.cursor/rules/api-client-usage.mdc

@@ -0,0 +1,209 @@
+---
+alwaysApply: true
+description: API 요청 시 항상 전용 API 클라이언트를 사용하도록 강제하는 규칙
+---
+
+# API 클라이언트 사용 규칙
+
+## 핵심 원칙
+
+**절대 `fetch`를 직접 사용하지 않고, 반드시 전용 API 클라이언트를 사용해야 합니다.**
+
+## 이유
+
+1. **환경별 URL 자동 처리**: 프로덕션(`v1.vexplor.com`)과 개발(`localhost`) 환경에서 올바른 백엔드 서버로 요청
+2. **일관된 에러 처리**: 모든 API 호출에서 동일한 에러 핸들링
+3. **인증 토큰 자동 포함**: Authorization 헤더 자동 추가
+4. **유지보수성**: API 변경 시 한 곳에서만 수정
+
+## API 클라이언트 위치
+
+```
+frontend/lib/api/
+├── client.ts           # Axios 기반 공통 클라이언트
+├── flow.ts            # 플로우 관리 API
+├── dashboard.ts       # 대시보드 API
+├── mail.ts            # 메일 API
+├── externalCall.ts    # 외부 호출 API
+├── company.ts         # 회사 관리 API
+└── file.ts            # 파일 업로드/다운로드 API
+```
+
+## 올바른 사용법
+
+### ❌ 잘못된 방법 (절대 사용 금지)
+
+```typescript
+// 직접 fetch 사용 - 환경별 URL이 자동 처리되지 않음
+const response = await fetch("/api/flow/definitions/29/steps");
+const data = await response.json();
+
+// 상대 경로 - 프로덕션에서 잘못된 도메인으로 요청
+const response = await fetch(`/api/flow/${flowId}/steps`);
+```
+
+### ✅ 올바른 방법
+
+```typescript
+// 1. API 클라이언트 함수 import
+import { getFlowSteps } from "@/lib/api/flow";
+
+// 2. 함수 호출
+const stepsResponse = await getFlowSteps(flowId);
+if (stepsResponse.success && stepsResponse.data) {
+  setSteps(stepsResponse.data);
+}
+```
+
+## 주요 API 클라이언트 함수
+
+### 플로우 관리 ([flow.ts](mdc:frontend/lib/api/flow.ts))
+
+```typescript
+import {
+  getFlowDefinitions, // 플로우 목록
+  getFlowById, // 플로우 상세
+  createFlowDefinition, // 플로우 생성
+  updateFlowDefinition, // 플로우 수정
+  deleteFlowDefinition, // 플로우 삭제
+  getFlowSteps, // 스텝 목록 ⭐
+  createFlowStep, // 스텝 생성
+  updateFlowStep, // 스텝 수정
+  deleteFlowStep, // 스텝 삭제
+  getFlowConnections, // 연결 목록 ⭐
+  createFlowConnection, // 연결 생성
+  deleteFlowConnection, // 연결 삭제
+  getStepDataCount, // 스텝 데이터 카운트
+  getStepDataList, // 스텝 데이터 목록
+  getAllStepCounts, // 모든 스텝 카운트
+  moveData, // 데이터 이동
+  moveBatchData, // 배치 데이터 이동
+  getAuditLogs, // 오딧 로그
+} from "@/lib/api/flow";
+```
+
+### Axios 클라이언트 ([client.ts](mdc:frontend/lib/api/client.ts))
+
+```typescript
+import apiClient from "@/lib/api/client";
+
+// GET 요청
+const response = await apiClient.get("/api/endpoint");
+
+// POST 요청
+const response = await apiClient.post("/api/endpoint", { data });
+
+// PUT 요청
+const response = await apiClient.put("/api/endpoint", { data });
+
+// DELETE 요청
+const response = await apiClient.delete("/api/endpoint");
+```
+
+## 새로운 API 함수 추가 가이드
+
+기존 API 클라이언트에 함수가 없는 경우:
+
+```typescript
+// frontend/lib/api/yourModule.ts
+
+// 1. API URL 동적 설정 (필수)
+const getApiBaseUrl = (): string => {
+  if (process.env.NEXT_PUBLIC_API_URL) {
+    return process.env.NEXT_PUBLIC_API_URL;
+  }
+
+  if (typeof window !== "undefined") {
+    const currentHost = window.location.hostname;
+
+    // 프로덕션: v1.vexplor.com → api.vexplor.com
+    if (currentHost === "v1.vexplor.com") {
+      return "https://api.vexplor.com/api";
+    }
+
+    // 로컬 개발
+    if (currentHost === "localhost" || currentHost === "127.0.0.1") {
+      return "http://localhost:8080/api";
+    }
+  }
+
+  return "/api";
+};
+
+const API_BASE = getApiBaseUrl();
+
+// 2. API 함수 작성
+export async function getYourData(id: number): Promise<ApiResponse<YourType>> {
+  try {
+    const response = await fetch(`${API_BASE}/your-endpoint/${id}`, {
+      credentials: "include",
+    });
+
+    return await response.json();
+  } catch (error: any) {
+    return {
+      success: false,
+      error: error.message,
+    };
+  }
+}
+```
+
+## 환경별 URL 매핑
+
+API 클라이언트는 자동으로 환경을 감지합니다:
+
+| 현재 호스트      | 백엔드 API URL                |
+| ---------------- | ----------------------------- |
+| `v1.vexplor.com` | `https://api.vexplor.com/api` |
+| `localhost:9771` | `http://localhost:8080/api`   |
+| `localhost:3000` | `http://localhost:8080/api`   |
+
+## 체크리스트
+
+코드 작성 시 다음을 확인하세요:
+
+- [ ] `fetch('/api/...')` 직접 사용하지 않음
+- [ ] 적절한 API 클라이언트 함수를 import 함
+- [ ] API 응답의 `success` 필드를 체크함
+- [ ] 에러 처리를 구현함
+- [ ] 새로운 API가 필요하면 `lib/api/` 에 함수 추가
+
+## 예외 상황
+
+다음 경우에만 `fetch`를 직접 사용할 수 있습니다:
+
+1. **외부 서비스 호출**: 다른 도메인의 API 호출 시
+2. **특수한 헤더가 필요한 경우**: FormData, Blob 등
+
+이 경우에도 가능하면 전용 API 클라이언트 함수로 래핑하세요.
+
+## 실제 적용 예시
+
+### 플로우 위젯 ([FlowWidget.tsx](mdc:frontend/components/screen/widgets/FlowWidget.tsx))
+
+```typescript
+// ❌ 이전 코드
+const stepsResponse = await fetch(`/api/flow/definitions/${flowId}/steps`);
+const connectionsResponse = await fetch(`/api/flow/connections/${flowId}`);
+
+// ✅ 수정된 코드
+const stepsResponse = await getFlowSteps(flowId);
+const connectionsResponse = await getFlowConnections(flowId);
+```
+
+### 플로우 가시성 패널 ([FlowVisibilityConfigPanel.tsx](mdc:frontend/components/screen/config-panels/FlowVisibilityConfigPanel.tsx))
+
+```typescript
+// ❌ 이전 코드
+const stepsResponse = await fetch(`/api/flow/definitions/${flowId}/steps`);
+
+// ✅ 수정된 코드
+const stepsResponse = await getFlowSteps(flowId);
+```
+
+## 참고 자료
+
+- [API 클라이언트 공통 설정](mdc:frontend/lib/api/client.ts)
+- [플로우 API 클라이언트](mdc:frontend/lib/api/flow.ts)
+- [API URL 유틸리티](mdc:frontend/lib/utils/apiUrl.ts)

