```

fix(fight_tower): 修复战斗塔Boss获取逻辑错误

- 修改条件判断从检查boss不为nil改为检查boss[0].BossIds长度不为0
- 修正PetTawor方法中索引越界问题，从boss[0]改为boss[1]
- 在TowerService.Boss方法中添加按tower_level升序排序确保数据一致性
```

logic/controller/fight_塔.go

@@ -81,7 +81,7 @@ func (h Controller) FreshChoiceFightLevel(data *fight.C2S_FRESH_CHOICE_FIGHT_LEV
 		//next := service.NewTower600Service().Boss(c.Info.CurrentFreshStage + 1)
 
 	}
-	if boss != nil {
+	if len(boss[0].BossIds) != 0 {
 		//单节点,取获取到的一个,然后因为不是剧情,所以只有一层
 		r := service.NewBossService().Get(boss[0].BossIds[0])
 		for _, v := range r {
@@ -131,7 +131,7 @@ func (h Controller) PetTawor(data *fight.StartTwarInboundInfo, c *player.Player)
 
 	}
 	if len(boss) > 1 {
-		r := service.NewBossService().Get(boss[0].BossIds[0])
+		r := service.NewBossService().Get(boss[1].BossIds[0])
 		for _, v := range r {
 			result.BossID = append(result.BossID, uint32(v.MonID))
 		}