**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 chat tabs ui to match the ui of the new web app redesign. The new chat tabs ui has a lighter background color, here is a screenshot of the figma for reference:
{F1026610}
Linear task: https://linear.app/comm/issue/ENG-5969/update-the-tab-bar-ui
Depends on