[APP-1356] Policy update dialog (#8782)

* Add blocking announcement dialog feature

* WIP custom dialog

* Rework dialog and add native FocusScope

* Lock scroll on web, fix backdrop

* Add web FocusScope

* Create custom Outlet for these announcements

* Clean up FocusScope native impl

* Comments

* Some styling fixes

* Handle screen reader specifically

* Clean up state, remove Portal edits

* Reorg, rename

* Add syncing, tests

* Revert dialog updates

* Revert formatting

* Delete unused file

* Format

* Add FullWindowOverlay

* remove mmkv storage in debug btn

* Add debug code

* fix taps passing through on iOS

* Reorg

* Reorg, rename everything

* Complete policy update after signup

* Add logger

* Move context around, unmount portals on native

* Move a11y prop into FocusScope

* Remove useMemo

* Update dates

* Move debug to dev settings

* Unmount web portals until policy update completed

* UPdate dates

---------

Co-authored-by: Samuel Newman <mozzius@protonmail.com>

src/view/shell/index.tsx

@@ -31,6 +31,10 @@ import {InAppBrowserConsentDialog} from '#/components/dialogs/InAppBrowserConsen
 import {LinkWarningDialog} from '#/components/dialogs/LinkWarning'
 import {MutedWordsDialog} from '#/components/dialogs/MutedWords'
 import {SigninDialog} from '#/components/dialogs/Signin'
+import {
+  Outlet as PolicyUpdateOverlayPortalOutlet,
+  usePolicyUpdateStateContext,
+} from '#/components/PolicyUpdateOverlay'
 import {Outlet as PortalOutlet} from '#/components/Portal'
 import {RoutesContainer, TabsNavigator} from '#/Navigation'
 import {BottomSheetOutlet} from '../../../modules/bottom-sheet'
@@ -45,6 +49,7 @@ function ShellInner() {
   const setIsDrawerOpen = useSetDrawerOpen()
   const winDim = useWindowDimensions()
   const insets = useSafeAreaInsets()
+  const policyUpdateState = usePolicyUpdateStateContext()
 
   const renderDrawerContent = useCallback(() => <DrawerContent />, [])
   const onOpenDrawer = useCallback(
@@ -151,6 +156,7 @@ function ShellInner() {
           </Drawer>
         </ErrorBoundary>
       </View>
+
       <Composer winHeight={winDim.height} />
       <ModalsContainer />
       <MutedWordsDialog />
@@ -160,8 +166,16 @@ function ShellInner() {
       <InAppBrowserConsentDialog />
       <LinkWarningDialog />
       <Lightbox />
-      <PortalOutlet />
-      <BottomSheetOutlet />
+
+      {/* Until policy update has been completed by the user, don't render anything that is portaled */}
+      {policyUpdateState.completed && (
+        <>
+          <PortalOutlet />
+          <BottomSheetOutlet />
+        </>
+      )}
+
+      <PolicyUpdateOverlayPortalOutlet />
     </>
   )
 }