feat: ESLint 정리 및 전체 코드 품질 개선

- eslint.config.mjs 규칙 강화 및 정리
- 전역 unused import/변수 제거 (312개 파일)
- next.config.ts, middleware, proxy route 개선
- CopyableCell molecule 추가
- 회계/결재/HR/생산/건설/품질/영업 등 전 도메인 lint 정리
- IntegratedListTemplateV2, DataTable, MobileCard 등 공통 컴포넌트 개선
- execute-server-action 에러 핸들링 보강

src/components/board/BoardDetail/index.tsx

@@ -33,7 +33,6 @@ import { useDeleteDialog } from '@/hooks/useDeleteDialog';
 import { CommentSection } from '../CommentSection';
 import { deletePost } from '../actions';
 import type { Post, Comment } from '../types';
-import { isNextRedirectError } from '@/lib/utils/redirect-error';
 import { useMenuStore } from '@/stores/menuStore';
 import { sanitizeHTML } from '@/lib/sanitize';
 

src/components/board/BoardForm/index.tsx

@@ -13,13 +13,11 @@
 import { useState, useCallback, useEffect } from 'react';
 import { useRouter } from 'next/navigation';
 import { format } from 'date-fns';
-import { Loader2 } from 'lucide-react';
 import { toast } from 'sonner';
 import { FileDropzone } from '@/components/ui/file-dropzone';
 import { FileList, type NewFile, type ExistingFile } from '@/components/ui/file-list';
 import { IntegratedDetailTemplate } from '@/components/templates/IntegratedDetailTemplate';
 import { boardCreateConfig, boardEditConfig } from './boardFormConfig';
-import { Button } from '@/components/ui/button';
 import { Input } from '@/components/ui/input';
 import { Label } from '@/components/ui/label';
 import { RadioGroup, RadioGroupItem } from '@/components/ui/radio-group';
@@ -40,7 +38,6 @@ import {
 import {
   AlertDialog,
   AlertDialogAction,
-  AlertDialogCancel,
   AlertDialogContent,
   AlertDialogDescription,
   AlertDialogFooter,
@@ -50,7 +47,7 @@ import {
 import dynamic from 'next/dynamic';
 
 const RichTextEditor = dynamic(() => import('../RichTextEditor'), { ssr: false });
-import type { Post, Attachment } from '../types';
+import type { Post } from '../types';
 import { createPost, updatePost } from '../actions';
 import { getBoards } from '../BoardManagement/actions';
 import type { Board } from '../BoardManagement/types';
@@ -107,7 +104,7 @@ export function BoardForm({ mode, initialData }: BoardFormProps) {
   // 게시판 목록 상태
   const [boards, setBoards] = useState<Board[]>([]);
   const [isBoardsLoading, setIsBoardsLoading] = useState(true);
-  const [isSubmitting, setIsSubmitting] = useState(false);
+  const [, setIsSubmitting] = useState(false);
 
   // ===== 게시판 목록 조회 =====
   useEffect(() => {

src/components/board/BoardList/BoardListUnified.tsx

@@ -29,7 +29,6 @@ import type { Post } from '../types';
 import { getBoards } from '../BoardManagement/actions';
 import { getPosts, getMyPosts, deletePost } from '../actions';
 import type { Board } from '../BoardManagement/types';
-import { toast } from 'sonner';
 import { DeleteConfirmDialog } from '@/components/ui/confirm-dialog';
 
 export function BoardListUnified() {
@@ -133,7 +132,7 @@ export function BoardListUnified() {
           totalCount: 0,
         };
       },
-      deleteItem: async (id: string) => {
+      deleteItem: async (_id: string) => {
         // 게시글 삭제는 boardCode가 필요하므로 별도 처리
         // UniversalListPage에서는 사용하지 않고 커스텀 삭제 처리
         return { success: false, error: 'Use custom delete handler' };
@@ -143,10 +142,10 @@ export function BoardListUnified() {
     // ===== 테이블 컬럼 =====
     columns: [
       { key: 'no', label: 'No.', className: 'w-[60px] text-center' },
-      { key: 'title', label: '제목', className: 'min-w-[300px]' },
-      { key: 'author', label: '작성자', className: 'w-[120px]' },
-      { key: 'createdAt', label: '등록일', className: 'w-[120px]' },
-      { key: 'viewCount', label: '조회수', className: 'w-[80px] text-center' },
+      { key: 'title', label: '제목', className: 'min-w-[300px]', copyable: true },
+      { key: 'author', label: '작성자', className: 'w-[120px]', copyable: true },
+      { key: 'createdAt', label: '등록일', className: 'w-[120px]', copyable: true },
+      { key: 'viewCount', label: '조회수', className: 'w-[80px] text-center', copyable: true },
       { key: 'actions', label: '작업', className: 'w-[100px] text-center' },
     ],
 
@@ -161,7 +160,7 @@ export function BoardListUnified() {
     detailMode: 'none', // 커스텀 라우팅 사용 (boardCode 포함)
 
     // ===== 헤더 액션 =====
-    headerActions: ({ onCreate }) => (
+    headerActions: ({ onCreate: _onCreate }) => (
       <>
         <DateRangeSelector
           startDate={startDate}

src/components/board/BoardList/index.tsx

@@ -132,7 +132,7 @@ export function BoardList() {
   }, []);
 
