```

feat(broadcast): 添加全服广播功能并完善相关逻辑

新增 Broadcast 结构体及 Server 的 Broadcast 方法，用于实现全服广播消息，
并在 RPC 客户端中增加对应接口。同时在 fight 模块中添加聊天信息结构体和处理逻辑。

refactor(pet_skill): 优化宠物技能设置逻辑

修复宠物技能替换判断条件错误的问题，并调整相关逻辑顺序以提高代码可读性与健壮性。

feat(chat): 实现战斗内聊天功能

新增战斗中的聊天指令结构体 ChatInfo 和对应的控制器方法 FightChat，
支持玩家在战斗中发送聊天消息。

refactor(item_buy): 调整金币购买道具的扣费方式

将原直接比较金币数量改为调用

logic/controller/fight_base.go

@@ -84,3 +84,12 @@ func (h Controller) UsePetItemInboundInfo(data *fight.UsePetItemInboundInfo, c *
 
 	return nil, -1
 }
+func (h Controller) FightChat(data *fight.ChatInfo, c *player.Player) (result *fight.NullOutboundInfo, err errorcode.ErrorCode) {
+	if c.FightC == nil {
+		return nil, errorcode.ErrorCodes.ErrBattleEnded
+	}
+
+	c.FightC.Chat(c, data.Message)
+
+	return nil, -1
+}

logic/controller/item_buy.go

@@ -58,7 +58,7 @@ func (h Controller) BuyMItem(data *item.BuyMultiInboundInfo, c *player.Player) (
 func (h Controller) BuyGoldItem(data *item.C2S_GOLD_BUY_PRODUCT, c *player.Player) (result *item.S2C_GoldBuyProductInfo, err errorcode.ErrorCode) {
 	r := xmlres.GoldProductMap[int(data.ProductID)]
 
-	if uint32(data.Count)*uint32(gconv.Uint32(r.Price)) > c.Info.GoldBean {
+	if !c.UseGold(uint32(data.Count) * uint32(gconv.Uint32(r.Price))) {
 		return nil, errorcode.ErrorCodes.ErrSystemError
 	}
 	c.ItemAdd(model.ItemInfo{ItemId: uint32(gconv.Uint32(r.ItemID)), ItemCnt: uint32(data.Count)})
@@ -69,6 +69,7 @@ func (h Controller) BuyGoldItem(data *item.C2S_GOLD_BUY_PRODUCT, c *player.Playe
 		PayGold:  uint32(data.Count) * uint32(gconv.Uint32(r.Price)),
 		Reserved: 0,
 	}
+
 	return
 
 }

logic/controller/pet_skill.go

@@ -16,17 +16,16 @@ func (h Controller) SetPetSkill(data *pet.ChangeSkillInfo, c *player.Player) (re
 	}
 
 	_, onpet, ok := c.FindPet(data.CatchTime)
-	if ok {
-		_, HasSkill, ok := utils.FindWithIndex(onpet.SkillList, func(item model.SkillInfo) bool { //已经存在技能
-			return item.ID == data.ReplaceSkill
-		})
-		if !ok {
-			HasSkill.ID = data.ReplaceSkill
-			HasSkill.PP = uint32(xmlres.SkillMap[int(HasSkill.ID)].MaxPP)
-		}
-
+	if !ok {
+		return result, errorcode.ErrorCodes.ErrSystemBusy
+	}
+	_, HasSkill, ok := utils.FindWithIndex(onpet.SkillList, func(item model.SkillInfo) bool { //已经存在技能
+		return item.ID == data.HasSkill
+	})
+	if !ok {
+		HasSkill.ID = data.ReplaceSkill
+		HasSkill.PP = uint32(xmlres.SkillMap[int(HasSkill.ID)].MaxPP)
 	}
-
 	return &pet.ChangeSkillOutInfo{
 		CatchTime: data.CatchTime,
 	}, 0

logic/controller/user.go

@@ -2,6 +2,7 @@ package controller
 
 import (
 	"blazing/common/socket/errorcode"
+	"blazing/common/utils"
 	"blazing/cool"
 	"blazing/logic/service/item"
 	"blazing/logic/service/player"
@@ -51,7 +52,7 @@ func (h Controller) Chat(data *user.ChatInboundInfo, c *player.Player) (result *
 
 	result = &user.ChatOutboundInfo{
 
-		Message:        string([]byte(data.Message)[:data.MessageLen-1]),
+		Message:        utils.RemoveLast(data.Message),
 		SenderNickname: c.Info.Nick,
 		SenderId:       c.Info.UserID,
 	}