.cursor/rules/table-with-sticky-header.mdc

@@ -0,0 +1,343 @@
+# 고정 헤더 테이블 표준 가이드
+
+## 개요
+
+스크롤 가능한 테이블에서 헤더를 상단에 고정하는 표준 구조입니다.
+플로우 위젯의 스텝 데이터 리스트 테이블을 참조 기준으로 합니다.
+
+## 필수 구조
+
+### 1. 기본 HTML 구조
+
+```tsx
+<div className="relative overflow-auto" style={{ height: "450px" }}>
+  <Table noWrapper>
+    <TableHeader>
+      <TableRow>
+        <TableHead className="bg-background sticky top-0 z-10 border-b shadow-[0_1px_0_0_rgb(0,0,0,0.1)]">
+          헤더 1
+        </TableHead>
+        <TableHead className="bg-background sticky top-0 z-10 border-b shadow-[0_1px_0_0_rgb(0,0,0,0.1)]">
+          헤더 2
+        </TableHead>
+      </TableRow>
+    </TableHeader>
+    <TableBody>{/* 데이터 행들 */}</TableBody>
+  </Table>
+</div>
+```
+
+### 2. 필수 클래스 설명
+
+#### 스크롤 컨테이너 (외부 div)
+
+```tsx
+className="relative overflow-auto"
+style={{ height: "450px" }}
+```
+
+**필수 요소:**
+
+- `relative`: sticky positioning의 기준점
+- `overflow-auto`: 스크롤 활성화
+- `height`: 고정 높이 (인라인 스타일 또는 Tailwind 클래스)
+
+#### Table 컴포넌트
+
+```tsx
+<Table noWrapper>
+```
+
+**필수 props:**
+
+- `noWrapper`: Table 컴포넌트의 내부 wrapper 제거 (매우 중요!)
+  - 이것이 없으면 sticky header가 작동하지 않음
+
+#### TableHead (헤더 셀)
+
+```tsx
+className =
+  "bg-background sticky top-0 z-10 border-b shadow-[0_1px_0_0_rgb(0,0,0,0.1)]";
+```
+
+**필수 클래스:**
+
+- `bg-background`: 배경색 (스크롤 시 데이터가 보이지 않도록)
+- `sticky top-0`: 상단 고정
+- `z-10`: 다른 요소 위에 표시
+- `border-b`: 하단 테두리
+- `shadow-[0_1px_0_0_rgb(0,0,0,0.1)]`: 얇은 그림자 (헤더와 본문 구분)
+
+### 3. 왼쪽 열 고정 (체크박스 등)
+
+첫 번째 열도 고정하려면:
+
+```tsx
+<TableHead className="bg-background sticky top-0 left-0 z-20 border-b shadow-[0_1px_0_0_rgb(0,0,0,0.1)]">
+  <Checkbox />
+</TableHead>
+```
+
+**z-index 규칙:**
+
+- 왼쪽+상단 고정: `z-20`
+- 상단만 고정: `z-10`
+- 왼쪽만 고정: `z-10`
+- 일반 셀: z-index 없음
+
+### 4. 완전한 예제 (체크박스 포함)
+
+```tsx
+<div className="relative overflow-auto" style={{ height: "450px" }}>
+  <Table noWrapper>
+    <TableHeader>
+      <TableRow>
+        {/* 왼쪽 고정 체크박스 열 */}
+        <TableHead className="bg-background sticky top-0 left-0 z-20 w-12 border-b px-3 py-2 text-center shadow-[0_1px_0_0_rgb(0,0,0,0.1)]">
+          <Checkbox checked={allSelected} onCheckedChange={handleSelectAll} />
+        </TableHead>
+
+        {/* 일반 헤더 열들 */}
+        {columns.map((col) => (
+          <TableHead
+            key={col}
+            className="bg-background sticky top-0 z-10 border-b px-3 py-2 text-xs font-semibold whitespace-nowrap shadow-[0_1px_0_0_rgb(0,0,0,0.1)] sm:text-sm"
+          >
+            {col}
+          </TableHead>
+        ))}
+      </TableRow>
+    </TableHeader>
+
+    <TableBody>
+      {data.map((row, index) => (
+        <TableRow key={index}>
+          {/* 왼쪽 고정 체크박스 */}
+          <TableCell className="bg-background sticky left-0 z-10 border-b px-3 py-2 text-center">
+            <Checkbox
+              checked={selectedRows.has(index)}
+              onCheckedChange={() => toggleRow(index)}
+            />
+          </TableCell>
+
+          {/* 데이터 셀들 */}
+          {columns.map((col) => (
+            <TableCell key={col} className="border-b px-3 py-2">
+              {row[col]}
+            </TableCell>
+          ))}
+        </TableRow>
+      ))}
+    </TableBody>
+  </Table>
+</div>
+```
+
+## 반응형 대응
+
+### 모바일: 카드 뷰
+
+```tsx
+{
+  /* 모바일: 카드 뷰 */
+}
+<div className="overflow-y-auto sm:hidden" style={{ height: "450px" }}>
+  <div className="space-y-2 p-3">
+    {data.map((item, index) => (
+      <div key={index} className="bg-card rounded-md border p-3">
+        {/* 카드 내용 */}
+      </div>
+    ))}
+  </div>
+</div>;
+
+{
+  /* 데스크톱: 테이블 뷰 */
+}
+<div
+  className="relative hidden overflow-auto sm:block"
+  style={{ height: "450px" }}
+>
+  <Table noWrapper>{/* 위의 테이블 구조 */}</Table>
+</div>;
+```
+
+## 자주하는 실수
+
+### ❌ 잘못된 예시
+
+```tsx
+{
+  /* 1. noWrapper 없음 - sticky 작동 안함 */
+}
+<Table>
+  <TableHeader>...</TableHeader>
+</Table>;
+
+{
+  /* 2. 배경색 없음 - 스크롤 시 데이터가 보임 */
+}
+<TableHead className="sticky top-0">헤더</TableHead>;
+
+{
+  /* 3. relative 없음 - sticky 기준점 없음 */
+}
+<div className="overflow-auto">
+  <Table noWrapper>...</Table>
+</div>;
+
+{
+  /* 4. 고정 높이 없음 - 스크롤 발생 안함 */
+}
+<div className="relative overflow-auto">
+  <Table noWrapper>...</Table>
+</div>;
+```
+
+### ✅ 올바른 예시
+
+```tsx
+{
+  /* 모든 필수 요소 포함 */
+}
+<div className="relative overflow-auto" style={{ height: "450px" }}>
+  <Table noWrapper>
+    <TableHeader>
+      <TableRow>
+        <TableHead className="bg-background sticky top-0 z-10 border-b shadow-[0_1px_0_0_rgb(0,0,0,0.1)]">
+          헤더
+        </TableHead>
+      </TableRow>
+    </TableHeader>
+    <TableBody>...</TableBody>
+  </Table>
+</div>;
+```
+
+## 높이 설정 가이드
+
+### 권장 높이값
+
+- **소형 리스트**: `300px` ~ `400px`
+- **중형 리스트**: `450px` ~ `600px` (플로우 위젯 기준)
+- **대형 리스트**: `calc(100vh - 200px)` (화면 높이 기준)
+
+### 동적 높이 계산
+
+```tsx
+// 화면 높이의 60%
+style={{ height: "60vh" }}
+
+// 화면 높이 - 헤더/푸터 제외
+style={{ height: "calc(100vh - 250px)" }}
+
+// 부모 요소 기준
+className="h-full overflow-auto"
+```
+
+## 성능 최적화
+
+### 1. 가상 스크롤 (대량 데이터)
+
+데이터가 1000건 이상인 경우 `react-virtual` 사용 권장:
+
+```tsx
+import { useVirtualizer } from "@tanstack/react-virtual";
+
+const parentRef = useRef<HTMLDivElement>(null);
+
+const rowVirtualizer = useVirtualizer({
+  count: data.length,
+  getScrollElement: () => parentRef.current,
+  estimateSize: () => 50, // 행 높이
+});
+```
+
+### 2. 페이지네이션
+
+대량 데이터는 페이지 단위로 렌더링:
+
+```tsx
+const paginatedData = data.slice((page - 1) * pageSize, page * pageSize);
+```
+
+## 접근성
+
+### ARIA 레이블
+
+```tsx
+<div
+  className="relative overflow-auto"
+  style={{ height: "450px" }}
+  role="region"
+  aria-label="스크롤 가능한 데이터 테이블"
+  tabIndex={0}
+>
+  <Table noWrapper aria-label="데이터 목록">
+    {/* 테이블 내용 */}
+  </Table>
+</div>
+```
+
+### 키보드 네비게이션
+
+```tsx
+<TableRow
+  tabIndex={0}
+  onKeyDown={(e) => {
+    if (e.key === "Enter" || e.key === " ") {
+      handleRowClick();
+    }
+  }}
+>
+  {/* 행 내용 */}
+</TableRow>
+```
+
+## 다크 모드 대응
+
+### 배경색
+
+```tsx
+{
+  /* 라이트/다크 모드 모두 대응 */
+}
+className = "bg-background"; // ✅ 권장
+
+{
+  /* 고정 색상 - 다크 모드 문제 */
+}
+className = "bg-white"; // ❌ 비권장
+```
+
+### 그림자
+
+```tsx
+{
+  /* 다크 모드에서도 보이는 그림자 */
+}
+className = "shadow-[0_1px_0_0_hsl(var(--border))]";
+
+{
+  /* 또는 */
+}
+className = "shadow-[0_1px_0_0_rgb(0,0,0,0.1)]";
+```
+
+## 참조 파일
+
+- **구현 예시**: `frontend/components/screen/widgets/FlowWidget.tsx` (line 760-820)
+- **Table 컴포넌트**: `frontend/components/ui/table.tsx`
+
+## 체크리스트
+
+테이블 구현 시 다음을 확인하세요:
+
+- [ ] 외부 div에 `relative overflow-auto` 적용
+- [ ] 외부 div에 고정 높이 설정
+- [ ] `<Table noWrapper>` 사용
+- [ ] TableHead에 `bg-background sticky top-0 z-10` 적용
+- [ ] TableHead에 `border-b shadow-[...]` 적용
+- [ ] 왼쪽 고정 열은 `z-20` 사용
+- [ ] 모바일 반응형 대응 (카드 뷰)
+- [ ] 다크 모드 호환 색상 사용

frontend/components/dataflow/node-editor/FlowEditor.tsx

@@ -147,6 +147,14 @@ function FlowEditorInner({ initialFlowId }: FlowEditorInnerProps) {
               flowData.nodes || [],
               flowData.edges || [],
             );
+
+            // 🆕 플로우 로드 후 첫 번째 노드 자동 선택
+            if (flowData.nodes && flowData.nodes.length > 0) {
+              const firstNode = flowData.nodes[0];
+              selectNodes([firstNode.id]);
+              setShowPropertiesPanelLocal(true);
+              console.log("✅ 첫 번째 노드 자동 선택:", firstNode.id);
+            }
           }
         } catch (error) {
           console.error("플로우 로드 실패:", error);
@@ -155,7 +163,7 @@ function FlowEditorInner({ initialFlowId }: FlowEditorInnerProps) {
     };
 
     fetchAndLoadFlow();
-  }, [initialFlowId]);
+  }, [initialFlowId, loadFlow, selectNodes]);
 
   /**
    * 노드 선택 변경 핸들러

frontend/components/dataflow/node-editor/panels/properties/DeleteActionProperties.tsx

@@ -67,6 +67,19 @@ export function DeleteActionProperties({ nodeId, data }: DeleteActionPropertiesP
   const [tablesOpen, setTablesOpen] = useState(false);
   const [selectedTableLabel, setSelectedTableLabel] = useState(data.targetTable);
 
+  // 내부 DB 컬럼 관련 상태
+  interface ColumnInfo {
+    columnName: string;
+    columnLabel?: string;
+    dataType: string;
+    isNullable: boolean;
+  }
+  const [targetColumns, setTargetColumns] = useState<ColumnInfo[]>([]);
+  const [columnsLoading, setColumnsLoading] = useState(false);
+
+  // Combobox 열림 상태 관리
+  const [fieldOpenState, setFieldOpenState] = useState<boolean[]>([]);
+
   useEffect(() => {
     setDisplayName(data.displayName || `${data.targetTable} 삭제`);
     setTargetTable(data.targetTable);
@@ -101,6 +114,18 @@ export function DeleteActionProperties({ nodeId, data }: DeleteActionPropertiesP
     }
   }, [targetType, selectedExternalConnectionId, externalTargetTable]);
 
+  // 🔥 내부 DB 컬럼 로딩
+  useEffect(() => {
+    if (targetType === "internal" && targetTable) {
+      loadColumns(targetTable);
+    }
+  }, [targetType, targetTable]);
+
+  // whereConditions 변경 시 fieldOpenState 초기화
+  useEffect(() => {
+    setFieldOpenState(new Array(whereConditions.length).fill(false));
+  }, [whereConditions.length]);
+
   const loadExternalConnections = async () => {
     try {
       setExternalConnectionsLoading(true);
@@ -171,6 +196,28 @@ export function DeleteActionProperties({ nodeId, data }: DeleteActionPropertiesP
     }
   };
 
+  // 🔥 내부 DB 컬럼 로딩
+  const loadColumns = async (tableName: string) => {
+    try {
+      setColumnsLoading(true);
+      const response = await tableTypeApi.getColumns(tableName);
+      if (response && Array.isArray(response)) {
+        const columnInfos: ColumnInfo[] = response.map((col: any) => ({
+          columnName: col.columnName || col.column_name,
+          columnLabel: col.columnLabel || col.column_label,
+          dataType: col.dataType || col.data_type || "text",
+          isNullable: col.isNullable !== undefined ? col.isNullable : true,
+        }));
+        setTargetColumns(columnInfos);
+      }
+    } catch (error) {
+      console.error("컬럼 로딩 실패:", error);
+      setTargetColumns([]);
+    } finally {
+      setColumnsLoading(false);
+    }
+  };
+
   const handleTableSelect = (tableName: string) => {
     const selectedTable = tables.find((t: any) => t.tableName === tableName);
     const label = (selectedTable as any)?.tableLabel || selectedTable?.displayName || tableName;
@@ -186,18 +233,22 @@ export function DeleteActionProperties({ nodeId, data }: DeleteActionPropertiesP
   };
 
   const handleAddCondition = () => {
-    setWhereConditions([
+    const newConditions = [
       ...whereConditions,
       {
         field: "",
         operator: "EQUALS",
         value: "",
       },
-    ]);
+    ];
+    setWhereConditions(newConditions);
+    setFieldOpenState(new Array(newConditions.length).fill(false));
   };
 
   const handleRemoveCondition = (index: number) => {
-    setWhereConditions(whereConditions.filter((_, i) => i !== index));
+    const newConditions = whereConditions.filter((_, i) => i !== index);
+    setWhereConditions(newConditions);
+    setFieldOpenState(new Array(newConditions.length).fill(false));
   };
 
   const handleConditionChange = (index: number, field: string, value: any) => {
@@ -639,64 +690,169 @@ export function DeleteActionProperties({ nodeId, data }: DeleteActionPropertiesP
             </Button>
           </div>
 
