feat: Infinite Scrolling Optimization and Swipe-to-Refresh for Notifications Inbox Screen

[HamzaIsrar12]

Description

LEARNER-10364

• Optimized Infinite Scrolling:

  • Checks if more items should be loaded in the LazyList based on visible indices and dynamic item sizes.
  • Triggers loading when visible item indices change or all items fit on the screen.

• Swipe-to-Refresh Implementation:

  • Added pull-to-refresh functionality to the Notifications Inbox screen for seamless updates.
  • On pull-to-refresh, retain existing notifications until new data is fetched successfully. Show an error message toast if the fetch fails.

• UI States and Messages:

  • No error message when unable to fetch notifications count or mark notifications as seen (background operations).
  • Show the empty state when there are no notifications.
  • Show the Network error state when fetching the very first page fails due to network problems.
  • Show the Server error state when fetching the very first page fails due to an issue on the server.
  • On a second-page fetch error, show a circular progress bar at the bottom of the list and an error message toast.
  • On "mark as read" or "mark all as read" failure, show an error message toast.

[omerhabib26]

only a minor nit

[omerhabib26]

Only a minor nit