Refactor minimal shell mode to refcounting (#10319)

src/view/com/auth/LoggedOut.tsx

@@ -13,7 +13,7 @@ import {
   useLoggedOutView,
   useLoggedOutViewControls,
 } from '#/state/shell/logged-out'
-import {useSetMinimalShellMode} from '#/state/shell/minimal-mode'
+import {useEnableMinimalShellMode} from '#/state/shell/minimal-mode'
 import {ErrorBoundary} from '#/view/com/util/ErrorBoundary'
 import {Login} from '#/screens/Login'
 import {Signup} from '#/screens/Signup'
@@ -37,7 +37,7 @@ export function LoggedOut({onDismiss}: {onDismiss?: () => void}) {
   const ax = useAnalytics()
   const t = useTheme()
   const insets = useSafeAreaInsets()
-  const setMinimalShellMode = useSetMinimalShellMode()
+  useEnableMinimalShellMode()
   const {requestedAccountSwitchTo} = useLoggedOutView()
   const [screenState, setScreenState] = useState<ScreenState>(() => {
     if (requestedAccountSwitchTo === 'new') {
@@ -68,10 +68,6 @@ export function LoggedOut({onDismiss}: {onDismiss?: () => void}) {
     })
   }, [accounts, agent, queryClient])
 
-  useEffect(() => {
-    setMinimalShellMode(true)
-  }, [setMinimalShellMode])
-
   const onPressDismiss = useCallback(() => {
     if (onDismiss) {
       onDismiss()

src/view/com/feeds/FeedPage.tsx

@@ -30,7 +30,6 @@ import {
 } from '#/state/queries/post-feed'
 import {truncateAndInvalidate} from '#/state/queries/util'
 import {useSession} from '#/state/session'
-import {useSetMinimalShellMode} from '#/state/shell'
 import {useHeaderOffset} from '#/components/hooks/useHeaderOffset'
 import {useAnalytics} from '#/analytics'
 import {IS_NATIVE} from '#/env'
@@ -70,7 +69,6 @@ export function FeedPage({
   const queryClient = useQueryClient()
   const {openComposer} = useOpenComposer()
   const [isScrolledDown, setIsScrolledDown] = useState(false)
-  const setMinimalShellMode = useSetMinimalShellMode()
   const headerOffset = useHeaderOffset()
   const feedFeedback = useFeedFeedback(feedInfo, hasSession)
   const scrollElRef = useRef<ListMethods>(null)
@@ -95,8 +93,7 @@ export function FeedPage({
       animated: IS_NATIVE,
       offset: -headerOffset,
     })
-    setMinimalShellMode(false)
-  }, [headerOffset, setMinimalShellMode])
+  }, [headerOffset])
 
   const onSoftReset = useCallback(() => {
     const isScreenFocused =