feat(pop-designer): POP 디자이너 v2.0 - 4가지 디바이스 모드 및 캔버스 UX 개선

- v2 레이아웃 데이터 구조 도입 (4모드별 별도 레이아웃 + 공유 컴포넌트 정의)
  - tablet_landscape, tablet_portrait, mobile_landscape, mobile_portrait
  - sections/components를 Record<string, Definition> 객체로 관리
  - v1 → v2 자동 마이그레이션 지원

- 캔버스 UX 개선
  - 줌 기능 (30%~150%, 마우스 휠 + 버튼)
  - 패닝 기능 (중앙 마우스, Space+드래그, 배경 드래그)
  - 2개 캔버스 동시 표시 (가로/세로 모드)

- Delete 키로 섹션/컴포넌트 삭제 기능 추가
  - layout.sections 순회하여 componentIds에서 부모 섹션 찾는 방식

- 미리보기 v2 레이아웃 호환성 수정
  - Object.keys(layout.sections).length 체크로 변경

수정 파일: PopDesigner.tsx, PopCanvas.tsx, SectionGridV2.tsx(신규),
          types/pop-layout.ts, PopPanel.tsx, PopScreenPreview.tsx,
          PopCategoryTree.tsx, screenManagementService.ts

backend-node/src/services/screenManagementService.ts

@@ -4710,12 +4710,89 @@ export class ScreenManagementService {
 
   // ========================================
   // POP 레이아웃 관리 (모바일/태블릿)
+  // v2.0: 4모드 레이아웃 지원 (태블릿 가로/세로, 모바일 가로/세로)
   // ========================================
 
+  /**
+   * POP v1 → v2 마이그레이션 (백엔드)
+   * - 단일 sections 배열 → 4모드별 layouts + 공유 sections/components
+   */
+  private migratePopV1ToV2(v1Data: any): any {
+    console.log("POP v1 → v2 마이그레이션 시작");
+    
+    // 기본 v2 구조
+    const v2Data: any = {
+      version: "pop-2.0",
+      layouts: {
+        tablet_landscape: { sectionPositions: {}, componentPositions: {} },
+        tablet_portrait: { sectionPositions: {}, componentPositions: {} },
+        mobile_landscape: { sectionPositions: {}, componentPositions: {} },
+        mobile_portrait: { sectionPositions: {}, componentPositions: {} },
+      },
+      sections: {},
+      components: {},
+      dataFlow: {
+        sectionConnections: [],
+      },
+      settings: {
+        touchTargetMin: 48,
+        mode: "normal",
+        canvasGrid: v1Data.canvasGrid || { columns: 24, rowHeight: 20, gap: 4 },
+      },
+      metadata: v1Data.metadata,
+    };
+
+    // v1 섹션 배열 처리
+    const sections = v1Data.sections || [];
+    const modeKeys = ["tablet_landscape", "tablet_portrait", "mobile_landscape", "mobile_portrait"];
+
+    for (const section of sections) {
+      // 섹션 정의 생성
+      v2Data.sections[section.id] = {
+        id: section.id,
+        label: section.label,
+        componentIds: (section.components || []).map((c: any) => c.id),
+        innerGrid: section.innerGrid || { columns: 3, rows: 3, gap: 4 },
+        style: section.style,
+      };
+
+      // 섹션 위치 복사 (4모드 모두 동일)
+      const sectionPos = section.grid || { col: 1, row: 1, colSpan: 3, rowSpan: 4 };
+      for (const mode of modeKeys) {
+        v2Data.layouts[mode].sectionPositions[section.id] = { ...sectionPos };
+      }
+
+      // 컴포넌트별 처리
+      for (const comp of section.components || []) {
+        // 컴포넌트 정의 생성
+        v2Data.components[comp.id] = {
+          id: comp.id,
+          type: comp.type,
+          label: comp.label,
+          dataBinding: comp.dataBinding,
+          style: comp.style,
+          config: comp.config,
+        };
+
+        // 컴포넌트 위치 복사 (4모드 모두 동일)
+        const compPos = comp.grid || { col: 1, row: 1, colSpan: 1, rowSpan: 1 };
+        for (const mode of modeKeys) {
+          v2Data.layouts[mode].componentPositions[comp.id] = { ...compPos };
+        }
+      }
+    }
+
+    const sectionCount = Object.keys(v2Data.sections).length;
+    const componentCount = Object.keys(v2Data.components).length;
+    console.log(`POP v1 → v2 마이그레이션 완료: ${sectionCount}개 섹션, ${componentCount}개 컴포넌트`);
+    
+    return v2Data;
+  }
+
   /**
    * POP 레이아웃 조회
    * - screen_layouts_pop 테이블에서 화면당 1개 레코드 조회
-   * - V2와 동일한 로직, 테이블명만 다름
+   * - v1 데이터는 자동으로 v2로 마이그레이션하여 반환
    */
   async getLayoutPop(
     screenId: number,
@@ -4792,16 +4869,32 @@ export class ScreenManagementService {
       return null;
     }
 
-    console.log(
+    const layoutData = layout.layout_data;
-      `POP 레이아웃 로드 완료: ${layout.layout_data?.components?.length || 0}개 컴포넌트`,
+
-    );
+    // v1 → v2 자동 마이그레이션
-    return layout.layout_data;
+    if (layoutData && layoutData.version === "pop-1.0") {
+      console.log("POP v1 레이아웃 감지, v2로 마이그레이션");
+      return this.migratePopV1ToV2(layoutData);
+    }
+
+    // v2 또는 버전 태그 없는 경우 (버전 태그 없으면 sections 구조 확인)
+    if (layoutData && !layoutData.version && layoutData.sections && Array.isArray(layoutData.sections)) {
+      console.log("버전 태그 없는 v1 레이아웃 감지, v2로 마이그레이션");
+      return this.migratePopV1ToV2({ ...layoutData, version: "pop-1.0" });
+    }
+
+    // v2 레이아웃 그대로 반환
+    const sectionCount = layoutData?.sections ? Object.keys(layoutData.sections).length : 0;
+    const componentCount = layoutData?.components ? Object.keys(layoutData.components).length : 0;
+    console.log(`POP v2 레이아웃 로드 완료: ${sectionCount}개 섹션, ${componentCount}개 컴포넌트`);
+    
+    return layoutData;
   }
 
   /**
    * POP 레이아웃 저장
    * - screen_layouts_pop 테이블에 화면당 1개 레코드 저장
-   * - V2와 동일한 로직, 테이블명만 다름
+   * - v2 형식으로 저장 (version: "pop-2.0")
    */
   async saveLayoutPop(
     screenId: number,
@@ -4811,7 +4904,18 @@ export class ScreenManagementService {
   ): Promise<void> {
     console.log(`=== POP 레이아웃 저장 시작 ===`);
     console.log(`화면 ID: ${screenId}, 회사: ${companyCode}`);
-    console.log(`컴포넌트 수: ${layoutData.components?.length || 0}`);
+    
+    // v2 구조 확인
+    const isV2 = layoutData.version === "pop-2.0" || 
+                 (layoutData.layouts && layoutData.sections && layoutData.components);
+    
+    if (isV2) {
+      const sectionCount = Object.keys(layoutData.sections || {}).length;
+      const componentCount = Object.keys(layoutData.components || {}).length;
+      console.log(`v2 레이아웃: ${sectionCount}개 섹션, ${componentCount}개 컴포넌트`);
+    } else {
+      console.log(`v1 레이아웃 (섹션 수: ${layoutData.sections?.length || 0})`);
+    }
 
     // 권한 확인
     const screens = await query<{ company_code: string | null }>(
@@ -4829,11 +4933,20 @@ export class ScreenManagementService {
       throw new Error("이 화면의 POP 레이아웃을 저장할 권한이 없습니다.");
     }
 
-    // 버전 정보 추가 (프론트엔드 pop-1.0과 통일)
+    // 버전 정보 보장 (v2 우선, v1은 프론트엔드에서 마이그레이션 후 저장 권장)
-    const dataToSave = {
+    let dataToSave: any;
-      version: "pop-1.0",
+    if (isV2) {
-      ...layoutData
+      dataToSave = {
-    };
+        ...layoutData,
+        version: "pop-2.0",
+      };
+    } else {
+      // v1 형식으로 저장 (하위 호환)
+      dataToSave = {
+        version: "pop-1.0",
+        ...layoutData,
+      };
+    }
 
     // UPSERT (있으면 업데이트, 없으면 삽입)
     await query(
@@ -4844,7 +4957,7 @@ export class ScreenManagementService {
       [screenId, companyCode, JSON.stringify(dataToSave), userId || null],
     );
 
-    console.log(`POP 레이아웃 저장 완료`);
+    console.log(`POP 레이아웃 저장 완료 (version: ${dataToSave.version})`);
   }
 
   /**

frontend/components/pop/designer/PopCanvas.tsx

@@ -1,162 +1,283 @@
 "use client";
 
-import { useCallback, useMemo, useRef } from "react";
+import { useCallback, useMemo, useRef, useState, useEffect } from "react";
 import { useDrop } from "react-dnd";
 import GridLayout, { Layout } from "react-grid-layout";
 import { cn } from "@/lib/utils";
 import {
-  PopLayoutData,
+  PopLayoutDataV2,
-  PopSectionData,
+  PopLayoutModeKey,
-  PopComponentData,
   PopComponentType,
   GridPosition,
+  MODE_RESOLUTIONS,
 } from "./types/pop-layout";
-import { DND_ITEM_TYPES, DragItemSection, DragItemComponent } from "./panels/PopPanel";
+import { DND_ITEM_TYPES, DragItemSection } from "./panels/PopPanel";
-import { GripVertical, Trash2 } from "lucide-react";
+import { GripVertical, Trash2, ZoomIn, ZoomOut, Maximize2 } from "lucide-react";
 import { Button } from "@/components/ui/button";
-import { SectionGrid } from "./SectionGrid";
+import { SectionGridV2 } from "./SectionGridV2";
 
 import "react-grid-layout/css/styles.css";
 import "react-resizable/css/styles.css";
 
+// ========================================
+// 타입 정의
+// ========================================
 type DeviceType = "mobile" | "tablet";
 
-// 디바이스별 캔버스 크기 (dp)
+// 모드별 라벨
-const DEVICE_SIZES = {
+const MODE_LABELS: Record<PopLayoutModeKey, string> = {
-  mobile: {
+  tablet_landscape: "태블릿 가로",
-    portrait: { width: 360, height: 640 },
+  tablet_portrait: "태블릿 세로",
-    landscape: { width: 640, height: 360 },
+  mobile_landscape: "모바일 가로",
-  },
+  mobile_portrait: "모바일 세로",
-  tablet: {
+};
-    portrait: { width: 768, height: 1024 },
-    landscape: { width: 1024, height: 768 },
-  },
-} as const;
 
+// ========================================
+// Props
+// ========================================
 interface PopCanvasProps {
-  layout: PopLayoutData;
+  layout: PopLayoutDataV2;
   activeDevice: DeviceType;
-  showBothDevices: boolean;
+  activeModeKey: PopLayoutModeKey;
-  isLandscape: boolean;
+  onModeKeyChange: (modeKey: PopLayoutModeKey) => void;
   selectedSectionId: string | null;
   selectedComponentId: string | null;
   onSelectSection: (id: string | null) => void;
   onSelectComponent: (id: string | null) => void;
-  onUpdateSection: (id: string, updates: Partial<PopSectionData>) => void;
+  onUpdateSectionPosition: (sectionId: string, position: GridPosition, modeKey?: PopLayoutModeKey) => void;
+  onUpdateComponentPosition: (componentId: string, position: GridPosition, modeKey?: PopLayoutModeKey) => void;
   onDeleteSection: (id: string) => void;
-  onLayoutChange: (sections: PopSectionData[]) => void;
   onDropSection: (gridPosition: GridPosition) => void;
   onDropComponent: (sectionId: string, type: PopComponentType, gridPosition: GridPosition) => void;
-  onUpdateComponent: (sectionId: string, componentId: string, updates: Partial<PopComponentData>) => void;
   onDeleteComponent: (sectionId: string, componentId: string) => void;
 }
 
+// ========================================
+// 메인 컴포넌트
+// ========================================
 export function PopCanvas({
   layout,
   activeDevice,
-  showBothDevices,
+  activeModeKey,
-  isLandscape,
+  onModeKeyChange,
   selectedSectionId,
   selectedComponentId,
   onSelectSection,
   onSelectComponent,
-  onUpdateSection,
+  onUpdateSectionPosition,
+  onUpdateComponentPosition,
   onDeleteSection,
-  onLayoutChange,
   onDropSection,
   onDropComponent,
-  onUpdateComponent,
   onDeleteComponent,
 }: PopCanvasProps) {
-  const { canvasGrid, sections } = layout;
+  const { settings, sections, components, layouts } = layout;
+  const canvasGrid = settings.canvasGrid;
 
-  // GridLayout용 레이아웃 변환
+  // 줌 상태 (0.3 ~ 1.0 범위)
-  const gridLayoutItems: Layout[] = useMemo(() => {
+  const [canvasScale, setCanvasScale] = useState(0.6);
-    return sections.map((section) => ({
-      i: section.id,
-      x: section.grid.col - 1,
-      y: section.grid.row - 1,
-      w: section.grid.colSpan,
-      h: section.grid.rowSpan,
-      minW: 2,  // 최소 너비 2칸
-      minH: 1,  // 최소 높이 1행 (20px) - 헤더만 보임
-    }));
-  }, [sections]);
 
-  // 드래그/리사이즈 완료 핸들러 (onDragStop, onResizeStop 사용)
+  // 패닝 상태
-  const handleDragResizeStop = useCallback(
+  const [isPanning, setIsPanning] = useState(false);
-    (layout: Layout[], oldItem: Layout, newItem: Layout) => {
+  const [panStart, setPanStart] = useState({ x: 0, y: 0 });
-      const section = sections.find((s) => s.id === newItem.i);
+  const [isSpacePressed, setIsSpacePressed] = useState(false); // Space 키 눌림 상태
-      if (!section) return;
+  const containerRef = useRef<HTMLDivElement>(null);
 