+          {/* 컬럼 로딩 상태 */}
+          {targetType === "internal" && targetTable && columnsLoading && (
+            <div className="rounded border border-gray-200 bg-gray-50 p-3 text-center text-xs text-gray-500">
+              컬럼 정보를 불러오는 중...
+            </div>
+          )}
+
+          {/* 테이블 미선택 안내 */}
+          {targetType === "internal" && !targetTable && (
+            <div className="rounded border border-dashed border-gray-300 bg-gray-50 p-3 text-center text-xs text-gray-500">
+              먼저 타겟 테이블을 선택하세요
+            </div>
+          )}
+
           {whereConditions.length > 0 ? (
             <div className="space-y-2">
-              {whereConditions.map((condition, index) => (
-                <div key={index} className="rounded border-2 border-red-200 bg-red-50 p-2">
-                  <div className="mb-2 flex items-center justify-between">
-                    <span className="text-xs font-medium text-red-700">조건 #{index + 1}</span>
-                    <Button
-                      size="sm"
-                      variant="ghost"
-                      onClick={() => handleRemoveCondition(index)}
-                      className="h-6 w-6 p-0"
-                    >
-                      <Trash2 className="h-3 w-3" />
-                    </Button>
-                  </div>
+              {whereConditions.map((condition, index) => {
+                // 현재 타입에 따라 사용 가능한 컬럼 리스트 결정
+                const availableColumns =
+                  targetType === "internal"
+                    ? targetColumns
+                    : targetType === "external"
+                      ? externalColumns.map((col) => ({
+                          columnName: col.column_name,
+                          columnLabel: col.column_name,
+                          dataType: col.data_type,
+                          isNullable: true,
+                        }))
+                      : [];
 
-                  <div className="space-y-2">
-                    <div>
-                      <Label className="text-xs text-gray-600">필드</Label>
-                      <Input
-                        value={condition.field}
-                        onChange={(e) => handleConditionChange(index, "field", e.target.value)}
-                        placeholder="조건 필드명"
-                        className="mt-1 h-8 text-xs"
-                      />
-                    </div>
-
-                    <div>
-                      <Label className="text-xs text-gray-600">연산자</Label>
-                      <Select
-                        value={condition.operator}
-                        onValueChange={(value) => handleConditionChange(index, "operator", value)}
+                return (
+                  <div key={index} className="rounded border-2 border-red-200 bg-red-50 p-2">
+                    <div className="mb-2 flex items-center justify-between">
+                      <span className="text-xs font-medium text-red-700">조건 #{index + 1}</span>
+                      <Button
+                        size="sm"
+                        variant="ghost"
+                        onClick={() => handleRemoveCondition(index)}
+                        className="h-6 w-6 p-0"
                       >
-                        <SelectTrigger className="mt-1 h-8 text-xs">
-                          <SelectValue />
-                        </SelectTrigger>
-                        <SelectContent>
-                          {OPERATORS.map((op) => (
-                            <SelectItem key={op.value} value={op.value}>
-                              {op.label}
-                            </SelectItem>
-                          ))}
-                        </SelectContent>
-                      </Select>
+                        <Trash2 className="h-3 w-3" />
+                      </Button>
                     </div>
 
-                    <div>
-                      <Label className="text-xs text-gray-600">값</Label>
-                      <Input
-                        value={condition.value as string}
-                        onChange={(e) => handleConditionChange(index, "value", e.target.value)}
-                        placeholder="비교 값"
-                        className="mt-1 h-8 text-xs"
-                      />
+                    <div className="space-y-2">
+                      {/* 필드 - Combobox */}
+                      <div>
+                        <Label className="text-xs text-gray-600">필드</Label>
+                        {availableColumns.length > 0 ? (
+                          <Popover
+                            open={fieldOpenState[index]}
+                            onOpenChange={(open) => {
+                              const newState = [...fieldOpenState];
+                              newState[index] = open;
+                              setFieldOpenState(newState);
+                            }}
+                          >
+                            <PopoverTrigger asChild>
+                              <Button
+                                variant="outline"
+                                role="combobox"
+                                aria-expanded={fieldOpenState[index]}
+                                className="mt-1 h-8 w-full justify-between text-xs sm:h-10 sm:text-sm"
+                              >
+                                {condition.field
+                                  ? (() => {
+                                      const col = availableColumns.find((c) => c.columnName === condition.field);
+                                      return (
+                                        <div className="flex items-center justify-between gap-2 overflow-hidden">
+                                          <span className="truncate font-mono">
+                                            {col?.columnLabel || condition.field}
+                                          </span>
+                                          <span className="text-muted-foreground text-xs">{col?.dataType}</span>
+                                        </div>
+                                      );
+                                    })()
+                                  : "필드 선택"}
+                                <ChevronsUpDown className="ml-2 h-4 w-4 shrink-0 opacity-50" />
+                              </Button>
+                            </PopoverTrigger>
+                            <PopoverContent
+                              className="p-0"
+                              style={{ width: "var(--radix-popover-trigger-width)" }}
+                              align="start"
+                            >
+                              <Command>
+                                <CommandInput placeholder="필드 검색..." className="text-xs sm:text-sm" />
+                                <CommandList>
+                                  <CommandEmpty className="text-xs sm:text-sm">필드를 찾을 수 없습니다.</CommandEmpty>
+                                  <CommandGroup>
+                                    {availableColumns.map((col) => (
+                                      <CommandItem
+                                        key={col.columnName}
+                                        value={col.columnName}
+                                        onSelect={(currentValue) => {
+                                          handleConditionChange(index, "field", currentValue);
+                                          const newState = [...fieldOpenState];
+                                          newState[index] = false;
+                                          setFieldOpenState(newState);
+                                        }}
+                                        className="text-xs sm:text-sm"
+                                      >
+                                        <Check
+                                          className={cn(
+                                            "mr-2 h-4 w-4",
+                                            condition.field === col.columnName ? "opacity-100" : "opacity-0",
+                                          )}
+                                        />
+                                        <div className="flex flex-col">
+                                          <span className="font-mono font-medium">
+                                            {col.columnLabel || col.columnName}
+                                          </span>
+                                          <span className="text-muted-foreground text-[10px]">{col.dataType}</span>
+                                        </div>
+                                      </CommandItem>
+                                    ))}
+                                  </CommandGroup>
+                                </CommandList>
+                              </Command>
+                            </PopoverContent>
+                          </Popover>
+                        ) : (
+                          <Input
+                            value={condition.field}
+                            onChange={(e) => handleConditionChange(index, "field", e.target.value)}
+                            placeholder="조건 필드명"
+                            className="mt-1 h-8 text-xs"
+                          />
+                        )}
+                      </div>
+
+                      <div>
+                        <Label className="text-xs text-gray-600">연산자</Label>
+                        <Select
+                          value={condition.operator}
+                          onValueChange={(value) => handleConditionChange(index, "operator", value)}
+                        >
+                          <SelectTrigger className="mt-1 h-8 text-xs">
+                            <SelectValue />
+                          </SelectTrigger>
+                          <SelectContent>
+                            {OPERATORS.map((op) => (
+                              <SelectItem key={op.value} value={op.value}>
+                                {op.label}
+                              </SelectItem>
+                            ))}
+                          </SelectContent>
+                        </Select>
+                      </div>
+
+                      <div>
+                        <Label className="text-xs text-gray-600">값</Label>
+                        <Input
+                          value={condition.value as string}
+                          onChange={(e) => handleConditionChange(index, "value", e.target.value)}
+                          placeholder="비교 값"
+                          className="mt-1 h-8 text-xs"
+                        />
+                      </div>
                     </div>
                   </div>
-                </div>
-              ))}
+                );
+              })}
             </div>
           ) : (
             <div className="rounded border-2 border-dashed border-red-300 bg-red-50 p-4 text-center text-xs text-red-600">
@@ -705,7 +861,6 @@ export function DeleteActionProperties({ nodeId, data }: DeleteActionPropertiesP
           )}
         </div>
 
-
         <div className="space-y-2">
           <div className="rounded bg-red-50 p-3 text-xs text-red-700">
             🚨 WHERE 조건 없이 삭제하면 테이블의 모든 데이터가 영구 삭제됩니다!

frontend/components/dataflow/node-editor/panels/properties/InsertActionProperties.tsx

@@ -13,6 +13,7 @@ import { Checkbox } from "@/components/ui/checkbox";
 import { Command, CommandEmpty, CommandGroup, CommandInput, CommandItem, CommandList } from "@/components/ui/command";
 import { Popover, PopoverContent, PopoverTrigger } from "@/components/ui/popover";
 import { Select, SelectContent, SelectItem, SelectTrigger, SelectValue } from "@/components/ui/select";
+import { ScrollArea } from "@/components/ui/scroll-area";
 import { cn } from "@/lib/utils";
 import { useFlowEditorStore } from "@/lib/stores/flowEditorStore";
 import { tableTypeApi } from "@/lib/api/screen";
@@ -37,6 +38,7 @@ interface ColumnInfo {
   columnLabel?: string;
   dataType: string;
   isNullable: boolean;
+  columnDefault?: string | null;
 }
 
 export function InsertActionProperties({ nodeId, data }: InsertActionPropertiesProps) {
@@ -63,6 +65,10 @@ export function InsertActionProperties({ nodeId, data }: InsertActionPropertiesP
   // REST API 소스 노드 연결 여부
   const [hasRestAPISource, setHasRestAPISource] = useState(false);
 
+  // Combobox 열림 상태 관리 (필드 매핑)
+  const [mappingSourceFieldsOpenState, setMappingSourceFieldsOpenState] = useState<boolean[]>([]);
+  const [mappingTargetFieldsOpenState, setMappingTargetFieldsOpenState] = useState<boolean[]>([]);
+
   // 🔥 외부 DB 관련 상태
   const [externalConnections, setExternalConnections] = useState<ExternalConnection[]>([]);
   const [externalConnectionsLoading, setExternalConnectionsLoading] = useState(false);
@@ -118,6 +124,12 @@ export function InsertActionProperties({ nodeId, data }: InsertActionPropertiesP
     }
   }, [targetType, selectedExternalConnectionId]);
 
+  // fieldMappings 변경 시 Combobox 열림 상태 초기화
+  useEffect(() => {
+    setMappingSourceFieldsOpenState(new Array(fieldMappings.length).fill(false));
+    setMappingTargetFieldsOpenState(new Array(fieldMappings.length).fill(false));
+  }, [fieldMappings.length]);
+
   // 🔥 외부 테이블 변경 시 컬럼 로드
   useEffect(() => {
     if (targetType === "external" && selectedExternalConnectionId && externalTargetTable) {
@@ -340,12 +352,27 @@ export function InsertActionProperties({ nodeId, data }: InsertActionPropertiesP
 
       const columns = await tableTypeApi.getColumns(tableName);
 
-      const columnInfo: ColumnInfo[] = columns.map((col: any) => ({
-        columnName: col.column_name || col.columnName,
-        columnLabel: col.label_ko || col.columnLabel,
-        dataType: col.data_type || col.dataType || "unknown",
-        isNullable: col.is_nullable === "YES" || col.isNullable === true,
-      }));
+      const columnInfo: ColumnInfo[] = columns.map((col: any) => {
+        // is_nullable 파싱: "YES", true, 1 등을 true로, "NO", false, 0 등을 false로 변환
+        const isNullableValue = col.is_nullable ?? col.isNullable;
+        let isNullable = true; // 기본값: nullable
+
+        if (typeof isNullableValue === "boolean") {
+          isNullable = isNullableValue;
+        } else if (typeof isNullableValue === "string") {
+          isNullable = isNullableValue.toUpperCase() === "YES" || isNullableValue.toUpperCase() === "TRUE";
+        } else if (typeof isNullableValue === "number") {
+          isNullable = isNullableValue !== 0;
+        }
+
+        return {
+          columnName: col.column_name || col.columnName,
+          columnLabel: col.label_ko || col.columnLabel,
+          dataType: col.data_type || col.dataType || "unknown",
+          isNullable,
+          columnDefault: col.column_default ?? col.columnDefault ?? null,
+        };
+      });
 
       setTargetColumns(columnInfo);
       console.log(`✅ 컬럼 ${columnInfo.length}개 로딩 완료`);
@@ -449,12 +476,20 @@ export function InsertActionProperties({ nodeId, data }: InsertActionPropertiesP
     ];
     setFieldMappings(newMappings);
     updateNode(nodeId, { fieldMappings: newMappings });
+
+    // Combobox 열림 상태 배열 초기화
+    setMappingSourceFieldsOpenState(new Array(newMappings.length).fill(false));
+    setMappingTargetFieldsOpenState(new Array(newMappings.length).fill(false));
   };
 
