feat: add vendor stock badges to Sell-in vs Budget first column

Shows aggregated EU and UK vendor stock per SKU (sum across all ASINs)
in the first column, matching the style used in other dashboard tabs.

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

App.tsx

@@ -898,7 +898,7 @@ const App: React.FC = () => {
 
               <Suspense fallback={<LoadingSpinner />}>
                 <div className={view === 'forecast' ? '' : 'hidden'}>
-                  <ForecastView asinMetadata={globalAsinMetadata} />
+                  <ForecastView asinMetadata={globalAsinMetadata} vendorStockMap={vendorStockMap} />
                 </div>
               </Suspense>
 

components/ForecastView.tsx

@@ -2,6 +2,7 @@ import React, { useState, useMemo, useCallback, useRef } from 'react';
 import * as XLSX from 'xlsx';
 import { ExcelFilter } from './ExcelFilter';
 import { ColumnFilterCondition } from '../types';
+import { AmazonSmileIcon } from './Icons';
 
 const MONTHS = ['January','February','March','April','May','June','July','August','September','October','November','December'];
 const MONTHS_SHORT = ['Jan','Feb','Mar','Apr','May','Jun','Jul','Aug','Sep','Oct','Nov','Dec'];
@@ -33,6 +34,8 @@ interface ComparisonRow {
   budgetDiscrepancy: boolean;
   pctPeriod: number;
   pctAnnual: number;
+  vendorStockEU: number;
+  vendorStockUK: number;
 }
 
 function parseSellIn(buffer: ArrayBuffer): Map<string, SellInRow> {
@@ -132,8 +135,34 @@ const ComparisonTableRow: React.FC<{ row: ComparisonRow }> = React.memo(({ row }
   const barWidth = Math.min(100, row.pctPeriod);
   return (
     <tr className="hover:bg-indigo-500/5 transition-colors border-b border-slate-800/50 last:border-0">
-      <td className="px-4 py-3 whitespace-nowrap">
+      <td className="px-4 py-3">
+        <div className="flex flex-col gap-1">
           <span className="text-xs font-black text-indigo-400 tracking-tighter">{row.sku}</span>
+          {(row.vendorStockEU > 0 || row.vendorStockUK > 0) && (
+            <div className="flex flex-col gap-0.5">
+              {row.vendorStockEU > 0 && (
+                <div
+                  className="inline-flex items-center gap-1 px-1.5 py-0.5 rounded border text-[10px] font-bold bg-slate-200 text-slate-800 border-slate-300 w-fit"
+                  title={`Stock Amazon Vendor EU: ${row.vendorStockEU}`}
+                >
+                  <AmazonSmileIcon className="w-3 h-3 shrink-0" />
+                  <span className="text-[7px] font-black uppercase opacity-60">EU</span>
+                  <span>{row.vendorStockEU.toLocaleString('de-DE')}</span>
+                </div>
+              )}
+              {row.vendorStockUK > 0 && (
+                <div
+                  className="inline-flex items-center gap-1 px-1.5 py-0.5 rounded border text-[10px] font-bold bg-slate-200 text-slate-800 border-slate-300 w-fit"
+                  title={`Stock Amazon Vendor UK: ${row.vendorStockUK}`}
+                >
+                  <AmazonSmileIcon className="w-3 h-3 shrink-0" />
+                  <span className="text-[7px] font-black uppercase opacity-60">UK</span>
+                  <span>{row.vendorStockUK.toLocaleString('de-DE')}</span>
+                </div>
+              )}
+            </div>
+          )}
+        </div>
       </td>
       <td className="px-4 py-3 max-w-[280px]">
         <span className="text-sm text-slate-200 line-clamp-1" title={row.description}>
@@ -188,9 +217,10 @@ const ComparisonTableRow: React.FC<{ row: ComparisonRow }> = React.memo(({ row }
 
 interface ForecastViewProps {
   asinMetadata?: Map<string, { sku: string; title: string; line: string }>;
+  vendorStockMap?: Map<string, { eu: number; uk: number }>;
 }
 
-const ForecastView: React.FC<ForecastViewProps> = ({ asinMetadata }) => {
+const ForecastView: React.FC<ForecastViewProps> = ({ asinMetadata, vendorStockMap }) => {
   const [sellInData, setSellInData] = useState<Map<string, SellInRow> | null>(null);
   const [budgetData, setBudgetData] = useState<Map<string, BudgetRow> | null>(null);
   const [sellInFileName, setSellInFileName] = useState('');
@@ -258,10 +288,17 @@ const ForecastView: React.FC<ForecastViewProps> = ({ asinMetadata }) => {
       const pctPeriod = periodForecast > 0 ? (actualUnits / periodForecast) * 100 : 0;
       const pctAnnual = budgetYearTotal > 0 ? (actualUnits / budgetYearTotal) * 100 : 0;
       const meta = skuMetadata.get(budgetRow.sku);
+      const asins = meta?.asins ?? [];
+      const vendorStockEU = asins.reduce((sum, asin) => {
+        return sum + (vendorStockMap?.get(asin.trim().toUpperCase())?.eu ?? 0);
+      }, 0);
+      const vendorStockUK = asins.reduce((sum, asin) => {
+        return sum + (vendorStockMap?.get(asin.trim().toUpperCase())?.uk ?? 0);
+      }, 0);
       rows.push({
         sku: budgetRow.sku,
         description: budgetRow.description,
-        asins: meta?.asins ?? [],
+        asins,
         title: meta?.title ?? '',
         actualUnits,
         periodForecast,
@@ -269,10 +306,12 @@ const ForecastView: React.FC<ForecastViewProps> = ({ asinMetadata }) => {
         budgetDiscrepancy,
         pctPeriod,
         pctAnnual,
+        vendorStockEU,
+        vendorStockUK,
       });
     });
     return rows;
-  }, [budgetData, sellInData, cutoffMonth, skuMetadata]);
+  }, [budgetData, sellInData, cutoffMonth, skuMetadata, vendorStockMap]);
 
   const passesTextFilter = useCallback((value: string, filter?: ColumnFilterCondition): boolean => {
     if (!filter) return true;