```

fix(player): 修复金币兑换计算逻辑错误

移除未使用的getgold变量计算，修正兑换金币数量计算公式，
避免因变量未定义导致的潜在运行时错误，确保兑换功能正常工作。
```

modules/player/controller/admin/gold_list.go

@@ -44,7 +44,7 @@ func (c *GoldListController) DuihuanGold(ctx context.Context, req *DuihuanGoldAd
 	}
 
 	costfree := r.Rate * float64(r.ExchangeNum)
-	getgold := 1 / r.Rate * float64(r.ExchangeNum)
+
 	if base.NewBaseSysUserService().GetFreeGold(t.UserId) < int64(costfree*100) {
 		err = fmt.Errorf("余额不足")
 		return
@@ -54,7 +54,7 @@ func (c *GoldListController) DuihuanGold(ctx context.Context, req *DuihuanGoldAd
 		return
 	}
 	base.NewBaseSysUserService().DuihuanFreeGold(uint32(r.PlayerID), int64(r.ExchangeNum*100), int64(costfree*95))
-	base.NewBaseSysUserService().DuihuanGold(uint32(t.UserId), int64(getgold*95), int64(costfree*100))
+	base.NewBaseSysUserService().DuihuanGold(uint32(t.UserId), int64(r.ExchangeNum*95), int64(costfree*100))
 	res = cool.Ok(nil)
 	return
 }