-      const newGrid: GridPosition = {
+  // 줌 인 (최대 1.5로 증가)
-        col: newItem.x + 1,
+  const handleZoomIn = () => {
-        row: newItem.y + 1,
+    setCanvasScale((prev) => Math.min(1.5, prev + 0.1));
-        colSpan: newItem.w,
+  };
-        rowSpan: newItem.h,
-      };
 
-      // 변경된 경우에만 업데이트
+  // 줌 아웃 (최소 0.3)
-      if (
+  const handleZoomOut = () => {
-        section.grid.col !== newGrid.col ||
+    setCanvasScale((prev) => Math.max(0.3, prev - 0.1));
-        section.grid.row !== newGrid.row ||
+  };
-        section.grid.colSpan !== newGrid.colSpan ||
+
-        section.grid.rowSpan !== newGrid.rowSpan
+  // 맞춤 (1.0)
-      ) {
+  const handleZoomFit = () => {
-        const updatedSections = sections.map((s) =>
+    setCanvasScale(1.0);
-          s.id === newItem.i ? { ...s, grid: newGrid } : s
+  };
-        );
+
-        onLayoutChange(updatedSections);
+  // 패닝 시작 (중앙 마우스 버튼 또는 배경 영역 드래그)
+  const handlePanStart = (e: React.MouseEvent) => {
+    // 중앙 마우스 버튼(휠 버튼, button === 1) 또는 Space 키 누른 상태
+    // 또는 내부 컨테이너(스크롤 영역) 직접 클릭 시
+    const isMiddleButton = e.button === 1;
+    const isScrollAreaClick = (e.target as HTMLElement).classList.contains("canvas-scroll-area");
+    
+    if (isMiddleButton || isSpacePressed || isScrollAreaClick) {
+      setIsPanning(true);
+      setPanStart({ x: e.clientX, y: e.clientY });
+      e.preventDefault();
+    }
+  };
+
+  // 패닝 중
+  const handlePanMove = (e: React.MouseEvent) => {
+    if (!isPanning || !containerRef.current) return;
+
+    const deltaX = e.clientX - panStart.x;
+    const deltaY = e.clientY - panStart.y;
+
+    containerRef.current.scrollLeft -= deltaX;
+    containerRef.current.scrollTop -= deltaY;
+
+    setPanStart({ x: e.clientX, y: e.clientY });
+  };
+
+  // 패닝 종료
+  const handlePanEnd = () => {
+    setIsPanning(false);
+  };
+
+  // 마우스 휠 줌 (0.3 ~ 1.5 범위)
+  const handleWheel = useCallback((e: React.WheelEvent) => {
+    e.preventDefault(); // 브라우저 스크롤 방지
+    
+    const delta = e.deltaY > 0 ? -0.1 : 0.1; // 위로 스크롤: 줌인, 아래로 스크롤: 줌아웃
+    setCanvasScale((prev) => Math.max(0.3, Math.min(1.5, prev + delta)));
+  }, []);
+
+  // Space 키 감지
+  useEffect(() => {
+    const handleKeyDown = (e: KeyboardEvent) => {
+      if (e.code === "Space" && !isSpacePressed) {
+        setIsSpacePressed(true);
       }
-    },
+    };
-    [sections, onLayoutChange]
-  );
 
-  // 디바이스 프레임 렌더링
+    const handleKeyUp = (e: KeyboardEvent) => {
-  const renderDeviceFrame = (device: DeviceType) => {
+      if (e.code === "Space") {
-    const orientation = isLandscape ? "landscape" : "portrait";
+        setIsSpacePressed(false);
-    const size = DEVICE_SIZES[device][orientation];
+      }
-    const isActive = device === activeDevice;
+    };
+
+    window.addEventListener("keydown", handleKeyDown);
+    window.addEventListener("keyup", handleKeyUp);
+
+    return () => {
+      window.removeEventListener("keydown", handleKeyDown);
+      window.removeEventListener("keyup", handleKeyUp);
+    };
+  }, [isSpacePressed]);
+
+  // 초기 로드 시 캔버스를 중앙으로 스크롤
+  useEffect(() => {
+    if (containerRef.current) {
+      const container = containerRef.current;
+      // 약간의 딜레이 후 중앙으로 스크롤 (DOM이 완전히 렌더링된 후)
+      const timer = setTimeout(() => {
+        const scrollX = (container.scrollWidth - container.clientWidth) / 2;
+        const scrollY = (container.scrollHeight - container.clientHeight) / 2;
+        container.scrollTo(scrollX, scrollY);
+      }, 100);
+      return () => clearTimeout(timer);
+    }
+  }, [activeDevice]); // 디바이스 변경 시 재중앙화
+
+  // 현재 디바이스의 가로/세로 모드 키
+  const landscapeModeKey: PopLayoutModeKey = activeDevice === "tablet" 
+    ? "tablet_landscape" 
+    : "mobile_landscape";
+  const portraitModeKey: PopLayoutModeKey = activeDevice === "tablet" 
+    ? "tablet_portrait" 
+    : "mobile_portrait";
+
+  // 단일 캔버스 프레임 렌더링
+  const renderDeviceFrame = (modeKey: PopLayoutModeKey) => {
+    const resolution = MODE_RESOLUTIONS[modeKey];
+    const isActive = modeKey === activeModeKey;
+    const modeLayout = layouts[modeKey];
+
+    // 이 모드의 섹션 위치 목록
+    const sectionPositions = modeLayout.sectionPositions;
+    const sectionIds = Object.keys(sectionPositions);
+
+    // GridLayout용 레이아웃 아이템 생성
+    const gridLayoutItems: Layout[] = sectionIds.map((sectionId) => {
+      const pos = sectionPositions[sectionId];
+      return {
+        i: sectionId,
+        x: pos.col - 1,
+        y: pos.row - 1,
+        w: pos.colSpan,
+        h: pos.rowSpan,
+        minW: 2,
+        minH: 1,
+      };
+    });
 
     const cols = canvasGrid.columns;
     const rowHeight = canvasGrid.rowHeight;
     const margin: [number, number] = [canvasGrid.gap, canvasGrid.gap];
 
-    const sizeLabel = `${size.width}x${size.height}`;
+    const sizeLabel = `${resolution.width}x${resolution.height}`;
-    const deviceLabel =
+    const modeLabel = `${MODE_LABELS[modeKey]} (${sizeLabel})`;
-      device === "mobile" ? `모바일 (${sizeLabel})` : `태블릿 (${sizeLabel})`;
+
+    // 드래그/리사이즈 완료 핸들러
+    const handleDragResizeStop = (
+      layoutItems: Layout[],
+      oldItem: Layout,
+      newItem: Layout
+    ) => {
+      const newPos: GridPosition = {
+        col: newItem.x + 1,
+        row: newItem.y + 1,
+        colSpan: newItem.w,
+        rowSpan: newItem.h,
+      };
+      onUpdateSectionPosition(newItem.i, newPos, modeKey);
+    };
 
     return (
       <div
+        key={modeKey}
         className={cn(
-          "relative rounded-[2rem] border-4 bg-white shadow-xl transition-all",
+          "relative shrink-0 cursor-pointer rounded-lg border-4 bg-white shadow-xl transition-all",
-          isActive ? "border-primary" : "border-gray-300",
+          isActive 
-          device === "mobile" ? "rounded-[1.5rem]" : "rounded-[2rem]"
+            ? "border-primary ring-2 ring-primary/30" 
+            : "border-gray-300 hover:border-gray-400"
         )}
         style={{
-          width: size.width,
+          width: resolution.width * canvasScale,
-          height: size.height,
+          height: resolution.height * canvasScale,
+        }}
+        onClick={() => {
+          if (!isActive) {
+            onModeKeyChange(modeKey);
+          }
         }}
       >
-        {/* 디바이스 라벨 */}
+        {/* 모드 라벨 */}
         <div
           className={cn(
             "absolute -top-6 left-1/2 -translate-x-1/2 whitespace-nowrap text-xs font-medium",
             isActive ? "text-primary" : "text-muted-foreground"
           )}
         >
-          {deviceLabel}
+          {modeLabel}
         </div>
 
+        {/* 활성 표시 배지 */}
+        {isActive && (
+          <div className="absolute right-2 top-2 rounded-full bg-primary px-2 py-0.5 text-[10px] font-bold text-white shadow-lg">
+            편집 중
+          </div>
+        )}
+
         {/* 드롭 영역 */}
         <CanvasDropZone
-          device={device}
+          modeKey={modeKey}
           isActive={isActive}
-          size={size}
+          resolution={resolution}
+          scale={canvasScale}
           cols={cols}
           rowHeight={rowHeight}
           margin={margin}
           sections={sections}
+          components={components}
+          sectionPositions={sectionPositions}
+          componentPositions={modeLayout.componentPositions}
           gridLayoutItems={gridLayoutItems}
           selectedSectionId={selectedSectionId}
           selectedComponentId={selectedComponentId}
@@ -165,8 +286,8 @@ export function PopCanvas({
           onDragResizeStop={handleDragResizeStop}
           onDropSection={onDropSection}
           onDropComponent={onDropComponent}
+          onUpdateComponentPosition={(compId, pos) => onUpdateComponentPosition(compId, pos, modeKey)}
           onDeleteSection={onDeleteSection}
-          onUpdateComponent={onUpdateComponent}
           onDeleteComponent={onDeleteComponent}
         />
       </div>
@@ -174,28 +295,91 @@ export function PopCanvas({
   };
 
   return (
-    <div className="flex h-full items-center justify-center gap-8 overflow-auto bg-gray-50 p-8">
+    <div className="relative flex h-full flex-col bg-gray-50">
-      {showBothDevices ? (
+      {/* 줌 컨트롤 바 */}
-        <>
+      <div className="flex shrink-0 items-center justify-end gap-2 border-b bg-white px-4 py-2">
-          {renderDeviceFrame("tablet")}
+        <span className="text-xs text-muted-foreground">
-          {renderDeviceFrame("mobile")}
+          줌: {Math.round(canvasScale * 100)}%
-        </>
+        </span>
-      ) : (
+        <Button
-        renderDeviceFrame(activeDevice)
+          variant="outline"
-      )}
+          size="icon"
+          className="h-7 w-7"
+          onClick={handleZoomOut}
+          title="줌 아웃"
+        >
+          <ZoomOut className="h-4 w-4" />
+        </Button>
+        <Button
+          variant="outline"
+          size="icon"
+          className="h-7 w-7"
+          onClick={handleZoomIn}
+          title="줌 인"
+        >
+          <ZoomIn className="h-4 w-4" />
+        </Button>
+        <Button
+          variant="outline"
+          size="icon"
+          className="h-7 w-7"
+          onClick={handleZoomFit}
+          title="맞춤 (100%)"
+        >
+          <Maximize2 className="h-4 w-4" />
+        </Button>
+      </div>
+
+      {/* 캔버스 영역 (패닝 가능) */}
+      <div
+        ref={containerRef}
+        className={cn(
+          "relative flex-1 overflow-auto",
+          isPanning && "cursor-grabbing",
+          isSpacePressed && "cursor-grab"
+        )}
+        onMouseDown={handlePanStart}
+        onMouseMove={handlePanMove}
+        onMouseUp={handlePanEnd}
+        onMouseLeave={handlePanEnd}
+        onWheel={handleWheel}
+      >
+        {/* 스크롤 가능한 큰 영역 - 빈 공간 클릭 시 패닝 가능 */}
+        <div 
+          className="canvas-scroll-area flex items-center justify-center gap-16"
+          style={{
+            // 캔버스 주변에 충분한 여백 확보 (상하좌우 500px씩)
+            padding: "500px",
+            minWidth: "fit-content",
+            minHeight: "fit-content",
+          }}
+        >
+          {/* 가로 모드 캔버스 */}
+          {renderDeviceFrame(landscapeModeKey)}
+          
+          {/* 세로 모드 캔버스 */}
+          {renderDeviceFrame(portraitModeKey)}
+        </div>
+      </div>
     </div>
   );
 }
 
-// 캔버스 드롭 영역
+// ========================================
+// 캔버스 드롭 영역 컴포넌트
+// ========================================
 interface CanvasDropZoneProps {
-  device: DeviceType;
+  modeKey: PopLayoutModeKey;
   isActive: boolean;
-  size: { width: number; height: number };
+  resolution: { width: number; height: number };
+  scale: number;
   cols: number;
   rowHeight: number;
   margin: [number, number];
-  sections: PopSectionData[];
+  sections: PopLayoutDataV2["sections"];
+  components: PopLayoutDataV2["components"];
+  sectionPositions: Record<string, GridPosition>;
+  componentPositions: Record<string, GridPosition>;
   gridLayoutItems: Layout[];
   selectedSectionId: string | null;
   selectedComponentId: string | null;
@@ -204,19 +388,23 @@ interface CanvasDropZoneProps {
   onDragResizeStop: (layout: Layout[], oldItem: Layout, newItem: Layout) => void;
   onDropSection: (gridPosition: GridPosition) => void;
   onDropComponent: (sectionId: string, type: PopComponentType, gridPosition: GridPosition) => void;
+  onUpdateComponentPosition: (componentId: string, position: GridPosition) => void;
   onDeleteSection: (id: string) => void;
-  onUpdateComponent: (sectionId: string, componentId: string, updates: Partial<PopComponentData>) => void;
   onDeleteComponent: (sectionId: string, componentId: string) => void;
 }
 
 function CanvasDropZone({
-  device,
+  modeKey,
   isActive,
-  size,
+  resolution,
+  scale,
   cols,
   rowHeight,
   margin,
   sections,
+  components,
+  sectionPositions,
+  componentPositions,
   gridLayoutItems,
   selectedSectionId,
   selectedComponentId,
@@ -225,55 +413,70 @@ function CanvasDropZone({
   onDragResizeStop,
   onDropSection,
   onDropComponent,
+  onUpdateComponentPosition,
   onDeleteSection,
-  onUpdateComponent,
   onDeleteComponent,
 }: CanvasDropZoneProps) {
   const dropRef = useRef<HTMLDivElement>(null);
 
