fix: 품목기준관리 타입 에러 및 무한 로딩 버그 수정

- 55개 타입 에러 수정 (MasterOption/UnitOption 타입 통일)
- 다이얼로그 컴포넌트 import 누락 수정 (15개)
- useInitialDataLoading 무한 로딩 버그 수정 (useRef 적용)
- 미사용 변수 _ prefix 처리
- 미사용 ItemMasterDialogs export 제거

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/components/items/ItemMasterDataManagement.tsx

@@ -18,6 +18,23 @@ import { Button } from '@/components/ui/button';
 import { Card, CardContent, CardDescription, CardHeader, CardTitle } from '@/components/ui/card';
 import { Tabs, TabsContent, TabsList, TabsTrigger } from '@/components/ui/tabs';
 
+// 다이얼로그 컴포넌트 import
+import { TabManagementDialogs } from './ItemMasterDataManagement/dialogs/TabManagementDialogs';
+import { OptionDialog } from './ItemMasterDataManagement/dialogs/OptionDialog';
+import { ColumnManageDialog } from './ItemMasterDataManagement/dialogs/ColumnManageDialog';
+import { PathEditDialog } from './ItemMasterDataManagement/dialogs/PathEditDialog';
+import { PageDialog } from './ItemMasterDataManagement/dialogs/PageDialog';
+import { SectionDialog } from './ItemMasterDataManagement/dialogs/SectionDialog';
+import { FieldDialog } from './ItemMasterDataManagement/dialogs/FieldDialog';
+import { FieldDrawer } from './ItemMasterDataManagement/dialogs/FieldDrawer';
+import { ColumnDialog } from './ItemMasterDataManagement/dialogs/ColumnDialog';
+import { MasterFieldDialog } from './ItemMasterDataManagement/dialogs/MasterFieldDialog';
+import { SectionTemplateDialog } from './ItemMasterDataManagement/dialogs/SectionTemplateDialog';
+import { TemplateFieldDialog } from './ItemMasterDataManagement/dialogs/TemplateFieldDialog';
+import { LoadTemplateDialog } from './ItemMasterDataManagement/dialogs/LoadTemplateDialog';
+import { ImportSectionDialog } from './ItemMasterDataManagement/dialogs/ImportSectionDialog';
+import { ImportFieldDialog } from './ItemMasterDataManagement/dialogs/ImportFieldDialog';
+
 // 커스텀 훅 import
 import {
   usePageManagement,
@@ -54,30 +71,30 @@ const INPUT_TYPE_OPTIONS = [
 export function ItemMasterDataManagement() {
   const {
     itemPages,
-    loadItemPages,
+    loadItemPages: _loadItemPages,
     updateItemPage,
-    deleteItemPage,
+    deleteItemPage: _deleteItemPage,
     updateSection,
-    deleteSection,
-    reorderFields,
+    deleteSection: _deleteSection,
+    reorderFields: _reorderFields,
     itemMasterFields,
-    loadItemMasterFields,
+    loadItemMasterFields: _loadItemMasterFields,
     sectionTemplates,
-    loadSectionTemplates,
-    resetAllData,
+    loadSectionTemplates: _loadSectionTemplates,
+    resetAllData: _resetAllData,
     // 2025-11-26 추가: 독립 엔티티 관리
     independentSections,
-    loadIndependentSections,
-    loadIndependentFields,
+    loadIndependentSections: _loadIndependentSections,
+    loadIndependentFields: _loadIndependentFields,
     refreshIndependentSections,
     refreshIndependentFields,
-    linkSectionToPage,
-    linkFieldToSection,
-    unlinkFieldFromSection,
+    linkSectionToPage: _linkSectionToPage,
+    linkFieldToSection: _linkFieldToSection,
+    unlinkFieldFromSection: _unlinkFieldFromSection,
     getSectionUsage,
     getFieldUsage,
-    cloneSection,
-    reorderSections,
+    cloneSection: _cloneSection,
+    reorderSections: _reorderSections,
     // 2025-11-27 추가: BOM 항목 API 함수
     addBOMItem,
     updateBOMItem,
@@ -368,10 +385,10 @@ export function ItemMasterDataManagement() {
 
   // 2025-12-24: 신규 훅에서 가져온 핸들러 래퍼
   const handleImportSection = async () => handleImportSectionFromHook(selectedPageId);
-  const handleImportField = async () => handleImportFieldFromHook(selectedPage);
-  const moveSection = async (dragIndex: number, hoverIndex: number) => moveSectionFromHook(selectedPage, dragIndex, hoverIndex);
-  const moveField = async (sectionId: number, dragFieldId: number, hoverFieldId: number) => moveFieldFromHook(selectedPage, sectionId, dragFieldId, hoverFieldId);
-  const handleResetAllData = () => handleResetAllDataFromHook(
+  const handleImportField = async () => handleImportFieldFromHook(selectedPage ?? null);
+  const moveSection = async (dragIndex: number, hoverIndex: number) => moveSectionFromHook(selectedPage ?? null, dragIndex, hoverIndex);
+  const moveField = async (sectionId: number, dragFieldId: number, hoverFieldId: number) => moveFieldFromHook(selectedPage ?? null, sectionId, dragFieldId, hoverFieldId);
+  const _handleResetAllData = () => handleResetAllDataFromHook(
     setUnitOptions,
     setMaterialOptions,
     setSurfaceTreatmentOptions,