feat: mostrar detalles del producto en Vendor tab cuando hay un solo ASIN

- Agregar tarjeta con SKU, ASIN y título al inicio de los gráficos
- Incluir Buy Box Warning Badge si el producto tiene issues
- Solo se muestra cuando hay un único ASIN seleccionado

Co-authored-by: Qwen-Coder <qwen-coder@alibabacloud.com>

components/VendorDataView.tsx

@@ -1,6 +1,7 @@
-import React, { useMemo } from 'react';
+import React, { useMemo, useState } from 'react';
 import { LineChart, Line, XAxis, YAxis, CartesianGrid, Tooltip, Legend, ResponsiveContainer } from 'recharts';
 import { BSRRecord } from '../types';
+import { BuyBoxWarningBadge } from './BuyBoxWarningBadge';
 
 const MARKET_COLORS: Record<string, string> = {
   DE: '#3b82f6',
@@ -12,6 +13,8 @@ const MARKET_COLORS: Record<string, string> = {
 
 interface VendorDataViewProps {
   bsrData: BSRRecord[];
+  asinMetadata?: Map<string, { sku: string; title: string; line: string }>;
+  buyBoxLostMap?: Map<string, { countries: string[]; reasons: Record<string, string> }>;
 }
 
 interface ChartPoint {
@@ -20,7 +23,7 @@ interface ChartPoint {
   [key: string]: number | string | null;
 }
 
-const VendorDataView: React.FC<VendorDataViewProps> = ({ bsrData = [] }) => {
+const VendorDataView: React.FC<VendorDataViewProps> = ({ bsrData = [], asinMetadata, buyBoxLostMap }) => {
   // Determine active markets in filtered data for series generation
   const activeMarkets = useMemo(() => {
     const m = new Set(bsrData.map(r => r.market));
@@ -33,6 +36,26 @@ const VendorDataView: React.FC<VendorDataViewProps> = ({ bsrData = [] }) => {
     return withDate > bsrData.length / 2;
   }, [bsrData]);
 
+  // Get unique ASINs in filtered data
+  const uniqueAsins = useMemo(() => {
+    const asinSet = new Set(bsrData.map(r => r.asin.trim().toUpperCase()));
+    return Array.from(asinSet);
+  }, [bsrData]);
+
+  // Get product info when single ASIN is selected
+  const productInfo = useMemo(() => {
+    if (uniqueAsins.length !== 1) return null;
+    const asin = uniqueAsins[0];
+    const metadata = asinMetadata?.get(asin);
+    if (!metadata) return null;
+    return {
+      asin,
+      sku: metadata.sku,
+      title: metadata.title,
+      line: metadata.line,
+    };
+  }, [uniqueAsins, asinMetadata]);
+
   // Aggregate Data for Charts — daily if dates available, else weekly
   const { topBsrChartData, detailBsrChartData, ratingChartData } = useMemo(() => {
     // Group by date string (YYYY-MM-DD) or by week number
@@ -121,6 +144,38 @@ const VendorDataView: React.FC<VendorDataViewProps> = ({ bsrData = [] }) => {
         <span className="text-slate-500 text-xs ml-auto">{bsrData.length.toLocaleString()} records filtered</span>
       </div>
 
+      {/* Product Info Card - Only shown when single ASIN is selected */}
+      {productInfo && (
+        <div className="bg-gradient-to-r from-indigo-500/10 to-purple-500/10 border border-indigo-500/30 rounded-xl p-4 animate-fade-in">
+          <div className="flex items-start gap-4">
+            <div className="flex-1 min-w-0">
+              <div className="flex items-center gap-2 mb-2">
+                <span className="text-[10px] font-black text-indigo-400 uppercase tracking-widest bg-indigo-500/20 px-2 py-0.5 rounded">
+                  Product Details
+                </span>
+              </div>
+              <div className="space-y-1.5">
+                <div className="flex items-center gap-2 flex-wrap">
+                  <span className="text-xs text-slate-500 font-bold uppercase tracking-wider">SKU:</span>
+                  <span className="text-sm font-mono font-bold text-slate-200">{productInfo.sku}</span>
+                </div>
+                <div className="flex items-center gap-2 flex-wrap">
+                  <span className="text-xs text-slate-500 font-bold uppercase tracking-wider">ASIN:</span>
+                  <span className="text-sm font-mono font-bold text-indigo-400">{productInfo.asin}</span>
+                </div>
+                <div className="flex items-start gap-2">
+                  <span className="text-xs text-slate-500 font-bold uppercase tracking-wider mt-0.5">Title:</span>
+                  <span className="text-sm font-medium text-slate-300">{productInfo.title}</span>
+                </div>
+              </div>
+            </div>
+            <div className="flex-shrink-0">
+              <BuyBoxWarningBadge asin={productInfo.asin} buyBoxLostMap={buyBoxLostMap} />
+            </div>
+          </div>
+        </div>
+      )}
+
       {/* Top Level BSR Trend Chart */}
       <div className="bg-slate-900/50 border border-slate-800 rounded-xl p-4">
         <h3 className="text-lg font-bold text-slate-200 mb-4">Top Level BSR Trend ({resolutionLabel})</h3>