product and sales fixers

Backend/ERPCore/Dtos/Config/ProductConfigDtos.cs

@@ -12,6 +12,8 @@ namespace ERPCore.Dtos.Config;
 public sealed record ProductConfigDto(
     bool SubcategoriesEnabled, bool BrandsEnabled, bool ItemTypesEnabled,
     bool SellingPricesEnabled, bool SerialNumbersEnabled, bool BatchListsEnabled, bool WarrantyPeriodsEnabled,
+    bool CustomVariantsEnabled, bool ItemImagesEnabled,
+    bool CustomWarrantyPeriodsEnabled,
     DateTime? UpdatedAt, int? UpdatedBy);
 
 /// <summary>
@@ -32,4 +34,7 @@ public sealed class UpdateProductConfigRequest
     [Required] public bool? SerialNumbersEnabled { get; set; }
     [Required] public bool? BatchListsEnabled { get; set; }
     [Required] public bool? WarrantyPeriodsEnabled { get; set; }
+    [Required] public bool? CustomVariantsEnabled { get; set; }
+    [Required] public bool? ItemImagesEnabled { get; set; }
+    [Required] public bool? CustomWarrantyPeriodsEnabled { get; set; }
 }

Backend/ERPCore/Dtos/Config/SalesConfigDtos.cs

@@ -0,0 +1,25 @@
+using System.ComponentModel.DataAnnotations;
+
+namespace ERPCore.Dtos.Config;
+
+/// <summary>Sales configuration resource. <c>CashCustomerId</c>/<c>CashCustomerName</c> identify
+/// the generic cash customer (null until the option has been switched on at least once).</summary>
+public sealed record SalesConfigDto(
+    bool AllowCashCustomer, int? CashCustomerId, string? CashCustomerName, bool AllowFreeItems, bool AllowDiscounts, bool AllowOverStockSale,
+    bool AllowWarehouseSelection, int? DefaultWarehouseId, string? DefaultWarehouseName, DateTime? UpdatedAt, int? UpdatedBy);
+
+/// <summary>
+/// Full replacement of the flags. <c>UpdatedBy</c> is derived from the token, never posted.
+/// Nullable bool so an omitted flag is a 400 rather than silently binding to <c>false</c>
+/// (same reasoning as <see cref="UpdateBranchConfigRequest"/>).
+/// </summary>
+public sealed class UpdateSalesConfigRequest
+{
+    [Required] public bool? AllowCashCustomer { get; set; }
+    [Required] public bool? AllowFreeItems { get; set; }
+    [Required] public bool? AllowDiscounts { get; set; }
+    [Required] public bool? AllowOverStockSale { get; set; }
+    [Required] public bool? AllowWarehouseSelection { get; set; }
+    /// <summary>Required when <see cref="AllowWarehouseSelection"/> is false.</summary>
+    public int? DefaultWarehouseId { get; set; }
+}

Backend/ERPCore/Dtos/Items/ItemImageDtos.cs

@@ -0,0 +1,7 @@
+namespace ERPCore.Dtos.Items;
+
+/// <summary>An item photo's metadata. The bytes are served by
+/// <c>GET /items/{itemId}/images/{itemImageId}/content</c>.</summary>
+public sealed record ItemImageDto(
+    int ItemImageId, int ItemId, string FileName, string ContentType, long SizeBytes,
+    int SortOrder, DateTime UploadedAt);

Backend/ERPCore/Dtos/Items/ItemOverviewDtos.cs

@@ -16,3 +16,12 @@ public sealed record ItemOverviewDto(
     decimal StockQty, decimal StockValue, bool IsLowStock,
     DateTime? LastPurchaseDate, int? LastSupplierId, string? LastSupplierName,
     decimal SalesQtyLast30Days);
+
+/// <summary>Stock-state filter for the Items overview. <c>LowStock</c> uses the same rule
+/// as <see cref="ItemOverviewDto.IsLowStock"/>: on-hand at or below any warehouse's reorder point.</summary>
+public enum ItemStockFilter
+{
+    InStock,
+    OutOfStock,
+    LowStock
+}

Backend/ERPCore/Dtos/Items/WarrantyPeriodDtos.cs

@@ -0,0 +1,17 @@
+using System.ComponentModel.DataAnnotations;
+using ERPCore.Domain.Enums;
+
+namespace ERPCore.Dtos.Items;
+
+public sealed record WarrantyPeriodDto(int WarrantyPeriodId, int Months, EntityStatus Status, DateTime CreatedAt, DateTime? UpdatedAt);
+
+/// <summary>A new custom length, always in months (the client converts years).</summary>
+public sealed class CreateWarrantyPeriodRequest
+{
+    [Required] public int? Months { get; set; }
+}
+
+public sealed class UpdateWarrantyPeriodStatusRequest
+{
+    [Required] public EntityStatus Status { get; set; }
+}

Backend/ERPCore/Dtos/Sales/SalesInvoiceDtos.cs

@@ -44,6 +44,14 @@ public sealed record SalesInvoicePostingCheckDto(
     int SalesInvoiceId, string InvoiceNo, SalesInvoiceStatus Status, bool CanPost,
     IReadOnlyList<SalesInvoicePostingIssueDto> Issues);
 
+/// <summary>The unit price a new line would get if left blank — same rule as on save
+/// (SALE_PRICE, else GRN_WEIGHTED_AVG for the warehouse, else FIFO_AVG).</summary>
+public sealed record SalesSuggestedPriceDto(int ItemId, int WarehouseId, decimal UnitPrice, string PriceSource);
+
+/// <summary>Issuable stock for one item at one warehouse (on-hand less on-hold), for New Sale's
+/// per-line shortage warning. <c>IsStocked</c> false = non-stock item, never limited.</summary>
+public sealed record SalesStockAvailabilityDto(int ItemId, int WarehouseId, bool IsStocked, decimal Available);
+
 public sealed class CreateSalesInvoiceLineRequest
 {
     [Required] public int ItemId { get; set; }