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

* Add platform vars to env

* Replace /platform/detection with /env

src/screens/Settings/ContentAndMediaSettings.tsx

@@ -4,7 +4,6 @@ import {type NativeStackScreenProps} from '@react-navigation/native-stack'
 
 import {type CommonNavigatorParams} from '#/lib/routes/types'
 import {logEvent} from '#/lib/statsig/statsig'
-import {isNative} from '#/platform/detection'
 import {useAutoplayDisabled, useSetAutoplayDisabled} from '#/state/preferences'
 import {
   useInAppBrowser,
@@ -26,6 +25,7 @@ import {Play_Stroke2_Corner2_Rounded as PlayIcon} from '#/components/icons/Play'
 import {Trending2_Stroke2_Corner2_Rounded as Graph} from '#/components/icons/Trending'
 import {Window_Stroke2_Corner2_Rounded as WindowIcon} from '#/components/icons/Window'
 import * as Layout from '#/components/Layout'
+import {IS_NATIVE} from '#/env'
 import {LiveEventFeedsSettingsToggle} from '#/features/liveEvents/components/LiveEventFeedsSettingsToggle'
 
 type Props = NativeStackScreenProps<
@@ -97,7 +97,7 @@ export function ContentAndMediaSettingsScreen({}: Props) {
             </SettingsList.ItemText>
           </SettingsList.LinkItem>
           <SettingsList.Divider />
-          {isNative && (
+          {IS_NATIVE && (
             <Toggle.Item
               name="use_in_app_browser"
               label={_(msg`Use in-app browser to open links`)}