PLEASE NOTE THAT THIS DIFF AND SUBSEQUENT DIFFS IN THIS STACK WILL NOT BE LANDED UNTIL MORE OF THE REDESIGN IS READY SINCE THIS WILL CAUSE REGRESSIONS IN PROD
This diff updates the calendar ui to match the ui in the new web app redesign. For reference, here is a screenshot of the figma:
Linear task: https://linear.app/comm/issue/ENG-5937/calendar-ui-updates
Depends on D10568