fix: 修复 PortfolioService 和 PortfolioNavService 变量命名

- 统一局部变量使用 camelCase（C# 规范）
- 修复 DTO 属性名引用
- NavItem -> NavHistoryItem
- 修复 for 循环变量名

AssetManager.Services/PortfolioFacade.cs

@@ -110,7 +110,19 @@ public class PortfolioFacade : IPortfolioFacade
         
         // 计算信号
         var positions = _databaseService.GetPositionsByPortfolioId(portfolioId);
-        return await _strategyEngine.GenerateSignalAsync(strategy, positions);
+        var signal = await _strategyEngine.CalculateSignalAsync(strategy, positions);
+        
+        return new StrategySignalResponse
+        {
+            Signal = signal.Signal?.ToLower() ?? "hold",
+            Reason = signal.Reason,
+            Actions = signal.PositionSignals?.Select(p => new SignalAction
+            {
+                Symbol = p.Symbol,
+                Action = p.Signal?.ToLower(),
+                Target = (double?)p.TargetWeight
+            }).ToList()
+        };
     }
 
     public async Task<bool> DeletePortfolioAsync(string portfolioId, string userId)

AssetManager.Services/PortfolioNavService.cs

@@ -41,8 +41,8 @@ public class PortfolioNavService : IPortfolioNavService
         }
 
         // 设置默认日期范围（最近30天）
-        var EndDate = request.EndDate ?? DateTime.Today;
+        var endDate = request.EndDate ?? DateTime.Today;
-        var StartDate = request.StartDate ?? endDate.AddDays(-30);
+        var startDate = request.StartDate ?? endDate.AddDays(-30);
 
         // 检查是否有历史数据，没有则自动回填
         var existingCount = await _db.Queryable<PortfolioNavHistory>()
@@ -56,7 +56,7 @@ public class PortfolioNavService : IPortfolioNavService
         }
 
         // 查询净值历史
-        var NavHistory = await _db.Queryable<PortfolioNavHistory>()
+        var navHistory = await _db.Queryable<PortfolioNavHistory>()
             .Where(n => n.PortfolioId == portfolioId)
             .Where(n => n.NavDate >= startDate && n.NavDate <= endDate)
             .OrderBy(n => n.NavDate)
@@ -69,20 +69,20 @@ public class PortfolioNavService : IPortfolioNavService
             {
                 PortfolioId = portfolioId,
                 Currency = portfolio.Currency,
-                NavHistory = new List<NavItem>(),
+                NavHistory = new List<NavHistoryItem>(),
                 Statistics = new NavStatistics()
             };
         }
 
         // 计算统计指标
         var returns = navHistory.Select(n => (double)n.DailyReturn).Where(r => r != 0).ToList();
-        var Statistics = CalculateStatistics(returns, navHistory);
+        var statistics = CalculateStatistics(returns, navHistory);
 
         return new NavHistoryResponse
         {
             PortfolioId = portfolioId,
             Currency = portfolio.Currency,
-            NavHistory = navHistory.Select(n => new NavItem
+            NavHistory = navHistory.Select(n => new NavHistoryItem
             {
                 Date = n.NavDate.ToString("yyyy-MM-dd"),
                 Nav = (double)n.Nav,
@@ -128,7 +128,7 @@ public class PortfolioNavService : IPortfolioNavService
         }
 
         string targetCurrency = portfolio.Currency ?? "CNY";
-        decimal TotalValue = 0;
+        decimal totalValue = 0;
 
         // 计算总市值
         foreach (var pos in positions)
@@ -166,7 +166,7 @@ public class PortfolioNavService : IPortfolioNavService
             .Where(t => t.PortfolioId == portfolioId && t.TransactionTime.Date <= today)
             .ToListAsync();
 
-        decimal TotalCost = 0;
+        decimal totalCost = 0;
         foreach (var tx in transactions)
         {
             if (tx.Type == "buy")
@@ -186,13 +186,13 @@ public class PortfolioNavService : IPortfolioNavService
         }
 
