Fix: Implement dynamic column detection to handle Excel structure changes (insertion of PM Classification). This fixes the Missing data error in Pricing Units and other views.

src/components/ArticleDetails.tsx

@@ -1,5 +1,6 @@
 import React, { useState, useMemo } from 'react';
-import { ExcelRow, COLUMNS } from '../types';
+import { ExcelRow } from '../types';
+import { useColumns } from '../contexts/ColumnsContext';
 import { Search, Filter, Edit2, ChevronDown, ChevronUp, Info, Package, X } from 'lucide-react';
 import { cn } from '../lib/utils';
 import { ColumnFilterPopover } from './ColumnFilterPopover';
@@ -13,6 +14,7 @@ interface ArticleDetailsProps {
 type TabType = 'all' | 'missingDetailsDE' | 'missingDetailsEN' | 'missingAnyDetails' | 'lowStock';
 
 export function ArticleDetails({ data, onEdit, rowStatuses }: ArticleDetailsProps) {
+  const COLUMNS = useColumns();
   const [activeTab, setActiveTab] = useState<TabType>('all');
   const [search, setSearch] = useState('');
   const [lineFilter, setLineFilter] = useState('');