+  // 스케일 적용된 크기
+  const scaledWidth = resolution.width * scale;
+  const scaledHeight = resolution.height * scale;
+
   // 섹션 드롭 핸들러
-  const [{ isOver, canDrop }, drop] = useDrop(() => ({
+  const [{ isOver, canDrop }, drop] = useDrop(
-    accept: DND_ITEM_TYPES.SECTION,
+    () => ({
-    drop: (item: DragItemSection, monitor) => {
+      accept: DND_ITEM_TYPES.SECTION,
-      if (!isActive) return;
+      drop: (item: DragItemSection, monitor) => {
+        if (!isActive) return;
 
-      // 드롭 위치 계산
+        const clientOffset = monitor.getClientOffset();
-      const clientOffset = monitor.getClientOffset();
+        if (!clientOffset || !dropRef.current) return;
-      if (!clientOffset || !dropRef.current) return;
 
-      const dropRect = dropRef.current.getBoundingClientRect();
+        const dropRect = dropRef.current.getBoundingClientRect();
-      const x = clientOffset.x - dropRect.left;
+        // 스케일 보정
-      const y = clientOffset.y - dropRect.top;
+        const x = (clientOffset.x - dropRect.left) / scale;
+        const y = (clientOffset.y - dropRect.top) / scale;
 
-      // 그리드 위치 계산
+        // 그리드 위치 계산
-      const colWidth = (size.width - 16) / cols;
+        const colWidth = (resolution.width - 16) / cols;
-      const col = Math.max(1, Math.min(cols, Math.floor(x / colWidth) + 1));
+        const col = Math.max(1, Math.min(cols, Math.floor(x / colWidth) + 1));
-      const row = Math.max(1, Math.floor(y / rowHeight) + 1);
+        const row = Math.max(1, Math.floor(y / (rowHeight * scale)) + 1);
 
-      onDropSection({
+        onDropSection({
-        col,
+          col,
-        row,
+          row,
-        colSpan: 3,  // 기본 너비
+          colSpan: 3,
-        rowSpan: 4,  // 기본 높이 (20px * 4 = 80px)
+          rowSpan: 4,
-      });
+        });
-    },
+      },
-    canDrop: () => isActive,
+      canDrop: () => isActive,
-    collect: (monitor) => ({
+      collect: (monitor) => ({
-      isOver: monitor.isOver(),
+        isOver: monitor.isOver(),
-      canDrop: monitor.canDrop(),
+        canDrop: monitor.canDrop(),
+      }),
     }),
-  }), [isActive, size, cols, rowHeight, onDropSection]);
+    [isActive, resolution, scale, cols, rowHeight, onDropSection]
+  );
 
-  // ref 결합
   drop(dropRef);
 
+  const sectionIds = Object.keys(sectionPositions);
+
   return (
     <div
       ref={dropRef}
       className={cn(
-        "h-full w-full overflow-auto rounded-[1.5rem] bg-gray-100 p-2 transition-colors",
+        "h-full w-full overflow-hidden rounded-md bg-gray-100 p-1 transition-colors",
         isOver && canDrop && "bg-primary/10 ring-2 ring-primary ring-inset"
       )}
+      style={{
+        // 내부 컨텐츠를 스케일 조정
+        transform: `scale(${scale})`,
+        transformOrigin: "top left",
+        width: resolution.width,
+        height: resolution.height,
+      }}
       onClick={(e) => {
         if (e.target === e.currentTarget) {
           onSelectSection(null);
@@ -281,13 +484,13 @@ function CanvasDropZone({
         }
       }}
     >
-      {sections.length > 0 ? (
+      {sectionIds.length > 0 ? (
         <GridLayout
           className="layout"
           layout={gridLayoutItems}
           cols={cols}
           rowHeight={rowHeight}
-          width={size.width - 16}
+          width={resolution.width - 8}
           margin={margin}
           containerPadding={[0, 0]}
           onDragStop={onDragResizeStop}
@@ -299,64 +502,70 @@ function CanvasDropZone({
           useCSSTransforms={true}
           draggableHandle=".section-drag-handle"
         >
-          {sections.map((section) => (
+          {sectionIds.map((sectionId) => {
-            <div
+            const sectionDef = sections[sectionId];
-              key={section.id}
+            if (!sectionDef) return null;
-              className={cn(
-                "group relative flex flex-col rounded-lg border-2 bg-white transition-all overflow-hidden",
-                selectedSectionId === section.id
-                  ? "border-primary ring-2 ring-primary/30"
-                  : "border-gray-200 hover:border-gray-400"
-              )}
-              onClick={(e) => {
-                e.stopPropagation();
-                onSelectSection(section.id);
-              }}
-            >
-              {/* 섹션 헤더 - 고정 높이 */}
-              <div
-                className={cn(
-                  "section-drag-handle flex h-7 shrink-0 cursor-move items-center justify-between border-b px-2",
-                  selectedSectionId === section.id
-                    ? "bg-primary/10"
-                    : "bg-gray-50"
-                )}
-              >
-                <div className="flex items-center gap-1">
-                  <GripVertical className="h-3 w-3 text-gray-400" />
-                  <span className="text-xs font-medium text-gray-600">
-                    {section.label || `섹션`}
-                  </span>
-                </div>
-                {selectedSectionId === section.id && (
-                  <Button
-                    variant="ghost"
-                    size="icon"
-                    className="h-5 w-5 text-destructive hover:bg-destructive/10"
-                    onClick={(e) => {
-                      e.stopPropagation();
-                      onDeleteSection(section.id);
-                    }}
-                  >
-                    <Trash2 className="h-3 w-3" />
-                  </Button>
-                )}
-              </div>
 
-              {/* 섹션 내부 - 나머지 영역 전부 차지 */}
+            return (
-              <div className="relative flex-1">
+              <div
-                <SectionGrid
+                key={sectionId}
-                  section={section}
+                className={cn(
-                  isActive={isActive}
+                  "group relative flex flex-col overflow-hidden rounded-lg border-2 bg-white transition-all",
-                  selectedComponentId={selectedComponentId}
+                  selectedSectionId === sectionId
-                  onSelectComponent={onSelectComponent}
+                    ? "border-primary ring-2 ring-primary/30"
-                  onDropComponent={onDropComponent}
+                    : "border-gray-200 hover:border-gray-400"
-                  onUpdateComponent={onUpdateComponent}
+                )}
-                  onDeleteComponent={onDeleteComponent}
+                onClick={(e) => {
-                />
+                  e.stopPropagation();
+                  onSelectSection(sectionId);
+                }}
+              >
+                {/* 섹션 헤더 */}
+                <div
+                  className={cn(
+                    "section-drag-handle flex h-7 shrink-0 cursor-move items-center justify-between border-b px-2",
+                    selectedSectionId === sectionId ? "bg-primary/10" : "bg-gray-50"
+                  )}
+                >
+                  <div className="flex items-center gap-1">
+                    <GripVertical className="h-3 w-3 text-gray-400" />
+                    <span className="text-xs font-medium text-gray-600">
+                      {sectionDef.label || "섹션"}
+                    </span>
+                  </div>
+                  {selectedSectionId === sectionId && isActive && (
+                    <Button
+                      variant="ghost"
+                      size="icon"
+                      className="h-5 w-5 text-destructive hover:bg-destructive/10"
+                      onClick={(e) => {
+                        e.stopPropagation();
+                        onDeleteSection(sectionId);
+                      }}
+                    >
+                      <Trash2 className="h-3 w-3" />
+                    </Button>
+                  )}
+                </div>
+
+                {/* 섹션 내부 - 컴포넌트들 */}
+                <div className="relative flex-1">
+                  <SectionGridV2
+                    sectionId={sectionId}
+                    sectionDef={sectionDef}
+                    components={components}
+                    componentPositions={componentPositions}
+                    isActive={isActive}
+                    selectedComponentId={selectedComponentId}
+                    onSelectComponent={onSelectComponent}
+                    onDropComponent={onDropComponent}
+                    onUpdateComponentPosition={onUpdateComponentPosition}
+                    onDeleteComponent={onDeleteComponent}
+                  />
+                </div>
               </div>
-            </div>
+            );
-          ))}
+          })}
         </GridLayout>
       ) : (
         <div
@@ -369,10 +578,11 @@ function CanvasDropZone({
         >
           {isOver && canDrop
             ? "여기에 섹션을 놓으세요"
-            : "왼쪽 패널에서 섹션을 드래그하세요"}
+            : isActive
+            ? "왼쪽 패널에서 섹션을 드래그하세요"
+            : "클릭하여 편집 모드로 전환"}
         </div>
       )}
     </div>
   );
 }
-

frontend/components/pop/designer/PopDesigner.tsx

@@ -1,9 +1,9 @@
 "use client";
 
-import { useState, useCallback, useEffect } from "react";
+import { useState, useCallback, useEffect, useMemo } from "react";
 import { DndProvider } from "react-dnd";
 import { HTML5Backend } from "react-dnd-html5-backend";
-import { ArrowLeft, Save, Smartphone, Tablet, Columns2, RotateCcw } from "lucide-react";
+import { ArrowLeft, Save, Smartphone, Tablet } from "lucide-react";
 import { Button } from "@/components/ui/button";
 import { Tabs, TabsList, TabsTrigger } from "@/components/ui/tabs";
 import {
@@ -16,84 +16,130 @@ import { toast } from "sonner";
 import { PopCanvas } from "./PopCanvas";
 import { PopPanel } from "./panels/PopPanel";
 import {
-  PopLayoutData,
+  PopLayoutDataV2,
-  PopSectionData,
+  PopLayoutModeKey,
-  PopComponentData,
   PopComponentType,
-  createEmptyPopLayout,
-  createPopSection,
-  createPopComponent,
   GridPosition,
+  PopSectionDefinition,
+  createEmptyPopLayoutV2,
+  createSectionDefinition,
+  createComponentDefinition,
+  ensureV2Layout,
+  addSectionToV2Layout,
+  addComponentToV2Layout,
+  removeSectionFromV2Layout,
+  removeComponentFromV2Layout,
+  updateSectionPositionInMode,
+  updateComponentPositionInMode,
+  isV2Layout,
 } from "./types/pop-layout";
 import { screenApi } from "@/lib/api/screen";
 import { ScreenDefinition } from "@/types/screen";
 
+// ========================================
 // 디바이스 타입
+// ========================================
 type DeviceType = "mobile" | "tablet";
 
+/**
+ * 디바이스 + 방향 → 모드 키 변환
+ */
+const getModeKey = (device: DeviceType, isLandscape: boolean): PopLayoutModeKey => {
+  if (device === "tablet") {
+    return isLandscape ? "tablet_landscape" : "tablet_portrait";
+  }
+  return isLandscape ? "mobile_landscape" : "mobile_portrait";
+};
+
+// ========================================
+// Props
+// ========================================
 interface PopDesignerProps {
   selectedScreen: ScreenDefinition;
   onBackToList: () => void;
   onScreenUpdate?: (updatedScreen: Partial<ScreenDefinition>) => void;
 }
 
+// ========================================
+// 메인 컴포넌트
+// ========================================
 export default function PopDesigner({
   selectedScreen,
   onBackToList,
   onScreenUpdate,
 }: PopDesignerProps) {
-  // 레이아웃 상태
+  // ========================================
-  const [layout, setLayout] = useState<PopLayoutData>(createEmptyPopLayout());
+  // 레이아웃 상태 (v2)
+  // ========================================
+  const [layout, setLayout] = useState<PopLayoutDataV2>(createEmptyPopLayoutV2());
   const [isLoading, setIsLoading] = useState(true);
   const [isSaving, setIsSaving] = useState(false);
   const [hasChanges, setHasChanges] = useState(false);
 
-  // 디바이스 프리뷰 상태
+  // ========================================
+  // 디바이스/모드 상태
+  // ========================================
   const [activeDevice, setActiveDevice] = useState<DeviceType>("tablet");
-  const [showBothDevices, setShowBothDevices] = useState(false);
-  const [isLandscape, setIsLandscape] = useState(true);
   
-  // 선택된 섹션/컴포넌트
+  // 활성 모드 키 (가로/세로 중 현재 포커스된 캔버스)
+  // 기본값: 태블릿 가로
+  const [activeModeKey, setActiveModeKey] = useState<PopLayoutModeKey>("tablet_landscape");
+
+  // ========================================
+  // 선택 상태
+  // ========================================
   const [selectedSectionId, setSelectedSectionId] = useState<string | null>(null);
   const [selectedComponentId, setSelectedComponentId] = useState<string | null>(null);
 
-  // 선택된 섹션 객체
+  // ========================================
-  const selectedSection = selectedSectionId
+  // 파생 상태
-    ? layout.sections.find((s) => s.id === selectedSectionId) || null
+  // ========================================
-    : null;
   
+  // 선택된 섹션 정의
+  const selectedSection: PopSectionDefinition | null = useMemo(() => {
+    if (!selectedSectionId) return null;
+    return layout.sections[selectedSectionId] || null;
+  }, [layout.sections, selectedSectionId]);
+
+  // 현재 활성 모드의 섹션 ID 목록
+  const activeSectionIds = useMemo(() => {
+    return Object.keys(layout.layouts[activeModeKey].sectionPositions);
+  }, [layout.layouts, activeModeKey]);
+
+  // ========================================
   // 레이아웃 로드
-  // API는 이미 언래핑된 layout_data를 반환하므로 response 자체가 레이아웃 데이터
+  // ========================================
   useEffect(() => {
     const loadLayout = async () => {
       if (!selectedScreen?.screenId) return;
 
       setIsLoading(true);
       try {
-        // API가 layout_data 내용을 직접 반환함 (언래핑된 상태)
+        // API가 layout_data 내용을 직접 반환 (언래핑 상태)
         const loadedLayout = await screenApi.getLayoutPop(selectedScreen.screenId);
 