         // 计算净值
-        decimal Nav = totalCost > 0 ? totalValue / totalCost : 1.0m;
+        decimal nav = totalCost > 0 ? totalValue / totalCost : 1.0m;
-        decimal DailyReturn = 0;
+        decimal dailyReturn = 0;
-        decimal CumulativeReturn = totalCost > 0 ? (totalValue - totalCost) / totalCost * 100 : 0;
+        decimal cumulativeReturn = totalCost > 0 ? (totalValue - totalCost) / totalCost * 100 : 0;
 
         if (yesterdayNav != null && yesterdayNav.TotalValue > 0)
         {
-            DailyReturn = (totalValue - yesterdayNav.TotalValue) / yesterdayNav.TotalValue * 100;
+            dailyReturn = (totalValue - yesterdayNav.TotalValue) / yesterdayNav.TotalValue * 100;
         }
 
         // 保存净值记录
@@ -280,8 +280,8 @@ public class PortfolioNavService : IPortfolioNavService
         }
 
         // 确定起始日期（最早交易日期）
-        var StartDate = transactions.Min(t => t.TransactionTime).Date;
+        var startDate = transactions.Min(t => t.TransactionTime).Date;
-        var EndDate = DateTime.Today;
+        var endDate = DateTime.Today;
         string targetCurrency = portfolio.Currency ?? "CNY";
 
         _logger.LogInformation("开始回填净值历史: {PortfolioId}, 日期范围: {StartDate} ~ {EndDate}",
@@ -302,10 +302,10 @@ public class PortfolioNavService : IPortfolioNavService
         decimal cumulativeCost = 0;
 
         // 记录创建数量
-        int RecordsCreated = 0;
+        int recordsCreated = 0;
 
         // 遍历每个交易日
-        for (var Date = startDate; date <= endDate; Date = date.AddDays(1))
+        for (var date = startDate; date <= endDate; date = date.AddDays(1))
         {
             // 检查是否已存在该日期的净值记录（非强制模式）
             if (!force)
@@ -372,7 +372,7 @@ public class PortfolioNavService : IPortfolioNavService
             if (!holdings.Any()) continue;
 
             // 计算当日市值
-            decimal TotalValue = 0;
+            decimal totalValue = 0;
             bool hasValidPrice = true;
             List<string> failedSymbols = new List<string>();
             
@@ -402,8 +402,8 @@ public class PortfolioNavService : IPortfolioNavService
             }
 
             // 计算净值
-            decimal Nav = cumulativeCost > 0 ? totalValue / cumulativeCost : 1.0m;
+            decimal nav = cumulativeCost > 0 ? totalValue / cumulativeCost : 1.0m;
-            decimal CumulativeReturn = cumulativeCost > 0 ? (totalValue - cumulativeCost) / cumulativeCost * 100 : 0;
+            decimal cumulativeReturn = cumulativeCost > 0 ? (totalValue - cumulativeCost) / cumulativeCost * 100 : 0;
 
             // 获取昨日净值以计算日收益率
             var yesterdayNav = await _db.Queryable<PortfolioNavHistory>()
@@ -411,10 +411,10 @@ public class PortfolioNavService : IPortfolioNavService
                 .OrderByDescending(n => n.NavDate)
                 .FirstAsync();
 
-            decimal DailyReturn = 0;
+            decimal dailyReturn = 0;
             if (yesterdayNav != null && yesterdayNav.TotalValue > 0)
             {
-                DailyReturn = (totalValue - yesterdayNav.TotalValue) / yesterdayNav.TotalValue * 100;
+                dailyReturn = (totalValue - yesterdayNav.TotalValue) / yesterdayNav.TotalValue * 100;
             }
 
             // 保存净值记录
@@ -536,33 +536,33 @@ public class PortfolioNavService : IPortfolioNavService
     {
         if (!history.Any()) return new NavStatistics();
 
-        var MaxReturn = returns.Any() ? returns.Max() : 0;
+        var maxReturn = returns.Any() ? returns.Max() : 0;
-        var MinReturn = returns.Any() ? returns.Min() : 0;
+        var minReturn = returns.Any() ? returns.Min() : 0;
 
