                    → 저장된 세션 목록
+///     session 개발환경            → 해당 세션 실행 (앱 + 스냅 레이아웃 적용)
+///     session new 이름            → 새 세션 편집기 열기
+///     session edit 이름           → 기존 세션 편집기 열기
+///     session del 이름            → 세션 삭제
+///
+/// 세션 = [앱 경로 + 스냅 위치] 목록. 한 번에 모든 앱을 지정 레이아웃으로 실행합니다.
+/// </summary>
+public class SessionHandler : IActionHandler
+{
+    private readonly SettingsService _settings;
+
+    public SessionHandler(SettingsService settings) { _settings = settings; }
+
+    public string? Prefix => "session";
+
+    public PluginMetadata Metadata => new(
+        "AppSession",
+        "앱 세션 스냅 — session",
+        "1.0",
+        "AX");
+
+    // ─── 항목 목록 ──────────────────────────────────────────────────────────
+    public Task<IEnumerable<LauncherItem>> GetItemsAsync(string query, CancellationToken ct)
+    {
+        var q     = query.Trim();
+        var parts = q.Split(' ', 2, StringSplitOptions.TrimEntries);
+        var cmd   = parts.Length > 0 ? parts[0].ToLowerInvariant() : "";
+
+        // "new [이름]" — 새 세션 만들기
+        if (cmd == "new")
+        {
+            var name = parts.Length > 1 && !string.IsNullOrWhiteSpace(parts[1]) ? parts[1] : "새 세션";
+            return Task.FromResult<IEnumerable<LauncherItem>>(new[]
+            {
+                new LauncherItem($"'{name}' 세션 만들기",
+                    "편집기에서 앱 목록과 스냅 레이아웃을 설정합니다",
+                    null, $"__new__{name}", Symbol: "\uE710")
+            });
+        }
+
+        // "edit 이름" — 기존 세션 편집
+        if (cmd == "edit" && parts.Length > 1)
+        {
+            return Task.FromResult<IEnumerable<LauncherItem>>(new[]
+            {
+                new LauncherItem($"'{parts[1]}' 세션 편집",
+                    "편집기 열기",
+                    null, $"__edit__{parts[1]}", Symbol: "\uE70F")
+            });
+        }
+
+        // "del 이름" or "delete 이름" — 세션 삭제
+        if ((cmd == "del" || cmd == "delete") && parts.Length > 1)
+        {
+            return Task.FromResult<IEnumerable<LauncherItem>>(new[]
+            {
+                new LauncherItem($"'{parts[1]}' 세션 삭제",
+                    "Enter로 삭제 확인 (되돌릴 수 없습니다)",
+                    null, $"__del__{parts[1]}", Symbol: Symbols.Delete)
+            });
+        }
+
+        // 세션 목록 (필터 적용)
+        var sessions = _settings.Settings.AppSessions;
+        var filter   = q.ToLowerInvariant();
+        var items    = new List<LauncherItem>();
+
+        foreach (var s in sessions)
+        {
+            if (!string.IsNullOrEmpty(filter) &&
+                !s.Name.Contains(filter, StringComparison.OrdinalIgnoreCase) &&
+                !s.Description.Contains(filter, StringComparison.OrdinalIgnoreCase))
+                continue;
+
+            var appNames = string.Join(", ",
+                s.Apps.Take(3).Select(a =>
+                    string.IsNullOrEmpty(a.Label)
+                        ? Path.GetFileNameWithoutExtension(a.Path)
+                        : a.Label));
+
+            items.Add(new LauncherItem(
+                s.Name,
+                $"{s.Apps.Count}개 앱  ·  {appNames}",
+                null, s,
+                Symbol: "\uE8A1")); // 창 레이아웃 아이콘
+        }
+
+        if (items.Count == 0 && string.IsNullOrEmpty(filter))
+        {
+            items.Add(new LauncherItem(
+                "저장된 세션 없음",
+                "'session new 이름'으로 앱 세션을 만드세요",
+                null, null,
+                Symbol: Symbols.Info));
+        }
+
+        // 새 세션 만들기 (항상 표시)
+        items.Add(new LauncherItem(
+            "새 세션 만들기",
+            "session new [이름]  ·  앱 목록 + 스냅 레이아웃 지정",
+            null, "__new__새 세션",
+            Symbol: "\uE710"));
+
+        return Task.FromResult<IEnumerable<LauncherItem>>(items);
+    }
+
+    // ─── 실행 ─────────────────────────────────────────────────────────────
+    public async Task ExecuteAsync(LauncherItem item, CancellationToken ct)
+    {
+        if (item.Data is string s)
+        {
+            if (s.StartsWith("__new__"))
+            {
+                var name = s["__new__".Length..];
+                System.Windows.Application.Current.Dispatcher.Invoke(() =>
+                {
+                    var win = new Views.SessionEditorWindow(null, _settings);
+                    win.InitialName = name;
+                    win.Show();
+                });
+                return;
+            }
+
