fix: include empty-ASIN ad records so MKT total matches ADs Weekly

Removed the `if (asin)` guard so records without a product ASIN
(e.g. campaign-level rows) accumulate in adsSpendMap and appear as
an 'Unassigned Ad Spend' row, ensuring the total PPC spend is the
same as in the ADs Weekly tab.

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

components/mkt/MktDataView.tsx

@@ -169,10 +169,11 @@ export default function MktDataView({ rawData, adsData }: MktDataViewProps) {
     });
 
     // ASIN → global ad spend (all filtered data, no hardcoded year)
+    // Include ALL records (even empty ASIN) so total matches ADs Weekly tab
     const adsSpendMap = new Map<string, number>();
     adsData.forEach(r => {
       const asin = r.asin.trim().toUpperCase();
-      if (asin) adsSpendMap.set(asin, (adsSpendMap.get(asin) || 0) + r.cost);
+      adsSpendMap.set(asin, (adsSpendMap.get(asin) || 0) + r.cost);
     });
 
     // Deals/Promos/Chargebacks are 2025-only data — only apply when 2025 is in scope
@@ -201,23 +202,23 @@ export default function MktDataView({ rawData, adsData }: MktDataViewProps) {
         cogs: 0,
       }));
 
-    // Add ASINs that have ad spend but no sales records (so total matches ADs tab)
+    // Add ASINs (or unassigned spend) that have ad spend but no sales records
     adsSpendMap.forEach((spend, asin) => {
       if (!metaMap.has(asin) && spend > 0) {
         products.push({
-          id: asin,
-          asin,
+          id: asin || '__unassigned__',
+          asin: asin || '—',
           sku: '',
-          name: asin,
+          name: asin ? asin : 'Unassigned Ad Spend',
           image: '',
           category: 'Other',
           brand: '',
           grossSales: 0,
           unitsSold: 0,
           ppcSpend: spend,
-          deals: getDeals(asin),
-          promos: getPromos(asin),
-          chargebacks: getChargebacks(asin),
+          deals: asin ? getDeals(asin) : 0,
+          promos: asin ? getPromos(asin) : 0,
+          chargebacks: asin ? getChargebacks(asin) : 0,
           chargebacksPrevMonth: 0,
           cogs: 0,
         });