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/App.tsx

@@ -1,6 +1,7 @@
 import React, { useState, useMemo, useEffect } from 'react';
 import * as XLSX from 'xlsx';
-import { AppState, ExcelRow, COLUMNS } from './types';
+import { AppState, ExcelRow, resolveColumnIndices, COLUMNS } from './types';
+import { ColumnsProvider } from './contexts/ColumnsContext';
 import { Sidebar } from './components/Sidebar';
 import { TopBar } from './components/TopBar';
 import { ProductDescriptions } from './components/ProductDescriptions';
@@ -121,18 +122,19 @@ export default function App() {
           console.log('Fetching synced data from Supabase...');
           const syncedData = await getAllSyncedRows(session?.access_token);
           
+          const resolvedCols = resolveColumnIndices(headers);
           const editableColumns = new Set([
-            COLUMNS.CLASSIFICATION,
-            COLUMNS.LONG_DE, COLUMNS.LONG_EN, 
-            COLUMNS.SHORT_DE, COLUMNS.SHORT_EN,
-            COLUMNS.DETAILS_DE, COLUMNS.DETAILS_EN,
-            COLUMNS.INNER_L, COLUMNS.INNER_W, COLUMNS.INNER_H,
-            COLUMNS.OUTER_L, COLUMNS.OUTER_W, COLUMNS.OUTER_H,
-            COLUMNS.UNITS_OUTER, COLUMNS.MOQ,
-            COLUMNS.VERIFIED_DIMS,
-            COLUMNS.VALIDATED_CHECK,
-            COLUMNS.VALIDATED_NOTE,
-            COLUMNS.PRODUCT_TYPE
+            resolvedCols.CLASSIFICATION,
+            resolvedCols.LONG_DE, resolvedCols.LONG_EN, 
+            resolvedCols.SHORT_DE, resolvedCols.SHORT_EN,
+            resolvedCols.DETAILS_DE, resolvedCols.DETAILS_EN,
+            resolvedCols.INNER_L, resolvedCols.INNER_W, resolvedCols.INNER_H,
+            resolvedCols.OUTER_L, resolvedCols.OUTER_W, resolvedCols.OUTER_H,
+            resolvedCols.UNITS_OUTER, resolvedCols.MOQ,
+            resolvedCols.VERIFIED_DIMS,
+            resolvedCols.VALIDATED_CHECK,
+            resolvedCols.VALIDATED_NOTE,
+            resolvedCols.PRODUCT_TYPE
           ]);
           
           headers.forEach((h: any, i: number) => {
@@ -142,7 +144,7 @@ export default function App() {
             }
           });
 
-          const articleNoIdx = COLUMNS.ARTICLE_NO;
+          const articleNoIdx = resolvedCols.ARTICLE_NO;
           const processedRows = rows.map(row => {
             const articleNo = String(row[articleNoIdx]);
             const synced = syncedData[articleNo];
@@ -530,7 +532,8 @@ export default function App() {
   }
 
   return (
-    <div className="h-screen bg-[#040d1a] text-slate-200 flex flex-col font-sans overflow-hidden">
+    <ColumnsProvider headers={appState.headers}>
+      <div className="h-screen bg-[#040d1a] text-slate-200 flex flex-col font-sans overflow-hidden">
       <TopBar
         stats={stats}
         activeModule={activeModule}
@@ -695,5 +698,6 @@ export default function App() {
         />
       )}
     </div>
+    </ColumnsProvider>
   );
 }

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('');

src/components/DataCompleteness.tsx

@@ -1,5 +1,6 @@
 import React, { useMemo, useState } from 'react';
-import { ExcelRow, COLUMNS } from '../types';
+import { ExcelRow } from '../types';
+import { useColumns } from '../contexts/ColumnsContext';
 import { ChevronDown, ChevronUp } from 'lucide-react';
 import { cn } from '../lib/utils';
 