   const handleRemoveMapping = (index: number) => {
     const newMappings = fieldMappings.filter((_, i) => i !== index);
     setFieldMappings(newMappings);
     updateNode(nodeId, { fieldMappings: newMappings });
+
+    // Combobox 열림 상태 배열도 업데이트
+    setMappingSourceFieldsOpenState(new Array(newMappings.length).fill(false));
+    setMappingTargetFieldsOpenState(new Array(newMappings.length).fill(false));
   };
 
   const handleMappingChange = (index: number, field: string, value: any) => {
@@ -1077,35 +1112,87 @@ export function InsertActionProperties({ nodeId, data }: InsertActionPropertiesP
                                 className="mt-1 h-8 text-xs"
                               />
                             ) : (
-                              // 일반 소스인 경우: 드롭다운 선택
-                              <Select
-                                value={mapping.sourceField || ""}
-                                onValueChange={(value) => handleMappingChange(index, "sourceField", value || null)}
+                              // 일반 소스인 경우: Combobox 선택
+                              <Popover
+                                open={mappingSourceFieldsOpenState[index]}
+                                onOpenChange={(open) => {
+                                  const newState = [...mappingSourceFieldsOpenState];
+                                  newState[index] = open;
+                                  setMappingSourceFieldsOpenState(newState);
+                                }}
                               >
-                                <SelectTrigger className="mt-1 h-8 text-xs">
-                                  <SelectValue placeholder="소스 필드 선택" />
-                                </SelectTrigger>
-                                <SelectContent>
-                                  {sourceFields.length === 0 ? (
-                                    <div className="p-2 text-center text-xs text-gray-400">
-                                      연결된 소스 노드가 없습니다
-                                    </div>
-                                  ) : (
-                                    sourceFields.map((field) => (
-                                      <SelectItem key={field.name} value={field.name} className="text-xs">
-                                        <div className="flex items-center justify-between gap-2">
-                                          <span className="font-medium">{field.label || field.name}</span>
-                                          {field.label && field.label !== field.name && (
-                                            <span className="text-muted-foreground font-mono text-xs">
-                                              {field.name}
-                                            </span>
-                                          )}
-                                        </div>
-                                      </SelectItem>
-                                    ))
-                                  )}
-                                </SelectContent>
-                              </Select>
+                                <PopoverTrigger asChild>
+                                  <Button
+                                    variant="outline"
+                                    role="combobox"
+                                    aria-expanded={mappingSourceFieldsOpenState[index]}
+                                    className="mt-1 h-8 w-full justify-between text-xs sm:h-10 sm:text-sm"
+                                  >
+                                    {mapping.sourceField
+                                      ? (() => {
+                                          const field = sourceFields.find((f) => f.name === mapping.sourceField);
+                                          return (
+                                            <div className="flex items-center justify-between gap-2 overflow-hidden">
+                                              <span className="truncate font-medium">
+                                                {field?.label || mapping.sourceField}
+                                              </span>
+                                              {field?.label && field.label !== field.name && (
+                                                <span className="text-muted-foreground font-mono text-xs">
+                                                  {field.name}
+                                                </span>
+                                              )}
+                                            </div>
+                                          );
+                                        })()
+                                      : "소스 필드 선택"}
+                                    <ChevronsUpDown className="ml-2 h-4 w-4 shrink-0 opacity-50" />
+                                  </Button>
+                                </PopoverTrigger>
+                                <PopoverContent
+                                  className="p-0"
+                                  style={{ width: "var(--radix-popover-trigger-width)" }}
+                                  align="start"
+                                >
+                                  <Command>
+                                    <CommandInput placeholder="소스 필드 검색..." className="text-xs sm:text-sm" />
+                                    <CommandList>
+                                      <CommandEmpty className="text-xs sm:text-sm">
+                                        필드를 찾을 수 없습니다.
+                                      </CommandEmpty>
+                                      <CommandGroup>
+                                        {sourceFields.map((field) => (
+                                          <CommandItem
+                                            key={field.name}
+                                            value={field.name}
+                                            onSelect={(currentValue) => {
+                                              handleMappingChange(index, "sourceField", currentValue || null);
+                                              const newState = [...mappingSourceFieldsOpenState];
+                                              newState[index] = false;
+                                              setMappingSourceFieldsOpenState(newState);
+                                            }}
+                                            className="text-xs sm:text-sm"
+                                          >
+                                            <Check
+                                              className={cn(
+                                                "mr-2 h-4 w-4",
+                                                mapping.sourceField === field.name ? "opacity-100" : "opacity-0",
+                                              )}
+                                            />
+                                            <div className="flex flex-col">
+                                              <span className="font-medium">{field.label || field.name}</span>
+                                              {field.label && field.label !== field.name && (
+                                                <span className="text-muted-foreground font-mono text-[10px]">
+                                                  {field.name}
+                                                </span>
+                                              )}
+                                            </div>
+                                          </CommandItem>
+                                        ))}
+                                      </CommandGroup>
+                                    </CommandList>
+                                  </Command>
+                                </PopoverContent>
+                              </Popover>
                             )}
                             {hasRestAPISource && (
                               <p className="mt-1 text-xs text-gray-500">API 응답 JSON의 필드명을 입력하세요</p>
@@ -1116,43 +1203,134 @@ export function InsertActionProperties({ nodeId, data }: InsertActionPropertiesP
                             <ArrowRight className="h-4 w-4 text-green-600" />
                           </div>
 
-                          {/* 타겟 필드 드롭다운 (🔥 타입별 컬럼 사용) */}
+                          {/* 타겟 필드 Combobox (🔥 타입별 컬럼 사용) */}
                           <div>
                             <Label className="text-xs text-gray-600">타겟 필드</Label>
-                            <Select
-                              value={mapping.targetField}
-                              onValueChange={(value) => handleMappingChange(index, "targetField", value)}
+                            <Popover
+                              open={mappingTargetFieldsOpenState[index]}
+                              onOpenChange={(open) => {
+                                const newState = [...mappingTargetFieldsOpenState];
+                                newState[index] = open;
+                                setMappingTargetFieldsOpenState(newState);
+                              }}
                             >
-                              <SelectTrigger className="mt-1 h-8 text-xs">
-                                <SelectValue placeholder="타겟 필드 선택" />
-                              </SelectTrigger>
-                              <SelectContent>
-                                {/* 🔥 내부 DB 컬럼 */}
-                                {targetType === "internal" &&
-                                  targetColumns.map((col) => (
-                                    <SelectItem key={col.columnName} value={col.columnName} className="text-xs">
-                                      <div className="flex items-center justify-between gap-2">
-                                        <span className="font-mono">{col.columnLabel || col.columnName}</span>
-                                        <span className="text-muted-foreground">
-                                          {col.dataType}
-                                          {!col.isNullable && <span className="text-red-500">*</span>}
-                                        </span>
-                                      </div>
-                                    </SelectItem>
-                                  ))}
+                              <PopoverTrigger asChild>
+                                <Button
+                                  variant="outline"
+                                  role="combobox"
+                                  aria-expanded={mappingTargetFieldsOpenState[index]}
+                                  className="mt-1 h-8 w-full justify-between text-xs sm:h-10 sm:text-sm"
+                                >
+                                  {mapping.targetField
+                                    ? (() => {
+                                        if (targetType === "internal") {
+                                          const col = targetColumns.find((c) => c.columnName === mapping.targetField);
+                                          return (
+                                            <div className="flex items-center justify-between gap-2 overflow-hidden">
+                                              <span className="truncate font-mono">
+                                                {col?.columnLabel || mapping.targetField}
+                                              </span>
+                                              <span className="text-muted-foreground text-xs">
+                                                {col?.dataType}
+                                                {col && !col.isNullable && <span className="text-red-500">*</span>}
+                                              </span>
+                                            </div>
+                                          );
+                                        } else {
+                                          const col = externalColumns.find(
+                                            (c) => c.column_name === mapping.targetField,
+                                          );
+                                          return (
+                                            <div className="flex items-center justify-between gap-2 overflow-hidden">
+                                              <span className="truncate font-mono">
+                                                {col?.column_name || mapping.targetField}
+                                              </span>
+                                              <span className="text-muted-foreground text-xs">{col?.data_type}</span>
+                                            </div>
+                                          );
+                                        }
+                                      })()
+                                    : "타겟 필드 선택"}
+                                  <ChevronsUpDown className="ml-2 h-4 w-4 shrink-0 opacity-50" />
+                                </Button>
+                              </PopoverTrigger>
+                              <PopoverContent
+                                className="p-0"
+                                style={{ width: "var(--radix-popover-trigger-width)" }}
+                                align="start"
+                              >
+                                <Command>
+                                  <CommandInput placeholder="타겟 필드 검색..." className="text-xs sm:text-sm" />
+                                  <CommandList>
+                                    <CommandEmpty className="text-xs sm:text-sm">필드를 찾을 수 없습니다.</CommandEmpty>
+                                    <CommandGroup>
+                                      {/* 🔥 내부 DB 컬럼 */}
+                                      {targetType === "internal" &&
+                                        targetColumns.map((col) => (
+                                          <CommandItem
+                                            key={col.columnName}
+                                            value={col.columnName}
+                                            onSelect={(currentValue) => {
+                                              handleMappingChange(index, "targetField", currentValue);
+                                              const newState = [...mappingTargetFieldsOpenState];
+                                              newState[index] = false;
+                                              setMappingTargetFieldsOpenState(newState);
+                                            }}
+                                            className="text-xs sm:text-sm"
+                                          >
+                                            <Check
+                                              className={cn(
+                                                "mr-2 h-4 w-4",
+                                                mapping.targetField === col.columnName ? "opacity-100" : "opacity-0",
+                                              )}
+                                            />
+                                            <div className="flex flex-col">
+                                              <span className="font-mono font-medium">
+                                                {col.columnLabel || col.columnName}
+                                              </span>
+                                              <span className="text-muted-foreground text-[10px]">
+                                                {col.dataType}
+                                                {col.columnDefault ? (
+                                                  <span className="text-blue-600"> 🔵기본값</span>
+                                                ) : (
+                                                  !col.isNullable && <span className="text-red-500"> *필수</span>
+                                                )}
+                                              </span>
+                                            </div>
+                                          </CommandItem>
+                                        ))}
 
-                                {/* 🔥 외부 DB 컬럼 */}
-                                {targetType === "external" &&
-                                  externalColumns.map((col) => (
-                                    <SelectItem key={col.column_name} value={col.column_name} className="text-xs">
-                                      <div className="flex items-center justify-between gap-2">
-                                        <span className="font-mono">{col.column_name}</span>
-                                        <span className="text-muted-foreground">{col.data_type}</span>
-                                      </div>
-                                    </SelectItem>
-                                  ))}
-                              </SelectContent>
-                            </Select>
+                                      {/* 🔥 외부 DB 컬럼 */}
+                                      {targetType === "external" &&
+                                        externalColumns.map((col) => (
+                                          <CommandItem
+                                            key={col.column_name}
+                                            value={col.column_name}
+                                            onSelect={(currentValue) => {
+                                              handleMappingChange(index, "targetField", currentValue);
+                                              const newState = [...mappingTargetFieldsOpenState];
+                                              newState[index] = false;
+                                              setMappingTargetFieldsOpenState(newState);
+                                            }}
+                                            className="text-xs sm:text-sm"
+                                          >
+                                            <Check
+                                              className={cn(
+                                                "mr-2 h-4 w-4",
+                                                mapping.targetField === col.column_name ? "opacity-100" : "opacity-0",
+                                              )}
+                                            />
+                                            <div className="flex flex-col">
+                                              <span className="font-mono font-medium">{col.column_name}</span>
+                                              <span className="text-muted-foreground text-[10px]">{col.data_type}</span>
+                                            </div>
+                                          </CommandItem>
+                                        ))}
+                                    </CommandGroup>
+                                  </CommandList>
+                                </Command>
+                              </PopoverContent>
+                            </Popover>
                           </div>
 
