refactor: modularize application domains

src/modules/energy/electric-daily/model.ts

@@ -0,0 +1,25 @@
+import type { ElectricMonthGroup } from '../types';
+
+export function summarizeElectricMonths(months: ElectricMonthGroup[] | null) {
+  const source = months ?? [];
+  const totalKwh = source.reduce((sum, month) => sum + (month.kwh || 0), 0);
+  const totalFee = source.reduce((sum, month) => sum + (month.fee || 0), 0);
+  const activeDays = source.reduce(
+    (sum, month) => sum + month.rows.filter(row => row.kwh > 0).length,
+    0,
+  );
+  const abnormalDays = source.reduce(
+    (sum, month) => sum + month.rows.filter(row => Math.abs(row.chainPct) >= 0.3).length,
+    0,
+  );
+
+  return {
+    totalKwh,
+    totalFee,
+    activeDays,
+    abnormalDays,
+    avgKwh: activeDays > 0 ? totalKwh / activeDays : 0,
+    avgPrice: totalKwh > 0 ? totalFee / totalKwh : 0,
+    hasFeeDetail: totalFee > 0,
+  };
+}