@@ -9,6 +10,7 @@ interface DataCompletenessProps {
 }
 
 export function DataCompleteness({ data, headers }: DataCompletenessProps) {
+  const COLUMNS = useColumns();
   const [sortCol, setSortCol] = useState<number | 'score'>('score');
   const [sortDesc, setSortDesc] = useState(false);
   const [page, setPage] = useState(1);

src/components/DimensionsView.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 { AlertTriangle, CheckCircle2, ChevronDown, ChevronRight, Edit2, Package, Boxes, Scale, Loader2, RefreshCw, Layers, Link2, Search, Filter, X, Undo2 } from 'lucide-react';
 import { cn } from '../lib/utils';
 import { ConfirmModal } from './ConfirmModal';
@@ -35,6 +36,7 @@ interface NearDuplicateCluster {
 }
 
 export function DimensionsView({ data, headers, onEdit, onSaveRow, onCaptureState, rowStatuses, onRevertRow }: DimensionsViewProps) {
+  const COLUMNS = useColumns();
   const [expandedGroups, setExpandedGroups] = useState<Set<string>>(new Set());
   const [expandedNearDuplicates, setExpandedNearDuplicates] = useState<Set<number>>(new Set());
   const [showOnlyInconsistent, setShowOnlyInconsistent] = useState(true);

src/components/EditPanel.tsx

@@ -1,5 +1,6 @@
 import React, { useState, useRef, useCallback } from 'react';
-import { ExcelRow, COLUMNS } from '../types';
+import { ExcelRow } from '../types';
+import { useColumns } from '../contexts/ColumnsContext';
 import { X, Sparkles, Save, Loader2, Languages, Package, CheckCircle2, Mic, MicOff } from 'lucide-react';
 import { generateGemini } from '../services/gemini';
 import { cn } from '../lib/utils';
@@ -126,6 +127,7 @@ const FieldEditor = ({
 );
 
 export function EditPanel({ row, rowIndex, onSave, onClose, onCaptureState }: EditPanelProps) {
+  const COLUMNS = useColumns();
   const [formData, setFormData] = useState({
     longDe: row[COLUMNS.LONG_DE] || '',
     longEn: row[COLUMNS.LONG_EN] || '',

src/components/HistoryView.tsx

@@ -1,7 +1,8 @@
 import React, { useState, useEffect } from 'react';
 import { History, RotateCcw, ChevronDown, ChevronRight, User, Calendar, Tag, Search, X, Edit2 } from 'lucide-react';
 import { getHistory, deleteHistoryEntry, HistoryEntry } from '../lib/supabase';
-import { ExcelRow, COLUMNS } from '../types';
+import { ExcelRow } from '../types';
+import { useColumns } from '../contexts/ColumnsContext';
 import { cn } from '../lib/utils';
 
 interface HistoryViewProps {
@@ -13,6 +14,7 @@ interface HistoryViewProps {
 }
 
 export function HistoryView({ headers, data, onRevert, onEdit, sessionToken }: HistoryViewProps) {
+  const COLUMNS = useColumns();
   const [history, setHistory] = useState<HistoryEntry[]>([]);
   const [loading, setLoading] = useState(true);
   const [expandedId, setExpandedId] = useState<string | null>(null);

src/components/MissingDataView.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, ChevronDown, ChevronUp, X, Edit2, Save } from 'lucide-react';
 import { cn } from '../lib/utils';
 import { ColumnFilterPopover } from './ColumnFilterPopover';
@@ -65,6 +66,7 @@ interface EditingState {
 }
 
 export function MissingDataView({ data, headers, onSaveRow, onCaptureState }: MissingDataViewProps) {
+  const COLUMNS = useColumns();
   const [activeTab, setActiveTab] = useState<TabType>('missingLaunch');
   const [search, setSearch] = useState('');
   const [sortCol, setSortCol] = useState<number | null>(null);

src/components/PendingValidationView.tsx

@@ -1,5 +1,6 @@
 import React, { useState } from 'react';
-import { ExcelRow, COLUMNS } from '../types';
+import { ExcelRow } from '../types';
+import { useColumns } from '../contexts/ColumnsContext';
 import { Clock, Undo2, Package, Box, DollarSign, FileText, Search, Filter, X } from 'lucide-react';
 import { cn } from '../lib/utils';
 