                           {/* 정적 값 */}

frontend/components/dataflow/node-editor/panels/properties/ReferenceLookupProperties.tsx

@@ -5,14 +5,13 @@
  */
 
 import { useEffect, useState, useCallback } from "react";
-import { Plus, Trash2, Search } from "lucide-react";
+import { Plus, Trash2, Search, Check, ChevronsUpDown } from "lucide-react";
 import { Label } from "@/components/ui/label";
 import { Input } from "@/components/ui/input";
 import { Button } from "@/components/ui/button";
 import { Select, SelectContent, SelectItem, SelectTrigger, SelectValue } from "@/components/ui/select";
 import { Popover, PopoverContent, PopoverTrigger } from "@/components/ui/popover";
 import { Command, CommandEmpty, CommandGroup, CommandInput, CommandItem, CommandList } from "@/components/ui/command";
-import { Check } from "lucide-react";
 import { cn } from "@/lib/utils";
 import { useFlowEditorStore } from "@/lib/stores/flowEditorStore";
 import type { ReferenceLookupNodeData } from "@/types/node-editor";
@@ -62,6 +61,9 @@ export function ReferenceLookupProperties({ nodeId, data }: ReferenceLookupPrope
   const [referenceColumns, setReferenceColumns] = useState<FieldDefinition[]>([]);
   const [columnsLoading, setColumnsLoading] = useState(false);
 
+  // Combobox 열림 상태 관리
+  const [whereFieldOpenState, setWhereFieldOpenState] = useState<boolean[]>([]);
+
   // 데이터 변경 시 로컬 상태 동기화
   useEffect(() => {
     setDisplayName(data.displayName || "참조 조회");
@@ -72,6 +74,11 @@ export function ReferenceLookupProperties({ nodeId, data }: ReferenceLookupPrope
     setOutputFields(data.outputFields || []);
   }, [data]);
 
+  // whereConditions 변경 시 whereFieldOpenState 초기화
+  useEffect(() => {
+    setWhereFieldOpenState(new Array(whereConditions.length).fill(false));
+  }, [whereConditions.length]);
+
   // 🔍 소스 필드 수집 (업스트림 노드에서)
   useEffect(() => {
     const incomingEdges = edges.filter((e) => e.target === nodeId);
@@ -187,7 +194,7 @@ export function ReferenceLookupProperties({ nodeId, data }: ReferenceLookupPrope
 
   // WHERE 조건 추가
   const handleAddWhereCondition = () => {
-    setWhereConditions([
+    const newConditions = [
       ...whereConditions,
       {
         field: "",
@@ -195,11 +202,15 @@ export function ReferenceLookupProperties({ nodeId, data }: ReferenceLookupPrope
         value: "",
         valueType: "static",
       },
-    ]);
+    ];
+    setWhereConditions(newConditions);
+    setWhereFieldOpenState(new Array(newConditions.length).fill(false));
   };
 
   const handleRemoveWhereCondition = (index: number) => {
-    setWhereConditions(whereConditions.filter((_, i) => i !== index));
+    const newConditions = whereConditions.filter((_, i) => i !== index);
+    setWhereConditions(newConditions);
+    setWhereFieldOpenState(new Array(newConditions.length).fill(false));
   };
 
   const handleWhereConditionChange = (index: number, field: string, value: any) => {
@@ -455,23 +466,81 @@ export function ReferenceLookupProperties({ nodeId, data }: ReferenceLookupPrope
                   </div>
 
                   <div className="space-y-2">
+                    {/* 필드 - Combobox */}
                     <div>
                       <Label className="text-xs text-gray-600">필드</Label>
-                      <Select
-                        value={condition.field}
-                        onValueChange={(value) => handleWhereConditionChange(index, "field", value)}
+                      <Popover
+                        open={whereFieldOpenState[index]}
+                        onOpenChange={(open) => {
+                          const newState = [...whereFieldOpenState];
+                          newState[index] = open;
+                          setWhereFieldOpenState(newState);
+                        }}
                       >
-                        <SelectTrigger className="mt-1 h-8 text-xs">
-                          <SelectValue placeholder="필드 선택" />
-                        </SelectTrigger>
-                        <SelectContent>
-                          {referenceColumns.map((field) => (
-                            <SelectItem key={field.name} value={field.name}>
-                              {field.label || field.name}
-                            </SelectItem>
-                          ))}
-                        </SelectContent>
-                      </Select>
+                        <PopoverTrigger asChild>
+                          <Button
+                            variant="outline"
+                            role="combobox"
+                            aria-expanded={whereFieldOpenState[index]}
+                            className="mt-1 h-8 w-full justify-between text-xs sm:h-10 sm:text-sm"
+                          >
+                            {condition.field
+                              ? (() => {
+                                  const field = referenceColumns.find((f) => f.name === condition.field);
+                                  return (
+                                    <div className="flex items-center justify-between gap-2 overflow-hidden">
+                                      <span className="truncate">{field?.label || condition.field}</span>
+                                      {field?.type && (
+                                        <span className="text-muted-foreground text-xs">{field.type}</span>
+                                      )}
+                                    </div>
+                                  );
+                                })()
+                              : "필드 선택"}
+                            <ChevronsUpDown className="ml-2 h-4 w-4 shrink-0 opacity-50" />
+                          </Button>
+                        </PopoverTrigger>
+                        <PopoverContent
+                          className="p-0"
+                          style={{ width: "var(--radix-popover-trigger-width)" }}
+                          align="start"
+                        >
+                          <Command>
+                            <CommandInput placeholder="필드 검색..." className="text-xs sm:text-sm" />
+                            <CommandList>
+                              <CommandEmpty className="text-xs sm:text-sm">필드를 찾을 수 없습니다.</CommandEmpty>
+                              <CommandGroup>
+                                {referenceColumns.map((field) => (
+                                  <CommandItem
+                                    key={field.name}
+                                    value={field.name}
+                                    onSelect={(currentValue) => {
+                                      handleWhereConditionChange(index, "field", currentValue);
+                                      const newState = [...whereFieldOpenState];
+                                      newState[index] = false;
+                                      setWhereFieldOpenState(newState);
+                                    }}
+                                    className="text-xs sm:text-sm"
+                                  >
+                                    <Check
+                                      className={cn(
+                                        "mr-2 h-4 w-4",
+                                        condition.field === field.name ? "opacity-100" : "opacity-0",
+                                      )}
+                                    />
+                                    <div className="flex flex-col">
+                                      <span className="font-medium">{field.label || field.name}</span>
+                                      {field.type && (
+                                        <span className="text-muted-foreground text-[10px]">{field.type}</span>
+                                      )}
+                                    </div>
+                                  </CommandItem>
+                                ))}
+                              </CommandGroup>
+                            </CommandList>
+                          </Command>
+                        </PopoverContent>
+                      </Popover>
                     </div>
 
                     <div>

frontend/components/dataflow/node-editor/panels/properties/UpsertActionProperties.tsx

@@ -37,6 +37,7 @@ interface ColumnInfo {
   columnLabel?: string;
   dataType: string;
   isNullable: boolean;
+  columnDefault?: string | null;
 }
 
 export function UpsertActionProperties({ nodeId, data }: UpsertActionPropertiesProps) {
@@ -85,6 +86,11 @@ export function UpsertActionProperties({ nodeId, data }: UpsertActionPropertiesP
   // REST API 소스 노드 연결 여부
   const [hasRestAPISource, setHasRestAPISource] = useState(false);
 
+  // Combobox 열림 상태 관리
+  const [conflictKeysOpenState, setConflictKeysOpenState] = useState<boolean[]>([]);
+  const [mappingSourceFieldsOpenState, setMappingSourceFieldsOpenState] = useState<boolean[]>([]);
+  const [mappingTargetFieldsOpenState, setMappingTargetFieldsOpenState] = useState<boolean[]>([]);
+
   // 데이터 변경 시 로컬 상태 업데이트
   useEffect(() => {
     setDisplayName(data.displayName || data.targetTable);
@@ -129,6 +135,17 @@ export function UpsertActionProperties({ nodeId, data }: UpsertActionPropertiesP
     }
   }, [targetType, selectedExternalConnectionId, externalTargetTable]);
 
+  // conflictKeys 변경 시 Combobox 열림 상태 초기화
+  useEffect(() => {
+    setConflictKeysOpenState(new Array(conflictKeys.length).fill(false));
+  }, [conflictKeys.length]);
+
+  // fieldMappings 변경 시 Combobox 열림 상태 초기화
+  useEffect(() => {
+    setMappingSourceFieldsOpenState(new Array(fieldMappings.length).fill(false));
+    setMappingTargetFieldsOpenState(new Array(fieldMappings.length).fill(false));
+  }, [fieldMappings.length]);
+
   // 연결된 소스 노드에서 필드 가져오기 (재귀적으로 모든 상위 노드 탐색)
   useEffect(() => {
     const getAllSourceFields = (
@@ -326,12 +343,27 @@ export function UpsertActionProperties({ nodeId, data }: UpsertActionPropertiesP
       setColumnsLoading(true);
       const columns = await tableTypeApi.getColumns(tableName);
 
-      const columnInfo: ColumnInfo[] = columns.map((col: any) => ({
-        columnName: col.column_name || col.columnName,
-        columnLabel: col.label_ko || col.columnLabel,
-        dataType: col.data_type || col.dataType || "unknown",
-        isNullable: col.is_nullable === "YES" || col.isNullable === true,
-      }));
+      const columnInfo: ColumnInfo[] = columns.map((col: any) => {
+        // is_nullable 파싱: "YES", true, 1 등을 true로, "NO", false, 0 등을 false로 변환
+        const isNullableValue = col.is_nullable ?? col.isNullable;
+        let isNullable = true; // 기본값: nullable
+
+        if (typeof isNullableValue === "boolean") {
+          isNullable = isNullableValue;
+        } else if (typeof isNullableValue === "string") {
+          isNullable = isNullableValue.toUpperCase() === "YES" || isNullableValue.toUpperCase() === "TRUE";
+        } else if (typeof isNullableValue === "number") {
+          isNullable = isNullableValue !== 0;
+        }
+
+        return {
+          columnName: col.column_name || col.columnName,
+          columnLabel: col.label_ko || col.columnLabel,
+          dataType: col.data_type || col.dataType || "unknown",
+          isNullable,
+          columnDefault: col.column_default ?? col.columnDefault ?? null,
+        };
+      });
 
       setTargetColumns(columnInfo);
     } catch (error) {
@@ -401,12 +433,20 @@ export function UpsertActionProperties({ nodeId, data }: UpsertActionPropertiesP
     ];
     setFieldMappings(newMappings);
     updateNode(nodeId, { fieldMappings: newMappings });
+
+    // Combobox 열림 상태 배열 초기화
+    setMappingSourceFieldsOpenState(new Array(newMappings.length).fill(false));
+    setMappingTargetFieldsOpenState(new Array(newMappings.length).fill(false));
   };
 
   const handleRemoveMapping = (index: number) => {
     const newMappings = fieldMappings.filter((_, i) => i !== index);
     setFieldMappings(newMappings);
     updateNode(nodeId, { fieldMappings: newMappings });
+
+    // Combobox 열림 상태 배열도 업데이트
+    setMappingSourceFieldsOpenState(new Array(newMappings.length).fill(false));
+    setMappingTargetFieldsOpenState(new Array(newMappings.length).fill(false));
   };
 
   const handleMappingChange = (index: number, field: string, value: any) => {
@@ -934,24 +974,46 @@ export function UpsertActionProperties({ nodeId, data }: UpsertActionPropertiesP
                 </div>
               )}
 