-        if (loadedLayout && loadedLayout.version === "pop-1.0") {
+        if (loadedLayout) {
-          // 유효한 POP 레이아웃
+          // v1 또는 v2 → v2로 변환
-          setLayout(loadedLayout as PopLayoutData);
+          const v2Layout = ensureV2Layout(loadedLayout);
-          console.log("POP 레이아웃 로드 성공:", loadedLayout.sections?.length || 0, "개 섹션");
+          setLayout(v2Layout);
-        } else if (loadedLayout && loadedLayout.sections) {
+          
-          // 버전 태그 없지만 sections 구조가 있으면 사용
+          const sectionCount = Object.keys(v2Layout.sections).length;
-          console.warn("버전 태그 없음, sections 구조 감지하여 사용");
+          const componentCount = Object.keys(v2Layout.components).length;
-          setLayout({
+          console.log(`POP v2 레이아웃 로드 성공: ${sectionCount}개 섹션, ${componentCount}개 컴포넌트`);
-            ...createEmptyPopLayout(),
+          
-            ...loadedLayout,
+          // v1에서 마이그레이션된 경우 알림
-            version: "pop-1.0",
+          if (!isV2Layout(loadedLayout)) {
-          } as PopLayoutData);
+            console.log("v1 → v2 자동 마이그레이션 완료");
+          }
         } else {
-          // 레이아웃 없음 - 빈 레이아웃 생성
+          // 레이아웃 없음 - 빈 v2 레이아웃 생성
-          console.log("POP 레이아웃 없음, 빈 레이아웃 생성");
+          console.log("POP 레이아웃 없음, 빈 v2 레이아웃 생성");
-          setLayout(createEmptyPopLayout());
+          setLayout(createEmptyPopLayoutV2());
         }
       } catch (error) {
         console.error("레이아웃 로드 실패:", error);
         toast.error("레이아웃을 불러오는데 실패했습니다");
-        setLayout(createEmptyPopLayout());
+        setLayout(createEmptyPopLayoutV2());
       } finally {
         setIsLoading(false);
       }
@@ -102,7 +148,9 @@ export default function PopDesigner({
     loadLayout();
   }, [selectedScreen?.screenId]);
 
+  // ========================================
   // 저장
+  // ========================================
   const handleSave = useCallback(async () => {
     if (!selectedScreen?.screenId) return;
 
@@ -119,111 +167,116 @@ export default function PopDesigner({
     }
   }, [selectedScreen?.screenId, layout]);
 
-  // 섹션 드롭 (팔레트 → 캔버스)
+  // ========================================
+  // 섹션 추가 (4모드 동기화)
+  // ========================================
   const handleDropSection = useCallback((gridPosition: GridPosition) => {
     const newId = `section-${Date.now()}`;
-    const newSection = createPopSection(newId, gridPosition);
     
-    setLayout((prev) => ({
+    setLayout((prev) => addSectionToV2Layout(prev, newId, gridPosition));
-      ...prev,
-      sections: [...prev.sections, newSection],
-    }));
     setSelectedSectionId(newId);
     setHasChanges(true);
   }, []);
 
-  // 컴포넌트 드롭 (팔레트 → 섹션)
+  // ========================================
+  // 컴포넌트 추가 (4모드 동기화)
+  // ========================================
   const handleDropComponent = useCallback(
     (sectionId: string, type: PopComponentType, gridPosition: GridPosition) => {
       const newId = `${type}-${Date.now()}`;
-      const newComponent = createPopComponent(newId, type, gridPosition);
       
-      setLayout((prev) => ({
+      setLayout((prev) => addComponentToV2Layout(prev, sectionId, newId, type, gridPosition));
-        ...prev,
-        sections: prev.sections.map((s) =>
-          s.id === sectionId
-            ? { ...s, components: [...s.components, newComponent] }
-            : s
-        ),
-      }));
       setSelectedComponentId(newId);
       setHasChanges(true);
     },
     []
   );
 
-  // 섹션 업데이트
+  // ========================================
-  const handleUpdateSection = useCallback(
+  // 섹션 정의 업데이트 (공유)
-    (id: string, updates: Partial<PopSectionData>) => {
+  // ========================================
+  const handleUpdateSectionDefinition = useCallback(
+    (sectionId: string, updates: Partial<PopSectionDefinition>) => {
       setLayout((prev) => ({
         ...prev,
-        sections: prev.sections.map((s) =>
+        sections: {
-          s.id === id ? { ...s, ...updates } : s
+          ...prev.sections,
-        ),
+          [sectionId]: {
+            ...prev.sections[sectionId],
+            ...updates,
+          },
+        },
       }));
       setHasChanges(true);
     },
     []
   );
 
-  // 섹션 삭제
+  // ========================================
-  const handleDeleteSection = useCallback((id: string) => {
+  // 섹션 위치 업데이트 (현재 모드만)
-    setLayout((prev) => ({
+  // ========================================
-      ...prev,
+  const handleUpdateSectionPosition = useCallback(
-      sections: prev.sections.filter((s) => s.id !== id),
+    (sectionId: string, position: GridPosition, modeKey?: PopLayoutModeKey) => {
-    }));
+      const targetMode = modeKey || activeModeKey;
+      setLayout((prev) => updateSectionPositionInMode(prev, targetMode, sectionId, position));
+      setHasChanges(true);
+    },
+    [activeModeKey]
+  );
+
+  // ========================================
+  // 컴포넌트 위치 업데이트 (현재 모드만)
+  // ========================================
+  const handleUpdateComponentPosition = useCallback(
+    (componentId: string, position: GridPosition, modeKey?: PopLayoutModeKey) => {
+      const targetMode = modeKey || activeModeKey;
+      setLayout((prev) => updateComponentPositionInMode(prev, targetMode, componentId, position));
+      setHasChanges(true);
+    },
+    [activeModeKey]
+  );
+
+  // ========================================
+  // 섹션 삭제 (4모드 동기화)
+  // ========================================
+  const handleDeleteSection = useCallback((sectionId: string) => {
+    setLayout((prev) => removeSectionFromV2Layout(prev, sectionId));
     setSelectedSectionId(null);
+    setSelectedComponentId(null);
     setHasChanges(true);
   }, []);
 
-  // 레이아웃 변경 (드래그/리사이즈)
+  // ========================================
-  const handleLayoutChange = useCallback((sections: PopSectionData[]) => {
+  // 컴포넌트 삭제 (4모드 동기화)
-    setLayout((prev) => ({
+  // ========================================
-      ...prev,
-      sections,
-    }));
-    setHasChanges(true);
-  }, []);
-
-  // 컴포넌트 업데이트
-  const handleUpdateComponent = useCallback(
-    (sectionId: string, componentId: string, updates: Partial<PopComponentData>) => {
-      setLayout((prev) => ({
-        ...prev,
-        sections: prev.sections.map((s) =>
-          s.id === sectionId
-            ? {
-                ...s,
-                components: s.components.map((c) =>
-                  c.id === componentId ? { ...c, ...updates } : c
-                ),
-              }
-            : s
-        ),
-      }));
-      setHasChanges(true);
-    },
-    []
-  );
-
-  // 컴포넌트 삭제
   const handleDeleteComponent = useCallback(
     (sectionId: string, componentId: string) => {
-      setLayout((prev) => ({
+      setLayout((prev) => removeComponentFromV2Layout(prev, sectionId, componentId));
-        ...prev,
-        sections: prev.sections.map((s) =>
-          s.id === sectionId
-            ? { ...s, components: s.components.filter((c) => c.id !== componentId) }
-            : s
-        ),
-      }));
       setSelectedComponentId(null);
       setHasChanges(true);
     },
     []
   );
 
+  // ========================================
+  // 디바이스 전환
+  // ========================================
+  const handleDeviceChange = useCallback((device: DeviceType) => {
+    setActiveDevice(device);
+    // 기본 모드 키 설정 (가로)
+    setActiveModeKey(device === "tablet" ? "tablet_landscape" : "mobile_landscape");
+  }, []);
+
+  // ========================================
+  // 모드 키 전환 (캔버스 포커스)
+  // ========================================
+  const handleModeKeyChange = useCallback((modeKey: PopLayoutModeKey) => {
+    setActiveModeKey(modeKey);
+  }, []);
+
+  // ========================================
   // 뒤로가기
+  // ========================================
   const handleBack = useCallback(() => {
     if (hasChanges) {
       if (confirm("저장하지 않은 변경사항이 있습니다. 나가시겠습니까?")) {
@@ -234,6 +287,63 @@ export default function PopDesigner({
     }
   }, [hasChanges, onBackToList]);
 
+  // ========================================
+  // Delete 키 삭제 기능
+  // ========================================
+  useEffect(() => {
+    const handleKeyDown = (e: KeyboardEvent) => {
+      // input/textarea 포커스 시 제외
+      const target = e.target as HTMLElement;
+      if (
+        target.tagName === "INPUT" ||
+        target.tagName === "TEXTAREA" ||
+        target.isContentEditable
+      ) {
+        return;
+      }
+
+      // Delete 또는 Backspace 키
+      if (e.key === "Delete" || e.key === "Backspace") {
+        e.preventDefault(); // 브라우저 뒤로가기 방지
+
+        // 컴포넌트가 선택되어 있으면 컴포넌트 삭제
+        if (selectedComponentId) {
+          // v2 구조: 컴포넌트가 속한 섹션을 sections의 componentIds에서 찾기
+          // (PopComponentDefinition에는 sectionId가 없으므로 섹션을 순회하여 찾음)
+          let foundSectionId: string | null = null;
+          for (const [sectionId, sectionDef] of Object.entries(layout.sections)) {
+            if (sectionDef.componentIds.includes(selectedComponentId)) {
+              foundSectionId = sectionId;
+              break;
+            }
+          }
+          
+          if (foundSectionId) {
+            handleDeleteComponent(foundSectionId, selectedComponentId);
+          }
+        }
+        // 컴포넌트가 선택되지 않았고 섹션이 선택되어 있으면 섹션 삭제
+        else if (selectedSectionId) {
+          handleDeleteSection(selectedSectionId);
+        }
+      }
+    };
+
+    window.addEventListener("keydown", handleKeyDown);
+    return () => {
+      window.removeEventListener("keydown", handleKeyDown);
+    };
+  }, [
+    selectedComponentId,
+    selectedSectionId,
+    layout.sections,
+    handleDeleteComponent,
+    handleDeleteSection,
+  ]);
+
+  // ========================================
+  // 로딩 상태
+  // ========================================
   if (isLoading) {
     return (
       <div className="flex h-screen items-center justify-center">
@@ -242,6 +352,9 @@ export default function PopDesigner({
     );
   }
 
+  // ========================================
+  // 렌더링
+  // ========================================
   return (
     <DndProvider backend={HTML5Backend}>
       <div className="flex h-screen flex-col bg-background">
@@ -261,11 +374,11 @@ export default function PopDesigner({
             )}
           </div>
 
-          {/* 중앙: 디바이스 전환 */}
+          {/* 중앙: 디바이스 전환 (가로/세로 전환 버튼 제거 - 캔버스 2개 동시 표시) */}
           <div className="flex items-center gap-2">
             <Tabs
               value={activeDevice}
-              onValueChange={(v) => setActiveDevice(v as DeviceType)}
+              onValueChange={(v) => handleDeviceChange(v as DeviceType)}
             >
               <TabsList className="h-8">
                 <TabsTrigger value="tablet" className="h-7 px-3 text-xs">
@@ -278,24 +391,6 @@ export default function PopDesigner({
                 </TabsTrigger>
               </TabsList>
             </Tabs>
-
-            <Button
-              variant="ghost"
-              size="sm"
-              onClick={() => setIsLandscape(!isLandscape)}
-              title={isLandscape ? "세로 모드로 전환" : "가로 모드로 전환"}
-            >
-              <RotateCcw className="h-4 w-4" />
-            </Button>
-
-            <Button
-              variant={showBothDevices ? "secondary" : "ghost"}
-              size="sm"
-              onClick={() => setShowBothDevices(!showBothDevices)}
-              title="나란히 보기"
-            >
-              <Columns2 className="h-4 w-4" />
-            </Button>
           </div>
 
           {/* 오른쪽: 저장 */}
@@ -322,9 +417,10 @@ export default function PopDesigner({
           >
             <PopPanel
               layout={layout}
+              activeModeKey={activeModeKey}
               selectedSectionId={selectedSectionId}
               selectedSection={selectedSection}
-              onUpdateSection={handleUpdateSection}
+              onUpdateSectionDefinition={handleUpdateSectionDefinition}
               onDeleteSection={handleDeleteSection}
               activeDevice={activeDevice}
             />
@@ -332,23 +428,22 @@ export default function PopDesigner({
 
