[SDK] Remove @atproto/api (#11386)

Co-authored-by: Claude Fable 5 <noreply@anthropic.com>

src/lib/hooks/useNotificationHandler.ts

@@ -1,6 +1,6 @@
 import {useEffect} from 'react'
 import * as Notifications from 'expo-notifications'
-import {AtUri} from '@atproto/api'
+import {AtUri} from '@atproto/syntax'
 import {useLingui} from '@lingui/react/macro'
 import {CommonActions, useNavigation} from '@react-navigation/native'
 import {useQueryClient} from '@tanstack/react-query'

src/lib/hooks/usePostViewTracking.ts

@@ -1,7 +1,7 @@
 import {useCallback, useRef} from 'react'
-import {type AppBskyFeedDefs} from '@atproto/api'
 
 import {type Metrics, useAnalytics} from '#/analytics'
+import {type app} from '#/lexicons'
 
 /**
  * Hook that returns a callback to track post:view events.
@@ -17,7 +17,7 @@ export function usePostViewTracking(
   const seenUrisRef = useRef(new Set<string>())
 
   const trackPostView = useCallback(
-    (post: AppBskyFeedDefs.PostView) => {
+    (post: app.bsky.feed.defs.PostView) => {
       if (seenUrisRef.current.has(post.uri)) return
       seenUrisRef.current.add(post.uri)