-              {/* 충돌 키 추가 드롭다운 */}
-              <Select onValueChange={handleAddConflictKey}>
-                <SelectTrigger className="h-8 text-xs">
-                  <SelectValue placeholder="충돌 키 추가..." />
-                </SelectTrigger>
-                <SelectContent>
-                  {targetColumns
-                    .filter((col) => !conflictKeys.includes(col.columnName))
-                    .map((col) => (
-                      <SelectItem key={col.columnName} value={col.columnName} className="text-xs">
-                        <div className="flex items-center justify-between gap-2">
-                          <span className="font-mono">{col.columnLabel || col.columnName}</span>
-                          <span className="text-muted-foreground">{col.dataType}</span>
-                        </div>
-                      </SelectItem>
-                    ))}
-                </SelectContent>
-              </Select>
+              {/* 충돌 키 추가 Combobox */}
+              <Popover>
+                <PopoverTrigger asChild>
+                  <Button
+                    variant="outline"
+                    role="combobox"
+                    className="h-8 w-full justify-between text-xs sm:h-10 sm:text-sm"
+                  >
+                    충돌 키 추가...
+                    <ChevronsUpDown className="ml-2 h-4 w-4 shrink-0 opacity-50" />
+                  </Button>
+                </PopoverTrigger>
+                <PopoverContent className="p-0" style={{ width: "var(--radix-popover-trigger-width)" }} align="start">
+                  <Command>
+                    <CommandInput placeholder="충돌 키 검색..." className="text-xs sm:text-sm" />
+                    <CommandList>
+                      <CommandEmpty className="text-xs sm:text-sm">필드를 찾을 수 없습니다.</CommandEmpty>
+                      <CommandGroup>
+                        {targetColumns
+                          .filter((col) => !conflictKeys.includes(col.columnName))
+                          .map((col) => (
+                            <CommandItem
+                              key={col.columnName}
+                              value={col.columnName}
+                              onSelect={(currentValue) => {
+                                handleAddConflictKey(currentValue);
+                              }}
+                              className="text-xs sm:text-sm"
+                            >
+                              <div className="flex flex-col">
+                                <span className="font-mono font-medium">{col.columnLabel || col.columnName}</span>
+                                <span className="text-muted-foreground text-[10px]">{col.dataType}</span>
+                              </div>
+                            </CommandItem>
+                          ))}
+                      </CommandGroup>
+                    </CommandList>
+                  </Command>
+                </PopoverContent>
+              </Popover>
             </>
           )}
         </div>
@@ -1010,32 +1072,84 @@ export function UpsertActionProperties({ nodeId, data }: UpsertActionPropertiesP
                               className="mt-1 h-8 text-xs"
                             />
                           ) : (
-                            <Select
-                              value={mapping.sourceField || ""}
-                              onValueChange={(value) => handleMappingChange(index, "sourceField", value || null)}
+                            <Popover
+                              open={mappingSourceFieldsOpenState[index]}
+                              onOpenChange={(open) => {
+                                const newState = [...mappingSourceFieldsOpenState];
+                                newState[index] = open;
+                                setMappingSourceFieldsOpenState(newState);
+                              }}
                             >
-                              <SelectTrigger className="mt-1 h-8 text-xs">
-                                <SelectValue placeholder="소스 필드 선택" />
-                              </SelectTrigger>
-                              <SelectContent>
-                                {sourceFields.length === 0 ? (
-                                  <div className="p-2 text-center text-xs text-gray-400">
-                                    연결된 소스 노드가 없습니다
-                                  </div>
-                                ) : (
-                                  sourceFields.map((field) => (
-                                    <SelectItem key={field.name} value={field.name} className="text-xs">
-                                      <div className="flex items-center justify-between gap-2">
-                                        <span className="font-medium">{field.label || field.name}</span>
-                                        {field.label && field.label !== field.name && (
-                                          <span className="text-muted-foreground font-mono text-xs">{field.name}</span>
-                                        )}
-                                      </div>
-                                    </SelectItem>
-                                  ))
-                                )}
-                              </SelectContent>
-                            </Select>
+                              <PopoverTrigger asChild>
+                                <Button
+                                  variant="outline"
+                                  role="combobox"
+                                  aria-expanded={mappingSourceFieldsOpenState[index]}
+                                  className="mt-1 h-8 w-full justify-between text-xs sm:h-10 sm:text-sm"
+                                >
+                                  {mapping.sourceField
+                                    ? (() => {
+                                        const field = sourceFields.find((f) => f.name === mapping.sourceField);
+                                        return (
+                                          <div className="flex items-center justify-between gap-2 overflow-hidden">
+                                            <span className="truncate font-medium">
+                                              {field?.label || mapping.sourceField}
+                                            </span>
+                                            {field?.label && field.label !== field.name && (
+                                              <span className="text-muted-foreground font-mono text-xs">
+                                                {field.name}
+                                              </span>
+                                            )}
+                                          </div>
+                                        );
+                                      })()
+                                    : "소스 필드 선택"}
+                                  <ChevronsUpDown className="ml-2 h-4 w-4 shrink-0 opacity-50" />
+                                </Button>
+                              </PopoverTrigger>
+                              <PopoverContent
+                                className="p-0"
+                                style={{ width: "var(--radix-popover-trigger-width)" }}
+                                align="start"
+                              >
+                                <Command>
+                                  <CommandInput placeholder="소스 필드 검색..." className="text-xs sm:text-sm" />
+                                  <CommandList>
+                                    <CommandEmpty className="text-xs sm:text-sm">필드를 찾을 수 없습니다.</CommandEmpty>
+                                    <CommandGroup>
+                                      {sourceFields.map((field) => (
+                                        <CommandItem
+                                          key={field.name}
+                                          value={field.name}
+                                          onSelect={(currentValue) => {
+                                            handleMappingChange(index, "sourceField", currentValue || null);
+                                            const newState = [...mappingSourceFieldsOpenState];
+                                            newState[index] = false;
+                                            setMappingSourceFieldsOpenState(newState);
+                                          }}
+                                          className="text-xs sm:text-sm"
+                                        >
+                                          <Check
+                                            className={cn(
+                                              "mr-2 h-4 w-4",
+                                              mapping.sourceField === field.name ? "opacity-100" : "opacity-0",
+                                            )}
+                                          />
+                                          <div className="flex flex-col">
+                                            <span className="font-medium">{field.label || field.name}</span>
+                                            {field.label && field.label !== field.name && (
+                                              <span className="text-muted-foreground font-mono text-[10px]">
+                                                {field.name}
+                                              </span>
+                                            )}
+                                          </div>
+                                        </CommandItem>
+                                      ))}
+                                    </CommandGroup>
+                                  </CommandList>
+                                </Command>
+                              </PopoverContent>
+                            </Popover>
                           )}
                         </div>
 
@@ -1043,30 +1157,91 @@ export function UpsertActionProperties({ nodeId, data }: UpsertActionPropertiesP
                           <ArrowRight className="h-4 w-4 text-purple-600" />
                         </div>
 
-                        {/* 타겟 필드 드롭다운 */}
+                        {/* 타겟 필드 Combobox */}
                         <div>
                           <Label className="text-xs text-gray-600">타겟 필드</Label>
-                          <Select
-                            value={mapping.targetField}
-                            onValueChange={(value) => handleMappingChange(index, "targetField", value)}
+                          <Popover
+                            open={mappingTargetFieldsOpenState[index]}
+                            onOpenChange={(open) => {
+                              const newState = [...mappingTargetFieldsOpenState];
+                              newState[index] = open;
+                              setMappingTargetFieldsOpenState(newState);
+                            }}
                           >
-                            <SelectTrigger className="mt-1 h-8 text-xs">
-                              <SelectValue placeholder="타겟 필드 선택" />
-                            </SelectTrigger>
-                            <SelectContent>
-                              {targetColumns.map((col) => (
-                                <SelectItem key={col.columnName} value={col.columnName} className="text-xs">
-                                  <div className="flex items-center justify-between gap-2">
-                                    <span className="font-mono">{col.columnLabel || col.columnName}</span>
-                                    <span className="text-muted-foreground">
-                                      {col.dataType}
-                                      {!col.isNullable && <span className="text-red-500">*</span>}
-                                    </span>
-                                  </div>
-                                </SelectItem>
-                              ))}
-                            </SelectContent>
-                          </Select>
+                            <PopoverTrigger asChild>
+                              <Button
+                                variant="outline"
+                                role="combobox"
+                                aria-expanded={mappingTargetFieldsOpenState[index]}
+                                className="mt-1 h-8 w-full justify-between text-xs sm:h-10 sm:text-sm"
+                              >
+                                {mapping.targetField
+                                  ? (() => {
+                                      const col = targetColumns.find((c) => c.columnName === mapping.targetField);
+                                      return (
+                                        <div className="flex items-center justify-between gap-2 overflow-hidden">
+                                          <span className="truncate font-mono">
+                                            {col?.columnLabel || mapping.targetField}
+                                          </span>
+                                          <span className="text-muted-foreground text-xs">
+                                            {col?.dataType}
+                                            {col && !col.isNullable && <span className="text-red-500">*</span>}
+                                          </span>
+                                        </div>
+                                      );
+                                    })()
+                                  : "타겟 필드 선택"}
+                                <ChevronsUpDown className="ml-2 h-4 w-4 shrink-0 opacity-50" />
+                              </Button>
+                            </PopoverTrigger>
+                            <PopoverContent
+                              className="p-0"
+                              style={{ width: "var(--radix-popover-trigger-width)" }}
+                              align="start"
+                            >
+                              <Command>
+                                <CommandInput placeholder="타겟 필드 검색..." className="text-xs sm:text-sm" />
+                                <CommandList>
+                                  <CommandEmpty className="text-xs sm:text-sm">필드를 찾을 수 없습니다.</CommandEmpty>
+                                  <CommandGroup>
+                                    {targetColumns.map((col) => (
+                                      <CommandItem
+                                        key={col.columnName}
+                                        value={col.columnName}
+                                        onSelect={(currentValue) => {
+                                          handleMappingChange(index, "targetField", currentValue);
+                                          const newState = [...mappingTargetFieldsOpenState];
+                                          newState[index] = false;
+                                          setMappingTargetFieldsOpenState(newState);
+                                        }}
+                                        className="text-xs sm:text-sm"
+                                      >
+                                        <Check
+                                          className={cn(
+                                            "mr-2 h-4 w-4",
+                                            mapping.targetField === col.columnName ? "opacity-100" : "opacity-0",
+                                          )}
+                                        />
+                                        <div className="flex flex-col">
+                                          <span className="font-mono font-medium">
+                                            {col.columnLabel || col.columnName}
+                                          </span>
+                                          <span className="text-muted-foreground text-[10px]">
+                                            {col.dataType}
+                                            {col.columnDefault ? (
+                                              <span className="text-blue-600"> 🔵기본값</span>
+                                            ) : (
+                                              !col.isNullable && <span className="text-red-500"> *필수</span>
+                                            )}
+                                          </span>
+                                        </div>
+                                      </CommandItem>
+                                    ))}
+                                  </CommandGroup>
+                                </CommandList>
+                              </Command>
+                            </PopoverContent>
+                          </Popover>
                         </div>
 
                         {/* 정적 값 */}
@@ -1092,7 +1267,6 @@ export function UpsertActionProperties({ nodeId, data }: UpsertActionPropertiesP
             </>
           )}
         </div>
-
       </div>
     </div>
   );

frontend/components/dataflow/node-editor/sidebar/NodePalette.tsx

@@ -11,7 +11,7 @@ import type { NodePaletteItem } from "@/types/node-editor";
 
 export function NodePalette() {
   const [expandedCategories, setExpandedCategories] = useState<Set<string>>(
-    new Set(["source", "transform", "action", "utility"]),
+    new Set(), // 기본적으로 모든 아코디언 닫힘
   );
 
   const toggleCategory = (categoryId: string) => {

frontend/components/screen/ScreenDesigner.tsx

@@ -3076,7 +3076,7 @@ export default function ScreenDesigner({ selectedScreen, onBackToList }: ScreenD
           })
         : null;
 