           <ResizableHandle withHandle />
 
-          {/* 오른쪽: 캔버스 */}
+          {/* 오른쪽: 캔버스 (가로+세로 2개 동시 표시) */}
           <ResizablePanel defaultSize={80}>
             <PopCanvas
               layout={layout}
               activeDevice={activeDevice}
-              showBothDevices={showBothDevices}
+              activeModeKey={activeModeKey}
-              isLandscape={isLandscape}
+              onModeKeyChange={handleModeKeyChange}
               selectedSectionId={selectedSectionId}
               selectedComponentId={selectedComponentId}
               onSelectSection={setSelectedSectionId}
               onSelectComponent={setSelectedComponentId}
-              onUpdateSection={handleUpdateSection}
+              onUpdateSectionPosition={handleUpdateSectionPosition}
+              onUpdateComponentPosition={handleUpdateComponentPosition}
               onDeleteSection={handleDeleteSection}
-              onLayoutChange={handleLayoutChange}
               onDropSection={handleDropSection}
               onDropComponent={handleDropComponent}
-              onUpdateComponent={handleUpdateComponent}
               onDeleteComponent={handleDeleteComponent}
             />
           </ResizablePanel>

frontend/components/pop/designer/SectionGridV2.tsx

@@ -0,0 +1,373 @@
+"use client";
+
+import { useCallback, useMemo, useRef, useState, useEffect } from "react";
+import { useDrop } from "react-dnd";
+import GridLayout, { Layout } from "react-grid-layout";
+import { cn } from "@/lib/utils";
+import {
+  PopSectionDefinition,
+  PopComponentDefinition,
+  PopComponentType,
+  GridPosition,
+} from "./types/pop-layout";
+import { DND_ITEM_TYPES, DragItemComponent } from "./panels/PopPanel";
+import { Trash2, Move } from "lucide-react";
+import { Button } from "@/components/ui/button";
+
+import "react-grid-layout/css/styles.css";
+import "react-resizable/css/styles.css";
+
+// ========================================
+// Props
+// ========================================
+interface SectionGridV2Props {
+  sectionId: string;
+  sectionDef: PopSectionDefinition;
+  components: Record<string, PopComponentDefinition>;
+  componentPositions: Record<string, GridPosition>;
+  isActive: boolean;
+  selectedComponentId: string | null;
+  onSelectComponent: (id: string | null) => void;
+  onDropComponent: (sectionId: string, type: PopComponentType, gridPosition: GridPosition) => void;
+  onUpdateComponentPosition: (componentId: string, position: GridPosition) => void;
+  onDeleteComponent: (sectionId: string, componentId: string) => void;
+}
+
+// ========================================
+// 메인 컴포넌트
+// ========================================
+export function SectionGridV2({
+  sectionId,
+  sectionDef,
+  components,
+  componentPositions,
+  isActive,
+  selectedComponentId,
+  onSelectComponent,
+  onDropComponent,
+  onUpdateComponentPosition,
+  onDeleteComponent,
+}: SectionGridV2Props) {
+  const containerRef = useRef<HTMLDivElement>(null);
+  
+  // 이 섹션에 포함된 컴포넌트 ID 목록
+  const componentIds = sectionDef.componentIds || [];
+  
+  // 컨테이너 크기 측정
+  const [containerSize, setContainerSize] = useState({ width: 300, height: 200 });
+  
+  useEffect(() => {
+    const updateSize = () => {
+      if (containerRef.current) {
+        setContainerSize({
+          width: containerRef.current.offsetWidth,
+          height: containerRef.current.offsetHeight,
+        });
+      }
+    };
+    
+    updateSize();
+    
+    const resizeObserver = new ResizeObserver(updateSize);
+    if (containerRef.current) {
+      resizeObserver.observe(containerRef.current);
+    }
+    
+    return () => resizeObserver.disconnect();
+  }, []);
+
+  // 셀 크기 계산 - 고정 셀 크기 기반으로 자동 계산
+  const padding = 8; // p-2 = 8px
+  const gap = 4; // 고정 간격
+  const availableWidth = containerSize.width - padding * 2;
+  const availableHeight = containerSize.height - padding * 2;
+  
+  // 고정 셀 크기 (40px) 기반으로 열/행 수 자동 계산
+  const CELL_SIZE = 40;
+  const cols = Math.max(1, Math.floor((availableWidth + gap) / (CELL_SIZE + gap)));
+  const rows = Math.max(1, Math.floor((availableHeight + gap) / (CELL_SIZE + gap)));
+  const cellHeight = CELL_SIZE;
+
+  // GridLayout용 레이아웃 변환
+  const gridLayoutItems: Layout[] = useMemo(() => {
+    return componentIds
+      .map((compId) => {
+        const pos = componentPositions[compId];
+        if (!pos) return null;
+        
+        // 위치가 그리드 범위를 벗어나지 않도록 조정
+        const x = Math.min(Math.max(0, pos.col - 1), Math.max(0, cols - 1));
+        const y = Math.min(Math.max(0, pos.row - 1), Math.max(0, rows - 1));
+        const w = Math.min(Math.max(1, pos.colSpan), Math.max(1, cols - x));
+        const h = Math.min(Math.max(1, pos.rowSpan), Math.max(1, rows - y));
+        
+        return {
+          i: compId,
+          x,
+          y,
+          w,
+          h,
+          minW: 1,
+          minH: 1,
+        };
+      })
+      .filter((item): item is Layout => item !== null);
+  }, [componentIds, componentPositions, cols, rows]);
+
+  // 드래그 완료 핸들러
+  const handleDragStop = useCallback(
+    (layout: Layout[], oldItem: Layout, newItem: Layout) => {
+      const newPos: GridPosition = {
+        col: newItem.x + 1,
+        row: newItem.y + 1,
+        colSpan: newItem.w,
+        rowSpan: newItem.h,
+      };
+      
+      const oldPos = componentPositions[newItem.i];
+      if (!oldPos || oldPos.col !== newPos.col || oldPos.row !== newPos.row) {
+        onUpdateComponentPosition(newItem.i, newPos);
+      }
+    },
+    [componentPositions, onUpdateComponentPosition]
+  );
+
+  // 리사이즈 완료 핸들러
+  const handleResizeStop = useCallback(
+    (layout: Layout[], oldItem: Layout, newItem: Layout) => {
+      const newPos: GridPosition = {
+        col: newItem.x + 1,
+        row: newItem.y + 1,
+        colSpan: newItem.w,
+        rowSpan: newItem.h,
+      };
+      
+      const oldPos = componentPositions[newItem.i];
+      if (!oldPos || oldPos.colSpan !== newPos.colSpan || oldPos.rowSpan !== newPos.rowSpan) {
+        onUpdateComponentPosition(newItem.i, newPos);
+      }
+    },
+    [componentPositions, onUpdateComponentPosition]
+  );
+
+  // 빈 셀 찾기 (드롭 위치용)
+  const findEmptyCell = useCallback((): GridPosition => {
+    const occupied = new Set<string>();
+    
+    componentIds.forEach((compId) => {
+      const pos = componentPositions[compId];
+      if (!pos) return;
+      
+      for (let c = pos.col; c < pos.col + pos.colSpan; c++) {
+        for (let r = pos.row; r < pos.row + pos.rowSpan; r++) {
+          occupied.add(`${c}-${r}`);
+        }
+      }
+    });
+
+    // 빈 셀 찾기
+    for (let r = 1; r <= rows; r++) {
+      for (let c = 1; c <= cols; c++) {
+        if (!occupied.has(`${c}-${r}`)) {
+          return { col: c, row: r, colSpan: 1, rowSpan: 1 };
+        }
+      }
+    }
+
+    // 빈 셀 없으면 첫 번째 위치
+    return { col: 1, row: 1, colSpan: 1, rowSpan: 1 };
+  }, [componentIds, componentPositions, cols, rows]);
+
+  // 컴포넌트 드롭 핸들러
+  const [{ isOver, canDrop }, drop] = useDrop(
+    () => ({
+      accept: DND_ITEM_TYPES.COMPONENT,
+      drop: (item: DragItemComponent) => {
+        if (!isActive) return;
+        const emptyCell = findEmptyCell();
+        onDropComponent(sectionId, item.componentType, emptyCell);
+        return { dropped: true };
+      },
+      canDrop: () => isActive,
+      collect: (monitor) => ({
+        isOver: monitor.isOver(),
+        canDrop: monitor.canDrop(),
+      }),
+    }),
+    [isActive, sectionId, findEmptyCell, onDropComponent]
+  );
+
+  return (
+    <div
+      ref={(node) => {
+        containerRef.current = node;
+        drop(node);
+      }}
+      className={cn(
+        "relative h-full w-full p-2 transition-colors",
+        isOver && canDrop && "bg-blue-50"
+      )}
+      onClick={(e) => {
+        e.stopPropagation();
+        onSelectComponent(null);
+      }}
+      onMouseDown={(e) => {
+        e.stopPropagation();
+      }}
+    >
+      {/* 빈 상태 안내 텍스트 */}
+      {componentIds.length === 0 && (
+        <div className="pointer-events-none absolute inset-0 z-10 flex items-center justify-center">
+          <span
+            className={cn(
+              "rounded bg-white/80 px-2 py-1 text-xs",
+              isOver && canDrop ? "font-medium text-primary" : "text-gray-400"
+            )}
+          >
+            {isOver && canDrop ? "여기에 놓으세요" : "컴포넌트를 드래그하세요"}
+          </span>
+        </div>
+      )}
+
+      {/* 컴포넌트 GridLayout */}
+      {componentIds.length > 0 && availableWidth > 0 && cols > 0 && (
+        <GridLayout
+          className="layout relative z-10"
+          layout={gridLayoutItems}
+          cols={cols}
+          rowHeight={cellHeight}
+          width={availableWidth}
+          margin={[gap, gap]}
+          containerPadding={[0, 0]}
+          onDragStop={handleDragStop}
+          onResizeStop={handleResizeStop}
+          isDraggable={isActive}
+          isResizable={isActive}
+          compactType={null}
+          preventCollision={false}
+          useCSSTransforms={true}
+          draggableHandle=".component-drag-handle"
+          resizeHandles={["se", "e", "s"]}
+        >
+          {componentIds.map((compId) => {
+            const compDef = components[compId];
+            if (!compDef) return null;
+
+            return (
+              <div
+                key={compId}
+                className={cn(
+                  "group relative flex flex-col overflow-hidden rounded border bg-white text-xs transition-all",
+                  selectedComponentId === compId
+                    ? "border-primary ring-2 ring-primary/30"
+                    : "border-gray-200 hover:border-gray-400"
+                )}
+                onClick={(e) => {
+                  e.stopPropagation();
+                  onSelectComponent(compId);
+                }}
+                onMouseDown={(e) => e.stopPropagation()}
+              >
+                {/* 드래그 핸들 바 */}
+                <div className="component-drag-handle flex h-5 cursor-move items-center justify-center border-b bg-gray-50 opacity-60 transition-opacity hover:opacity-100">
+                  <Move className="h-3 w-3 text-gray-400" />
+                </div>
+
+                {/* 컴포넌트 내용 */}
+                <div className="flex flex-1 items-center justify-center p-1">
+                  <ComponentPreviewV2 component={compDef} />
+                </div>
+
+                {/* 삭제 버튼 */}
+                {selectedComponentId === compId && isActive && (
+                  <Button
+                    variant="ghost"
+                    size="icon"
+                    className="absolute -right-2 -top-2 z-10 h-5 w-5 rounded-full bg-white text-destructive shadow hover:bg-destructive/10"
+                    onClick={(e) => {
+                      e.stopPropagation();
+                      onDeleteComponent(sectionId, compId);
+                    }}
+                  >
+                    <Trash2 className="h-3 w-3" />
+                  </Button>
+                )}
+              </div>
+            );
+          })}
+        </GridLayout>
+      )}
+    </div>
+  );
+}
+
+// ========================================
+// 컴포넌트 미리보기
+// ========================================
+interface ComponentPreviewV2Props {
+  component: PopComponentDefinition;
+}
+
+function ComponentPreviewV2({ component }: ComponentPreviewV2Props) {
+  const { type, label } = component;
+
+  const renderPreview = () => {
+    switch (type) {
+      case "pop-field":
+        return (
+          <div className="flex w-full flex-col gap-1">
+            <span className="text-[10px] text-gray-500">{label || "필드"}</span>
+            <div className="h-6 w-full rounded border border-gray-200 bg-gray-50" />
+          </div>
+        );
+      case "pop-button":
+        return (
+          <div className="flex h-8 w-full items-center justify-center rounded bg-primary/10 font-medium text-primary">
+            {label || "버튼"}
+          </div>
+        );
+      case "pop-list":
+        return (
+          <div className="flex w-full flex-col gap-0.5">
+            <span className="text-[10px] text-gray-500">{label || "리스트"}</span>
+            <div className="h-3 w-full rounded bg-gray-100" />
+            <div className="h-3 w-3/4 rounded bg-gray-100" />
+            <div className="h-3 w-full rounded bg-gray-100" />
+          </div>
+        );
+      case "pop-indicator":
+        return (
+          <div className="flex w-full flex-col items-center gap-1">
+            <span className="text-[10px] text-gray-500">{label || "KPI"}</span>
+            <span className="text-lg font-bold text-primary">0</span>
+          </div>
+        );
+      case "pop-scanner":
+        return (
+          <div className="flex w-full flex-col items-center gap-1">
+            <div className="flex h-8 w-8 items-center justify-center rounded border-2 border-dashed border-gray-300">
+              <span className="text-[8px] text-gray-400">QR</span>
+            </div>
+            <span className="text-[10px] text-gray-500">{label || "스캐너"}</span>
+          </div>
+        );
+      case "pop-numpad":
+        return (
+          <div className="grid w-full grid-cols-3 gap-0.5">
+            {[1, 2, 3, 4, 5, 6, 7, 8, 9, "C", 0, "OK"].map((key) => (
+              <div
+                key={key}
+                className="flex h-4 items-center justify-center rounded bg-gray-100 text-[8px]"
+              >
+                {key}
+              </div>
+            ))}
+          </div>
+        );
+      default:
+        return <span className="text-gray-500">{label || type}</span>;
+    }
+  };
+
+  return <div className="w-full overflow-hidden">{renderPreview()}</div>;
+}

frontend/components/pop/designer/panels/PopPanel.tsx

@@ -34,18 +34,21 @@ import {
 } from "lucide-react";
 import { cn } from "@/lib/utils";
 import {
-  PopLayoutData,
+  PopLayoutDataV2,
-  PopSectionData,
+  PopLayoutModeKey,
+  PopSectionDefinition,
   PopComponentType,
+  MODE_RESOLUTIONS,
 } from "../types/pop-layout";
 
+// ========================================
 // 드래그 아이템 타입
+// ========================================
 export const DND_ITEM_TYPES = {
   SECTION: "section",
   COMPONENT: "component",
 } as const;
 
-// 드래그 아이템 데이터
 export interface DragItemSection {
   type: typeof DND_ITEM_TYPES.SECTION;
 }
@@ -55,16 +58,9 @@ export interface DragItemComponent {
   componentType: PopComponentType;
 }
 
-interface PopPanelProps {
+// ========================================
-  layout: PopLayoutData;
-  selectedSectionId: string | null;
-  selectedSection: PopSectionData | null;
-  onUpdateSection: (id: string, updates: Partial<PopSectionData>) => void;
-  onDeleteSection: (id: string) => void;
-  activeDevice: "mobile" | "tablet";
-}
-
 // 컴포넌트 팔레트 정의
+// ========================================
 const COMPONENT_PALETTE: {
   type: PopComponentType;
   label: string;
@@ -109,16 +105,39 @@ const COMPONENT_PALETTE: {
   },
 ];
 
