Fix: correctly filter Dashboard revenue by enforcing Marketplace and Unit rules in filterData

services/dataProcessor.ts

@@ -1155,7 +1155,13 @@ export const filterData = (
     }
 
     // 2. Standard Filters
-    return result.filter(item => { // Apply remaining filters to the 'result'
+    return result.filter(item => { 
+        // 0. Core Business Rules (Revenue Integrity)
+        // These filters ensure that only valid Amazon sales are aggregated, 
+        // excluding ad spend and marketing records that might be present in the raw source.
+        if (!isAllowedCustomer(item.customer)) return false;
+        if (item.units === 0) return false;
+
         // 1. Month Logic: Handle "Apr-23" matching "Apr" filter
         const recordMonth = item.month; // e.g. "Apr-23"
         const pureMonth = recordMonth.split('-')[0]; // "Apr"