feat: 重构任务奖励系统并增加宠物技能和皮肤奖励

将任务奖励逻辑重构到单独的文件中，增加对宠物技能和皮肤奖励的支持，优化任务完成处理流程

logic/controller/fight_boss野怪和地图怪.go

@@ -43,7 +43,7 @@ func (Controller) PlayerFightBoss(req *ChallengeBossInboundInfo, p *player.Playe
 	}
 
 	p.Fightinfo.Status = fightinfo.BattleMode.FIGHT_WITH_NPC
-	p.Fightinfo.Mode = fightinfo.BattleMode.MULTI_MODE
+	p.Fightinfo.Mode = resolveMapNodeFightMode(mapNode)
 
 	ai := player.NewAI_player(monsterInfo)
 	ai.CanCapture = resolveBossCaptureRate(bossConfigs[0].IsCapture, leadMonsterID)
@@ -76,12 +76,23 @@ func startMapBossFight(
 	oppPets := ai.GetPetInfo(0)
 	if mapNode != nil && mapNode.IsGroupBoss != 0 {
 		if len(ourPets) > 0 && len(oppPets) > 0 {
-			return fight.NewLegacyGroupFightSingleController(p, ai, ourPets, oppPets, groupBossSlotLimit, fn)
+			slotLimit := groupBossSlotLimit
+			if mapNode.PkFlag != 0 {
+				slotLimit = 1
+			}
+			return fight.NewLegacyGroupFightSingleController(p, ai, ourPets, oppPets, slotLimit, fn)
 		}
 	}
 	return fight.NewFight(p, ai, ourPets, oppPets, fn)
 }
 
+func resolveMapNodeFightMode(mapNode *configmodel.MapNode) uint32 {
+	if mapNode != nil && mapNode.PkFlag != 0 {
+		return fightinfo.BattleMode.SINGLE_MODE
+	}
+	return fightinfo.BattleMode.MULTI_MODE
+}
+
 // OnPlayerFightNpcMonster 战斗野怪
 func (Controller) OnPlayerFightNpcMonster(req *FightNpcMonsterInboundInfo, p *player.Player) (result *fight.NullOutboundInfo, err errorcode.ErrorCode) {
 	if err = p.CanFight(); err != 0 {