Summary: Previously the left rail state was decided by prescense of user profile but we are moving to logged in state being based on the atom. As a result we need to cache the user profile so we have something to display when user not on vpn on startup Reviewed By: aigoncharov Differential Revision: D44502477 fbshipit-source-id: 11462d24c773d6d364e844b4f606e124e5278348
flipper-ui-core (TBD)
Flipper's UI, agnostic of Electron vs Browser.