feat(渲染): 重构渲染层级管理并添加BOSS层级

移除动态渲染层级更新逻辑，改为在实体加载时设置固定层级
- 在Hero和Monster的load方法中设置初始siblingIndex
- 添加BOSS枚举值到IndexSet
- 为Monster添加溢出保护，防止层级索引过大
- 删除墓地位置判断等不再需要的逻辑

assets/script/game/hero/Mon.ts

@@ -2,7 +2,7 @@ import { instantiate, Node, Prefab, Vec3 ,v3,resources,SpriteFrame,Sprite,Sprite
 import { oops } from "../../../../extensions/oops-plugin-framework/assets/core/Oops";
 import { ecs } from "../../../../extensions/oops-plugin-framework/assets/libs/ecs/ECS";
 import { smc } from "../common/SingletonModuleComp";
-import { BoxSet, FacSet } from "../common/config/GameSet";
+import { BoxSet, FacSet, IndexSet } from "../common/config/GameSet";
 import { HeroInfo } from "../common/config/heroSet";
 import { HeroAttrsComp } from "./HeroAttrsComp";
 import { BuffConf, SkillSet } from "../common/config/SkillSet";
@@ -47,6 +47,12 @@ export class Monster extends ecs.Entity {
         if (collider) collider.enabled = false; // 先禁用        // 延迟一帧启用碰撞体
         node.setPosition(pos)
 
+        // 🔥 设置初始 SiblingIndex - 防止溢出
+        const baseLane = lane === 0 ? IndexSet.MON1 : IndexSet.MON2;
+        // 使用模运算防止索引溢出，确保在安全范围内循环
+        const safeSpawnOrder = spawnOrder % 999; // 限制在999以内，避免溢出到其他层级
+        const initialSiblingIndex = baseLane + safeSpawnOrder;
+        node.setSiblingIndex(initialSiblingIndex);
 
         var view = node.getComponent(HeroViewComp)!;
         const model = this.get(HeroAttrsComp);