+            if (s.StartsWith("__edit__"))
+            {
+                var name    = s["__edit__".Length..];
+                var session = _settings.Settings.AppSessions
+                    .FirstOrDefault(x => x.Name.Equals(name, StringComparison.OrdinalIgnoreCase));
+                System.Windows.Application.Current.Dispatcher.Invoke(() =>
+                {
+                    var win = new Views.SessionEditorWindow(session, _settings);
+                    win.Show();
+                });
+                return;
+            }
+
+            if (s.StartsWith("__del__"))
+            {
+                var name    = s["__del__".Length..];
+                var session = _settings.Settings.AppSessions
+                    .FirstOrDefault(x => x.Name.Equals(name, StringComparison.OrdinalIgnoreCase));
+                if (session != null)
+                {
+                    _settings.Settings.AppSessions.Remove(session);
+                    _settings.Save();
+                    NotificationService.Notify("AX Copilot", $"세션 '{name}' 삭제됨");
+                }
+                return;
+            }
+        }
+
+        if (item.Data is Models.AppSession appSession)
+            await LaunchSessionAsync(appSession, ct);
+    }
+
+    // ─── 세션 실행 로직 ───────────────────────────────────────────────────
+    private static async Task LaunchSessionAsync(Models.AppSession session, CancellationToken ct)
+    {
+        NotificationService.Notify("AX Copilot", $"'{session.Name}' 세션 시작...");
+        LogService.Info($"세션 실행 시작: {session.Name} ({session.Apps.Count}개 앱)");
+
+        int launched = 0, failed = 0;
+
+        foreach (var app in session.Apps)
+        {
+            ct.ThrowIfCancellationRequested();
+
+            if (app.DelayMs > 0)
+                await Task.Delay(app.DelayMs, ct);
+
+            if (string.IsNullOrWhiteSpace(app.Path)) continue;
+
+            System.Diagnostics.Process? proc = null;
+            try
+            {
+                proc = System.Diagnostics.Process.Start(new System.Diagnostics.ProcessStartInfo
+                {
+                    FileName        = app.Path,
+                    Arguments       = app.Arguments ?? "",
+                    UseShellExecute = true
+                });
+                launched++;
+            }
+            catch (Exception ex)
+            {
+                LogService.Warn($"세션 앱 실행 실패: {app.Path} — {ex.Message}");
+                failed++;
+                continue;
+            }
+
+            // 스냅 위치 없거나 none → 그냥 실행
+            if (proc == null || string.IsNullOrEmpty(app.SnapPosition) || app.SnapPosition == "none")
+                continue;
+
+            // 창이 나타날 때까지 대기 (최대 6초)
+            var hWnd    = IntPtr.Zero;
+            var deadline = DateTime.UtcNow.AddSeconds(6);
+            while (DateTime.UtcNow < deadline)
+            {
+                ct.ThrowIfCancellationRequested();
+                try { proc.Refresh(); } catch { break; }
+                hWnd = proc.MainWindowHandle;
+                if (hWnd != IntPtr.Zero) break;
+                await Task.Delay(200, ct);
+            }
+
+            if (hWnd == IntPtr.Zero)
+            {
+                LogService.Warn($"세션: 창 핸들 획득 실패 ({app.Path})");
+                continue;
+            }
+
+            // 창이 완전히 렌더링될 시간 허용
+            await Task.Delay(250, ct);
+            ApplySnapToWindow(hWnd, app.SnapPosition);
+        }
+
+        var msg = failed > 0
+            ? $"'{session.Name}' 실행 완료 ({launched}개 성공, {failed}개 실패)"
+            : $"'{session.Name}' 실행 완료 ({launched}개 앱)";
+        NotificationService.Notify("AX Copilot", msg);
+        LogService.Info($"세션 실행 완료: {msg}");
+    }
+
+    // ─── 스냅 적용 (SnapHandler와 동일한 좌표 계산) ──────────────────────
+    private static void ApplySnapToWindow(IntPtr hwnd, string snapKey)
+    {
+        if (snapKey == "full")
+        {
+            ShowWindow(hwnd, SW_MAXIMIZE);
+            return;
+        }
+
+        var hMonitor = MonitorFromWindow(hwnd, MONITOR_DEFAULTTONEAREST);
+        var mi = new MONITORINFO { cbSize = Marshal.SizeOf<MONITORINFO>() };
+        if (!GetMonitorInfo(hMonitor, ref mi)) return;
+
+        var w  = mi.rcWork;
+        int mw = w.right  - w.left;
+        int mh = w.bottom - w.top;
+        int mx = w.left;
+        int my = w.top;
+
+        var (x, y, cw, ch) = snapKey switch
+        {
