refactor(WEB): claudedocs 재정리 및 AuthContext/Zustand/유틸 코드 개선

- claudedocs 폴더 구조 재정리: archive/sessions, guides/migration·mobile·universal-list, refactoring 분류
- 오래된 세션 컨텍스트/체크리스트 문서 정리 (아카이브 이동 또는 삭제)
- AuthContext → authStore(Zustand) 전환 시작, RootProvider 간소화
- GenericCRUDDialog 공통 다이얼로그 컴포넌트 추가
- PermissionDialog 삭제 → GenericCRUDDialog로 대체
- RankDialog/TitleDialog GenericCRUDDialog 기반으로 리팩토링
- toast-utils.ts 삭제 (미사용)
- fileDownload.ts 개선, excel-download.ts 정리
- menuStore/themeStore Zustand 셀렉터 최적화
- useColumnSettings/useTableColumnStore 기능 보강
- 세금계산서/견적/작업자화면/결재 등 소규모 개선

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

src/layouts/AuthenticatedLayout.tsx

@@ -1,6 +1,6 @@
 'use client';
 
-import { useMenuStore } from '@/stores/menuStore';
+import { useMenuStore, useMenuItems, useActiveMenu, useSidebarCollapsed, useMenuHydrated } from '@/stores/menuStore';
 import type { SerializableMenuItem } from '@/stores/menuStore';
 import type { MenuItem } from '@/stores/menuStore';
 import { useRouter, usePathname } from 'next/navigation';
@@ -43,8 +43,8 @@ import {
 import Sidebar from '@/components/layout/Sidebar';
 import HeaderFavoritesBar from '@/components/layout/HeaderFavoritesBar';
 import CommandMenuSearch, { type CommandMenuSearchRef } from '@/components/layout/CommandMenuSearch';
-import { useThemeStore } from '@/stores/themeStore';
-import { useAuth } from '@/contexts/AuthContext';
+import { useTheme, useSetTheme } from '@/stores/themeStore';
+import { useAuthStore } from '@/stores/authStore';
 import { deserializeMenuItems } from '@/lib/utils/menuTransform';
 import { stripLocalePrefix } from '@/lib/utils/locale';
 import { safeJsonParse } from '@/lib/utils';
@@ -96,9 +96,16 @@ interface AuthenticatedLayoutProps {
 }
 
 export default function AuthenticatedLayout({ children }: AuthenticatedLayoutProps) {
-  const { menuItems, activeMenu, setActiveMenu, setMenuItems, sidebarCollapsed, toggleSidebar, _hasHydrated } = useMenuStore();
-  const { theme, setTheme } = useThemeStore();
-  const { logout } = useAuth();
+  const menuItems = useMenuItems();
+  const activeMenu = useActiveMenu();
+  const sidebarCollapsed = useSidebarCollapsed();
+  const _hasHydrated = useMenuHydrated();
+  const setActiveMenu = useMenuStore((s) => s.setActiveMenu);
+  const setMenuItems = useMenuStore((s) => s.setMenuItems);
+  const toggleSidebar = useMenuStore((s) => s.toggleSidebar);
+  const theme = useTheme();
+  const setTheme = useSetTheme();
+  const logout = useAuthStore((state) => state.logout);
   const router = useRouter();
   const pathname = usePathname(); // 현재 경로 추적