refactor(wave): 重构波次生成逻辑以支持多人游戏

将波次生成逻辑拆分为数据准备和实体生成两个阶段，便于多人游戏同步
修改 Wave 类以支持实例数据复制
更新相关调用点使用新的波次生成方式

scripts/Contents/Panels/MakeFeed.gd

@@ -50,7 +50,7 @@ func updateValue():
 	countLabel.text = str(UIState.player.fields[FieldStore.Entity.FEED_COUNT_CAN_MADE] - selectedCount)
 	needBB.count = refreshNeedBaseballCount
 func finish():
-	Wave.next()
+	WorldManager.rootNode.spawnWave()
 	UIState.closeCurrentPanel()
 func regenerateCards():
 	updateValue()

scripts/Contents/Panels/Starter.gd

@@ -54,16 +54,16 @@ func rebuildAllPlayers(playerNames: Array[String]):
 @rpc("any_peer")
 func startMultiplayerGame():
 	MultiplayerState.isMultiplayer = true
-	WorldManager.rootNode.multiplayer.multiplayer_peer = MultiplayerState.connection
 	MultiplayerState.playerName = playerNameInput.text
 	MultiplayerState.connection = multiplayer.multiplayer_peer
+	WorldManager.rootNode.multiplayer.multiplayer_peer = multiplayer.multiplayer_peer
 	for i in getPlayerNames():
 		EntityBase.generatePlayer(i)
 	UIState.closeCurrentPanel()
 func startSingleplayerGame():
 	MultiplayerState.isMultiplayer = false
 	EntityBase.generatePlayer(playerNameInput.text)
-	Wave.next()
+	WorldManager.rootNode.spawnWave()
 	UIState.closeCurrentPanel()
 
 func _ready():