+            "left"    => (mx,              my,               mw / 2,        mh),
+            "right"   => (mx + mw / 2,    my,               mw / 2,        mh),
+            "top"     => (mx,              my,               mw,            mh / 2),
+            "bottom"  => (mx,              my + mh / 2,      mw,            mh / 2),
+            "tl"      => (mx,              my,               mw / 2,        mh / 2),
+            "tr"      => (mx + mw / 2,    my,               mw / 2,        mh / 2),
+            "bl"      => (mx,              my + mh / 2,      mw / 2,        mh / 2),
+            "br"      => (mx + mw / 2,    my + mh / 2,      mw / 2,        mh / 2),
+            "third-l" => (mx,              my,               mw / 3,        mh),
+            "third-c" => (mx + mw / 3,    my,               mw / 3,        mh),
+            "third-r" => (mx + mw * 2 / 3,my,               mw / 3,        mh),
+            "two3-l"  => (mx,              my,               mw * 2 / 3,    mh),
+            "two3-r"  => (mx + mw / 3,    my,               mw * 2 / 3,    mh),
+            "center"  => (mx + mw / 10,   my + mh / 10,     mw * 8 / 10,   mh * 8 / 10),
+            _         => (mx,              my,               mw,            mh)
+        };
+
+        ShowWindow(hwnd, SW_RESTORE);
+        SetWindowPos(hwnd, IntPtr.Zero, x, y, cw, ch, SWP_SHOWWINDOW | SWP_NOZORDER);
+    }
+
+    // ─── P/Invoke ─────────────────────────────────────────────────────────
+    private const uint SWP_SHOWWINDOW = 0x0040;
+    private const uint SWP_NOZORDER   = 0x0004;
+    private const uint MONITOR_DEFAULTTONEAREST = 0x00000002;
+    private const int  SW_RESTORE  = 9;
+    private const int  SW_MAXIMIZE = 3;
+
+    [StructLayout(LayoutKind.Sequential)]
+    private struct RECT { public int left, top, right, bottom; }
+
+    [StructLayout(LayoutKind.Sequential)]
+    private struct MONITORINFO
+    {
+        public int cbSize;
+        public RECT rcMonitor, rcWork;
+        public uint dwFlags;
+    }
+
+    [DllImport("user32.dll")] private static extern bool SetWindowPos(IntPtr hWnd, IntPtr hWndInsertAfter, int x, int y, int cx, int cy, uint uFlags);
+    [DllImport("user32.dll")] private static extern bool ShowWindow(IntPtr hWnd, int nCmdShow);
+    [DllImport("user32.dll")] private static extern IntPtr MonitorFromWindow(IntPtr hwnd, uint dwFlags);
+    [DllImport("user32.dll")] private static extern bool GetMonitorInfo(IntPtr hMonitor, ref MONITORINFO lpmi);
+}

src/AxCopilot/Models/AppSettings.Models.cs

@@ -262,6 +262,54 @@ public class HotkeyAssignment
     public string Type { get; set; } = "app";
 }
 
+// ─── 앱 세션 스냅 ────────────────────────────────────────────────────────────────
+
+/// <summary>
+/// 앱 세션: 여러 앱을 지정 레이아웃으로 한번에 실행하는 세트.
+/// session 핸들러로 저장/로드/실행합니다.
+/// </summary>
+public class AppSession
+{
+    [JsonPropertyName("name")]
+    public string Name { get; set; } = "";
+
+    [JsonPropertyName("description")]
+    public string Description { get; set; } = "";
+
+    [JsonPropertyName("apps")]
+    public List<SessionApp> Apps { get; set; } = new();
+
+    [JsonPropertyName("createdAt")]
+    public DateTime CreatedAt { get; set; } = DateTime.Now;
+}
+
+/// <summary>
+/// 세션 내 개별 앱 항목. 실행 경로·인자·스냅 위치를 지정합니다.
+/// </summary>
+public class SessionApp
+{
+    [JsonPropertyName("path")]
+    public string Path { get; set; } = "";
+
+    [JsonPropertyName("args")]
+    public string Arguments { get; set; } = "";
+
+    /// <summary>표시 이름. 비어 있으면 파일명을 사용합니다.</summary>
+    [JsonPropertyName("label")]
+    public string Label { get; set; } = "";
+
+    /// <summary>
+    /// 스냅 위치. left / right / tl / tr / bl / br / full / center /
+    /// third-l / third-c / third-r / two3-l / two3-r / none
+    /// </summary>
+    [JsonPropertyName("snap")]
+    public string SnapPosition { get; set; } = "full";
+
+    /// <summary>이 앱을 실행하기 전 대기 시간(ms). 기본값 0.</summary>
+    [JsonPropertyName("delayMs")]
+    public int DelayMs { get; set; } = 0;
+}
+
 // ─── 잠금 해제 알림 설정 ───────────────────────────────────────────────────────
 
 public class ReminderSettings

src/AxCopilot/Models/AppSettings.cs

@@ -112,6 +112,12 @@ public class AppSettings
     [JsonPropertyName("customHotkeys")]
     public List<HotkeyAssignment> CustomHotkeys { get; set; } = new();
 
+    /// <summary>
+    /// 앱 세션 목록. session 핸들러로 여러 앱을 지정 레이아웃에 한번에 실행합니다.
