feat: 增加尊享包商品及折扣逻辑，完善VIP与尊享包相关接口和数据返回

- 新增尊享包商品类型，支持 5000W 和 10000W Tokens
- 增加尊享包折扣计算与折扣后价格获取方法
- PayService 新增获取商品列表接口，支持尊享包折扣展示
- PayManager 支持尊享包订单金额按折扣计算，并新增获取用户累计充值金额方法
- OpenApiService Anthropic接口增加VIP与尊享包用量校验
- AiGateWayManager 增加尊享包Token扣减逻辑
- AiAccountService 返回用户VIP状态、到期时间及尊享包Token统计信息

Yi.Abp.Net8/module/ai-hub/Yi.Framework.AiHub.Application/Services/PayService.cs

@@ -14,6 +14,7 @@ using Yi.Framework.AiHub.Domain.Entities.Pay;
 using Yi.Framework.SqlSugarCore.Abstractions;
 using System.ComponentModel;
 using System.Reflection;
+using Volo.Abp.Users;
 using Yi.Framework.AiHub.Application.Contracts.Dtos.Recharge;
 
 namespace Yi.Framework.AiHub.Application.Services;
@@ -185,6 +186,85 @@ public class PayService : ApplicationService, IPayService
         };
     }
 
+    /// <summary>
+    /// 获取商品列表
+    /// </summary>
+    /// <returns>商品列表</returns>
+    [HttpGet("pay/GoodsList")]
+    public async Task<List<GoodsListOutput>> GetGoodsListAsync()
+    {
+        var goodsList = new List<GoodsListOutput>();
+
+        // 获取当前用户的累加充值金额（仅已登录用户）
+        decimal totalRechargeAmount = 0m;
+        if (CurrentUser.IsAuthenticated)
+        {
+            totalRechargeAmount = await _payManager.GetUserTotalRechargeAmountAsync(CurrentUser.GetId());
+        }
+
+        // 遍历所有商品枚举
+        foreach (GoodsTypeEnum goodsType in Enum.GetValues(typeof(GoodsTypeEnum)))
+        {
+            var originalPrice = goodsType.GetTotalAmount();
+            decimal actualPrice = originalPrice;
+            decimal? discountAmount = null;
+            string? discountDescription = null;
+
+            // 如果是尊享包商品，计算折扣
+            if (goodsType.IsPremiumPackage() && CurrentUser.IsAuthenticated)
+            {
+                discountAmount = goodsType.CalculateDiscount(totalRechargeAmount);
+                actualPrice = goodsType.GetDiscountedPrice(totalRechargeAmount);
+
+                if (discountAmount > 0)
+                {
+                    discountDescription = $"已优惠 ¥{discountAmount:F2}（累计充值每10元减1元，最多减20元）";
+                }
+                else
+                {
+                    discountDescription = "累计充值每10元可减1元，最多减20元";
+                }
+            }
+
+            var goodsItem = new GoodsListOutput
+            {
+                GoodsName = goodsType.GetDisplayName(),
+                OriginalPrice = originalPrice,
+                GoodsPrice = actualPrice,
+                GoodsType = goodsType,
+                Remark = GetGoodsRemark(goodsType),
+                DiscountAmount = discountAmount,
+                DiscountDescription = discountDescription
+            };
+
+            goodsList.Add(goodsItem);
+        }
+
+        return goodsList;
+    }
+
+    /// <summary>
+    /// 获取商品备注信息
+    /// </summary>
+    /// <param name="goodsType">商品类型</param>
+    /// <returns>商品备注</returns>
+    private string GetGoodsRemark(GoodsTypeEnum goodsType)
+    {
+        if (goodsType.IsPremiumPackage())
+        {
+            var tokenAmount = goodsType.GetTokenAmount();
+            return $"尊享包服务，提供 {tokenAmount:N0} Tokens（需要VIP资格）";
+        }
+        else if (goodsType.IsVipService())
+        {
+            var validMonths = goodsType.GetValidMonths();
+            var monthlyPrice = goodsType.GetMonthlyPrice();
+            return $"VIP服务，有效期 {validMonths} 个月，月均价 ¥{monthlyPrice:F2}";
+        }
+
+        return "未知商品类型";
+    }
+
     /// <summary>
     /// 获取交易状态描述
     /// </summary>