feat: implement tenant product category management APIs

src/Domain/TakeoutSaaS.Domain/Products/Entities/ProductCategory.cs

@@ -31,4 +31,14 @@ public sealed class ProductCategory : MultiTenantEntityBase
     /// 是否启用。
     /// </summary>
     public bool IsEnabled { get; set; } = true;
+
+    /// <summary>
+    /// 分类图标。
+    /// </summary>
+    public string? Icon { get; set; }
+
+    /// <summary>
+    /// 分类可见渠道 JSON。
+    /// </summary>
+    public string ChannelsJson { get; set; } = "[\"wm\"]";
 }

src/Domain/TakeoutSaaS.Domain/Products/Repositories/IProductRepository.cs

@@ -28,6 +28,36 @@ public interface IProductRepository
     /// </summary>
     Task<IReadOnlyList<ProductCategory>> GetCategoriesByStoreAsync(long tenantId, long storeId, bool onlyEnabled = true, CancellationToken cancellationToken = default);
 
+    /// <summary>
+    /// 依据标识读取分类。
+    /// </summary>
+    Task<ProductCategory?> FindCategoryByIdAsync(long categoryId, long tenantId, CancellationToken cancellationToken = default);
+
+    /// <summary>
+    /// 判断门店内分类名称是否已存在。
+    /// </summary>
+    Task<bool> ExistsCategoryNameAsync(long tenantId, long storeId, string name, long? excludeCategoryId = null, CancellationToken cancellationToken = default);
+
+    /// <summary>
+    /// 统计分类下商品数量。
+    /// </summary>
+    Task<Dictionary<long, int>> CountProductsByCategoryIdsAsync(long tenantId, long storeId, IReadOnlyCollection<long> categoryIds, CancellationToken cancellationToken = default);
+
+    /// <summary>
+    /// 查询商品选择器列表。
+    /// </summary>
+    Task<IReadOnlyList<Product>> SearchPickerAsync(long tenantId, long storeId, long? categoryId, string? keyword, int limit, CancellationToken cancellationToken = default);
+
+    /// <summary>
+    /// 批量更新商品分类。
+    /// </summary>
+    Task<int> BatchUpdateProductCategoryAsync(long tenantId, long storeId, long categoryId, IReadOnlyCollection<long> productIds, CancellationToken cancellationToken = default);
+
+    /// <summary>
+    /// 单商品换绑分类。
+    /// </summary>
+    Task<bool> MoveProductToCategoryAsync(long tenantId, long storeId, long fromCategoryId, long toCategoryId, long productId, CancellationToken cancellationToken = default);
+
     /// <summary>
     /// 获取商品 SKU。
     /// </summary>