+    /// </summary>
+    [JsonPropertyName("appSessions")]
+    public List<AppSession> AppSessions { get; set; } = new();
+
     [JsonPropertyName("llm")]
     public LlmSettings Llm { get; set; } = new();
 }

src/AxCopilot/Views/SessionEditorWindow.xaml

@@ -0,0 +1,251 @@
+<Window x:Class="AxCopilot.Views.SessionEditorWindow"
+        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+        Title="AX Commander — 세션 편집"
+        Width="640" Height="540"
+        MinWidth="500" MinHeight="400"
+        WindowStyle="None" AllowsTransparency="True"
+        Background="Transparent"
+        WindowStartupLocation="CenterScreen"
+        ResizeMode="CanResizeWithGrip"
+        ShowInTaskbar="False">
+
+    <Border Background="{DynamicResource LauncherBackground}" CornerRadius="12"
+            BorderBrush="{DynamicResource BorderColor}" BorderThickness="1"
+            Margin="6">
+        <Border.Effect>
+            <DropShadowEffect BlurRadius="22" ShadowDepth="4" Opacity="0.32" Color="Black" Direction="270"/>
+        </Border.Effect>
+        <Grid>
+            <Grid.RowDefinitions>
+                <RowDefinition Height="44"/>    <!-- 타이틀바 -->
+                <RowDefinition Height="Auto"/>  <!-- 세션 정보 -->
+                <RowDefinition Height="*"/>     <!-- 앱 목록 -->
+                <RowDefinition Height="Auto"/>  <!-- 하단 버튼 -->
+            </Grid.RowDefinitions>
+
+            <!-- ─── 타이틀바 ─────────────────────────────────────────────── -->
+            <Border Grid.Row="0" CornerRadius="12,12,0,0"
+                    Background="{DynamicResource ItemBackground}"
+                    MouseLeftButtonDown="TitleBar_MouseDown">
+                <Grid Margin="14,0,8,0">
+                    <StackPanel Orientation="Horizontal" VerticalAlignment="Center">
+                        <TextBlock Text="&#xE8A1;"
+                                   FontFamily="Segoe MDL2 Assets" FontSize="15"
+                                   Foreground="{DynamicResource AccentColor}"
+                                   VerticalAlignment="Center" Margin="0,1,10,0"/>
+                        <TextBlock Text="세션 편집"
+                                   FontSize="13" FontWeight="SemiBold"
+                                   Foreground="{DynamicResource PrimaryText}"
+                                   VerticalAlignment="Center"/>
+                    </StackPanel>
+                    <Border HorizontalAlignment="Right" VerticalAlignment="Center"
+                            CornerRadius="4" Padding="8,4" Cursor="Hand"
+                            MouseLeftButtonUp="BtnClose_Click">
+                        <Border.Style>
+                            <Style TargetType="Border">
+                                <Setter Property="Background" Value="Transparent"/>
+                                <Style.Triggers>
+                                    <Trigger Property="IsMouseOver" Value="True">
+                                        <Setter Property="Background" Value="#40C05050"/>
+                                    </Trigger>
+                                </Style.Triggers>
+                            </Style>
+                        </Border.Style>
+                        <TextBlock Text="&#xE711;" FontFamily="Segoe MDL2 Assets" FontSize="13"
+                                   Foreground="{DynamicResource SecondaryText}"/>
+                    </Border>
+                </Grid>
+            </Border>
+
+            <!-- ─── 세션 이름·설명 ───────────────────────────────────────── -->
+            <Border Grid.Row="1"
+                    Background="{DynamicResource ItemBackground}"
+                    BorderBrush="{DynamicResource BorderColor}" BorderThickness="0,1,0,1"
+                    Padding="14,10">
+                <Grid>
+                    <Grid.ColumnDefinitions>
+                        <ColumnDefinition Width="*"/>
+                        <ColumnDefinition Width="12"/>
+                        <ColumnDefinition Width="*"/>
+                    </Grid.ColumnDefinitions>
+                    <Grid.RowDefinitions>
+                        <RowDefinition Height="Auto"/>
+                        <RowDefinition Height="4"/>
+                        <RowDefinition Height="Auto"/>
+                    </Grid.RowDefinitions>
+
+                    <TextBlock Grid.Row="0" Grid.Column="0"
+                               Text="세션 이름" FontSize="10" FontWeight="Medium"
+                               Foreground="{DynamicResource SecondaryText}" Margin="0,0,0,3"/>
+                    <TextBlock Grid.Row="0" Grid.Column="2"
+                               Text="설명 (선택)" FontSize="10" FontWeight="Medium"
+                               Foreground="{DynamicResource SecondaryText}" Margin="0,0,0,3"/>
+
+                    <TextBox Grid.Row="2" Grid.Column="0"
+                             x:Name="NameBox"
+                             FontSize="13" FontWeight="SemiBold"
+                             Foreground="{DynamicResource PrimaryText}"
+                             Background="{DynamicResource LauncherBackground}"
+                             BorderBrush="{DynamicResource BorderColor}"
+                             BorderThickness="1"
+                             Padding="8,5"
+                             VerticalContentAlignment="Center"/>
+
+                    <TextBox Grid.Row="2" Grid.Column="2"
+                             x:Name="DescBox"
+                             FontSize="12"
+                             Foreground="{DynamicResource PrimaryText}"
+                             Background="{DynamicResource LauncherBackground}"
+                             BorderBrush="{DynamicResource BorderColor}"
+                             BorderThickness="1"
+                             Padding="8,5"
+                             VerticalContentAlignment="Center"/>
+                </Grid>
+            </Border>
+
+            <!-- ─── 앱 목록 ──────────────────────────────────────────────── -->
+            <Grid Grid.Row="2">
+                <!-- 컬럼 헤더 -->
+                <Grid.RowDefinitions>
+                    <RowDefinition Height="30"/>
+                    <RowDefinition Height="*"/>
+                </Grid.RowDefinitions>
+
+                <Border Grid.Row="0"
+                        Background="{DynamicResource ItemBackground}"
+                        BorderBrush="{DynamicResource BorderColor}" BorderThickness="0,0,0,1"
+                        Padding="14,0">
+                    <Grid>
+                        <Grid.ColumnDefinitions>
+                            <ColumnDefinition Width="*"/>       <!-- 경로 -->
+                            <ColumnDefinition Width="100"/>     <!-- 라벨 -->
+                            <ColumnDefinition Width="108"/>     <!-- 스냅 -->
+                            <ColumnDefinition Width="30"/>      <!-- 삭제 -->
+                        </Grid.ColumnDefinitions>
+                        <TextBlock Grid.Column="0" Text="앱 경로" FontSize="10" FontWeight="Medium"
+                                   Foreground="{DynamicResource SecondaryText}" VerticalAlignment="Center"/>
+                        <TextBlock Grid.Column="1" Text="라벨" FontSize="10" FontWeight="Medium"
