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/orders/OrderRegistration.tsx

@@ -22,7 +22,6 @@ import { Button } from "@/components/ui/button";
 import { QuantityInput } from "@/components/ui/quantity-input";
 import { NumberInput } from "@/components/ui/number-input";
 import { PhoneInput } from "@/components/ui/phone-input";
-import { Checkbox } from "@/components/ui/checkbox";
 import { Label } from "@/components/ui/label";
 import { Badge } from "@/components/ui/badge";
 import { getPresetStyle } from "@/lib/utils/status-config";
@@ -187,7 +186,7 @@ export function OrderRegistration({
   });
   const [isQuotationDialogOpen, setIsQuotationDialogOpen] = useState(false);
   const [isItemDialogOpen, setIsItemDialogOpen] = useState(false);
-  const [isSaving, setIsSaving] = useState(false);
+  const [, setIsSaving] = useState(false);
   const [fieldErrors, setFieldErrors] = useState<FieldErrors>({});
 
   // Config 선택

src/components/orders/OrderSalesDetailEdit.tsx

@@ -15,8 +15,6 @@ import { useRouter } from "next/navigation";
 import { Input } from "@/components/ui/input";
 import { DatePicker } from "@/components/ui/date-picker";
 import { Textarea } from "@/components/ui/textarea";
-import { PhoneInput } from "@/components/ui/phone-input";
-import { Checkbox } from "@/components/ui/checkbox";
 import { Label } from "@/components/ui/label";
 import { Card, CardContent, CardHeader, CardTitle } from "@/components/ui/card";
 import {
@@ -39,7 +37,7 @@ import { toast } from "sonner";
 import { IntegratedDetailTemplate } from "@/components/templates/IntegratedDetailTemplate";
 import { orderSalesConfig } from "./orderSalesConfig";
 import { BadgeSm } from "@/components/atoms/BadgeSm";
-import { formatAmount, formatNumber } from "@/lib/utils/amount";
+import { formatNumber } from "@/lib/utils/amount";
 import {
   OrderItem,
   getOrderById,
@@ -91,7 +89,7 @@ interface EditFormData {
 }
 
 // 옵션 타입 정의
-interface SelectOption {
+interface _SelectOption {
   value: string;
   label: string;
 }
@@ -129,7 +127,7 @@ export function OrderSalesDetailEdit({ orderId }: OrderSalesDetailEditProps) {
 
   const [form, setForm] = useState<EditFormData | null>(null);
   const [loading, setLoading] = useState(true);
-  const [isSaving, setIsSaving] = useState(false);
+  const [, _setIsSaving] = useState(false);
   const [expandedProducts, setExpandedProducts] = useState<Set<string>>(new Set());
 
   // 공통코드 옵션 (useCommonCodes 훅)
@@ -261,7 +259,7 @@ export function OrderSalesDetailEdit({ orderId }: OrderSalesDetailEditProps) {
   }, [orderId, router]);
 
 
-  const handleCancel = () => {
+  const _handleCancel = () => {
     // V2 패턴: ?mode=view로 이동
     router.push(`/sales/order-management-sales/${orderId}?mode=view`);
   };

src/components/orders/OrderSalesDetailView.tsx

@@ -23,7 +23,6 @@ import {
   TableRow,
 } from "@/components/ui/table";
 import {
-  FileText,
   Factory,
   XCircle,
   FileSpreadsheet,
@@ -259,11 +258,11 @@ export function OrderSalesDetailView({ orderId }: OrderSalesDetailViewProps) {
     loadOrder();
   }, [orderId]);
 
-  const handleBack = () => {
+  const _handleBack = () => {
     router.push("/sales/order-management-sales");
   };
 
-  const handleEdit = () => {
+  const _handleEdit = () => {
     // V2 패턴: ?mode=edit로 이동
     router.push(`/sales/order-management-sales/${orderId}?mode=edit`);
   };
@@ -273,7 +272,7 @@ export function OrderSalesDetailView({ orderId }: OrderSalesDetailViewProps) {
     router.push(`/sales/order-management-sales/${orderId}/production-order`);
   };
 
-  const handleViewProductionOrder = () => {
+  const _handleViewProductionOrder = () => {
     // 생산지시 목록 페이지로 이동 (수주관리 내부)
     router.push(`/sales/order-management-sales/production-orders`);
   };

src/components/orders/actions.ts

@@ -218,7 +218,7 @@ interface ApiOrderStats {
   confirmed_amount: number;
 }
 
-interface ApiResponse<T> {
+interface _ApiResponse<T> {
   success: boolean;
   message: string;
   data: T;

src/components/orders/documents/ContractDocument.tsx

@@ -61,11 +61,11 @@ export function ContractDocument({
   companyBusinessNumber,
   companyContact,
   companyAddress,
-  items = [],
+  items: _items = [],
   products,
   subtotal = 0,
   discountRate = 0,
-  totalAmount = 0,
+  totalAmount: _totalAmount = 0,
   remarks,
 }: ContractDocumentProps) {
   const discountAmount = Math.round(subtotal * (discountRate / 100));

src/components/orders/documents/SalesOrderDocument.tsx

@@ -111,7 +111,7 @@ export function SalesOrderDocument({
   recipientName = "-",
   recipientContact = "-",
   shutterCount = 0,
-  items = [],
+  items: _items = [],
   products = [],
   remarks,
 }: SalesOrderDocumentProps) {

src/components/orders/documents/TransactionDocument.tsx

@@ -55,20 +55,20 @@ export function TransactionDocument({
   orderNumber,
   orderDate,
   client,
-  clientBusinessNumber = "123-45-67890",
+  clientBusinessNumber: _clientBusinessNumber = "123-45-67890",
   clientCeo = "대표자",
   clientContact = "010-0123-4567",
-  clientAddress = "서울시 강남구",
+  clientAddress: _clientAddress = "서울시 강남구",
   clientSiteName = "-",
   companyName = "(주)케이디산업",
   companyCeo = "홍길동",
   companyBusinessNumber = "123-45-67890",
-  companyContact = "02-1234-5678",
+  companyContact: _companyContact = "02-1234-5678",
   companyAddress = "서울 강남구 테헤란로 123",
   items = [],
   subtotal = 0,
   discountRate = 0,
-  totalAmount = 0,
+  totalAmount: _totalAmount = 0,
 }: TransactionDocumentProps) {
   const discountAmount = Math.round(subtotal * (discountRate / 100));
   const afterDiscount = subtotal - discountAmount;