fix: 修复Boss渲染层级错误，确保Boss始终显示在最前

Boss单位在渲染排序时未获得足够高的优先级，导致可能被其他单位遮挡。
现在为Boss单位添加专门的渲染优先级字段（bossPriority），并在排序时作为第一排序条件。
同时为Boss的spawnOrder添加偏移量，确保同优先级内Boss保持正确的生成顺序。

assets/script/game/map/MissionMonComp.ts

@@ -9,12 +9,14 @@ import { GameEvent } from "../common/config/GameEvent";
 import {BoxSet } from "../common/config/GameSet";
 import { BossList, BossSpawnCd, MonList, MonType, SpawnBaseCd, SpawnMinCd, SpawnPowerBias, SpawnStageReduce, StageBossGrow, StageDuration, StageGrow, UpType } from "./RogueConfig";
 import { HeroAttrsComp } from "../hero/HeroAttrsComp";
+import { MoveComp } from "../hero/MoveComp";
 const { ccclass, property } = _decorator;
 
 /** 视图层对象 */
 @ccclass('MissionMonCompComp')
 @ecs.register('MissionMonComp', false)
 export class MissionMonCompComp extends CCComp {
+    private static readonly BOSS_RENDER_PRIORITY = 1000000;
     @property({ tooltip: "是否启用调试日志" })
     private debugMode: boolean = false;
     
@@ -201,8 +203,13 @@ export class MissionMonCompComp extends CCComp {
         // 递增全局生成顺序，做溢出保护
         this.globalSpawnOrder = (this.globalSpawnOrder + 1) % 999; 
         
-        // 先用原始配置创建怪物，再覆盖成长后属性
         mon.load(pos, scale, uuid, isBoss);
+        const move = mon.get(MoveComp);
+        if (move) {
+            move.spawnOrder = isBoss
+                ? MissionMonCompComp.BOSS_RENDER_PRIORITY + this.globalSpawnOrder
+                : this.globalSpawnOrder;
+        }
         const model = mon.get(HeroAttrsComp);
         const base = HeroInfo[uuid];
         if (!model || !base) return;