更新框架，增加云库搜索模块

Models/CloudProduct/Dtos/GoodsImportItem.cs

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+using Store.Modules.CloudProduct.Entities;
+
+namespace Store.Modules.CloudProduct.Dtos
+{
+	/// <summary>
+	/// 导入项：商品模型 + 原始数据
+	/// </summary>
+	public class GoodsImportItem
+	{
+		public ProductEntity ProductEntity { get; set; } = null!;
+
+		public string RawData { get; set; } = string.Empty;
+	}
+}

Models/CloudProduct/Dtos/GoodsImportResult.cs

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+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace Store.Modules.CloudProduct.Dtos
+{
+	/// <summary>
+	/// 商品导入结果
+	/// </summary>
+	public class GoodsImportResult
+	{
+		/// <summary>
+		/// 成功条数
+		/// </summary>
+		public int Success { get; set; }
+
+		/// <summary>
+		/// 失败条数
+		/// </summary>
+		public int Failed { get; set; }
+
+		/// <summary>
+		/// 总条数
+		/// </summary>
+		public int Total => Success + Failed;
+
+		/// <summary>
+		/// 错误明细
+		/// </summary>
+		public List<string> Errors { get; set; } = new();
+	}
+}

Models/CloudProduct/Dtos/OpenSearchStatusDto.cs

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+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace Store.Modules.CloudProduct.Dtos
+{
+	/// <summary>
+	/// OpenSearch 运行状态
+	/// </summary>
+	public class OpenSearchStatusDto
+	{
+		/// <summary>
+		/// 节点地址
+		/// </summary>
+		public string NodeUrl { get; set; } = string.Empty;
+
+		/// <summary>
+		/// 索引名称
+		/// </summary>
+		public string IndexName { get; set; } = string.Empty;
+
+		/// <summary>
+		/// 是否可连接
+		/// </summary>
+		public bool Connected { get; set; }
+
+		/// <summary>
+		/// 索引是否存在
+		/// </summary>
+		public bool IndexExists { get; set; }
+
+		/// <summary>
+		/// 文档总数（索引不存在时为 -1）
+		/// </summary>
+		public long DocumentCount { get; set; } = -1;
+
+		/// <summary>
+		/// 说明信息
+		/// </summary>
+		public string? Message { get; set; }
+	}
+}

Models/CloudProduct/Dtos/ProductSearchInfo.cs

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+using OpenSearch.Client;
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace Store.Modules.CloudProduct.Dtos
+{
+	/// <summary>
+	/// 商品搜索模型：Id 为主键，Title 用于分词搜索
+	/// </summary>
+	public class ProductSearchInfo
+	{
+		[Number(NumberType.Byte, Name = "platform")]
+		public byte Platform { get; set; }
+
+		[Number(NumberType.Long, Name = "id")]
+		public long Id { get; set; }
+
+		[Text(Name = "title", Analyzer = "ik_max_word", SearchAnalyzer = "ik_smart")]
+		public string Title { get; set; } = string.Empty;
+		[Text(Name = "thumbUrl")]
+		public string? ThumbUrl { get; set; } = string.Empty;
+
+		/// <summary>一级类目ID</summary>
+		[Number(NumberType.Integer, Name = "cat_id_1")]
+		public int? CatId1 { get; set; }
+
+		/// <summary>二级类目ID</summary>
+		[Number(NumberType.Integer, Name = "cat_id_2")]
+		public int? CatId2 { get; set; }
+
+		/// <summary>三级类目ID</summary>
+		[Number(NumberType.Integer, Name = "cat_id_3")]
+		public int? CatId3 { get; set; }
+
+		/// <summary>四级类目ID</summary>
+		[Number(NumberType.Integer, Name = "cat_id_4")]
+		public int? CatId4 { get; set; }
+
+		/// <summary>最低价快照，用于价格区间过滤和按价格排序</summary>
+		[Number(NumberType.Long, Name = "min_price")]
+		public long? MinPrice { get; set; }
+
+		/// <summary>销量，用于按销量排序</summary>
+		[Number(NumberType.Integer, Name = "sold_quantity")]
+		public int SoldQuantity { get; set; }
+
+		public override string ToString() => $"[Id={Id}] Title={Title} Cat=({CatId1},{CatId2},{CatId3},{CatId4}) Price={MinPrice} Sold={SoldQuantity}";
+	}
+	/// <summary>
+	/// 搜索排序方式
+	/// </summary>
+	public enum GoodsSearchSortBy
+	{
+		Relevance = 0,   // 相关性（默认）
+		PriceAsc = 1,    // 价格从低到高
+		PriceDesc = 2,   // 价格从高到低
+		SoldDesc = 3,    // 销量从高到低
+	}
+}

Models/CloudProduct/Dtos/ProductSearchRequest.cs

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+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace Store.Modules.CloudProduct.Dtos
+{
+	/// <summary>
+	/// 商品搜索请求
+	/// </summary>
+	public class ProductSearchRequest
+	{
+		/// <summary>
+		/// 标题（模糊搜索）
+		/// </summary>
+		public string Title { get; set; } = string.Empty;
+
+		/// <summary>
+		/// 最低价格（分）
+		/// </summary>
+		public long? MinPrice { get; set; }
+
+		/// <summary>
+		/// 最高价格（分）
+		/// </summary>
+		public long? MaxPrice { get; set; }
+
+		/// <summary>
+		/// 一级类目ID
+		/// </summary>
+		public int? CatId1 { get; set; }
+
+		/// <summary>
+		/// 二级类目ID
+		/// </summary>
+		public int? CatId2 { get; set; }
+
+		/// <summary>
+		/// 三级类目ID
+		/// </summary>
+		public int? CatId3 { get; set; }
+
+		/// <summary>
+		/// 四级类目ID
+		/// </summary>
+		public int? CatId4 { get; set; }
+
+		/// <summary>
+		/// 最低销量
+		/// </summary>
+		public int? MinSoldQuantity { get; set; }
+
+		/// <summary>
+		/// 最高销量
+		/// </summary>
+		public int? MaxSoldQuantity { get; set; }
+
+		/// <summary>
+		/// 平台类型
+		/// </summary>
+		public byte? Platform { get; set; }
+
+
+		/// <summary>
+		/// 页码（默认1）
+		/// </summary>
+		public int PageIndex { get; set; } = 1;
+
+		/// <summary>
+		/// 每页数量（默认20）
+		/// </summary>
+		public int PageSize { get; set; } = 20;
+
+		/// <summary>
+		/// 排序字段
+		/// </summary>
+		public string SortBy { get; set; } = "CreatedTime";
+
+		/// <summary>
+		/// 排序方式：asc/desc（默认desc）
+		/// </summary>
+		public string SortOrder { get; set; } = "desc";
+	}
+}