+                                   Foreground="{DynamicResource SecondaryText}" VerticalAlignment="Center" Margin="8,0,0,0"/>
+                        <TextBlock Grid.Column="2" Text="스냅 위치" FontSize="10" FontWeight="Medium"
+                                   Foreground="{DynamicResource SecondaryText}" VerticalAlignment="Center" Margin="8,0,0,0"/>
+                    </Grid>
+                </Border>
+
+                <!-- 앱 행 목록 -->
+                <ScrollViewer Grid.Row="1"
+                              VerticalScrollBarVisibility="Auto"
+                              HorizontalScrollBarVisibility="Disabled">
+                    <StackPanel x:Name="AppListPanel" Margin="0,0,0,4">
+                        <!-- 행은 코드에서 동적으로 생성 -->
+                    </StackPanel>
+                </ScrollViewer>
+
+                <!-- 빈 상태 -->
+                <StackPanel x:Name="EmptyState"
+                            Grid.Row="1"
+                            VerticalAlignment="Center"
+                            HorizontalAlignment="Center"
+                            Visibility="Visible">
+                    <TextBlock Text="&#xE8A1;"
+                               FontFamily="Segoe MDL2 Assets" FontSize="40"
+                               Foreground="{DynamicResource SecondaryText}"
+                               HorizontalAlignment="Center" Opacity="0.3"/>
+                    <TextBlock Text="앱을 추가하세요"
+                               FontSize="13"
+                               Foreground="{DynamicResource SecondaryText}"
+                               HorizontalAlignment="Center"
+                               Margin="0,10,0,0" Opacity="0.5"/>
+                </StackPanel>
+            </Grid>
+
+            <!-- ─── 스냅 선택 팝업 (공유, 코드에서 위치 지정) ──────────────
+                 PlacementTarget은 코드에서 동적으로 설정합니다.              -->
+            <Popup x:Name="SnapPickerPopup"
+                   Placement="Bottom"
+                   AllowsTransparency="True"
+                   StaysOpen="False">
+                <Border Background="{DynamicResource ItemBackground}"
+                        BorderBrush="{DynamicResource BorderColor}" BorderThickness="1"
+                        CornerRadius="8" Padding="8,6"
+                        MinWidth="160">
+                    <Border.Effect>
+                        <DropShadowEffect BlurRadius="12" ShadowDepth="2" Opacity="0.3" Color="Black" Direction="270"/>
+                    </Border.Effect>
+                    <ContentControl x:Name="SnapOptionsList"/>
+                </Border>
+            </Popup>
+
+            <!-- ─── 하단 버튼 바 ─────────────────────────────────────────── -->
+            <Border Grid.Row="3" CornerRadius="0,0,12,12"
+                    Background="{DynamicResource ItemBackground}"
+                    BorderBrush="{DynamicResource BorderColor}" BorderThickness="0,1,0,0"
+                    Padding="12,8">
+                <Grid>
+                    <!-- 좌측: 앱 추가 버튼 -->
+                    <Border HorizontalAlignment="Left" VerticalAlignment="Center"
+                            CornerRadius="4" Padding="12,5" Cursor="Hand"
+                            MouseLeftButtonUp="BtnAddApp_Click">
+                        <Border.Style>
+                            <Style TargetType="Border">
+                                <Setter Property="Background" Value="#18FFFFFF"/>
+                                <Style.Triggers>
+                                    <Trigger Property="IsMouseOver" Value="True">
+                                        <Setter Property="Background" Value="#28FFFFFF"/>
+                                    </Trigger>
+                                </Style.Triggers>
+                            </Style>
+                        </Border.Style>
+                        <StackPanel Orientation="Horizontal">
+                            <TextBlock Text="&#xE710;" FontFamily="Segoe MDL2 Assets" FontSize="12"
+                                       Foreground="#5CB85C" VerticalAlignment="Center" Margin="0,0,6,0"/>
+                            <TextBlock Text="앱 추가" FontSize="12"
+                                       Foreground="{DynamicResource PrimaryText}"/>
+                        </StackPanel>
+                    </Border>
+
+                    <!-- 우측: 취소 + 저장 -->
+                    <StackPanel Orientation="Horizontal" HorizontalAlignment="Right" VerticalAlignment="Center">
+                        <Border CornerRadius="4" Padding="14,5" Cursor="Hand" Margin="0,0,8,0"
+                                MouseLeftButtonUp="BtnCancel_Click">
+                            <Border.Style>
+                                <Style TargetType="Border">
+                                    <Setter Property="Background" Value="#18FFFFFF"/>
+                                    <Style.Triggers>
+                                        <Trigger Property="IsMouseOver" Value="True">
+                                            <Setter Property="Background" Value="#28FFFFFF"/>
+                                        </Trigger>
+                                    </Style.Triggers>
+                                </Style>
+                            </Border.Style>
+                            <TextBlock Text="취소" FontSize="12"
+                                       Foreground="{DynamicResource SecondaryText}"/>
+                        </Border>
+
+                        <Border x:Name="BtnSave"
+                                CornerRadius="4" Padding="16,5" Cursor="Hand"
+                                Background="{DynamicResource AccentColor}"
+                                MouseLeftButtonUp="BtnSave_Click">
+                            <Border.Style>
+                                <Style TargetType="Border">
+                                    <Setter Property="Background" Value="{DynamicResource AccentColor}"/>
+                                    <Style.Triggers>
+                                        <Trigger Property="IsMouseOver" Value="True">
+                                            <Setter Property="Opacity" Value="0.85"/>
+                                        </Trigger>
+                                    </Style.Triggers>
+                                </Style>
+                            </Border.Style>
+                            <StackPanel Orientation="Horizontal">
+                                <TextBlock Text="&#xE74E;" FontFamily="Segoe MDL2 Assets" FontSize="12"
+                                           Foreground="White" VerticalAlignment="Center" Margin="0,0,6,0"/>
+                                <TextBlock Text="저장" FontSize="12" FontWeight="SemiBold"
+                                           Foreground="White"/>
+                            </StackPanel>
+                        </Border>
+                    </StackPanel>
+                </Grid>
+            </Border>
+        </Grid>
+    </Border>
+</Window>

src/AxCopilot/Views/SessionEditorWindow.xaml.cs

@@ -0,0 +1,386 @@
+using System.IO;
+using System.Windows;
+using System.Windows.Controls;
+using System.Windows.Input;
+using System.Windows.Media;
+using AxCopilot.Models;
+using AxCopilot.Services;
+
+namespace AxCopilot.Views;
+
+/// <summary>
+/// L5-4: 앱 세션 편집기.
