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/CameraManager.gd

@@ -17,7 +17,6 @@ func _physics_process(_delta):
 	if is_instance_valid(UIState.player):
 		position = UIState.player.position + constantOffset
 		position += MathTool.sampleInCircle(shakeIntensity)
-		offset += ((get_global_mouse_position() - UIState.player.position).clampf(-100, 100) - offset) * 0.15
 
 static func shake(millseconds: float, intensity: float = 10, steper: Callable = func(currentValue, _totalValue, _restPercent): return currentValue):
 	if StarterPanel.buildingShader: return