테이블 컬럼 중복 삽입 안되게 수정

frontend/components/screen/ScreenDesigner.tsx

@@ -356,6 +356,33 @@ export default function ScreenDesigner({ selectedScreen, onBackToList }: ScreenD
     );
   }, [tables, searchTerm]);
 
+  // 이미 배치된 컬럼 목록 계산
+  const placedColumns = useMemo(() => {
+    const placed = new Set<string>();
+
+    const collectColumns = (components: ComponentData[]) => {
+      components.forEach((comp) => {
+        const anyComp = comp as any;
+
+        // widget 타입 또는 component 타입 (새로운 시스템)에서 tableName과 columnName 확인
+        if ((comp.type === "widget" || comp.type === "component") && anyComp.tableName && anyComp.columnName) {
+          const key = `${anyComp.tableName}.${anyComp.columnName}`;
+          placed.add(key);
+          console.log("🔍 배치된 컬럼 발견:", key, "타입:", comp.type);
+        }
+
+        // 자식 컴포넌트도 확인 (재귀)
+        if (comp.children && comp.children.length > 0) {
+          collectColumns(comp.children);
+        }
+      });
+    };
+
+    collectColumns(layout.components);
+    console.log("📋 배치된 컬럼 목록:", Array.from(placed));
+    return placed;
+  }, [layout.components]);
+
   // 히스토리에 저장
   const saveToHistory = useCallback(
     (newLayout: LayoutData) => {
@@ -3926,6 +3953,7 @@ export default function ScreenDesigner({ selectedScreen, onBackToList }: ScreenD
                   e.dataTransfer.setData("application/json", JSON.stringify(dragData));
                 }}
                 selectedTableName={selectedScreen.tableName}
+                placedColumns={placedColumns}
               />
             </div>
           </div>

frontend/components/screen/panels/ComponentsPanel.tsx

@@ -18,6 +18,7 @@ interface ComponentsPanelProps {
   onSearchChange?: (value: string) => void;
   onTableDragStart?: (e: React.DragEvent, table: TableInfo, column?: ColumnInfo) => void;
   selectedTableName?: string;
+  placedColumns?: Set<string>; // 이미 배치된 컬럼명 집합
 }
 
 export function ComponentsPanel({ 
@@ -26,7 +27,8 @@ export function ComponentsPanel({
   searchTerm = "", 
   onSearchChange, 
   onTableDragStart,
-  selectedTableName 
+  selectedTableName,
+  placedColumns 
 }: ComponentsPanelProps) {
   const [searchQuery, setSearchQuery] = useState("");
 
@@ -207,6 +209,7 @@ export function ComponentsPanel({
               onSearchChange={onSearchChange || (() => {})}
               onDragStart={onTableDragStart}
               selectedTableName={selectedTableName}
+              placedColumns={placedColumns}
             />
           ) : (
             <div className="flex h-32 items-center justify-center text-center">

frontend/components/screen/panels/TablesPanel.tsx

@@ -26,6 +26,7 @@ interface TablesPanelProps {
   onSearchChange: (term: string) => void;
   onDragStart: (e: React.DragEvent, table: TableInfo, column?: any) => void;
   selectedTableName?: string;
+  placedColumns?: Set<string>; // 이미 배치된 컬럼명 집합 (tableName.columnName 형식)
 }
 
 // 위젯 타입별 아이콘
@@ -67,6 +68,7 @@ export const TablesPanel: React.FC<TablesPanelProps> = ({
   onSearchChange,
   onDragStart,
   selectedTableName,
+  placedColumns = new Set(),
 }) => {
   const [expandedTables, setExpandedTables] = useState<Set<string>>(new Set());
 
@@ -80,11 +82,26 @@ export const TablesPanel: React.FC<TablesPanelProps> = ({
     setExpandedTables(newExpanded);
   };
 
-  const filteredTables = tables.filter(
-    (table) =>
-      table.tableName.toLowerCase().includes(searchTerm.toLowerCase()) ||
-      table.columns.some((col) => col.columnName.toLowerCase().includes(searchTerm.toLowerCase())),
-  );
+  // 이미 배치된 컬럼을 제외한 테이블 정보 생성
+  const tablesWithAvailableColumns = tables.map((table) => ({
+    ...table,
+    columns: table.columns.filter((col) => {
+      const columnKey = `${table.tableName}.${col.columnName}`;
+      const isPlaced = placedColumns.has(columnKey);
+      if (isPlaced) {
+        console.log("🚫 필터링된 컬럼:", columnKey);
+      }
+      return !isPlaced;
+    }),
+  }));
+
+  const filteredTables = tablesWithAvailableColumns
+    .filter((table) => table.columns.length > 0) // 사용 가능한 컬럼이 있는 테이블만 표시
+    .filter(
+      (table) =>
+        table.tableName.toLowerCase().includes(searchTerm.toLowerCase()) ||
+        table.columns.some((col) => col.columnName.toLowerCase().includes(searchTerm.toLowerCase())),
+    );
 
   return (
     <div className="flex h-full flex-col">