Redesign icon + alert system for sidebar tasks, reduce visual noise

<img width="80" height="1696" alt="Image" src="https://github.com/user-attachments/assets/43074338-3289-4130-8163-62bfd0cc8f24" />

It is not clear what needs attention anymore for your tasks in the sidebar. There's too many colours and icons demanding your attention. This needs a clean up pass