feat(战斗系统): 扩展为4条战斗线路并调整相关配置

- 将战斗线路从2条扩展为4条，新增LINE3和LINE4
- 修改Monster生成逻辑以支持4条线路
- 更新英雄刘邦的技能配置
- 调整基础攻击技能消耗为0
- 更新地图预制体以包含新增线路

assets/script/game/hero/Mon.ts

@@ -44,8 +44,10 @@ export class Monster extends ecs.Entity {
         var node = instantiate(prefab);
         let LINE1=scene.entityLayer!.node!.getChildByName("LINE1")!;
         let LINE2=scene.entityLayer!.node!.getChildByName("LINE2")!;
+        let LINE3=scene.entityLayer!.node!.getChildByName("LINE3")!;
+        let LINE4=scene.entityLayer!.node!.getChildByName("LINE4")!;
         // 🔥 设置初始 SiblingIndex - 防止溢出
-        const baseLane = lane === 0 ? LINE1 : LINE2;
+        const baseLane = lane === 0 ? LINE1 : lane === 1 ? LINE2 : lane === 2 ? LINE3 : LINE4;
         node.parent = baseLane
         const collider = node.getComponent(BoxCollider2D);
         if (collider) collider.enabled = false; // 先禁用        // 延迟一帧启用碰撞体