fix: fan_stacking验证 + OnEliminate传播 + TurnOrder读DSL

子代理审查(DSL+Core)发现26个问题,本轮修复3个:
1. fan_stacking值验证: 非法值→警告(之前静默以add计算)
2. OnEliminate传播: BuildPhases补映射(PhaseConfig已有属性)
3. TurnOrder读DSL: 之前硬编码counter_clockwise,现读YAML

REVIEW_REPORT.md: 子代理审查完整报告(保留作为参考)

RuleEngine/Dsl/DslLoader.cs

@@ -109,6 +109,11 @@ public class CapabilityRegistry
                 warnings.Add($"pre_hook「{h.Name}」引擎未实现→{h.Description}");
         }
 
+        // fan_stacking 值验证
+        var validStackings = new HashSet<string> { "add", "add_max", "max_level" };
+        if (!validStackings.Contains(rules.FanStacking))
+            warnings.Add($"fan_stacking={rules.FanStacking} 非法→仅支持 add/add_max/max_level→已按add计算");
+
         // Scoring mode
         if (rules.Scoring.Mode != "fan_table")
             warnings.Add($"scoring.mode={rules.Scoring.Mode} 引擎仅支持fan_table→忽略");

RuleEngine/MahjongRoom.cs

@@ -99,8 +99,9 @@ public class MahjongRoom
             Type = p.Type,
             Action = p.Action ?? "",
             Next = p.Next,
-            TurnOrder = "counter_clockwise",
+            TurnOrder = p.TurnOrder ?? "counter_clockwise",
             ParallelElimination = p.ParallelElimination,
+            OnEliminate = p.OnEliminate,
             SelfActions = p.SubPhases?.SelfAction?.Options?.Select(o => new ActionOption
             {
                 Action = o.Action, Priority = o.Priority, Condition = o.Condition