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

* Add platform vars to env

* Replace /platform/detection with /env

src/components/Post/Embed/VideoEmbed/ActiveVideoWebContext.tsx

@@ -8,7 +8,7 @@ import React, {
 } from 'react'
 import {useWindowDimensions} from 'react-native'
 
-import {isNative, isWeb} from '#/platform/detection'
+import {IS_NATIVE, IS_WEB} from '#/env'
 
 const Context = React.createContext<{
   activeViewId: string | null
@@ -18,7 +18,7 @@ const Context = React.createContext<{
 Context.displayName = 'ActiveVideoWebContext'
 
 export function Provider({children}: {children: React.ReactNode}) {
-  if (!isWeb) {
+  if (!IS_WEB) {
     throw new Error('ActiveVideoWebContext may only be used on web.')
   }
 
@@ -47,7 +47,7 @@ export function Provider({children}: {children: React.ReactNode}) {
 
   const sendViewPosition = useCallback(
     (viewId: string, y: number) => {
-      if (isNative) return
+      if (IS_NATIVE) return
 
       if (viewId === activeViewIdRef.current) {
         activeViewLocationRef.current = y

src/components/Post/Embed/VideoEmbed/VideoEmbedInner/web-controls/VideoControls.tsx

@@ -6,7 +6,6 @@ import type Hls from 'hls.js'
 
 import {isTouchDevice} from '#/lib/browser'
 import {clamp} from '#/lib/numbers'
-import {isIPhoneWeb} from '#/platform/detection'
 import {
   useAutoplayDisabled,
   useSetSubtitlesEnabled,
@@ -28,6 +27,7 @@ import {Pause_Filled_Corner0_Rounded as PauseIcon} from '#/components/icons/Paus
 import {Play_Filled_Corner0_Rounded as PlayIcon} from '#/components/icons/Play'
 import {Loader} from '#/components/Loader'
 import {Text} from '#/components/Typography'
+import {IS_WEB_MOBILE_IOS} from '#/env'
 import {TimeIndicator} from '../TimeIndicator'
 import {ControlButton} from './ControlButton'
 import {Scrubber} from './Scrubber'
@@ -400,7 +400,7 @@ export function Controls({
             onEndHover={onVolumeEndHover}
             drawFocus={drawFocus}
           />
-          {!isIPhoneWeb && (
+          {!IS_WEB_MOBILE_IOS && (
             <ControlButton
               active={isFullscreen}
               activeLabel={_(msg`Exit fullscreen`)}