refactor(skill): 重构技能触发逻辑，提取统一工具类

将分散在Hero、Mon、HeroAtkSystem、SCastSystem、MissionComp中的技能触发代码统一封装，集中处理触发次数加成、实体合法性校验与技能事件派发，同时新增SkillTriggerType枚举统一管理技能触发类型，简化业务调用并消除重复模板代码。

assets/script/game/hero/SCastSystem.ts

@@ -9,7 +9,8 @@ import { HeroDisVal, HeroInfo, HType } from "../common/config/heroSet";
 import { Attrs } from "../common/config/HeroAttrs";
 import { BoxSet, FacSet, FightSet } from "../common/config/GameSet";
 import { oops } from "db://oops-framework/core/Oops";
-import { GameEvent } from "../common/config/GameEvent";
+import { GameEvent, SkillTriggerType } from "../common/config/GameEvent";
+import { SkillTriggerHelper } from "./SkillTriggerHelper";
 
 /**
  * ==================== 自动施法系统 ====================
@@ -338,18 +339,7 @@ export class SCastSystem extends ecs.ComblockSystem implements ecs.ISystemUpdate
 
     /** 检查并触发攻击附加技能 (atking) */
     private checkAndTriggerAtkingSkills(heroAttrs: HeroAttrsComp, heroView: HeroViewComp) {
-        if (!heroAttrs.atking || heroAttrs.atking.length === 0) return;
-
-        heroAttrs.atking.forEach(atkConfig => {
-            if (heroAttrs.atk_count > 0 && heroAttrs.atk_count % atkConfig.t_num === 0) {
-                oops.message.dispatchEvent(GameEvent.TriggerSkill, {
-                    s_uuid: atkConfig.s_uuid,
-                    heroAttrs: heroAttrs,
-                    heroView: heroView,
-                    triggerType: 'atking'
-                });
-            }
-        });
+        SkillTriggerHelper.trigger(SkillTriggerType.Atking, heroAttrs, heroView);
     }
 
     private resolveRepeatCastTargetPos(targetPos: Vec3 | null, castIndex: number): Vec3 | null {