feat: different icon for build info, refresh rate selection

[prettyleaf]

This pull request updates the auto-refresh functionality on the status page to use a user-selectable polling interval, replacing the previous manual refresh button. It introduces a dropdown in the header for selecting the auto-refresh rate, persists the selected rate across sessions, and updates the UI to match the new interaction model. The changes also include some visual improvements to the controls.

Auto-refresh interval selection and persistence:

• Replaced the manual refresh button with a dropdown (<select id="rate">) in the header, allowing users to choose the auto-refresh interval. The selected value is saved in localStorage and restored on page load. [1] [2]
• Removed the old manual refresh button and its associated event listener and animation styles, streamlining the UI and code. [1] [2]

UI and accessibility improvements:

• Updated the styling for the new select-based pill control, including focus states and a caret icon, to ensure accessibility and visual clarity. [1] [2]
• Changed the build information button's SVG icon to a new design for improved clarity and modern appearance.