原子组件-上传组件-多个配置项 配置有问题

## **Describe the bug (required)** / **详细描述 bug（必填）**

原子组件-上传组件，多个配置项 配置有问题，无法正常使用

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## **To Reproduce (required)** / **如何复现 bug？（必填，非常重要）**

Steps to reproduce the behavior: / 详细复现步骤：

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1、原子组件-上传组件 拖动到 编辑区
2、标题和标题位置 2个配置项用的 一个 变量 字段切 未达到 设置的效果
3、想把上传组件换成按钮的样子，点击按钮形状-默认，组件不能正常渲染
4、对应的其他上传钩子函数也没有 无法完成正常的 上传功能

感觉此组件问题较多，麻烦尽快处理一下吧


Start by reproducing the upload component in the editor using the listed configuration steps and inspect the component's configuration and upload-hook entry points. Check why separate title and title-position variables do not take effect, why the default button shape fails to render, and why the other upload hooks are unavailable. Done means these configurations render correctly and the upload flow can be completed.

Written by the indexing model from the issue text.