@@ -12,6 +13,7 @@ interface PendingValidationViewProps {
 }
 
 export function PendingValidationView({ data, pendingRows, rowStatuses, onRevertRow, onEdit }: PendingValidationViewProps) {
+  const COLUMNS = useColumns();
   const [search, setSearch] = useState('');
 
   const pendingEntries = Object.entries(pendingRows);

src/components/PricingView.tsx

@@ -1,5 +1,6 @@
 import React, { useState, useMemo, useRef, useCallback, useEffect } from 'react';
-import { ExcelRow, COLUMNS } from '../types';
+import { ExcelRow } from '../types';
+import { useColumns } from '../contexts/ColumnsContext';
 import {
   AlertTriangle,
   AlertCircle,
@@ -48,6 +49,7 @@ function findCol(headers: string[], ...keywords: string[]): number {
 }
 
 export function PricingView({ data, headers, onSaveRow, onCaptureState, onEdit, rowStatuses }: PricingViewProps) {
+  const COLUMNS = useColumns();
   const [filterMode, setFilterMode] = useState<FilterMode>('all_errors');
   const [search, setSearch] = useState('');
   const [searchMode, setSearchMode] = useState<'all' | 'selected'>('all');
@@ -193,15 +195,10 @@ export function PricingView({ data, headers, onSaveRow, onCaptureState, onEdit,
     const nwIdx = findCol(headers, 'nw');
     const gwIdx = findCol(headers, 'gw');
 
-    // Units/Outer column — try dynamic detection first, fall back to hardcoded index
-    const unitsOuterIdx = findCol(headers, 'units', 'outer') >= 0
-      ? findCol(headers, 'units', 'outer')
-      : findCol(headers, 'vpe') >= 0
-        ? findCol(headers, 'vpe')
-        : COLUMNS.UNITS_OUTER;
+    const unitsOuterIdx = COLUMNS.UNITS_OUTER;
 
     return { uvpIdx, srpCols: srp, containerCols: container, nwIdx, gwIdx, unitsOuterIdx };
-  }, [headers]);
+  }, [headers, COLUMNS]);
 
   // ── Error analysis per row ────────────────────────────────────────────────
   const analyzedRows = useMemo(() => {

src/components/ProductDescriptions.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, X } from 'lucide-react';
 import { cn } from '../lib/utils';
 import { ColumnFilterPopover } from './ColumnFilterPopover';
@@ -12,12 +13,11 @@ interface ProductDescriptionsProps {
   rowStatuses: Record<string, string>;
 }
 
-type TabType = 'all' | 'missingLongDE' | 'missingLongEN' | 'missingShortDE' | 'missingShortEN' | 'complete' | 'incomplete';
-
-// Description columns that should only have Present/Missing filters
-const DESCRIPTION_COLUMNS = [COLUMNS.LONG_DE, COLUMNS.LONG_EN, COLUMNS.SHORT_DE, COLUMNS.SHORT_EN, COLUMNS.DETAILS_DE, COLUMNS.DETAILS_EN];
-
 export function ProductDescriptions({ data, headers, asinColumnIndex, onEdit, rowStatuses }: ProductDescriptionsProps) {
+  const COLUMNS = useColumns();
+
+  // Description columns that should only have Present/Missing filters
+  const DESCRIPTION_COLUMNS = [COLUMNS.LONG_DE, COLUMNS.LONG_EN, COLUMNS.SHORT_DE, COLUMNS.SHORT_EN, COLUMNS.DETAILS_DE, COLUMNS.DETAILS_EN];
   const [activeTab, setActiveTab] = useState<TabType>('all');
   const [search, setSearch] = useState('');
   const [lineFilter, setLineFilter] = useState('');

src/contexts/ColumnsContext.tsx

@@ -0,0 +1,23 @@
+import React, { createContext, useContext, useMemo } from 'react';
+import { COLUMNS, resolveColumnIndices } from '../types';
+
+type ColumnIndices = typeof COLUMNS;
+
+const ColumnsContext = createContext<ColumnIndices>(COLUMNS);
+
+export function ColumnsProvider({ headers, children }: { headers: string[], children: React.ReactNode }) {
+  const resolved = useMemo(() => {
+    if (!headers || headers.length === 0) return COLUMNS;
+    return resolveColumnIndices(headers);
+  }, [headers]);
+
+  return (
+    <ColumnsContext.Provider value={resolved}>
+      {children}
+    </ColumnsContext.Provider>
+  );
+}
+
+export function useColumns() {
+  return useContext(ColumnsContext);
+}

src/types.ts

@@ -9,6 +9,7 @@ export interface AppState {
   asinColumnIndex: number | null;
 }
 
