Refactor: separate authMachine from React (#5110)

* Create a global appMachine

* Strip authMachine of side-effects

* Replace react-bound authMachine use with XState actor use

* Fix import goof

* Register auth commands directly!

* @lf94 feedback: conver `AuthNavigationHandler` to `useAuthNavigation`

* Uh, fix signing out thank you @lf94

* Fix tsc

* A snapshot a day keeps the bugs away! 📷🐛 (OS: namespace-profile-ubuntu-8-cores)

* Revert "A snapshot a day keeps the bugs away! 📷🐛 (OS: namespace-profile-ubuntu-8-cores)"

This reverts commit 8dc50b6a26.

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Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>

src/components/AppHeader.tsx

@@ -2,11 +2,11 @@ import { Toolbar } from '../Toolbar'
 import UserSidebarMenu from 'components/UserSidebarMenu'
 import { type IndexLoaderData } from 'lib/types'
 import ProjectSidebarMenu from './ProjectSidebarMenu'
-import { useSettingsAuthContext } from 'hooks/useSettingsAuthContext'
 import styles from './AppHeader.module.css'
 import { RefreshButton } from 'components/RefreshButton'
 import { CommandBarOpenButton } from './CommandBarOpenButton'
 import { isDesktop } from 'lib/isDesktop'
+import { useUser } from 'machines/appMachine'
 
 interface AppHeaderProps extends React.PropsWithChildren {
   showToolbar?: boolean
@@ -24,8 +24,7 @@ export const AppHeader = ({
   style,
   enableMenu = false,
 }: AppHeaderProps) => {
-  const { auth } = useSettingsAuthContext()
-  const user = auth?.context?.user
+  const user = useUser()
 
   return (
     <header