Move /platform/detection vars into /env (#9707)

* Add platform vars to env

* Replace /platform/detection with /env

src/screens/SignupQueued.tsx

@@ -6,7 +6,6 @@ import {msg, plural, Trans} from '@lingui/macro'
 import {useLingui} from '@lingui/react'
 
 import {logger} from '#/logger'
-import {isIOS, isWeb} from '#/platform/detection'
 import {isSignupQueued, useAgent, useSessionApi} from '#/state/session'
 import {useOnboardingDispatch} from '#/state/shell'
 import {Logo} from '#/view/icons/Logo'
@@ -14,6 +13,7 @@ import {atoms as a, native, useBreakpoints, useTheme, web} from '#/alf'
 import {Button, ButtonIcon, ButtonText} from '#/components/Button'
 import {Loader} from '#/components/Loader'
 import {P, Text} from '#/components/Typography'
+import {IS_IOS, IS_WEB} from '#/env'
 
 const COL_WIDTH = 400
 
@@ -98,7 +98,7 @@ export function SignupQueued() {
     </Button>
   )
 
-  const webLayout = isWeb && gtMobile
+  const webLayout = IS_WEB && gtMobile
 
   return (
     <Modal
@@ -106,7 +106,7 @@ export function SignupQueued() {
       animationType={native('slide')}
       presentationStyle="formSheet"
       style={[web(a.util_screen_outer)]}>
-      {isIOS && <SystemBars style={{statusBar: 'light'}} />}
+      {IS_IOS && <SystemBars style={{statusBar: 'light'}} />}
       <ScrollView
         style={[a.flex_1, t.atoms.bg]}
         contentContainerStyle={{borderWidth: 0}}