refactor(策略): 将标签存储格式从JSON数组改为逗号分隔字符串

修改策略标签的存储格式，从JSON数组序列化改为简单的逗号分隔字符串，简化数据存储和处理逻辑。同时更新相关控制器和服务层的代码以适应这一变更。

AssetManager.API/Controllers/StrategyController.cs

@@ -35,7 +35,8 @@ public class StrategyController : ControllerBase
         {
             try
             {
-                tags = System.Text.Json.JsonSerializer.Deserialize<List<string>>(strategy.Tags);
+                // 尝试按逗号分割字符串
+                tags = strategy.Tags.Split(new[] { ',' }, StringSplitOptions.RemoveEmptyEntries).ToList();
             }
             catch { }
         }

AssetManager.Data/Strategy.cs

@@ -39,9 +39,9 @@ public class Strategy
     public string Description { get; set; }
     
     /// <summary>
-    /// 策略标签 (JSON数组)
+    /// 策略标签 (逗号分隔的字符串)
     /// </summary>
-    [SugarColumn(ColumnName = "tags", IsJson = true)]
+    [SugarColumn(ColumnName = "tags")]
     public string Tags { get; set; }
     
     /// <summary>

AssetManager.Services/StrategyService.cs

@@ -22,9 +22,9 @@ public class StrategyService : IStrategyService
             Alias = request.name,
             Type = request.type,
             Description = request.description,
-            Tags = System.Text.Json.JsonSerializer.Serialize(request.tags),
+            Tags = request.tags != null ? string.Join(",", request.tags) : null,
             RiskLevel = request.riskLevel,
-            Config = System.Text.Json.JsonSerializer.Serialize(request.parameters),
+            Config = request.parameters != null ? System.Text.Json.JsonSerializer.Serialize(request.parameters) : null,
             CreatedAt = DateTime.Now,
             UpdatedAt = DateTime.Now
         };
@@ -61,9 +61,9 @@ public class StrategyService : IStrategyService
         strategy.Alias = request.name;
         strategy.Type = request.type;
         strategy.Description = request.description;
-        strategy.Tags = System.Text.Json.JsonSerializer.Serialize(request.tags);
+        strategy.Tags = request.tags != null ? string.Join(",", request.tags) : null;
         strategy.RiskLevel = request.riskLevel;
-        strategy.Config = System.Text.Json.JsonSerializer.Serialize(request.parameters);
+        strategy.Config = request.parameters != null ? System.Text.Json.JsonSerializer.Serialize(request.parameters) : null;
         strategy.UpdatedAt = DateTime.Now;
 
         _db.Updateable(strategy).ExecuteCommand();