Change Details

This diff updates the chat component to use the panel component I introduced earlier. To make things easy to review I only included the changes for the thread list; however, in subsequent diffs I will bring back the message list and house it in this same panel component Linear task: https://linear.app/comm/issue/ENG-5935/chat-thread-list-ui-redesign Depends on D10527

**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 component to use the panel component I introduced earlier. To make things easy to review I only included the changes for the thread list; however, in subsequent diffs I will bring back the message list and house it in this same panel component Linear task: https://linear.app/comm/issue/ENG-5935/chat-thread-list-ui-redesign Depends on D10527

**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 component to use the panel component I introduced earlier. To make things easy to review I only included the changes for the thread list; however, in subsequent diffs I will bring back the message list and house it in this same panel component Linear task: https://linear.app/comm/issue/ENG-5935/chat-thread-list-ui-redesign Depends on D10527