         // 计算最大回撤
-        double MaxDrawdown = 0;
+        double maxDrawdown = 0;
         double peak = 1.0;
         foreach (var item in history.OrderBy(h => h.NavDate))
         {
-            var Nav = (double)item.Nav;
+            var nav = (double)item.Nav;
             if (nav > peak) peak = nav;
             var drawdown = (peak - nav) / peak * 100;
-            if (drawdown > maxDrawdown) MaxDrawdown = drawdown;
+            if (drawdown > maxDrawdown) maxDrawdown = drawdown;
         }
 
         // 计算夏普比率（简化版，假设无风险利率=3%年化）
-        double SharpeRatio = 0;
+        double sharpeRatio = 0;
-        double Volatility = 0;
+        double volatility = 0;
         if (returns.Any())
         {
             var avgReturn = returns.Average();
             var stdDev = Math.Sqrt(returns.Sum(r => Math.Pow(r - avgReturn, 2)) / returns.Count);
-            Volatility = stdDev * Math.Sqrt(252); // 年化波动率
+            volatility = stdDev * Math.Sqrt(252); // 年化波动率
-            SharpeRatio = stdDev > 0 ? (avgReturn * 252 - 3) / (stdDev * Math.Sqrt(252)) : 0;
+            sharpeRatio = stdDev > 0 ? (avgReturn * 252 - 3) / (stdDev * Math.Sqrt(252)) : 0;
         }
 
         // 总收益率
-        var TotalReturn = history.Any() 
+        var totalReturn = history.Any() 
             ? (double)(history.Last().CumulativeReturn) 
             : 0;
 

AssetManager.Services/PortfolioService.cs

@@ -159,7 +159,7 @@ public class PortfolioService : IPortfolioService
         return new CreatePortfolioResponse
         {
             Id = portfolio.Id,
-            totalValue = (double)portfolio.TotalValue,
+            TotalValue = (double)portfolio.TotalValue,
             ReturnRate = 0,
             Currency = portfolio.Currency,
             CreatedAt = portfolio.CreatedAt.ToString("yyyy-MM-dd HH:mm:ss")
@@ -266,11 +266,11 @@ public class PortfolioService : IPortfolioService
 
         return new TotalAssetsResponse
         {
-            totalValue = (double)totalValueInTargetCurrency,
+            TotalValue = (double)totalValueInTargetCurrency,
             Currency = targetCurrency,
             TodayProfit = (double)totalTodayProfitInTargetCurrency,
             TodayProfitCurrency = targetCurrency,
-            totalReturnRate = Math.Round(totalReturnRate, 2)
+            TotalReturnRate = Math.Round(totalReturnRate, 2)
         };
     }
 
@@ -350,7 +350,7 @@ public class PortfolioService : IPortfolioService
                 Amount = (int)pos.Shares,
                 AveragePrice = (double)pos.AvgPrice,
                 CurrentPrice = (double)currentPrice,
-                totalValue = (double)positionValueInTarget,
+                TotalValue = (double)positionValueInTarget,
                 Profit = (double)(positionValueInTarget - costInTarget),
                 ProfitRate = profitRate,
                 ChangeAmount = (double)todayProfitInTarget,
@@ -379,7 +379,7 @@ public class PortfolioService : IPortfolioService
             {
                 Id = portfolio.StrategyId,
                 Name = "策略名称",
-                description = "策略描述"
+                Description = "策略描述"
             },
             PortfolioValue = (double)totalPortfolioValue,
             TotalReturn = (double)totalReturn,
@@ -427,7 +427,7 @@ public class PortfolioService : IPortfolioService
 
         return new GetTransactionsResponse
         {
-            items = transactions.Select(t => new TransactionItem
+            Items = transactions.Select(t => new TransactionItem
             {
                 Id = t.Id,
                 PortfolioId = t.PortfolioId,
@@ -441,9 +441,9 @@ public class PortfolioService : IPortfolioService
                 Status = t.Status,
                 Remark = t.Remark
             }).ToList(),
-            total = total,
+            Total = total,
-            page = offset / limit + 1,
+            Page = offset / limit + 1,
-            pageSize = limit
+            PageSize = limit
         };
     }