From 980c929d83237f11c4c01b2c0e25df68d6d19470 Mon Sep 17 00:00:00 2001
From: kjs <kjs@wace.me>
Date: Thu, 8 Jan 2026 12:28:48 +0900
Subject: [PATCH] =?UTF-8?q?=EB=A6=AC=EB=8F=84,=EC=96=B8=EB=8F=84=EA=B8=B0?=
 =?UTF-8?q?=EB=8A=A5?=
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---
 .../components/common/EditableSpreadsheet.tsx | 95 ++++++++++++++++++-
 1 file changed, 93 insertions(+), 2 deletions(-)

diff --git a/frontend/components/common/EditableSpreadsheet.tsx b/frontend/components/common/EditableSpreadsheet.tsx
index 0d4ad3d3..17c8ce94 100644
--- a/frontend/components/common/EditableSpreadsheet.tsx
+++ b/frontend/components/common/EditableSpreadsheet.tsx
@@ -55,8 +55,91 @@ export const EditableSpreadsheet: React.FC<EditableSpreadsheetProps> = ({
   // 복사된 범위 (점선 애니메이션 표시용)
   const [copiedRange, setCopiedRange] = useState<CellRange | null>(null);
   
+  // Undo/Redo 히스토리
+  interface HistoryState {
+    columns: string[];
+    data: Record<string, any>[];
+  }
+  const [history, setHistory] = useState<HistoryState[]>([]);
+  const [historyIndex, setHistoryIndex] = useState(-1);
+  const [isUndoRedo, setIsUndoRedo] = useState(false);
+  
   const inputRef = useRef<HTMLInputElement>(null);
   const tableRef = useRef<HTMLDivElement>(null);
+  
+  // 히스토리에 현재 상태 저장
+  const saveToHistory = useCallback(() => {
+    if (isUndoRedo) return;
+    
+    const newState: HistoryState = {
+      columns: [...columns],
+      data: data.map(row => ({ ...row })),
+    };
+    
+    setHistory(prev => {
+      // 현재 인덱스 이후의 히스토리는 삭제 (새로운 분기)
+      const newHistory = prev.slice(0, historyIndex + 1);
+      newHistory.push(newState);
+      // 최대 50개까지만 유지
+      if (newHistory.length > 50) {
+        newHistory.shift();
+        return newHistory;
+      }
+      return newHistory;
+    });
+    setHistoryIndex(prev => Math.min(prev + 1, 49));
+  }, [columns, data, historyIndex, isUndoRedo]);
+  
+  // 초기 상태 저장
+  useEffect(() => {
+    if (history.length === 0 && (columns.length > 0 || data.length > 0)) {
+      setHistory([{ columns: [...columns], data: data.map(row => ({ ...row })) }]);
+      setHistoryIndex(0);
+    }
+  }, []);
+  
+  // 데이터 변경 시 히스토리 저장 (Undo/Redo가 아닌 경우)
+  useEffect(() => {
+    if (!isUndoRedo && historyIndex >= 0) {
+      const currentState = history[historyIndex];
+      if (currentState) {
+        const columnsChanged = JSON.stringify(columns) !== JSON.stringify(currentState.columns);
+        const dataChanged = JSON.stringify(data) !== JSON.stringify(currentState.data);
+        if (columnsChanged || dataChanged) {
+          saveToHistory();
+        }
+      }
+    }
+    setIsUndoRedo(false);
+  }, [columns, data]);
+  
+  // Undo 실행
+  const handleUndo = useCallback(() => {
+    if (historyIndex <= 0) return;
+    
+    const prevIndex = historyIndex - 1;
+    const prevState = history[prevIndex];
+    if (prevState) {
+      setIsUndoRedo(true);
+      setHistoryIndex(prevIndex);
+      onColumnsChange([...prevState.columns]);
+      onDataChange(prevState.data.map(row => ({ ...row })));
+    }
+  }, [history, historyIndex, onColumnsChange, onDataChange]);
+  
+  // Redo 실행
+  const handleRedo = useCallback(() => {
+    if (historyIndex >= history.length - 1) return;
+    
+    const nextIndex = historyIndex + 1;
+    const nextState = history[nextIndex];
+    if (nextState) {
+      setIsUndoRedo(true);
+      setHistoryIndex(nextIndex);
+      onColumnsChange([...nextState.columns]);
+      onDataChange(nextState.data.map(row => ({ ...row })));
+    }
+  }, [history, historyIndex, onColumnsChange, onDataChange]);
 
   // 범위 정규화 (시작이 끝보다 크면 교환)
   const normalizeRange = (range: CellRange): CellRange => {
@@ -518,7 +601,15 @@ export const EditableSpreadsheet: React.FC<EditableSpreadsheetProps> = ({
         return;
       }
 
-      if ((e.ctrlKey || e.metaKey) && e.key === "c") {
+      if ((e.ctrlKey || e.metaKey) && e.key === "z") {
+        // Ctrl+Z: Undo
+        e.preventDefault();
+        handleUndo();
+      } else if ((e.ctrlKey || e.metaKey) && e.key === "y") {
+        // Ctrl+Y: Redo
+        e.preventDefault();
+        handleRedo();
+      } else if ((e.ctrlKey || e.metaKey) && e.key === "c") {
         e.preventDefault();
         handleCopy();
       } else if ((e.ctrlKey || e.metaKey) && e.key === "v") {
@@ -555,7 +646,7 @@ export const EditableSpreadsheet: React.FC<EditableSpreadsheetProps> = ({
 
     document.addEventListener("keydown", handleGlobalKeyDown);
     return () => document.removeEventListener("keydown", handleGlobalKeyDown);
-  }, [editingCell, selection, handleCopy, handlePaste, handleDelete]);
+  }, [editingCell, selection, handleCopy, handlePaste, handleDelete, handleUndo, handleRedo]);
 
   // 행 삭제
   const handleDeleteRow = (rowIndex: number) => {