+// ========================================
+// Props
+// ========================================
+interface PopPanelProps {
+  layout: PopLayoutDataV2;
+  activeModeKey: PopLayoutModeKey;
+  selectedSectionId: string | null;
+  selectedSection: PopSectionDefinition | null;
+  onUpdateSectionDefinition: (id: string, updates: Partial<PopSectionDefinition>) => void;
+  onDeleteSection: (id: string) => void;
+  activeDevice: "mobile" | "tablet";
+}
+
+// ========================================
+// 메인 컴포넌트
+// ========================================
 export function PopPanel({
   layout,
+  activeModeKey,
   selectedSectionId,
   selectedSection,
-  onUpdateSection,
+  onUpdateSectionDefinition,
   onDeleteSection,
   activeDevice,
 }: PopPanelProps) {
   const [activeTab, setActiveTab] = useState<string>("components");
 
+  // 현재 모드의 섹션 위치
+  const currentModeLayout = layout.layouts[activeModeKey];
+  const selectedSectionPosition = selectedSectionId 
+    ? currentModeLayout.sectionPositions[selectedSectionId] 
+    : null;
+
   return (
     <div className="flex h-full flex-col">
       <Tabs
@@ -140,6 +159,16 @@ export function PopPanel({
         {/* 컴포넌트 탭 */}
         <TabsContent value="components" className="flex-1 overflow-auto p-2">
           <div className="space-y-4">
+            {/* 현재 모드 표시 */}
+            <div className="rounded-lg bg-muted p-2">
+              <p className="text-xs font-medium text-muted-foreground">
+                편집 중: {getModeLabel(activeModeKey)}
+              </p>
+              <p className="text-[10px] text-muted-foreground">
+                {MODE_RESOLUTIONS[activeModeKey].width} x {MODE_RESOLUTIONS[activeModeKey].height}
+              </p>
+            </div>
+
             {/* 섹션 드래그 아이템 */}
             <div>
               <h4 className="mb-2 text-xs font-medium text-muted-foreground">
@@ -176,12 +205,15 @@ export function PopPanel({
 
         {/* 편집 탭 */}
         <TabsContent value="edit" className="flex-1 overflow-auto p-2">
-          {selectedSection ? (
+          {selectedSection && selectedSectionPosition ? (
-            <SectionEditor
+            <SectionEditorV2
               section={selectedSection}
-              onUpdate={(updates) => onUpdateSection(selectedSection.id, updates)}
+              position={selectedSectionPosition}
+              activeModeKey={activeModeKey}
+              onUpdateDefinition={(updates) => 
+                onUpdateSectionDefinition(selectedSection.id, updates)
+              }
               onDelete={() => onDeleteSection(selectedSection.id)}
-              activeDevice={activeDevice}
             />
           ) : (
             <div className="flex h-40 items-center justify-center text-sm text-muted-foreground">
@@ -194,7 +226,22 @@ export function PopPanel({
   );
 }
 
+// ========================================
+// 모드 라벨 헬퍼
+// ========================================
+function getModeLabel(modeKey: PopLayoutModeKey): string {
+  const labels: Record<PopLayoutModeKey, string> = {
+    tablet_landscape: "태블릿 가로",
+    tablet_portrait: "태블릿 세로",
+    mobile_landscape: "모바일 가로",
+    mobile_portrait: "모바일 세로",
+  };
+  return labels[modeKey];
+}
+
+// ========================================
 // 드래그 가능한 섹션 아이템
+// ========================================
 function DraggableSectionItem() {
   const [{ isDragging }, drag] = useDrag(() => ({
     type: DND_ITEM_TYPES.SECTION,
@@ -223,7 +270,9 @@ function DraggableSectionItem() {
   );
 }
 
+// ========================================
 // 드래그 가능한 컴포넌트 아이템
+// ========================================
 interface DraggableComponentItemProps {
   type: PopComponentType;
   label: string;
@@ -264,28 +313,31 @@ function DraggableComponentItem({
   );
 }
 
-// 섹션 편집기
+// ========================================
-interface SectionEditorProps {
+// v2 섹션 편집기
-  section: PopSectionData;
+// ========================================
-  onUpdate: (updates: Partial<PopSectionData>) => void;
+interface SectionEditorV2Props {
+  section: PopSectionDefinition;
+  position: { col: number; row: number; colSpan: number; rowSpan: number };
+  activeModeKey: PopLayoutModeKey;
+  onUpdateDefinition: (updates: Partial<PopSectionDefinition>) => void;
   onDelete: () => void;
-  activeDevice: "mobile" | "tablet";
 }
 
-function SectionEditor({
+function SectionEditorV2({
   section,
-  onUpdate,
+  position,
+  activeModeKey,
+  onUpdateDefinition,
   onDelete,
-  activeDevice,
+}: SectionEditorV2Props) {
-}: SectionEditorProps) {
   const [isGridOpen, setIsGridOpen] = useState(true);
-  const [isMobileOpen, setIsMobileOpen] = useState(false);
 
   return (
     <div className="space-y-4">
       {/* 섹션 기본 정보 */}
       <div className="flex items-center justify-between">
-        <span className="text-sm font-medium">섹션</span>
+        <span className="text-sm font-medium">섹션 설정</span>
         <Button
           variant="ghost"
           size="icon"
@@ -298,19 +350,22 @@ function SectionEditor({
 
       {/* 라벨 */}
       <div className="space-y-2">
-        <Label className="text-xs">라벨</Label>
+        <Label className="text-xs">라벨 (공유)</Label>
         <Input
           value={section.label || ""}
-          onChange={(e) => onUpdate({ label: e.target.value })}
+          onChange={(e) => onUpdateDefinition({ label: e.target.value })}
           placeholder="섹션 이름"
           className="h-8 text-xs"
         />
+        <p className="text-[10px] text-muted-foreground">
+          라벨은 4개 모드에서 공유됩니다
+        </p>
       </div>
 
-      {/* 그리드 위치/크기 */}
+      {/* 현재 모드 위치 (읽기 전용 - 드래그로 조정) */}
       <Collapsible open={isGridOpen} onOpenChange={setIsGridOpen}>
         <CollapsibleTrigger className="flex w-full items-center justify-between py-2 text-sm font-medium">
-          그리드 위치
+          현재 모드 위치
           <ChevronDown
             className={cn(
               "h-4 w-4 transition-transform",
@@ -319,87 +374,44 @@ function SectionEditor({
           />
         </CollapsibleTrigger>
         <CollapsibleContent className="space-y-3 pt-2">
-          <div className="grid grid-cols-2 gap-2">
+          <div className="rounded-lg bg-muted p-3">
-            <div className="space-y-1">
+            <p className="mb-2 text-xs font-medium">{getModeLabel(activeModeKey)}</p>
-              <Label className="text-xs">시작 열</Label>
+            <div className="grid grid-cols-2 gap-2 text-xs">
-              <Input
+              <div className="flex justify-between">
-                type="number"
+                <span className="text-muted-foreground">시작 열:</span>
-                min={1}
+                <span className="font-medium">{position.col}</span>
-                max={24}
+              </div>
-                value={section.grid.col}
+              <div className="flex justify-between">
-                onChange={(e) =>
+                <span className="text-muted-foreground">시작 행:</span>
-                  onUpdate({
+                <span className="font-medium">{position.row}</span>
-                    grid: { ...section.grid, col: parseInt(e.target.value) || 1 },
+              </div>
-                  })
+              <div className="flex justify-between">
-                }
+                <span className="text-muted-foreground">열 크기:</span>
-                className="h-8 text-xs"
+                <span className="font-medium">{position.colSpan}</span>
-              />
+              </div>
-            </div>
+              <div className="flex justify-between">
-            <div className="space-y-1">
+                <span className="text-muted-foreground">행 크기:</span>
-              <Label className="text-xs">시작 행</Label>
+                <span className="font-medium">{position.rowSpan}</span>
-              <Input
+              </div>
-                type="number"
-                min={1}
-                value={section.grid.row}
-                onChange={(e) =>
-                  onUpdate({
-                    grid: { ...section.grid, row: parseInt(e.target.value) || 1 },
-                  })
-                }
-                className="h-8 text-xs"
-              />
-            </div>
-            <div className="space-y-1">
-              <Label className="text-xs">열 크기</Label>
-              <Input
-                type="number"
-                min={1}
-                max={24}
-                value={section.grid.colSpan}
-                onChange={(e) =>
-                  onUpdate({
-                    grid: {
-                      ...section.grid,
-                      colSpan: parseInt(e.target.value) || 1,
-                    },
-                  })
-                }
-                className="h-8 text-xs"
-              />
-            </div>
-            <div className="space-y-1">
-              <Label className="text-xs">행 크기</Label>
-              <Input
-                type="number"
-                min={1}
-                value={section.grid.rowSpan}
-                onChange={(e) =>
-                  onUpdate({
-                    grid: {
-                      ...section.grid,
-                      rowSpan: parseInt(e.target.value) || 1,
-                    },
-                  })
-                }
-                className="h-8 text-xs"
-              />
             </div>
           </div>
-          <p className="text-xs text-muted-foreground">
+          <p className="text-[10px] text-muted-foreground">
-            캔버스는 24열 그리드입니다
+            위치/크기는 캔버스에서 드래그하여 조정하세요.
+            각 모드(가로/세로)별로 별도 저장됩니다.
           </p>
         </CollapsibleContent>
       </Collapsible>
 
       {/* 내부 그리드 설정 */}
       <div className="space-y-3">
+        <h4 className="text-sm font-medium">내부 그리드 (공유)</h4>
         <div className="grid grid-cols-2 gap-2">
           <div className="space-y-1">
             <Label className="text-xs">내부 열 수</Label>
             <Select
               value={String(section.innerGrid.columns)}
               onValueChange={(v) =>
-                onUpdate({
+                onUpdateDefinition({
                   innerGrid: { ...section.innerGrid, columns: parseInt(v) },
                 })
               }
@@ -421,7 +433,7 @@ function SectionEditor({
             <Select
               value={String(section.innerGrid.rows)}
               onValueChange={(v) =>
-                onUpdate({
+                onUpdateDefinition({
                   innerGrid: { ...section.innerGrid, rows: parseInt(v) },
                 })
               }
@@ -440,70 +452,33 @@ function SectionEditor({
             </Select>
           </div>
         </div>
-        <p className="text-xs text-muted-foreground">
+        <p className="text-[10px] text-muted-foreground">
-          섹션 내부에서 컴포넌트를 배치할 그리드 (점으로 표시)
+          내부 그리드 설정은 4개 모드에서 공유됩니다
         </p>
       </div>
 
-      {/* 모바일 전용 설정 */}
+      {/* 컴포넌트 목록 */}
-      <Collapsible open={isMobileOpen} onOpenChange={setIsMobileOpen}>
+      <div className="space-y-2">
-        <CollapsibleTrigger className="flex w-full items-center justify-between py-2 text-sm font-medium">
+        <h4 className="text-sm font-medium">
-          모바일 전용 설정
+          포함된 컴포넌트 ({section.componentIds.length}개)
-          <ChevronDown
+        </h4>
-            className={cn(
+        {section.componentIds.length > 0 ? (
-              "h-4 w-4 transition-transform",
+          <div className="space-y-1">
-              isMobileOpen && "rotate-180"
+            {section.componentIds.map((compId) => (
-            )}
+              <div
-          />
+                key={compId}
-        </CollapsibleTrigger>
+                className="rounded border bg-muted/50 px-2 py-1 text-xs"
-        <CollapsibleContent className="space-y-3 pt-2">
+              >
-          <div className="grid grid-cols-2 gap-2">
+                {compId}
-            <div className="space-y-1">
+              </div>
-              <Label className="text-xs">모바일 열 크기</Label>
+            ))}
-              <Input
-                type="number"
-                min={1}
-                max={4}
-                value={section.mobileGrid?.colSpan || section.grid.colSpan}
-                onChange={(e) =>
-                  onUpdate({
-                    mobileGrid: {
-                      col: section.mobileGrid?.col || 1,
-                      row: section.mobileGrid?.row || section.grid.row,
-                      colSpan: parseInt(e.target.value) || 4,
-                      rowSpan:
-                        section.mobileGrid?.rowSpan || section.grid.rowSpan,
-                    },
-                  })
-                }
-                className="h-8 text-xs"
-              />
-            </div>
-            <div className="space-y-1">
-              <Label className="text-xs">모바일 행 크기</Label>
-              <Input
-                type="number"
-                min={1}
-                value={section.mobileGrid?.rowSpan || section.grid.rowSpan}
-                onChange={(e) =>
-                  onUpdate({
-                    mobileGrid: {
-                      col: section.mobileGrid?.col || 1,
-                      row: section.mobileGrid?.row || section.grid.row,
-                      colSpan: section.mobileGrid?.colSpan || 4,
-                      rowSpan: parseInt(e.target.value) || 1,
-                    },
-                  })
-                }
-                className="h-8 text-xs"
-              />
-            </div>
           </div>
+        ) : (
           <p className="text-xs text-muted-foreground">
-            모바일에서는 4열 그리드로 자동 변환됩니다
+            아직 컴포넌트가 없습니다
           </p>
-        </CollapsibleContent>
+        )}
-      </Collapsible>
+      </div>
     </div>
   );
 }

frontend/components/pop/designer/types/pop-layout.ts

@@ -1,21 +1,209 @@
 // POP 디자이너 레이아웃 타입 정의
 // 그리드 기반 반응형 레이아웃 (픽셀 좌표 없음, 그리드 셀 기반)
+// v2.0: 4모드 레이아웃 지원 (태블릿 가로/세로, 모바일 가로/세로)
+
+// ========================================
+// 레이아웃 모드 키 (4가지)
+// ========================================
+export type PopLayoutModeKey =
+  | "tablet_landscape"   // 태블릿 가로 (1024x768)
+  | "tablet_portrait"    // 태블릿 세로 (768x1024)
+  | "mobile_landscape"   // 모바일 가로 (667x375)
+  | "mobile_portrait";   // 모바일 세로 (375x667)
 
