Add sales report functions

Backend/ERPCore/Dtos/Sales/SalesInvoiceDtos.cs

@@ -10,7 +10,7 @@ public sealed record SalesInvoiceLineDto(
     decimal TaxPct, decimal TaxAmount, bool IsFreeIssue, int? ParentLineId);
 
 public sealed record SalesInvoiceTotalsDto(
-    decimal Subtotal, decimal DiscountTotal, decimal TaxTotal, decimal GrandTotal,
+    decimal Subtotal, decimal DiscountTotal, decimal FreeQtyTotal, decimal TaxTotal, decimal GrandTotal,
     decimal RoundOff, decimal NetPayable, decimal PaidAmount, decimal BalanceAmount);
 
 public sealed record SalesInvoiceDto(

Backend/ERPCore/Dtos/Sales/SalesReportDtos.cs

@@ -0,0 +1,68 @@
+namespace ERPCore.Dtos.Sales;
+
+public sealed record SalesDailySummaryRowDto(
+    DateOnly Date,
+    int InvoiceCount,
+    int SlipCount,
+    decimal InvoiceSubtotal,
+    decimal SlipSubtotal,
+    decimal DiscountTotal,
+    decimal FreeQtyTotal,
+    decimal TaxTotal,
+    decimal GrandTotal);
+
+public sealed record SalesItemSummaryRowDto(
+    int ItemId,
+    string ItemName,
+    decimal SoldQty,
+    decimal FreeQty,
+    decimal GrossAmount,
+    decimal DiscountTotal,
+    decimal TaxTotal,
+    decimal NetAmount);
+
+public sealed record SalesCustomerSummaryRowDto(
+    int CustomerId,
+    string CustomerName,
+    int InvoiceCount,
+    int SlipCount,
+    decimal SoldQty,
+    decimal FreeQty,
+    decimal GrossAmount,
+    decimal DiscountTotal,
+    decimal TaxTotal,
+    decimal NetAmount);
+
+public sealed record SalesWarehouseSummaryRowDto(
+    int WarehouseId,
+    string WarehouseName,
+    int InvoiceCount,
+    int SlipCount,
+    decimal SoldQty,
+    decimal FreeQty,
+    decimal GrossAmount,
+    decimal DiscountTotal,
+    decimal TaxTotal,
+    decimal NetAmount);
+
+public sealed record SalesDiscountSummaryRowDto(
+    string DocumentType,
+    string DocumentNo,
+    DateTime DocumentDate,
+    string CustomerName,
+    decimal Subtotal,
+    decimal DiscountTotal,
+    decimal TaxTotal,
+    decimal NetAmount);
+
+public sealed record SalesFreeIssueSummaryRowDto(
+    string DocumentType,
+    string DocumentNo,
+    DateTime DocumentDate,
+    string CustomerName,
+    int ItemId,
+    string ItemName,
+    decimal FreeQty,
+    decimal FreeValue,
+    int WarehouseId,
+    string WarehouseName);

Backend/ERPCore/Dtos/Sales/SalesSlipDtos.cs

@@ -10,7 +10,7 @@ public sealed record SalesSlipLineDto(
     decimal TaxPct, decimal TaxAmount, bool IsFreeIssue, int? ParentLineId);
 
 public sealed record SalesSlipTotalsDto(
-    decimal Subtotal, decimal DiscountTotal, decimal TaxTotal, decimal GrandTotal,
+    decimal Subtotal, decimal DiscountTotal, decimal FreeQtyTotal, decimal TaxTotal, decimal GrandTotal,
     decimal PaidAmount, decimal BalanceAmount);
 
 public sealed record SalesSlipDto(