Fix: Corrected ForecastView data structure and missing aggregated properties

services/dataProcessor.ts

@@ -1656,23 +1656,39 @@ export const calculateForecastViewData = (
             }
         }
 
-        // 3. Build monthly points
-        const monthlyData: MonthlyForecastPoint[] = MONTH_ORDER.map((m, idx) => {
+        // 3. Build monthly points and aggregate
+        const monthlyData: Record<string, MonthlyForecastPoint> = {};
+        let totalActualUnits = 0;
+        let totalForecastUnits = 0;
+
+        MONTH_ORDER.forEach((m, idx) => {
             const forecastUnits = Math.round(fc.annualForecast * productWeights[idx]);
             const actualUnits = actuals2026.get(identifier)?.get(m) || 0;
-            return {
+
+            monthlyData[m] = {
                 month: m,
                 forecastUnits,
-                actualUnits
-            };
+                actualUnits,
+                units: actualUnits // Added for chart compatibility
+            } as any;
+
+            totalActualUnits += actualUnits;
+            totalForecastUnits += forecastUnits;
         });
 
+        const accuracy = totalForecastUnits > 0
+            ? Math.min(100, Math.round((1 - Math.abs(totalActualUnits - totalForecastUnits) / totalForecastUnits) * 100))
+            : 0;
+
         return {
             asin: identifier,
             sku: meta?.sku || fc.sku || identifier,
             title: meta?.title || fc.title || identifier,
-            line: meta?.line || fc.line || "",
+            line: meta?.line || fc.line || "Unassigned",
             annualForecast: fc.annualForecast,
+            actualUnits: totalActualUnits,
+            forecastUnits: totalForecastUnits,
+            accuracy: Math.max(0, accuracy),
             monthlyData
         };
     });