feat(WEB): 테이블 컬럼 표시/숨김 설정 기능 추가

- useColumnSettings 훅: 컬럼 가시성 토글 로직
- useTableColumnStore: Zustand 기반 컬럼 설정 영속화 (localStorage)
- ColumnSettingsPopover: 컬럼 설정 UI 컴포넌트
- UniversalListPage/IntegratedListTemplateV2에 컬럼 설정 통합

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

src/hooks/useColumnSettings.ts

@@ -0,0 +1,64 @@
+import { useMemo, useCallback } from 'react';
+import { useTableColumnStore } from '@/stores/useTableColumnStore';
+import type { TableColumn } from '@/components/templates/UniversalListPage/types';
+
+export interface ColumnWithVisibility extends TableColumn {
+  visible: boolean;
+  locked: boolean;
+}
+
+interface UseColumnSettingsParams {
+  pageId: string;
+  columns: TableColumn[];
+  alwaysVisibleKeys?: string[];
+}
+
+export function useColumnSettings({ pageId, columns, alwaysVisibleKeys = [] }: UseColumnSettingsParams) {
+  const store = useTableColumnStore();
+  const settings = store.getPageSettings(pageId);
+
+  const visibleColumns = useMemo(() => {
+    return columns.filter((col) => !settings.hiddenColumns.includes(col.key));
+  }, [columns, settings.hiddenColumns]);
+
+  const allColumnsWithVisibility = useMemo((): ColumnWithVisibility[] => {
+    return columns.map((col) => ({
+      ...col,
+      visible: !settings.hiddenColumns.includes(col.key),
+      locked: alwaysVisibleKeys.includes(col.key),
+    }));
+  }, [columns, settings.hiddenColumns, alwaysVisibleKeys]);
+
+  const columnWidths = settings.columnWidths;
+
+  const setColumnWidth = useCallback(
+    (key: string, width: number) => {
+      store.setColumnWidth(pageId, key, width);
+    },
+    [store, pageId]
+  );
+
+  const toggleColumnVisibility = useCallback(
+    (key: string) => {
+      if (alwaysVisibleKeys.includes(key)) return;
+      store.toggleColumnVisibility(pageId, key);
+    },
+    [store, pageId, alwaysVisibleKeys]
+  );
+
+  const resetSettings = useCallback(() => {
+    store.resetPageSettings(pageId);
+  }, [store, pageId]);
+
+  const hasHiddenColumns = settings.hiddenColumns.length > 0;
+
+  return {
+    visibleColumns,
+    allColumnsWithVisibility,
+    columnWidths,
+    setColumnWidth,
+    toggleColumnVisibility,
+    resetSettings,
+    hasHiddenColumns,
+  };
+}