 /**
- * POP 레이아웃 전체 데이터
+ * 모드별 해상도 상수
- * - 캔버스는 12열 그리드
- * - 섹션은 그리드 셀 위치/크기로 배치
- * - 컴포넌트는 섹션 내부 그리드에 배치
  */
-export interface PopLayoutData {
+export const MODE_RESOLUTIONS: Record<PopLayoutModeKey, { width: number; height: number }> = {
+  tablet_landscape: { width: 1024, height: 768 },
+  tablet_portrait: { width: 768, height: 1024 },
+  mobile_landscape: { width: 667, height: 375 },
+  mobile_portrait: { width: 375, height: 667 },
+};
+
+// ========================================
+// v1.0 레이아웃 (기존 - 하위 호환)
+// ========================================
+
+/**
+ * POP 레이아웃 v1.0 (기존 구조)
+ * - 단일 sections 배열로 모든 모드 공유
+ * @deprecated v2.0 사용 권장
+ */
+export interface PopLayoutDataV1 {
   version: "pop-1.0";
-  layoutMode: "grid"; // 그리드 기반 (반응형)
+  layoutMode: "grid";
   deviceTarget: PopDeviceTarget;
-  canvasGrid: PopCanvasGrid; // 캔버스 그리드 설정
+  canvasGrid: PopCanvasGrid;
-  sections: PopSectionData[]; // 섹션 목록
+  sections: PopSectionDataV1[];
   metadata?: PopLayoutMetadata;
 }
 
+// ========================================
+// v2.0 레이아웃 (신규)
+// ========================================
+
+/**
+ * POP 레이아웃 v2.0
+ * - 4개 모드별 섹션/컴포넌트 위치 분리
+ * - 섹션/컴포넌트 정의는 공유
+ * - 3단계 데이터 흐름 지원
+ */
+export interface PopLayoutDataV2 {
+  version: "pop-2.0";
+  
+  // 4개 모드별 레이아웃 (위치/크기만)
+  layouts: {
+    tablet_landscape: PopModeLayout;
+    tablet_portrait: PopModeLayout;
+    mobile_landscape: PopModeLayout;
+    mobile_portrait: PopModeLayout;
+  };
+  
+  // 공유 섹션 정의 (ID → 정의)
+  sections: Record<string, PopSectionDefinition>;
+  
+  // 공유 컴포넌트 정의 (ID → 정의)
+  components: Record<string, PopComponentDefinition>;
+  
+  // 3단계 데이터 흐름
+  dataFlow: PopDataFlow;
+  
+  // 전역 설정
+  settings: PopGlobalSettings;
+  
+  // 메타데이터
+  metadata?: PopLayoutMetadata;
+}
+
+/**
+ * 모드별 레이아웃 (위치/크기만 저장)
+ */
+export interface PopModeLayout {
+  // 섹션별 위치 (섹션 ID → 위치)
+  sectionPositions: Record<string, GridPosition>;
+  // 컴포넌트별 위치 (컴포넌트 ID → 위치) - 섹션 내부 그리드 기준
+  componentPositions: Record<string, GridPosition>;
+}
+
+/**
+ * 공유 섹션 정의 (위치 제외)
+ */
+export interface PopSectionDefinition {
+  id: string;
+  label?: string;
+  // 이 섹션에 포함된 컴포넌트 ID 목록
+  componentIds: string[];
+  // 내부 그리드 설정
+  innerGrid: PopInnerGrid;
+  // 데이터 소스 (섹션 레벨)
+  dataSource?: PopDataSource;
+  // 섹션 내 컴포넌트 간 연결 (Level 1)
+  connections?: PopConnection[];
+  // 스타일
+  style?: PopSectionStyle;
+}
+
+/**
+ * 공유 컴포넌트 정의 (위치 제외)
+ */
+export interface PopComponentDefinition {
+  id: string;
+  type: PopComponentType;
+  label?: string;
+  // 데이터 바인딩
+  dataBinding?: PopDataBinding;
+  // 스타일 프리셋
+  style?: PopStylePreset;
+  // 컴포넌트별 설정
+  config?: PopComponentConfig;
+}
+
+/**
+ * 데이터 소스 설정
+ */
+export interface PopDataSource {
+  type: "api" | "static" | "parent";
+  endpoint?: string;
+  params?: Record<string, any>;
+  staticData?: any[];
+}
+
+/**
+ * 컴포넌트/섹션 간 연결
+ */
+export interface PopConnection {
+  from: string;        // 소스 ID (컴포넌트 또는 섹션)
+  to: string;          // 타겟 ID
+  trigger: PopTrigger; // 트리거 이벤트
+  action: PopAction;   // 수행할 액션
+}
+
+export type PopTrigger = 
+  | "onChange"    // 값 변경 시
+  | "onSubmit"    // 제출 시
+  | "onClick"     // 클릭 시
+  | "onScan"      // 스캔 완료 시
+  | "onSelect";   // 선택 시
+
+export type PopAction =
+  | { type: "setValue"; targetField: string }      // 값 설정
+  | { type: "filter"; filterField: string }        // 필터링
+  | { type: "refresh" }                            // 새로고침
+  | { type: "navigate"; screenId: number }         // 화면 이동
+  | { type: "api"; endpoint: string; method: string }; // API 호출
+
+/**
+ * 3단계 데이터 흐름
+ */
+export interface PopDataFlow {
+  // Level 2: 섹션 간 연결
+  sectionConnections: PopConnection[];
+  
+  // Level 3: 화면 로드 시 파라미터 수신
+  onScreenLoad?: {
+    paramMapping: Record<string, string>; // URL 파라미터 → 컴포넌트 ID
+  };
+  
+  // Level 3: 다음 화면으로 데이터 전달
+  navigationOutput?: {
+    screenId: number;
+    paramMapping: Record<string, string>; // 컴포넌트 ID → URL 파라미터명
+  };
+}
+
+/**
+ * 전역 설정
+ */
+export interface PopGlobalSettings {
+  // 최소 터치 타겟 크기 (px)
+  touchTargetMin: number; // 기본 48px, 산업용 60px
+  // 모드 (일반/산업용)
+  mode: "normal" | "industrial";
+  // 캔버스 그리드 설정
+  canvasGrid: PopCanvasGrid;
+}
+
+// ========================================
+// 통합 타입 (v1 또는 v2)
+// ========================================
+
+/**
+ * POP 레이아웃 데이터 (v1 또는 v2)
+ */
+export type PopLayoutData = PopLayoutDataV1 | PopLayoutDataV2;
+
+/**
+ * 버전 체크 타입 가드
+ */
+export function isV2Layout(data: PopLayoutData): data is PopLayoutDataV2 {
+  return data.version === "pop-2.0";
+}
+
+export function isV1Layout(data: PopLayoutData): data is PopLayoutDataV1 {
+  return data.version === "pop-1.0";
+}
+
 /**
  * 캔버스 그리드 설정
  */
@@ -43,34 +231,53 @@ export interface PopLayoutMetadata {
 
 /**
  * 그리드 위치/크기
+ * - col/row: 1-based 시작 위치
+ * - colSpan/rowSpan: 차지하는 칸 수
  */
 export interface GridPosition {
-  col: number;   // 시작 열 (1-based)
+  col: number;      // 시작 열 (1-based)
-  row: number;   // 시작 행 (1-based)
+  row: number;      // 시작 행 (1-based)
-  colSpan: number; // 열 개수
+  colSpan: number;  // 열 개수
-  rowSpan: number; // 행 개수
+  rowSpan: number;  // 행 개수
+}
+
+// ========================================
+// v1 섹션/컴포넌트 타입 (기존 구조)
+// ========================================
+
+/**
+ * 섹션 데이터 v1 (기존 구조 - 위치 포함)
+ * @deprecated v2에서는 PopSectionDefinition 사용
+ */
+export interface PopSectionDataV1 {
+  id: string;
+  label?: string;
+  grid: GridPosition;
+  mobileGrid?: GridPosition;
+  innerGrid: PopInnerGrid;
+  components: PopComponentDataV1[];
+  style?: PopSectionStyle;
 }
 
 /**
- * 섹션 데이터
+ * 컴포넌트 데이터 v1 (기존 구조 - 위치 포함)
- * - 캔버스 그리드 위에 배치
+ * @deprecated v2에서는 PopComponentDefinition 사용
- * - 내부에 컴포넌트들을 가짐
  */
-export interface PopSectionData {
+export interface PopComponentDataV1 {
   id: string;
-  label?: string;
+  type: PopComponentType;
-  // 그리드 위치 (12열 캔버스 기준)
   grid: GridPosition;
-  // 모바일용 그리드 위치 (선택, 없으면 자동 조정)
   mobileGrid?: GridPosition;
-  // 내부 그리드 설정
+  label?: string;
-  innerGrid: PopInnerGrid;
+  dataBinding?: PopDataBinding;
-  // 섹션 내 컴포넌트들
+  style?: PopStylePreset;
-  components: PopComponentData[];
+  config?: PopComponentConfig;
-  // 스타일
-  style?: PopSectionStyle;
 }
 
+// 하위 호환을 위한 alias
+export type PopSectionData = PopSectionDataV1;
+export type PopComponentData = PopComponentDataV1;
+
 /**
  * 섹션 내부 그리드 설정
  */
@@ -311,10 +518,15 @@ export const DEFAULT_INNER_GRID: PopInnerGrid = {
   gap: 4,
 };
 
+// ========================================
+// v1 생성 함수 (기존 - 하위 호환)
+// ========================================
+
 /**
- * 빈 레이아웃 생성
+ * 빈 v1 레이아웃 생성
+ * @deprecated createEmptyPopLayoutV2 사용 권장
  */
-export const createEmptyPopLayout = (): PopLayoutData => ({
+export const createEmptyPopLayoutV1 = (): PopLayoutDataV1 => ({
   version: "pop-1.0",
   layoutMode: "grid",
   deviceTarget: "both",
@@ -322,13 +534,16 @@ export const createEmptyPopLayout = (): PopLayoutData => ({
   sections: [],
 });
 
+// 하위 호환을 위한 alias
+export const createEmptyPopLayout = createEmptyPopLayoutV1;
+
 /**
- * 새 섹션 생성
+ * 새 섹션 생성 (v1)
  */
 export const createPopSection = (
   id: string,
   grid: GridPosition = { col: 1, row: 1, colSpan: 3, rowSpan: 4 }
-): PopSectionData => ({
+): PopSectionDataV1 => ({
   id,
   grid,
   innerGrid: { ...DEFAULT_INNER_GRID },
@@ -340,24 +555,398 @@ export const createPopSection = (
 });
 
 /**
- * 새 컴포넌트 생성
+ * 새 컴포넌트 생성 (v1)
  */
 export const createPopComponent = (
   id: string,
   type: PopComponentType,
   grid: GridPosition = { col: 1, row: 1, colSpan: 1, rowSpan: 1 },
   label?: string
-): PopComponentData => ({
+): PopComponentDataV1 => ({
   id,
   type,
   grid,
   label,
 });
 
-// ===== 타입 가드 =====
+// ========================================
+// v2 생성 함수
+// ========================================
 