+/// 세션 이름, 앱 목록(경로 + 라벨 + 스냅 위치)을 편집하여 저장합니다.
+/// </summary>
+public partial class SessionEditorWindow : Window
+{
+    private readonly SettingsService _settings;
+    private readonly AppSession?     _original;   // 편집 모드 원본 (새 세션이면 null)
+    private readonly List<AppRowUi>  _rows = new();
+
+    // 스냅 팝업 대상 행
+    private AppRowUi? _snapTargetRow;
+
+    // 사용 가능한 스냅 위치 목록 (키 → 표시명)
+    private static readonly (string Key, string Label)[] SnapOptions =
+    [
+        ("full",    "전체화면"),
+        ("left",    "왼쪽 절반"),
+        ("right",   "오른쪽 절반"),
+        ("tl",      "좌상단 1/4"),
+        ("tr",      "우상단 1/4"),
+        ("bl",      "좌하단 1/4"),
+        ("br",      "우하단 1/4"),
+        ("center",  "중앙 80%"),
+        ("third-l", "좌측 1/3"),
+        ("third-c", "중앙 1/3"),
+        ("third-r", "우측 1/3"),
+        ("two3-l",  "좌측 2/3"),
+        ("two3-r",  "우측 2/3"),
+        ("none",    "스냅 없음"),
+    ];
+
+    // ──────────────────────────────────────────────────────────────────────
+    /// <summary>
+    /// 세션 편집기를 엽니다.
+    /// </summary>
+    /// <param name="session">편집할 기존 세션. null이면 새로 만들기 모드.</param>
+    /// <param name="settings">설정 서비스.</param>
+    public SessionEditorWindow(AppSession? session, SettingsService settings)
+    {
+        InitializeComponent();
+        _settings = settings;
+        _original = session;
+
+        BuildSnapPopup();
+        LoadSession(session);
+    }
+
+    /// <summary>새 세션 모드일 때 기본 이름을 설정합니다.</summary>
+    public string InitialName
+    {
+        set { if (_original == null) NameBox.Text = value; }
+    }
+
+    // ─── 초기화 ───────────────────────────────────────────────────────────
+    private void LoadSession(AppSession? session)
+    {
+        if (session == null)
+        {
+            NameBox.Text = "새 세션";
+            DescBox.Text = "";
+        }
+        else
+        {
+            NameBox.Text = session.Name;
+            DescBox.Text = session.Description;
+            foreach (var app in session.Apps)
+                AddRow(app.Path, app.Label, app.SnapPosition, app.Arguments, app.DelayMs);
+        }
+
+        RefreshEmptyState();
+    }
+
+    private void BuildSnapPopup()
+    {
+        var panel = new StackPanel { Margin = new Thickness(0) };
+
+        foreach (var (key, label) in SnapOptions)
+        {
+            var keyCapture = key;
+            var border = new Border
+            {
+                CornerRadius = new CornerRadius(4),
+                Padding      = new Thickness(10, 5, 10, 5),
+                Cursor       = Cursors.Hand
+            };
+
+            border.MouseEnter += (_, _) =>
+                border.Background = new SolidColorBrush(Color.FromArgb(0x28, 0xFF, 0xFF, 0xFF));
+            border.MouseLeave += (_, _) =>
+                border.Background = Brushes.Transparent;
+
+            var stack = new StackPanel { Orientation = Orientation.Horizontal };
+            stack.Children.Add(new TextBlock
+            {
+                Text            = keyCapture,
+                FontFamily      = new FontFamily("Cascadia Code, Consolas"),
+                FontSize        = 11,
+                Foreground      = TryFindResource("AccentColor") as Brush ?? Brushes.DodgerBlue,
+                VerticalAlignment = VerticalAlignment.Center,
+                MinWidth        = 68,
+            });
+            stack.Children.Add(new TextBlock
+            {
+                Text            = label,
+                FontSize        = 11,
+                Foreground      = TryFindResource("SecondaryText") as Brush ?? Brushes.Gray,
+                VerticalAlignment = VerticalAlignment.Center,
+            });
+            border.Child = stack;
+
+            border.MouseLeftButtonUp += (_, _) =>
+            {
+                if (_snapTargetRow != null)
+                {
+                    _snapTargetRow.SnapPosition = keyCapture;
+                    _snapTargetRow.UpdateSnapLabel();
+                }
+                SnapPickerPopup.IsOpen = false;
+            };
+
+            panel.Children.Add(border);
+        }
+
+        SnapOptionsList.Content = panel;
+    }
+
+    // ─── 앱 행 추가 ───────────────────────────────────────────────────────
+    private void AddRow(string path = "", string label = "", string snap = "full",
+                        string args = "", int delayMs = 0)
+    {
+        var row = new AppRowUi(path, label, snap, args, delayMs);
+        _rows.Add(row);
+
+        var rowGrid = BuildRowGrid(row);
+        AppListPanel.Children.Add(rowGrid);
