Invoice handling with versioning and item updates

Distribution/Features/Invoice/InvoiceDTOs.cs

@@ -3,10 +3,35 @@
 namespace Distribution.Features.Invoice;
 
 public record CreateInvoiceRequest(Guid ShopPOId, Guid? CreatedByUserId = null);
-public record InvoiceItemAdjustment(Guid ShopPOItemId, int AdjustedQuantity, string? Note = null);
+public record InvoiceItemAdjustment(Guid InvoiceItemId, int AdjustedQuantity, bool IsRemoved = false, string? Note = null);
 public record FinalizeInvoiceRequest(List<InvoiceItemAdjustment>? Adjustments = null, Guid? FinalizedByUserId = null);
 public record PrintInvoiceRequest(Guid? PrintedByUserId = null);
 
+// InvoiceItemId set = edit/remove/restore an existing line; ItemId set (InvoiceItemId null) = add a new line.
+public record InvoiceItemEdit(Guid? InvoiceItemId, Guid? ItemId, int Quantity, decimal? UnitPrice = null, bool IsRemoved = false);
+public record UpdateInvoiceItemsRequest(List<InvoiceItemEdit> Items, Guid? EditedByUserId = null);
+
+public record InvoiceVersionItemResponse(Guid? ShopPOItemId, Guid ItemId, string ItemName, int Quantity, decimal UnitPrice, bool IsRemoved);
+
+public record InvoiceVersionResponse(
+    Guid Id,
+    int VersionNumber,
+    InvoiceVersionStage Stage,
+    decimal TotalAmount,
+    Guid CreatedBy,
+    DateTime CreatedAt,
+    List<InvoiceVersionItemResponse> Items);
+
+public record InvoiceItemResponse(
+    Guid Id,
+    Guid? ShopPOItemId,
+    Guid ItemId,
+    string ItemName,
+    int? OrderedQuantity,
+    int Quantity,
+    decimal UnitPrice,
+    bool IsRemoved);
+
 public record InvoiceResponse(
     Guid Id,
     Guid ShopPOId,
@@ -22,6 +47,7 @@ public record InvoiceResponse(
     decimal TotalAmount,
     decimal PaidAmount,
     bool IsActive,
-    DateTime CreatedAt);
+    DateTime CreatedAt,
+    List<InvoiceItemResponse> Items);
 
 public record OutstandingPaymentsResponse(int InvoiceCount, decimal OutstandingAmount);