refactor(UI): 优化字段显示逻辑并添加平滑相机移动

将字段显示和隐藏逻辑提取为独立方法
为相机添加位置平滑效果
在游戏重启时重置初始饲料选择状态

scripts/Tools/Managers/GameBusManager.gd

@@ -10,8 +10,10 @@ static func restart(tree: SceneTree):
 	for item in tree.get_nodes_in_group("items"):
 		item.queue_free()
 
+	UIState.hideFields()
 	OutGameStorage.saveInventory()
 	CameraManager.shakeStop()
 	WorldManager.timeRestart()
+	StarterPanel.selectingFeed = true
 
 	UIState.setPanel("Starter")