+        RefreshEmptyState();
+    }
+
+    private Grid BuildRowGrid(AppRowUi row)
+    {
+        var grid = new Grid { Margin = new Thickness(14, 2, 4, 2) };
+        grid.ColumnDefinitions.Add(new ColumnDefinition { Width = new GridLength(1, GridUnitType.Star) });
+        grid.ColumnDefinitions.Add(new ColumnDefinition { Width = new GridLength(100) });
+        grid.ColumnDefinitions.Add(new ColumnDefinition { Width = new GridLength(108) });
+        grid.ColumnDefinitions.Add(new ColumnDefinition { Width = new GridLength(30) });
+
+        // 경로 TextBox
+        var pathBox = new TextBox
+        {
+            Text                = row.Path,
+            FontSize            = 11,
+            Foreground          = TryFindResource("PrimaryText") as Brush ?? Brushes.White,
+            Background          = TryFindResource("LauncherBackground") as Brush ?? Brushes.Black,
+            BorderBrush         = TryFindResource("BorderColor") as Brush ?? Brushes.Gray,
+            BorderThickness     = new Thickness(1),
+            Padding             = new Thickness(6, 4, 6, 4),
+            VerticalContentAlignment = VerticalAlignment.Center,
+            ToolTip             = "앱 실행 파일 경로",
+            Margin              = new Thickness(0, 0, 4, 0),
+        };
+        pathBox.TextChanged += (_, _) => row.Path = pathBox.Text;
+        Grid.SetColumn(pathBox, 0);
+
+        // 라벨 TextBox
+        var labelBox = new TextBox
+        {
+            Text                = row.Label,
+            FontSize            = 11,
+            Foreground          = TryFindResource("SecondaryText") as Brush ?? Brushes.Gray,
+            Background          = TryFindResource("LauncherBackground") as Brush ?? Brushes.Black,
+            BorderBrush         = TryFindResource("BorderColor") as Brush ?? Brushes.Gray,
+            BorderThickness     = new Thickness(1),
+            Padding             = new Thickness(6, 4, 6, 4),
+            VerticalContentAlignment = VerticalAlignment.Center,
+            ToolTip             = "표시 이름 (선택)",
+            Margin              = new Thickness(0, 0, 4, 0),
+        };
+        labelBox.TextChanged += (_, _) => row.Label = labelBox.Text;
+        Grid.SetColumn(labelBox, 1);
+
+        // 스냅 선택 Border (클릭 시 팝업)
+        var snapBtn = new Border
+        {
+            CornerRadius = new CornerRadius(4),
+            BorderBrush  = TryFindResource("BorderColor") as Brush ?? Brushes.Gray,
+            BorderThickness = new Thickness(1),
+            Padding      = new Thickness(6, 4, 6, 4),
+            Cursor       = Cursors.Hand,
+            Margin       = new Thickness(0, 0, 4, 0),
+            ToolTip      = "스냅 위치 선택",
+        };
+        snapBtn.MouseEnter += (_, _) =>
+            snapBtn.Background = new SolidColorBrush(Color.FromArgb(0x18, 0xFF, 0xFF, 0xFF));
+        snapBtn.MouseLeave += (_, _) =>
+            snapBtn.Background = Brushes.Transparent;
+
+        var snapLabel = new TextBlock
+        {
+            FontFamily = new FontFamily("Cascadia Code, Consolas"),
+            FontSize   = 10,
+            Foreground = TryFindResource("AccentColor") as Brush ?? Brushes.DodgerBlue,
+            VerticalAlignment = VerticalAlignment.Center,
+            TextTrimming = TextTrimming.CharacterEllipsis,
+        };
+        snapBtn.Child = snapLabel;
+
+        // AppRowUi가 라벨 TextBlock을 참조할 수 있도록 저장
+        row.SnapLabelRef    = snapLabel;
+        row.SnapButtonRef   = snapBtn;
+        row.UpdateSnapLabel();
+
+        snapBtn.MouseLeftButtonUp += (sender, e) =>
+        {
+            _snapTargetRow             = row;
+            SnapPickerPopup.PlacementTarget = (FrameworkElement)sender;
+            SnapPickerPopup.IsOpen     = true;
+            e.Handled = true;
+        };
+        Grid.SetColumn(snapBtn, 2);
+
+        // 삭제 버튼
+        var delBtn = new Border
+        {
+            Width        = 24,
+            Height       = 24,
+            CornerRadius = new CornerRadius(4),
+            Cursor       = Cursors.Hand,
+            ToolTip      = "이 앱 제거",
+            VerticalAlignment = VerticalAlignment.Center,
+            HorizontalAlignment = HorizontalAlignment.Center,
+        };
+        delBtn.MouseEnter += (_, _) =>
+            delBtn.Background = new SolidColorBrush(Color.FromArgb(0x30, 0xEF, 0x53, 0x50));
+        delBtn.MouseLeave += (_, _) =>
+            delBtn.Background = Brushes.Transparent;
+
+        var delIcon = new TextBlock
+        {
+            Text           = "\uE74D",
+            FontFamily     = new FontFamily("Segoe MDL2 Assets"),