   // ===== 액션 핸들러 =====
-  const handleRowClick = useCallback(
+  const _handleRowClick = useCallback(
     (item: Post) => {
       router.push(`/ko/board/${item.boardCode}/${item.id}?mode=view`);
     },
@@ -224,10 +224,10 @@ export function BoardList() {
 
       columns: [
         { key: 'no', label: 'No.', className: 'w-[60px] text-center' },
-        { key: 'title', label: '제목', className: 'min-w-[300px]', sortable: true },
-        { key: 'author', label: '작성자', className: 'w-[120px]', sortable: true },
-        { key: 'createdAt', label: '등록일', className: 'w-[120px]', sortable: true },
-        { key: 'viewCount', label: '조회수', className: 'w-[80px] text-center', sortable: true },
+        { key: 'title', label: '제목', className: 'min-w-[300px]', sortable: true, copyable: true },
+        { key: 'author', label: '작성자', className: 'w-[120px]', sortable: true, copyable: true },
+        { key: 'createdAt', label: '등록일', className: 'w-[120px]', sortable: true, copyable: true },
+        { key: 'viewCount', label: '조회수', className: 'w-[80px] text-center', sortable: true, copyable: true },
         { key: 'actions', label: '작업', className: 'w-[100px] text-center' },
       ],
 

src/components/board/BoardManagement/BoardDetailClientV2.tsx

@@ -7,7 +7,7 @@
  * 기존 BoardDetail, BoardForm 컴포넌트 활용
  */
 
-import { useState, useEffect, useCallback } from 'react';
+import { useState, useEffect } from 'react';
 import { useRouter, useSearchParams } from 'next/navigation';
 import { Loader2 } from 'lucide-react';
 import { BoardDetail } from './BoardDetail';
@@ -17,7 +17,6 @@ import { forceRefreshMenus } from '@/lib/utils/menuRefresh';
 import type { Board, BoardFormData } from './types';
 import { DetailPageSkeleton } from '@/components/ui/skeleton';
 import { ErrorCard } from '@/components/ui/error-card';
-import { Button } from '@/components/ui/button';
 import { DeleteConfirmDialog } from '@/components/ui/confirm-dialog';
 import { useDeleteDialog } from '@/hooks/useDeleteDialog';
 import { toast } from 'sonner';

src/components/board/BoardManagement/BoardForm.tsx

@@ -17,7 +17,7 @@ import {
   SelectValue,
 } from '@/components/ui/select';
 import { Checkbox } from '@/components/ui/checkbox';
-import { ClipboardList, ArrowLeft, Save, X } from 'lucide-react';
+import { ClipboardList, Save, X } from 'lucide-react';
 import { useMenuStore } from '@/stores/menuStore';
 import type { Board, BoardFormData, BoardTarget, BoardStatus } from './types';
 import { BOARD_TARGETS, BOARD_STATUS_LABELS } from './types';

src/components/board/BoardManagement/index.tsx

@@ -39,7 +39,7 @@ const getTargetDisplay = (board: Board) => {
 };
 
 // 탭 옵션 계산
-const computeTabs = (data: Board[]): TabOption[] => {
+const _computeTabs = (data: Board[]): TabOption[] => {
   const activeCount = data.filter((b) => b.status === 'active').length;
   const inactiveCount = data.filter((b) => b.status === 'inactive').length;
 
@@ -82,11 +82,11 @@ const createBoardManagementConfig = (router: ReturnType<typeof useRouter>): Univ
   // 테이블 컬럼
   columns: [
     { key: 'rowNumber', label: 'No.', className: 'w-[60px] text-center' },
-    { key: 'target', label: '대상', className: 'min-w-[100px]' },
-    { key: 'boardName', label: '게시판명', className: 'min-w-[150px]' },
+    { key: 'target', label: '대상', className: 'min-w-[100px]', copyable: true },
+    { key: 'boardName', label: '게시판명', className: 'min-w-[150px]', copyable: true },
     { key: 'status', label: '상태', className: 'min-w-[80px]' },
-    { key: 'authorName', label: '작성자', className: 'min-w-[100px]' },
-    { key: 'createdAt', label: '등록일시', className: 'min-w-[120px]' },
+    { key: 'authorName', label: '작성자', className: 'min-w-[100px]', copyable: true },
+    { key: 'createdAt', label: '등록일시', className: 'min-w-[120px]', copyable: true },
   ],
 
   // 탭 설정 (클라이언트 사이드 계산)
@@ -135,7 +135,7 @@ const createBoardManagementConfig = (router: ReturnType<typeof useRouter>): Univ
 
   // 테이블 행 렌더링
   renderTableRow: (item, index, globalIndex, handlers) => {
-    const { isSelected, onToggle, onRowClick, onEdit, onDelete } = handlers;
+    const { isSelected, onToggle, onRowClick, onEdit: _onEdit, onDelete: _onDelete } = handlers;
 
     return (
       <TableRow
@@ -164,7 +164,7 @@ const createBoardManagementConfig = (router: ReturnType<typeof useRouter>): Univ
 
   // 모바일 카드 렌더링
   renderMobileCard: (item, index, globalIndex, handlers) => {
-    const { isSelected, onToggle, onRowClick, onEdit, onDelete } = handlers;
+    const { isSelected, onToggle, onRowClick, onEdit: _onEdit, onDelete: _onDelete } = handlers;
 
     return (
       <ListMobileCard

src/components/board/CommentSection/index.tsx

@@ -25,7 +25,7 @@ interface CommentSectionProps {
 }
 
 export function CommentSection({
-  postId,
+  postId: _postId,
   comments,
   currentUserId,
   onAddComment,