refactor(hero): 统一击退位移逻辑到MoveSystem

将英雄后退的视图层位移操作迁移到MoveSystem统一处理，
通过knockbackVelocity组件属性实现平滑的击退位移衰减与边界钳制，
移除HeroViewComp中直接操作节点位置的代码，解耦视图与战斗逻辑。

assets/script/game/hero/HeroAtkSystem.ts

@@ -17,6 +17,7 @@ import { mLogger } from "../common/Logger";
 import { SkillTriggerHelper } from "./SkillTriggerHelper";
 import { getMonsterGoldDrop } from "../map/RogueConfig";
 import { MissionEconomy } from "../map/MissionEconomy";
+import { MoveComp } from "./MoveComp";
 
 /** 最终伤害数据接口 
  * 用于封装一次攻击计算的所有结果数据
@@ -194,6 +195,17 @@ export class HeroAtkSystem extends ecs.ComblockSystem implements ecs.ISystemUpda
         if (targetView) {
             targetView.do_atked(damage, isCrit, damageEvent.s_uuid, knockbackExtra);
             targetView.playEnd(skillConf.endAnm);
+
+            // 击退位移下沉到 MoveSystem：直接写入 knockbackVelocity，由 MoveSystem 每帧衰减并叠加位移
+            const moveComp = target.get(MoveComp);
+            if (moveComp) {
+                const dist = FightSet.BACK_RANG + knockbackExtra;
+                const isHero = TAttrsComp.fac === FacSet.HERO;
+                // 击退初速度：0.1 秒时间常数衰减，总位移约等于 dist
+                const knockbackSpeed = dist * 16;
+                moveComp.knockbackVelocity = isHero ? -knockbackSpeed : knockbackSpeed;
+            }
+
             if (isFrost) {
                 TAttrsComp.toFrost();
                 targetView.in_iced(FightSet.FROST_TIME);