+            FontSize       = 12,
+            Foreground     = new SolidColorBrush(Color.FromRgb(0xEF, 0x53, 0x50)),
+            HorizontalAlignment = HorizontalAlignment.Center,
+            VerticalAlignment   = VerticalAlignment.Center,
+        };
+        delBtn.Child = delIcon;
+
+        delBtn.MouseLeftButtonUp += (_, _) =>
+        {
+            _rows.Remove(row);
+            AppListPanel.Children.Remove(grid);
+            RefreshEmptyState();
+        };
+        Grid.SetColumn(delBtn, 3);
+
+        grid.Children.Add(pathBox);
+        grid.Children.Add(labelBox);
+        grid.Children.Add(snapBtn);
+        grid.Children.Add(delBtn);
+
+        return grid;
+    }
+
+    private void RefreshEmptyState()
+    {
+        EmptyState.Visibility = _rows.Count == 0 ? Visibility.Visible : Visibility.Collapsed;
+    }
+
+    // ─── 이벤트 핸들러 ────────────────────────────────────────────────────
+    private void TitleBar_MouseDown(object sender, MouseButtonEventArgs e)
+    {
+        if (e.LeftButton == MouseButtonState.Pressed) DragMove();
+    }
+
+    private void BtnClose_Click(object sender, MouseButtonEventArgs e) => Close();
+    private void BtnCancel_Click(object sender, MouseButtonEventArgs e) => Close();
+
+    private void BtnAddApp_Click(object sender, MouseButtonEventArgs e)
+    {
+        using var dlg = new System.Windows.Forms.OpenFileDialog
+        {
+            Title  = "앱 실행 파일 선택",
+            Filter = "실행 파일 (*.exe)|*.exe|모든 파일 (*.*)|*.*",
+        };
+        if (dlg.ShowDialog() != System.Windows.Forms.DialogResult.OK) return;
+
+        var label = Path.GetFileNameWithoutExtension(dlg.FileName);
+        AddRow(dlg.FileName, label, "full");
+    }
+
+    private void BtnSave_Click(object sender, MouseButtonEventArgs e)
+    {
+        var name = NameBox.Text.Trim();
+        if (string.IsNullOrWhiteSpace(name))
+        {
+            NotificationService.Notify("세션 편집기", "세션 이름을 입력하세요.");
+            NameBox.Focus();
+            return;
+        }
+
+        // 빈 경로 행 필터링
+        var validApps = _rows
+            .Where(r => !string.IsNullOrWhiteSpace(r.Path))
+            .Select(r => new SessionApp
+            {
+                Path         = r.Path.Trim(),
+                Arguments    = r.Arguments.Trim(),
+                Label        = r.Label.Trim(),
+                SnapPosition = r.SnapPosition,
+                DelayMs      = r.DelayMs,
+            }).ToList();
+
+        var session = new AppSession
+        {
+            Name        = name,
+            Description = DescBox.Text.Trim(),
+            Apps        = validApps,
+            CreatedAt   = _original?.CreatedAt ?? DateTime.Now,
+        };
+
+        // 기존 세션 교체 또는 신규 추가
+        if (_original != null)
+        {
+            var idx = _settings.Settings.AppSessions.IndexOf(_original);
+            if (idx >= 0)
+                _settings.Settings.AppSessions[idx] = session;
+            else
+                _settings.Settings.AppSessions.Add(session);
+        }
+        else
+        {
+            // 동일 이름 세션이 있으면 교체
+            var existing = _settings.Settings.AppSessions
+                .FirstOrDefault(s => s.Name.Equals(name, StringComparison.OrdinalIgnoreCase));
+            if (existing != null)
+                _settings.Settings.AppSessions.Remove(existing);
+            _settings.Settings.AppSessions.Add(session);
+        }
+
+        _settings.Save();
+        NotificationService.Notify("AX Copilot",
+            $"세션 '{name}' 저장됨 ({validApps.Count}개 앱)");
+        LogService.Info($"세션 저장: {name} ({validApps.Count}개 앱)");
+        Close();
+    }
+}
+
+// ─── 앱 행 UI 모델 ────────────────────────────────────────────────────────────
+internal class AppRowUi
+{
+    public string Path         { get; set; }
+    public string Label        { get; set; }
+    public string SnapPosition { get; set; }
+    public string Arguments    { get; set; }
+    public int    DelayMs      { get; set; }
+
+    // UI 참조 (라벨 갱신용)
+    internal System.Windows.Controls.TextBlock? SnapLabelRef  { get; set; }
+    internal System.Windows.Controls.Border?    SnapButtonRef { get; set; }
+
+    public AppRowUi(string path, string label, string snap, string args, int delayMs)
+    {
+        Path         = path;
+        Label        = label;
+        SnapPosition = snap;
+        Arguments    = args;
+        DelayMs      = delayMs;
+    }
+
+    public void UpdateSnapLabel()
+    {
+        if (SnapLabelRef != null)
+            SnapLabelRef.Text = SnapPosition;
+    }
+}