fix: 调整英雄和怪物的初始X坐标位置

将英雄初始位置X坐标从-360改为-320，怪物初始位置X坐标从360改为320，使双方起始位置更对称。
移除怪物生成时的横向错列计算，统一使用新的初始X坐标，简化生成逻辑。

assets/script/game/common/config/heroSet.ts

@@ -43,7 +43,7 @@ export const getMonList = ()=>{
 }
 
 export const HeroPos={
-    0:{pos:v3(-360,BoxSet.GAME_LINE,0)},
+    0:{pos:v3(-320,BoxSet.GAME_LINE,0)},
     1:{pos:v3(0,BoxSet.GAME_LINE,0)},
     2:{pos:v3(0,BoxSet.GAME_LINE,0)},
 }
@@ -86,7 +86,7 @@ export enum MonStart {
     SLINE_2=100,     //下线y
     SLINE_3=180,      //下线y
     SLINE_4=60,     //y起始点
-    START_X=360,    //x起始点
+    START_X=320,    //x起始点
     START_I=90,  //x轴间隔
 }
 

assets/script/game/map/MissionMonComp.ts

@@ -195,11 +195,7 @@ export class MissionMonCompComp extends CCComp {
         let mon = ecs.getEntity<Monster>(Monster);
         let scale = -1;
         // 按生成序号做横向错列，减轻重叠感
-        const x = MonStart.START_X + Math.floor(i / 4) * MonStart.START_I;
-        let y = BoxSet.GAME_LINE;
-
-        let pos: Vec3 = v3(x, y, 0);
-        
+        let pos: Vec3 = v3(MonStart.START_X, BoxSet.GAME_LINE, 0);
         // 递增全局生成顺序，做溢出保护
         this.globalSpawnOrder = (this.globalSpawnOrder + 1) % 999;