에디터 UX: Undo/Redo 및 키보드 선택 이동 추가

src/app/editor/page.tsx

@@ -1,7 +1,7 @@
 "use client";
 
 import type { CSSProperties, ReactNode } from "react";
-import { useState } from "react";
+import { useEffect, useState } from "react";
 import {
   DndContext,
   PointerSensor,
@@ -41,6 +41,8 @@ export default function EditorPage() {
   const replaceBlocks = useEditorStore((state) => state.replaceBlocks);
   const reorderBlocks = useEditorStore((state) => state.reorderBlocks);
   const moveBlock = useEditorStore((state) => state.moveBlock);
+  const undo = useEditorStore((state) => state.undo);
+  const redo = useEditorStore((state) => state.redo);
 
   const [editingBlockId, setEditingBlockId] = useState<string | null>(null);
   const [editingText, setEditingText] = useState("");
@@ -197,6 +199,65 @@ export default function EditorPage() {
 
   const rootBlocks = blocks.filter((block) => !block.sectionId);
 
+  // 에디터 전역에서 Undo/Redo 단축키(Cmd/Ctrl+Z, Cmd/Ctrl+Shift+Z)와
+  // ArrowUp/ArrowDown을 이용한 선택 블록 이동을 처리한다.
+  useEffect(() => {
+    const handleKeyDown = (event: KeyboardEvent) => {
+      // 방향키로 선택된 블록을 위/아래로 이동 (순서 변경이 아니라 선택만 이동)
+      if (event.key === "ArrowDown" || event.key === "ArrowUp") {
+        const { blocks: currentBlocks, selectedBlockId: currentSelectedId, selectBlock: storeSelectBlock } =
+          (useEditorStore as any).getState();
+
+        if (!currentBlocks.length) return;
+
+        const currentIndex = currentSelectedId
+          ? currentBlocks.findIndex((b: Block) => b.id === currentSelectedId)
+          : -1;
+
+        let nextIndex = currentIndex;
+
+        if (event.key === "ArrowDown") {
+          nextIndex = currentIndex < currentBlocks.length - 1 ? currentIndex + 1 : currentIndex;
+        } else if (event.key === "ArrowUp") {
+          nextIndex = currentIndex > 0 ? currentIndex - 1 : currentIndex;
+        }
+
+        if (nextIndex !== -1 && nextIndex !== currentIndex) {
+          event.preventDefault();
+          const nextId = currentBlocks[nextIndex]?.id;
+          if (nextId) {
+            storeSelectBlock(nextId);
+          }
+        }
+
+        return;
+      }
+
+      const isMac = navigator.platform.toLowerCase().includes("mac");
+      const metaKey = isMac ? event.metaKey : event.ctrlKey;
+
+      if (!metaKey) return;
+
+      // Cmd/Ctrl + Shift + Z → Redo
+      if (event.key.toLowerCase() === "z" && event.shiftKey) {
+        event.preventDefault();
+        redo();
+        return;
+      }
+
+      // Cmd/Ctrl + Z → Undo
+      if (event.key.toLowerCase() === "z") {
+        event.preventDefault();
+        undo();
+      }
+    };
+
+    window.addEventListener("keydown", handleKeyDown);
+    return () => {
+      window.removeEventListener("keydown", handleKeyDown);
+    };
+  }, [undo, redo]);
+
   const renderBlocks = (targetBlocks: Block[]) =>
     targetBlocks.map((block) => {
       const isSelected = block.id === selectedBlockId;

src/features/editor/state/editorStore.ts

@@ -51,6 +51,8 @@ export interface Block {
 export interface EditorState {
   blocks: Block[];
   selectedBlockId: string | null;
+  history: Block[][];
+  future: Block[][];
   addTextBlock: () => void;
   addButtonBlock: () => void;
   addImageBlock: () => void;
@@ -63,6 +65,8 @@ export interface EditorState {
   replaceBlocks: (blocks: Block[]) => void;
   reorderBlocks: (activeId: string, overId: string) => void;
   moveBlock: (id: string, sectionId: string | null, columnId: string | null) => void;
+  undo: () => void;
+  redo: () => void;
 }
 
 // 간단한 ID 생성기 (추후 uuid 라이브러리로 교체 가능)
@@ -74,6 +78,8 @@ const createId = () => `blk_${Date.now()}_${idCounter++}`;
 const createEditorState = (set: any, get: any): EditorState => ({
     blocks: [],
     selectedBlockId: null,
+    history: [],
+    future: [],
 
     // 텍스트 블록 추가: 기본 텍스트와 함께 생성 후 선택 상태로 만든다
     addTextBlock: () => {
@@ -112,6 +118,8 @@ const createEditorState = (set: any, get: any): EditorState => ({
       set((state: EditorState) => ({
         blocks: [...state.blocks, newBlock],
         selectedBlockId: id,
+        history: [...state.history, blocks],
+        future: [],
       }));
     },
 
@@ -478,6 +486,34 @@ const createEditorState = (set: any, get: any): EditorState => ({
         ),
       }));
     },
+    undo: () => {
+      const { history, blocks } = get();
+      if (history.length === 0) return;
+
+      const previous = history[history.length - 1];
+      const nextHistory = history.slice(0, -1);
+
+      set((state: EditorState) => ({
+        blocks: previous,
+        selectedBlockId: previous.length > 0 ? previous[previous.length - 1].id : null,
+        history: nextHistory,
+        future: [...state.future, blocks],
+      }));
+    },
+    redo: () => {
+      const { future, blocks } = get();
+      if (future.length === 0) return;
+
+      const next = future[future.length - 1];
+      const nextFuture = future.slice(0, -1);
+
+      set((state: EditorState) => ({
+        blocks: next,
+        selectedBlockId: next.length > 0 ? next[next.length - 1].id : null,
+        history: [...state.history, blocks],
+        future: nextFuture,
+      }));
+    },
   });
 
 // React 컴포넌트에서 사용하는 전역 훅 스토어