+// Canonical column indices (defaults)
 export const COLUMNS = {
   ARTICLE_NO: 0,
   ARTICLE_NAME: 2,
@@ -16,28 +17,79 @@ export const COLUMNS = {
   LICENSE: 8,
   DETAILS_EN: 9,
   DETAILS_DE: 10,
-  BARCODE: 28,
-  TARIFF_CODE: 58,
-  COUNTRY_ORIGIN: 60,
-  LONG_DE: 62,
-  LONG_EN: 63,
-  SHORT_DE: 64,
-  SHORT_EN: 65,
-  RECOMMENDED_AGE: 67,
+  BARCODE: 29,
+  TARIFF_CODE: 60,
+  COUNTRY_ORIGIN: 62,
+  LONG_DE: 64,
+  LONG_EN: 65,
+  SHORT_DE: 66,
+  SHORT_EN: 67,
+  RECOMMENDED_AGE: 70,
   CLASSIFICATION: 11,
-  ITEM_AVAILABLE: 14,
-  MOQ: 27,
-  UNITS_INNER: 31,
-  UNITS_OUTER: 32,
-  ASIN: 33,
-  INNER_W: 42,
-  INNER_L: 43,
-  INNER_H: 44,
-  OUTER_W: 47,
-  OUTER_L: 48,
-  OUTER_H: 49,
+  ITEM_AVAILABLE: 16,
+  MOQ: 28,
+  UNITS_INNER: 32,
+  UNITS_OUTER: 33,
+  ASIN: 76,
+  INNER_W: 43,
+  INNER_L: 44,
+  INNER_H: 45,
+  OUTER_W: 48,
+  OUTER_L: 49,
+  OUTER_H: 50,
   VERIFIED_DIMS: 100,
   VALIDATED_CHECK: 101,
   VALIDATED_NOTE: 102,
   PRODUCT_TYPE: 103
-};
+};
+
+// Search patterns for dynamic detection
+export const COLUMN_PATTERNS: Record<keyof typeof COLUMNS, string[]> = {
+  ARTICLE_NO: ['article', 'no'],
+  ARTICLE_NAME: ['article', 'name'],
+  LINE: ['line'],
+  LICENSE: ['license'],
+  DETAILS_EN: ['details', 'english'],
+  DETAILS_DE: ['details', 'german'],
+  BARCODE: ['article', 'barcode'],
+  TARIFF_CODE: ['tariff', 'code'],
+  COUNTRY_ORIGIN: ['country', 'origin'],
+  LONG_DE: ['long', 'description', 'german'],
+  LONG_EN: ['long', 'description', 'english'],
+  SHORT_DE: ['short', 'description', 'german'],
+  SHORT_EN: ['short', 'description', 'english'],
+  RECOMMENDED_AGE: ['recommended', 'age'],
+  CLASSIFICATION: ['classification'],
+  ITEM_AVAILABLE: ['item', 'available'],
+  MOQ: ['moq'],
+  UNITS_INNER: ['units', 'inner'],
+  UNITS_OUTER: ['units', 'outer'],
+  ASIN: ['asin'],
+  INNER_W: ['inner', 'w'],
+  INNER_L: ['inner', 'l'],
+  INNER_H: ['inner', 'h'],
+  OUTER_W: ['outer', 'w'],
+  OUTER_L: ['outer', 'l'],
+  OUTER_H: ['outer', 'h'],
+  // Virtual/Extra columns stay hardcoded or managed elsewhere
+  VERIFIED_DIMS: ['verified'],
+  VALIDATED_CHECK: ['validated'],
+  VALIDATED_NOTE: ['note'],
+  PRODUCT_TYPE: ['product', 'type']
+};
+
+export function resolveColumnIndices(headers: string[]): typeof COLUMNS {
+  const resolved = { ...COLUMNS };
+  const h = headers.map(val => String(val || '').toLowerCase());
+
+  Object.entries(COLUMN_PATTERNS).forEach(([key, patterns]) => {
+    const idx = h.findIndex(headerText => 
+      patterns.every(p => headerText.includes(p.toLowerCase()))
+    );
+    if (idx >= 0) {
+      resolved[key as keyof typeof COLUMNS] = idx;
+    }
+  });
+
+  return resolved;
+}