-      // 일반 컴포넌트만 격자 스냅 적용 (그룹 제외)
+      // 일반 컴포넌트 및 플로우 버튼 그룹에 격자 스냅 적용 (일반 그룹 제외)
       if (draggedComponent?.type !== "group" && layout.gridSettings?.snapToGrid && currentGridInfo) {
         finalPosition = snapToGrid(
           {
@@ -3094,6 +3094,7 @@ export default function ScreenDesigner({ selectedScreen, onBackToList }: ScreenD
         );
 
         console.log("🎯 격자 스냅 적용됨:", {
+          componentType: draggedComponent?.type,
           resolution: `${screenResolution.width}x${screenResolution.height}`,
           originalPosition: dragState.currentPosition,
           snappedPosition: finalPosition,
@@ -3516,12 +3517,79 @@ export default function ScreenDesigner({ selectedScreen, onBackToList }: ScreenD
       // 고유한 그룹 ID 생성
       const newGroupId = generateGroupId();
 
-      // 버튼들을 그룹으로 묶기 (설정 포함)
+      // 🔧 그룹 위치 및 버튼 재배치 계산
+      const align = settings.align;
+      const direction = settings.direction;
+      const gap = settings.gap;
+
+      const groupY = Math.min(...selectedComponents.map((b) => b.position.y));
+      let anchorButton; // 기준이 되는 버튼
+      let groupX: number;
+
+      // align에 따라 기준 버튼과 그룹 시작점 결정
+      if (direction === "horizontal") {
+        if (align === "end") {
+          // 끝점 정렬: 가장 오른쪽 버튼이 기준
+          anchorButton = selectedComponents.reduce((max, btn) => {
+            const rightEdge = btn.position.x + (btn.size?.width || 100);
+            const maxRightEdge = max.position.x + (max.size?.width || 100);
+            return rightEdge > maxRightEdge ? btn : max;
+          });
+
+          // 전체 그룹 너비 계산
+          const totalWidth = selectedComponents.reduce((total, btn, index) => {
+            const buttonWidth = btn.size?.width || 100;
+            const gapWidth = index < selectedComponents.length - 1 ? gap : 0;
+            return total + buttonWidth + gapWidth;
+          }, 0);
+
+          // 그룹 시작점 = 기준 버튼의 오른쪽 끝 - 전체 그룹 너비
+          groupX = anchorButton.position.x + (anchorButton.size?.width || 100) - totalWidth;
+        } else if (align === "center") {
+          // 중앙 정렬: 버튼들의 중심점을 기준으로
+          const minX = Math.min(...selectedComponents.map((b) => b.position.x));
+          const maxX = Math.max(...selectedComponents.map((b) => b.position.x + (b.size?.width || 100)));
+          const centerX = (minX + maxX) / 2;
+
+          const totalWidth = selectedComponents.reduce((total, btn, index) => {
+            const buttonWidth = btn.size?.width || 100;
+            const gapWidth = index < selectedComponents.length - 1 ? gap : 0;
+            return total + buttonWidth + gapWidth;
+          }, 0);
+
+          groupX = centerX - totalWidth / 2;
+          anchorButton = selectedComponents[0]; // 중앙 정렬은 첫 번째 버튼 기준
+        } else {
+          // 시작점 정렬: 가장 왼쪽 버튼이 기준
+          anchorButton = selectedComponents.reduce((min, btn) => {
+            return btn.position.x < min.position.x ? btn : min;
+          });
+          groupX = anchorButton.position.x;
+        }
+      } else {
+        // 세로 정렬: 가장 위쪽 버튼이 기준
+        anchorButton = selectedComponents.reduce((min, btn) => {
+          return btn.position.y < min.position.y ? btn : min;
+        });
+        groupX = Math.min(...selectedComponents.map((b) => b.position.x));
+      }
+
+      // 🔧 버튼들의 위치를 그룹 기준으로 재배치
+      // 기준 버튼의 절대 위치를 유지하고, FlexBox가 나머지를 자동 정렬
       const groupedButtons = selectedComponents.map((button) => {
         const currentConfig = (button as any).webTypeConfig?.flowVisibilityConfig || {};
 
+        // 모든 버튼을 그룹 시작점에 배치
+        // FlexBox가 자동으로 정렬하여 기준 버튼의 위치가 유지됨
+        const newPosition = {
+          x: groupX,
+          y: groupY,
+          z: button.position.z || 1,
+        };
+
         return {
           ...button,
+          position: newPosition,
           webTypeConfig: {
             ...(button as any).webTypeConfig,
             flowVisibilityConfig: {
@@ -3558,7 +3626,8 @@ export default function ScreenDesigner({ selectedScreen, onBackToList }: ScreenD
       console.log("✅ 플로우 버튼 그룹 생성 완료:", {
         groupId: newGroupId,
         buttonCount: selectedComponents.length,
-        buttons: selectedComponents.map((b) => b.id),
+        buttons: selectedComponents.map((b) => ({ id: b.id, position: b.position })),
+        groupPosition: { x: groupX, y: groupY },
         settings,
       });
     },
@@ -4316,86 +4385,109 @@ export default function ScreenDesigner({ selectedScreen, onBackToList }: ScreenD
           <div className="bg-card text-foreground border-border pointer-events-none fixed right-6 bottom-6 z-50 rounded-lg border px-4 py-2 text-sm font-medium shadow-md">
             🔍 {Math.round(zoomLevel * 100)}%
           </div>
-          {/* 🆕 플로우 버튼 그룹 제어 (다중 선택 시 표시) */}
-          {groupState.selectedComponents.length >= 2 && (
-            <div className="bg-card border-border fixed right-6 bottom-20 z-50 rounded-lg border shadow-lg">
-              <div className="flex flex-col gap-2 p-3">
-                <div className="mb-1 flex items-center gap-2 text-xs text-gray-600">
-                  <svg
-                    xmlns="http://www.w3.org/2000/svg"
-                    width="14"
-                    height="14"
-                    viewBox="0 0 24 24"
-                    fill="none"
-                    stroke="currentColor"
-                    strokeWidth="2"
-                    strokeLinecap="round"
-                    strokeLinejoin="round"
-                  >
-                    <path d="M21 16V8a2 2 0 0 0-1-1.73l-7-4a2 2 0 0 0-2 0l-7 4A2 2 0 0 0 3 8v8a2 2 0 0 0 1 1.73l7 4a2 2 0 0 0 2 0l7-4A2 2 0 0 0 21 16z"></path>
-                    <polyline points="3.29 7 12 12 20.71 7"></polyline>
-                    <line x1="12" y1="22" x2="12" y2="12"></line>
-                  </svg>
-                  <span className="font-medium">{groupState.selectedComponents.length}개 선택됨</span>
+          {/* 🆕 플로우 버튼 그룹 제어 (버튼 선택 시 표시) */}
+          {(() => {
+            // 선택된 컴포넌트들
+            const selectedComps = layout.components.filter((c) => groupState.selectedComponents.includes(c.id));
+
+            // 버튼 컴포넌트만 필터링
+            const selectedButtons = selectedComps.filter((comp) => areAllButtons([comp]));
+
+            // 플로우 그룹에 속한 버튼이 있는지 확인
+            const hasFlowGroupButton = selectedButtons.some((btn) => {
+              const flowConfig = (btn as any).webTypeConfig?.flowVisibilityConfig;
+              return flowConfig?.enabled && flowConfig.layoutBehavior === "auto-compact" && flowConfig.groupId;
+            });
+
+            // 버튼이 선택되었거나 플로우 그룹 버튼이 있으면 표시
+            const shouldShow = selectedButtons.length >= 1 && (selectedButtons.length >= 2 || hasFlowGroupButton);
+
+            if (!shouldShow) return null;
+
+            return (
+              <div className="bg-card border-border fixed right-6 bottom-20 z-50 rounded-lg border shadow-lg">
+                <div className="flex flex-col gap-2 p-3">
+                  <div className="mb-1 flex items-center gap-2 text-xs text-gray-600">
+                    <svg
+                      xmlns="http://www.w3.org/2000/svg"
+                      width="14"
+                      height="14"
+                      viewBox="0 0 24 24"
+                      fill="none"
+                      stroke="currentColor"
+                      strokeWidth="2"
+                      strokeLinecap="round"
+                      strokeLinejoin="round"
+                    >
+                      <path d="M21 16V8a2 2 0 0 0-1-1.73l-7-4a2 2 0 0 0-2 0l-7 4A2 2 0 0 0 3 8v8a2 2 0 0 0 1 1.73l7 4a2 2 0 0 0 2 0l7-4A2 2 0 0 0 21 16z"></path>
+                      <polyline points="3.29 7 12 12 20.71 7"></polyline>
+                      <line x1="12" y1="22" x2="12" y2="12"></line>
+                    </svg>
+                    <span className="font-medium">{selectedButtons.length}개 버튼 선택됨</span>
+                  </div>
+
+                  {/* 그룹 생성 버튼 (2개 이상 선택 시) */}
+                  {selectedButtons.length >= 2 && (
+                    <Button
+                      size="sm"
+                      variant="default"
+                      onClick={handleFlowButtonGroup}
+                      disabled={selectedButtons.length < 2}
+                      className="flex items-center gap-2 text-xs"
+                    >
+                      <svg
+                        xmlns="http://www.w3.org/2000/svg"
+                        width="14"
+                        height="14"
+                        viewBox="0 0 24 24"
+                        fill="none"
+                        stroke="currentColor"
+                        strokeWidth="2"
+                        strokeLinecap="round"
+                        strokeLinejoin="round"
+                      >
+                        <rect x="3" y="3" width="18" height="18" rx="2" ry="2"></rect>
+                        <line x1="9" y1="3" x2="9" y2="21"></line>
+                        <line x1="15" y1="3" x2="15" y2="21"></line>
+                      </svg>
+                      플로우 그룹으로 묶기
+                    </Button>
+                  )}
+
+                  {/* 그룹 해제 버튼 (플로우 그룹 버튼이 있으면 항상 표시) */}
+                  {hasFlowGroupButton && (
+                    <Button
+                      size="sm"
+                      variant="outline"
+                      onClick={handleFlowButtonUngroup}
+                      className="flex items-center gap-2 text-xs"
+                    >
+                      <svg
+                        xmlns="http://www.w3.org/2000/svg"
+                        width="14"
+                        height="14"
+                        viewBox="0 0 24 24"
+                        fill="none"
+                        stroke="currentColor"
+                        strokeWidth="2"
+                        strokeLinecap="round"
+                        strokeLinejoin="round"
+                      >
+                        <rect x="3" y="3" width="7" height="7"></rect>
+                        <rect x="14" y="3" width="7" height="7"></rect>
+                        <rect x="14" y="14" width="7" height="7"></rect>
+                        <rect x="3" y="14" width="7" height="7"></rect>
+                      </svg>
+                      그룹 해제
+                    </Button>
+                  )}
+
+                  {/* 상태 표시 */}
+                  {hasFlowGroupButton && <p className="mt-1 text-[10px] text-blue-600">✓ 플로우 그룹 버튼</p>}
                 </div>
-                <Button
-                  size="sm"
-                  variant="default"
-                  onClick={handleFlowButtonGroup}
-                  disabled={
-                    !areAllButtons(layout.components.filter((c) => groupState.selectedComponents.includes(c.id)))
-                  }
-                  className="flex items-center gap-2 text-xs"
-                >
-                  <svg
-                    xmlns="http://www.w3.org/2000/svg"
-                    width="14"
-                    height="14"
-                    viewBox="0 0 24 24"
-                    fill="none"
-                    stroke="currentColor"
-                    strokeWidth="2"
-                    strokeLinecap="round"
-                    strokeLinejoin="round"
-                  >
-                    <rect x="3" y="3" width="18" height="18" rx="2" ry="2"></rect>
-                    <line x1="9" y1="3" x2="9" y2="21"></line>
-                    <line x1="15" y1="3" x2="15" y2="21"></line>
-                  </svg>
-                  플로우 그룹으로 묶기
-                </Button>
-                <Button
-                  size="sm"
-                  variant="outline"
-                  onClick={handleFlowButtonUngroup}
-                  className="flex items-center gap-2 text-xs"
-                >
-                  <svg
-                    xmlns="http://www.w3.org/2000/svg"
-                    width="14"
-                    height="14"
-                    viewBox="0 0 24 24"
-                    fill="none"
-                    stroke="currentColor"
-                    strokeWidth="2"
-                    strokeLinecap="round"
-                    strokeLinejoin="round"
-                  >
-                    <rect x="3" y="3" width="7" height="7"></rect>
-                    <rect x="14" y="3" width="7" height="7"></rect>
-                    <rect x="14" y="14" width="7" height="7"></rect>
-                    <rect x="3" y="14" width="7" height="7"></rect>
-                  </svg>
-                  그룹 해제
-                </Button>
-                {areAllButtons(layout.components.filter((c) => groupState.selectedComponents.includes(c.id))) ? (
-                  <p className="mt-1 text-[10px] text-green-600">✓ 모두 버튼 컴포넌트</p>
-                ) : (
-                  <p className="mt-1 text-[10px] text-orange-600">⚠ 버튼만 그룹 가능</p>
-                )}
               </div>
-            </div>
-          )}
+            );
+          })()}
           {/* 🔥 줌 적용 시 스크롤 영역 확보를 위한 래퍼 */}
           <div
             className="flex justify-center"
@@ -4707,20 +4799,20 @@ export default function ScreenDesigner({ selectedScreen, onBackToList }: ScreenD
                         const groupConfig = (firstButton as any).webTypeConfig
                           ?.flowVisibilityConfig as FlowVisibilityConfig;
 
