refactor(WEB): 회계/견적/설정/생산 등 전반적 코드 개선 및 공통화 2차

- 회계 모듈 전면 개선: 청구/입금/출금/매입/매출/세금계산서/일반전표/거래처원장 등
- 견적 모듈 금액 포맷/할인/수식/미리보기 등 코드 정리
- 설정 모듈: 계정관리/직급/직책/권한 상세 간소화
- 생산 모듈: 작업지시서/작업자화면/검수 문서 코드 정리
- UniversalListPage 엑셀 다운로드 및 필터 기능 확장
- 대시보드/게시판/수주 등 날짜 유틸 공통화 적용
- claudedocs 문서 인덱스 업데이트

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/components/production/WorkerScreen/InspectionInputModal.tsx

@@ -23,6 +23,7 @@ import { Input } from '@/components/ui/input';
 import { Textarea } from '@/components/ui/textarea';
 import { cn } from '@/lib/utils';
 import type { InspectionTemplateData, InspectionTemplateSectionItem } from './types';
+import { formatNumber } from '@/lib/utils/amount';
 
 // 중간검사 공정 타입
 export type InspectionProcessType =
@@ -278,7 +279,7 @@ function resolveRefValue(
 
 function formatDimension(val: number | undefined): string {
   if (val === undefined || val === null) return '-';
-  return val.toLocaleString();
+  return formatNumber(val);
 }
 
 // ===== 항목별 입력 유형 판별 =====
@@ -337,7 +338,7 @@ function DynamicInspectionForm({
             if (isNumericItem(item)) {
               const numValue = formValues[fieldKey] as number | null | undefined;
 
-              const designLabel = designValue !== undefined ? designValue.toLocaleString() : '';
+              const designLabel = designValue !== undefined ? formatNumber(designValue) : '';
               const toleranceLabel = item.tolerance
                 ? ` (${designLabel ? designLabel + ' ' : ''}${formatToleranceLabel(item.tolerance)})`
                 : designLabel ? ` (${designLabel})` : '';
@@ -381,8 +382,8 @@ function DynamicInspectionForm({
             const hasStandard = designValue !== undefined || item.standard;
             const standardDisplay = designValue !== undefined
               ? (item.tolerance
-                ? `${designValue.toLocaleString()} ${formatToleranceLabel(item.tolerance)}`
-                : String(designValue.toLocaleString()))
+                ? `${formatNumber(designValue)} ${formatToleranceLabel(item.tolerance)}`
+                : String(formatNumber(designValue)))
               : item.standard;
 
             return (

src/components/production/WorkerScreen/MaterialInputModal.tsx

@@ -31,6 +31,7 @@ import { isNextRedirectError } from '@/lib/utils/redirect-error';
 import { getMaterialsForWorkOrder, registerMaterialInput, getMaterialsForItem, registerMaterialInputForItem, type MaterialForInput, type MaterialForItemInput } from './actions';
 import type { WorkOrder } from '../ProductionDashboard/types';
 import type { MaterialInput } from './types';
+import { formatNumber } from '@/lib/utils/amount';
 
 interface MaterialInputModalProps {
   open: boolean;
@@ -55,7 +56,7 @@ interface MaterialGroup {
   lots: MaterialForInput[];
 }
 
-const fmtQty = (v: number) => parseFloat(String(v)).toLocaleString();
+const fmtQty = (v: number) => formatNumber(parseFloat(String(v)));
 
 export function MaterialInputModal({
   open,

src/components/production/WorkerScreen/WorkItemCard.tsx

@@ -32,6 +32,7 @@ import type {
   WorkStepData,
   MaterialListItem,
 } from './types';
+import { formatNumber } from '@/lib/utils/amount';
 
 interface WorkItemCardProps {
   item: WorkItemData;
@@ -91,7 +92,7 @@ export const WorkItemCard = memo(function WorkItemCard({
           <div className="flex items-center gap-1.5 text-sm text-gray-700">
             <span className="text-gray-500">제작 사이즈</span>
             <span className="font-medium">
-              {item.width.toLocaleString()} X {item.height.toLocaleString()} mm
+              {formatNumber(item.width)} X {formatNumber(item.height)} mm
             </span>
             <span className="font-medium text-gray-900">{item.quantity}개</span>
           </div>
@@ -205,7 +206,7 @@ export const WorkItemCard = memo(function WorkItemCard({
                       <TableRow key={mat.id}>
                         <TableCell className="text-center text-xs">{mat.lotNo}</TableCell>
                         <TableCell className="text-center text-xs">{mat.itemName}</TableCell>
-                        <TableCell className="text-center text-xs">{parseFloat(String(mat.quantity)).toLocaleString()}</TableCell>
+                        <TableCell className="text-center text-xs">{formatNumber(parseFloat(String(mat.quantity)))}</TableCell>
                         <TableCell className="text-center text-xs">{mat.unit}</TableCell>
                         <TableCell className="text-center">
                           <div className="flex items-center justify-center gap-1">
@@ -246,7 +247,7 @@ function ScreenCuttingInfo({ width, sheets }: { width: number; sheets: number })
     <div className="p-4 bg-gray-50 rounded-lg border border-gray-100">
       <p className="text-xs text-gray-400 mb-1.5">절단정보</p>
       <p className="text-base font-semibold text-gray-900">
-        폭 {width.toLocaleString()}mm X {sheets}장
+        폭 {formatNumber(width)}mm X {sheets}장
       </p>
     </div>
   );
@@ -265,7 +266,7 @@ function SlatExtraInfo({
   return (
     <div className="flex gap-2">
       <Badge variant="outline" className="text-xs px-2.5 py-1 border-gray-300">
-        길이 {length.toLocaleString()}mm
+        길이 {formatNumber(length)}mm
       </Badge>
       <Badge variant="outline" className="text-xs px-2.5 py-1 border-gray-300">
         슬랫 매수 {slatCount}장
@@ -317,7 +318,7 @@ function BendingExtraInfo({ info }: { info: BendingInfo }) {
               <div key={i} className="flex gap-2 text-xs">
                 <span className="text-gray-500 w-14">{i === 0 ? '길이별 수량' : ''}</span>
                 <span className="text-gray-900 font-medium">
-                  {lq.length.toLocaleString()}mm X {lq.quantity}개
+                  {formatNumber(lq.length)}mm X {lq.quantity}개
                 </span>
               </div>
             ))}