fix: TypeScript 타입 오류 수정 및 설정 페이지 추가

- BOMItem Omit 타입 시그니처 통일 (useTemplateManagement, SectionsTab, ItemMasterContext)
- HeadersInit → Record<string, string> 타입 변경
- Zustand useShallow 마이그레이션 (zustand/react/shallow)
- DataTable, ListPageTemplate 제네릭 타입 제약 추가
- 설정 관리 페이지 추가 (직급, 직책, 휴가정책, 근무일정, 권한)
- HR 관리 페이지 추가 (급여, 휴가)
- 단가관리 페이지 리팩토링

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

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

src/stores/masterDataStore.ts

@@ -10,7 +10,7 @@
 
 import { create } from 'zustand';
 import { devtools } from 'zustand/middleware';
-import { shallow } from 'zustand/shallow';
+import { useShallow } from 'zustand/react/shallow';
 import type { PageConfig, PageType, DynamicFormData } from '@/types/master-data';
 import { fetchPageConfigByType, invalidatePageConfigCache } from '@/lib/api/master-data';
 
@@ -63,12 +63,20 @@ interface MasterDataStore {
 
 // ===== 초기 상태 =====
 
+const createEmptyPageConfigs = (): Record<PageType, PageConfig | null> => ({
+  'item-master': null,
+  'quotation': null,
+  'sales-order': null,
+  'formula': null,
+  'pricing': null,
+});
+
 const initialState = {
-  pageConfigs: {} as Record<PageType, PageConfig | null>,
+  pageConfigs: createEmptyPageConfigs(),
   loading: {} as Record<PageType, boolean>,
   errors: {} as Record<PageType, string | null>,
-  selectedPageType: null,
-  formData: {},
+  selectedPageType: null as PageType | null,
+  formData: {} as Record<string, DynamicFormData>,
 };
 
 // ===== sessionStorage 유틸리티 =====
@@ -278,7 +286,7 @@ export const useMasterDataStore = create<MasterDataStore>()(
         });
 
         set(
-          { pageConfigs: {} },
+          { pageConfigs: createEmptyPageConfigs() },
           false,
           'invalidateAllConfigs'
         );
@@ -401,7 +409,7 @@ export const useSelectedPageType = () =>
  */
 export const useMasterDataActions = () =>
   useMasterDataStore(
-    (state) => ({
+    useShallow((state) => ({
       fetchPageConfig: state.fetchPageConfig,
       invalidateConfig: state.invalidateConfig,
       invalidateAllConfigs: state.invalidateAllConfigs,
@@ -410,8 +418,7 @@ export const useMasterDataActions = () =>
       getFormData: state.getFormData,
       clearFormData: state.clearFormData,
       reset: state.reset,
-    }),
-    shallow
+    }))
   );
 
 // ===== 타입 추출 =====