Reload on Scroll

Description
The application currently does not reload content when the user scrolls down. Implementing a reload on scroll-down functionality can improve the user experience by ensuring updated and dynamic content is displayed.

Expected Behavior:
When the user scrolls down to the top of the page, the application should trigger a refresh or reload to display the latest content.

Describe the solution you'd like

Implement a "pull-to-refresh" mechanism where scrolling down from the top triggers a reload.
Add a visual indicator (e.g., a spinner or progress bar) to show the reload action is occurring.

未指定文件、测试或入口点。首先定位页面的滚动处理和重新加载入口，然后确定应用如何表示加载指示器。完成的标准是从顶部向下拉动会刷新当前内容，并在重新加载期间显示可见的 spinner 或进度条。

由索引模型根据 Issue 内容生成。