-                        // 🔧 그룹의 위치는 모든 버튼 중 가장 왼쪽/위쪽 버튼의 위치 사용
-                        const groupPosition = buttons.reduce(
-                          (min, button) => ({
-                            x: Math.min(min.x, button.position.x),
-                            y: Math.min(min.y, button.position.y),
-                            z: min.z,
-                          }),
-                          { x: buttons[0].position.x, y: buttons[0].position.y, z: buttons[0].position.z || 2 },
-                        );
-
-                        // 🆕 그룹의 크기 계산: 버튼들의 실제 크기 + 간격을 기준으로 계산
+                        // 🔧 그룹의 위치 및 크기 계산
+                        // 모든 버튼이 같은 위치(groupX, groupY)에 배치되어 있으므로
+                        // 첫 번째 버튼의 위치를 그룹 시작점으로 사용
                         const direction = groupConfig.groupDirection || "horizontal";
                         const gap = groupConfig.groupGap ?? 8;
+                        const align = groupConfig.groupAlign || "start";
 
+                        const groupPosition = {
+                          x: buttons[0].position.x,
+                          y: buttons[0].position.y,
+                          z: buttons[0].position.z || 2,
+                        };
+
+                        // 버튼들의 실제 크기 계산
                         let groupWidth = 0;
                         let groupHeight = 0;
 
@@ -4731,12 +4823,10 @@ export default function ScreenDesigner({ selectedScreen, onBackToList }: ScreenD
                             const gapWidth = index < buttons.length - 1 ? gap : 0;
                             return total + buttonWidth + gapWidth;
                           }, 0);
-                          // 세로는 가장 큰 버튼의 높이
                           groupHeight = Math.max(...buttons.map((b) => b.size?.height || 40));
                         } else {
-                          // 세로 정렬: 가로는 가장 큰 버튼의 너비
+                          // 세로 정렬
                           groupWidth = Math.max(...buttons.map((b) => b.size?.width || 100));
-                          // 세로는 모든 버튼의 높이 + 간격
                           groupHeight = buttons.reduce((total, button, index) => {
                             const buttonHeight = button.size?.height || 40;
                             const gapHeight = index < buttons.length - 1 ? gap : 0;
@@ -4744,6 +4834,14 @@ export default function ScreenDesigner({ selectedScreen, onBackToList }: ScreenD
                           }, 0);
                         }
 
+                        // 🆕 그룹 전체가 선택되었는지 확인
+                        const isGroupSelected = buttons.every(
+                          (btn) => selectedComponent?.id === btn.id || groupState.selectedComponents.includes(btn.id),
+                        );
+                        const hasAnySelected = buttons.some(
+                          (btn) => selectedComponent?.id === btn.id || groupState.selectedComponents.includes(btn.id),
+                        );
+
                         return (
                           <div
                             key={`flow-button-group-${groupId}`}
@@ -4754,7 +4852,9 @@ export default function ScreenDesigner({ selectedScreen, onBackToList }: ScreenD
                               zIndex: groupPosition.z,
                               width: `${groupWidth}px`, // 🆕 명시적 너비
                               height: `${groupHeight}px`, // 🆕 명시적 높이
+                              pointerEvents: "none", // 그룹 컨테이너는 이벤트 차단하여 개별 버튼 클릭 가능
                             }}
+                            className={hasAnySelected ? "rounded outline-2 outline-offset-2 outline-blue-500" : ""}
                           >
                             <FlowButtonGroup
                               buttons={buttons}
@@ -4805,10 +4905,62 @@ export default function ScreenDesigner({ selectedScreen, onBackToList }: ScreenD
                                       display: "inline-block",
                                       width: button.size?.width || 100,
                                       height: button.size?.height || 40,
+                                      pointerEvents: "auto", // 개별 버튼은 이벤트 활성화
+                                      cursor: "pointer",
                                     }}
-                                    onClick={(e) => {
+                                    onMouseDown={(e) => {
+                                      // 클릭이 아닌 드래그인 경우에만 드래그 시작
+                                      e.preventDefault();
                                       e.stopPropagation();
-                                      handleComponentClick(button, e);
+
+                                      const startX = e.clientX;
+                                      const startY = e.clientY;
+                                      let isDragging = false;
+                                      let dragStarted = false;
+
+                                      const handleMouseMove = (moveEvent: MouseEvent) => {
+                                        const deltaX = Math.abs(moveEvent.clientX - startX);
+                                        const deltaY = Math.abs(moveEvent.clientY - startY);
+
+                                        // 5픽셀 이상 움직이면 드래그로 간주
+                                        if ((deltaX > 5 || deltaY > 5) && !dragStarted) {
+                                          isDragging = true;
+                                          dragStarted = true;
+
+                                          // Shift 키를 누르지 않았으면 같은 그룹의 버튼들도 모두 선택
+                                          if (!e.shiftKey) {
+                                            const buttonIds = buttons.map((b) => b.id);
+                                            setGroupState((prev) => ({
+                                              ...prev,
+                                              selectedComponents: buttonIds,
+                                            }));
+                                          }
+
+                                          // 드래그 시작
+                                          startComponentDrag(button, e as any);
+                                        }
+                                      };
+
+                                      const handleMouseUp = () => {
+                                        document.removeEventListener("mousemove", handleMouseMove);
+                                        document.removeEventListener("mouseup", handleMouseUp);
+
+                                        // 드래그가 아니면 클릭으로 처리
+                                        if (!isDragging) {
+                                          // Shift 키를 누르지 않았으면 같은 그룹의 버튼들도 모두 선택
+                                          if (!e.shiftKey) {
+                                            const buttonIds = buttons.map((b) => b.id);
+                                            setGroupState((prev) => ({
+                                              ...prev,
+                                              selectedComponents: buttonIds,
+                                            }));
+                                          }
+                                          handleComponentClick(button, e);
+                                        }
+                                      };
+
+                                      document.addEventListener("mousemove", handleMouseMove);
+                                      document.addEventListener("mouseup", handleMouseUp);
                                     }}
                                     onDoubleClick={(e) => {
                                       e.stopPropagation();
@@ -4817,12 +4969,12 @@ export default function ScreenDesigner({ selectedScreen, onBackToList }: ScreenD
                                     className={
                                       selectedComponent?.id === button.id ||
                                       groupState.selectedComponents.includes(button.id)
-                                        ? "outline outline-2 outline-offset-2 outline-blue-500"
+                                        ? "outline-1 outline-offset-1 outline-blue-400"
                                         : ""
                                     }
                                   >
                                     {/* 그룹 내부에서는 DynamicComponentRenderer로 직접 렌더링 */}
-                                    <div style={{ width: "100%", height: "100%" }}>
+                                    <div style={{ width: "100%", height: "100%", pointerEvents: "none" }}>
                                       <DynamicComponentRenderer
                                         component={relativeButton}
                                         isDesignMode={true}

frontend/components/screen/widgets/FlowWidget.tsx

@@ -195,6 +195,32 @@ export function FlowWidget({
               setStepCounts(countsMap);
             }
           }
+
+          // 🆕 플로우 로드 후 첫 번째 스텝 자동 선택
+          if (sortedSteps.length > 0) {
+            const firstStep = sortedSteps[0];
+            setSelectedStepId(firstStep.id);
+            setSelectedStep(flowComponentId, firstStep.id);
+            console.log("✅ [FlowWidget] 첫 번째 단계 자동 선택:", {
+              flowComponentId,
+              stepId: firstStep.id,
+              stepName: firstStep.stepName,
+            });
+
+            // 첫 번째 스텝의 데이터 로드
+            try {
+              const response = await getStepDataList(flowId!, firstStep.id, 1, 100);
+              if (response.success) {
+                const rows = response.data?.records || [];
+                setStepData(rows);
+                if (rows.length > 0) {
+                  setStepDataColumns(Object.keys(rows[0]));
+                }
+              }
+            } catch (err) {
+              console.error("첫 번째 스텝 데이터 로드 실패:", err);
+            }
+          }
         }
       } catch (err: any) {
         console.error("Failed to load flow data:", err);
@@ -732,12 +758,12 @@ export function FlowWidget({
               </div>
 
               {/* 데스크톱: 테이블 뷰 - 고정 높이 + 스크롤 */}
-              <div className="hidden overflow-auto @sm:block" style={{ height: "450px" }}>
-                <Table>
+              <div className="relative hidden overflow-auto @sm:block" style={{ height: "450px" }}>
+                <Table noWrapper>
                   <TableHeader>
-                    <TableRow className="bg-muted/50 hover:bg-muted/50">
+                    <TableRow className="hover:bg-muted/50">
                       {allowDataMove && (
-                        <TableHead className="bg-muted/50 sticky top-0 left-0 z-20 w-12 border-b px-3 py-2 text-center shadow-sm">
+                        <TableHead className="bg-background sticky top-0 left-0 z-20 w-12 border-b px-3 py-2 text-center shadow-[0_1px_0_0_rgb(0,0,0,0.1)]">
                           <Checkbox
                             checked={selectedRows.size === stepData.length && stepData.length > 0}
                             onCheckedChange={toggleAllRows}
@@ -747,7 +773,7 @@ export function FlowWidget({
                       {stepDataColumns.map((col) => (
                         <TableHead
                           key={col}
-                          className="bg-muted/50 sticky top-0 z-10 border-b px-3 py-2 text-xs font-semibold whitespace-nowrap sm:text-sm"
+                          className="bg-background sticky top-0 z-10 border-b px-3 py-2 text-xs font-semibold whitespace-nowrap shadow-[0_1px_0_0_rgb(0,0,0,0.1)] sm:text-sm"
                         >
                           {col}
                         </TableHead>