-export const isPopField = (comp: PopComponentData): boolean =>
+/**
+ * 빈 v2 레이아웃 생성
+ */
+export const createEmptyPopLayoutV2 = (): PopLayoutDataV2 => ({
+  version: "pop-2.0",
+  layouts: {
+    tablet_landscape: { sectionPositions: {}, componentPositions: {} },
+    tablet_portrait: { sectionPositions: {}, componentPositions: {} },
+    mobile_landscape: { sectionPositions: {}, componentPositions: {} },
+    mobile_portrait: { sectionPositions: {}, componentPositions: {} },
+  },
+  sections: {},
+  components: {},
+  dataFlow: {
+    sectionConnections: [],
+  },
+  settings: {
+    touchTargetMin: 48,
+    mode: "normal",
+    canvasGrid: { ...DEFAULT_CANVAS_GRID },
+  },
+});
+
+/**
+ * v2 섹션 정의 생성
+ */
+export const createSectionDefinition = (
+  id: string,
+  label?: string
+): PopSectionDefinition => ({
+  id,
+  label,
+  componentIds: [],
+  innerGrid: { ...DEFAULT_INNER_GRID },
+  style: {
+    showBorder: true,
+    padding: "small",
+  },
+});
+
+/**
+ * v2 컴포넌트 정의 생성
+ */
+export const createComponentDefinition = (
+  id: string,
+  type: PopComponentType,
+  label?: string
+): PopComponentDefinition => ({
+  id,
+  type,
+  label,
+});
+
+// ========================================
+// 마이그레이션 함수 (v1 → v2)
+// ========================================
+
+/**
+ * v1 레이아웃을 v2로 마이그레이션
+ * - 기존 섹션/컴포넌트를 tablet_landscape 기준으로 4모드에 복제
+ * - 정의와 위치를 분리
+ */
+export const migrateV1ToV2 = (v1: PopLayoutDataV1): PopLayoutDataV2 => {
+  const v2 = createEmptyPopLayoutV2();
+  
+  // 캔버스 그리드 설정 복사
+  v2.settings.canvasGrid = { ...v1.canvasGrid };
+  
+  // 메타데이터 복사
+  if (v1.metadata) {
+    v2.metadata = { ...v1.metadata };
+  }
+  
+  // 섹션별 마이그레이션
+  for (const section of v1.sections) {
+    // 1. 섹션 정의 생성
+    const sectionDef: PopSectionDefinition = {
+      id: section.id,
+      label: section.label,
+      componentIds: section.components.map(c => c.id),
+      innerGrid: { ...section.innerGrid },
+      style: section.style ? { ...section.style } : undefined,
+    };
+    v2.sections[section.id] = sectionDef;
+    
+    // 2. 섹션 위치 복사 (4모드 모두 동일하게)
+    const sectionPos: GridPosition = { ...section.grid };
+    v2.layouts.tablet_landscape.sectionPositions[section.id] = { ...sectionPos };
+    v2.layouts.tablet_portrait.sectionPositions[section.id] = { ...sectionPos };
+    v2.layouts.mobile_landscape.sectionPositions[section.id] = { ...sectionPos };
+    v2.layouts.mobile_portrait.sectionPositions[section.id] = { ...sectionPos };
+    
+    // 3. 컴포넌트별 마이그레이션
+    for (const comp of section.components) {
+      // 컴포넌트 정의 생성
+      const compDef: PopComponentDefinition = {
+        id: comp.id,
+        type: comp.type,
+        label: comp.label,
+        dataBinding: comp.dataBinding ? { ...comp.dataBinding } : undefined,
+        style: comp.style ? { ...comp.style } : undefined,
+        config: comp.config,
+      };
+      v2.components[comp.id] = compDef;
+      
+      // 컴포넌트 위치 복사 (4모드 모두 동일하게)
+      const compPos: GridPosition = { ...comp.grid };
+      v2.layouts.tablet_landscape.componentPositions[comp.id] = { ...compPos };
+      v2.layouts.tablet_portrait.componentPositions[comp.id] = { ...compPos };
+      v2.layouts.mobile_landscape.componentPositions[comp.id] = { ...compPos };
+      v2.layouts.mobile_portrait.componentPositions[comp.id] = { ...compPos };
+    }
+  }
+  
+  return v2;
+};
+
+/**
+ * 레이아웃 데이터를 v2로 보장 (필요시 마이그레이션)
+ */
+export const ensureV2Layout = (data: PopLayoutData): PopLayoutDataV2 => {
+  if (isV2Layout(data)) {
+    return data;
+  }
+  if (isV1Layout(data)) {
+    return migrateV1ToV2(data);
+  }
+  // 알 수 없는 버전 - 빈 v2 반환
+  console.warn("알 수 없는 레이아웃 버전, 빈 v2 레이아웃 생성");
+  return createEmptyPopLayoutV2();
+};
+
+// ========================================
+// v2 헬퍼 함수
+// ========================================
+
+/**
+ * v2 레이아웃에 섹션 추가 (4모드 동기화)
+ */
+export const addSectionToV2Layout = (
+  layout: PopLayoutDataV2,
+  sectionId: string,
+  position: GridPosition,
+  label?: string
+): PopLayoutDataV2 => {
+  const newLayout = { ...layout };
+  
+  // 섹션 정의 추가
+  newLayout.sections = {
+    ...newLayout.sections,
+    [sectionId]: createSectionDefinition(sectionId, label),
+  };
+  
+  // 4모드 모두에 위치 추가
+  const modeKeys: PopLayoutModeKey[] = [
+    "tablet_landscape", "tablet_portrait", 
+    "mobile_landscape", "mobile_portrait"
+  ];
+  
+  const newLayouts = { ...newLayout.layouts };
+  for (const mode of modeKeys) {
+    newLayouts[mode] = {
+      ...newLayouts[mode],
+      sectionPositions: {
+        ...newLayouts[mode].sectionPositions,
+        [sectionId]: { ...position },
+      },
+    };
+  }
+  newLayout.layouts = newLayouts;
+  
+  return newLayout;
+};
+
+/**
+ * v2 레이아웃에 컴포넌트 추가 (4모드 동기화)
+ */
+export const addComponentToV2Layout = (
+  layout: PopLayoutDataV2,
+  sectionId: string,
+  componentId: string,
+  type: PopComponentType,
+  position: GridPosition,
+  label?: string
+): PopLayoutDataV2 => {
+  const newLayout = { ...layout };
+  
+  // 컴포넌트 정의 추가
+  newLayout.components = {
+    ...newLayout.components,
+    [componentId]: createComponentDefinition(componentId, type, label),
+  };
+  
+  // 섹션의 componentIds에 추가
+  const section = newLayout.sections[sectionId];
+  if (section) {
+    newLayout.sections = {
+      ...newLayout.sections,
+      [sectionId]: {
+        ...section,
+        componentIds: [...section.componentIds, componentId],
+      },
+    };
+  }
+  
+  // 4모드 모두에 위치 추가
+  const modeKeys: PopLayoutModeKey[] = [
+    "tablet_landscape", "tablet_portrait", 
+    "mobile_landscape", "mobile_portrait"
+  ];
+  
+  const newLayouts = { ...newLayout.layouts };
+  for (const mode of modeKeys) {
+    newLayouts[mode] = {
+      ...newLayouts[mode],
+      componentPositions: {
+        ...newLayouts[mode].componentPositions,
+        [componentId]: { ...position },
+      },
+    };
+  }
+  newLayout.layouts = newLayouts;
+  
+  return newLayout;
+};
+
+/**
+ * v2 레이아웃에서 섹션 삭제 (4모드 동기화)
+ */
+export const removeSectionFromV2Layout = (
+  layout: PopLayoutDataV2,
+  sectionId: string
+): PopLayoutDataV2 => {
+  const newLayout = { ...layout };
+  
+  // 섹션에 포함된 컴포넌트 ID 가져오기
+  const section = newLayout.sections[sectionId];
+  const componentIds = section?.componentIds || [];
+  
+  // 섹션 정의 삭제
+  const { [sectionId]: _, ...remainingSections } = newLayout.sections;
+  newLayout.sections = remainingSections;
+  
+  // 컴포넌트 정의 삭제
+  let remainingComponents = { ...newLayout.components };
+  for (const compId of componentIds) {
+    const { [compId]: __, ...rest } = remainingComponents;
+    remainingComponents = rest;
+  }
+  newLayout.components = remainingComponents;
+  
+  // 4모드 모두에서 위치 삭제
+  const modeKeys: PopLayoutModeKey[] = [
+    "tablet_landscape", "tablet_portrait", 
+    "mobile_landscape", "mobile_portrait"
+  ];
+  
+  const newLayouts = { ...newLayout.layouts };
+  for (const mode of modeKeys) {
+    const { [sectionId]: ___, ...remainingSecPos } = newLayouts[mode].sectionPositions;
+    let remainingCompPos = { ...newLayouts[mode].componentPositions };
+    for (const compId of componentIds) {
+      const { [compId]: ____, ...rest } = remainingCompPos;
+      remainingCompPos = rest;
+    }
+    newLayouts[mode] = {
+      sectionPositions: remainingSecPos,
+      componentPositions: remainingCompPos,
+    };
+  }
+  newLayout.layouts = newLayouts;
+  
+  return newLayout;
+};
+
+/**
+ * v2 레이아웃에서 컴포넌트 삭제 (4모드 동기화)
+ */
+export const removeComponentFromV2Layout = (
+  layout: PopLayoutDataV2,
+  sectionId: string,
+  componentId: string
+): PopLayoutDataV2 => {
+  const newLayout = { ...layout };
+  
+  // 컴포넌트 정의 삭제
+  const { [componentId]: _, ...remainingComponents } = newLayout.components;
+  newLayout.components = remainingComponents;
+  
+  // 섹션의 componentIds에서 제거
+  const section = newLayout.sections[sectionId];
+  if (section) {
+    newLayout.sections = {
+      ...newLayout.sections,
+      [sectionId]: {
+        ...section,
+        componentIds: section.componentIds.filter(id => id !== componentId),
+      },
+    };
+  }
+  
+  // 4모드 모두에서 위치 삭제
+  const modeKeys: PopLayoutModeKey[] = [
+    "tablet_landscape", "tablet_portrait", 
+    "mobile_landscape", "mobile_portrait"
+  ];
+  
+  const newLayouts = { ...newLayout.layouts };
+  for (const mode of modeKeys) {
+    const { [componentId]: __, ...remainingCompPos } = newLayouts[mode].componentPositions;
+    newLayouts[mode] = {
+      ...newLayouts[mode],
+      componentPositions: remainingCompPos,
+    };
+  }
+  newLayout.layouts = newLayouts;
+  
+  return newLayout;
+};
+
+/**
+ * v2 레이아웃에서 특정 모드의 섹션 위치 업데이트
+ */
+export const updateSectionPositionInMode = (
+  layout: PopLayoutDataV2,
+  modeKey: PopLayoutModeKey,
+  sectionId: string,
+  position: GridPosition
+): PopLayoutDataV2 => {
+  return {
+    ...layout,
+    layouts: {
+      ...layout.layouts,
+      [modeKey]: {
+        ...layout.layouts[modeKey],
+        sectionPositions: {
+          ...layout.layouts[modeKey].sectionPositions,
+          [sectionId]: position,
+        },
+      },
+    },
+  };
+};
+
+/**
+ * v2 레이아웃에서 특정 모드의 컴포넌트 위치 업데이트
+ */
+export const updateComponentPositionInMode = (
+  layout: PopLayoutDataV2,
+  modeKey: PopLayoutModeKey,
+  componentId: string,
+  position: GridPosition
+): PopLayoutDataV2 => {
+  return {
+    ...layout,
+    layouts: {
+      ...layout.layouts,
+      [modeKey]: {
+        ...layout.layouts[modeKey],
+        componentPositions: {
+          ...layout.layouts[modeKey].componentPositions,
+          [componentId]: position,
+        },
+      },
+    },
+  };
+};
+
+// ========================================
+// 타입 가드
+// ========================================
+
+export const isPopField = (comp: PopComponentDataV1 | PopComponentDefinition): boolean =>
   comp.type === "pop-field";
 
-export const isPopButton = (comp: PopComponentData): boolean =>
+export const isPopButton = (comp: PopComponentDataV1 | PopComponentDefinition): boolean =>
   comp.type === "pop-button";

frontend/components/pop/management/PopCategoryTree.tsx

@@ -302,6 +302,7 @@ function TreeNode({
                 <span className="text-muted-foreground/50 text-xs mr-1">ㄴ</span>
                 <Monitor className="h-4 w-4 text-blue-500 shrink-0" />
                 <span className="flex-1 text-sm truncate">{screen.screenName}</span>
+                <span className="text-[10px] text-muted-foreground shrink-0">#{screen.screenId}</span>
                 
                 {/* 더보기 메뉴 (폴더와 동일한 스타일) */}
                 <DropdownMenu>
@@ -880,6 +881,7 @@ export function PopCategoryTree({
                     >
                       <Monitor className="h-4 w-4 text-gray-400 shrink-0" />
                       <span className="flex-1 text-sm truncate">{screen.screenName}</span>
+                      <span className="text-[10px] text-muted-foreground shrink-0">#{screen.screenId}</span>
                       
                       {/* 더보기 메뉴 */}
                       <DropdownMenu>

frontend/components/pop/management/PopScreenPreview.tsx

@@ -20,9 +20,10 @@ interface PopScreenPreviewProps {
 }
 
 // 디바이스 프레임 크기
+// 모바일: 세로(portrait), 태블릿: 가로(landscape) 디폴트
 const DEVICE_SIZES = {
-  mobile: { width: 375, height: 667 }, // iPhone SE 기준
+  mobile: { width: 375, height: 667 }, // iPhone SE 기준 (세로)
-  tablet: { width: 768, height: 1024 }, // iPad 기준
+  tablet: { width: 1024, height: 768 }, // iPad 기준 (가로)
 };
 
 // ============================================================
@@ -46,7 +47,19 @@ export function PopScreenPreview({ screen, className }: PopScreenPreviewProps) {
       try {
         setLoading(true);
         const layout = await screenApi.getLayoutPop(screen.screenId);
-        setHasLayout(layout && layout.sections && layout.sections.length > 0);
+        
+        // v2 레이아웃: sections는 객체 (Record<string, PopSectionDefinition>)
+        // v1 레이아웃: sections는 배열
+        if (layout) {
+          const isV2 = layout.version === "pop-2.0";
+          const hasSections = isV2 
+            ? layout.sections && Object.keys(layout.sections).length > 0
+            : layout.sections && Array.isArray(layout.sections) && layout.sections.length > 0;
+          
+          setHasLayout(hasSections);
+        } else {
+          setHasLayout(false);
+        }
       } catch {
         setHasLayout(false);
       } finally {
@@ -94,11 +107,13 @@ export function PopScreenPreview({ screen, className }: PopScreenPreviewProps) {
           {/* 디바이스 선택 */}
           <Tabs value={deviceType} onValueChange={(v) => setDeviceType(v as DeviceType)}>
             <TabsList className="h-8">
-              <TabsTrigger value="mobile" className="h-7 px-2">
+              <TabsTrigger value="mobile" className="h-7 px-3 gap-1.5" title="모바일 (375x667)">
                 <Smartphone className="h-3.5 w-3.5" />
+                <span className="text-xs">모바일</span>
               </TabsTrigger>
-              <TabsTrigger value="tablet" className="h-7 px-2">
+              <TabsTrigger value="tablet" className="h-7 px-3 gap-1.5" title="태블릿 (1024x768 가로)">
                 <Tablet className="h-3.5 w-3.5" />
+                <span className="text-xs">태블릿</span>
               </TabsTrigger>
             </TabsList>
           </Tabs>
@@ -152,45 +167,26 @@ export function PopScreenPreview({ screen, className }: PopScreenPreviewProps) {
             </p>
           </div>
         ) : (
-          // 디바이스 프레임 + iframe
+          // 디바이스 프레임 + iframe (심플한 테두리)
           <div
-            className="relative bg-gray-900 rounded-[2rem] p-2 shadow-xl"
+            className="relative border-2 border-gray-300 rounded-lg shadow-lg overflow-hidden"
             style={{
-              width: deviceSize.width * scale + 16,
+              width: deviceSize.width * scale,
-              height: deviceSize.height * scale + 16,
+              height: deviceSize.height * scale,
             }}
           >
-            {/* 디바이스 노치 (모바일) */}
+            <iframe
-            {deviceType === "mobile" && (
+              key={key}
-              <div className="absolute top-0 left-1/2 -translate-x-1/2 w-24 h-6 bg-gray-900 rounded-b-xl z-10" />
+              src={previewUrl || ""}
-            )}
+              className="w-full h-full border-0"
-
-            {/* 디바이스 홈 버튼 (태블릿) */}
-            {deviceType === "tablet" && (
-              <div className="absolute bottom-2 left-1/2 -translate-x-1/2 w-8 h-8 bg-gray-800 rounded-full" />
-            )}
-
-            {/* iframe 컨테이너 */}
-            <div
-              className="bg-white rounded-[1.5rem] overflow-hidden"
               style={{
-                width: deviceSize.width * scale,
+                width: deviceSize.width,
-                height: deviceSize.height * scale,
+                height: deviceSize.height,
+                transform: `scale(${scale})`,
+                transformOrigin: "top left",
               }}
-            >
+              title="POP Screen Preview"
-              <iframe
+            />
-                key={key}
-                src={previewUrl || ""}
-                className="w-full h-full border-0"
-                style={{
-                  width: deviceSize.width,
-                  height: deviceSize.height,
-                  transform: `scale(${scale})`,
-                  transformOrigin: "top left",
-                }}
-                title="POP Screen Preview"
-              />
-            </div>
           </div>
         )}
       </div>