migrate the notification say-hello action to the chat client

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

src/view/com/notifications/NotificationFeedItem.tsx

@@ -21,12 +21,13 @@ import {
   type ModerationOpts,
 } from '@atproto/api'
 import {TID} from '@atproto/common-web'
+import {type DidString} from '@atproto/syntax'
 import {plural} from '@lingui/core/macro'
 import {Plural, Trans, useLingui} from '@lingui/react/macro'
 import {useNavigation} from '@react-navigation/native'
 import {useQueryClient} from '@tanstack/react-query'
 
-import {DM_SERVICE_HEADERS, MAX_POST_LINES} from '#/lib/constants'
+import {MAX_POST_LINES} from '#/lib/constants'
 import {useAnimatedValue} from '#/lib/hooks/useAnimatedValue'
 import {makeProfileLink} from '#/lib/routes/links'
 import {type NavigationProp} from '#/lib/routes/types'
@@ -38,7 +39,7 @@ import {useProfileShadow} from '#/state/cache/profile-shadow'
 import {type FeedNotification} from '#/state/queries/notifications/feed'
 import {useProfileFollowMutationQueue} from '#/state/queries/profile'
 import {unstableCacheProfileView} from '#/state/queries/unstable-profile-cache'
-import {useAgent, useSession} from '#/state/session'
+import {useChatClient, useSession} from '#/state/session'
 import {FeedSourceCard} from '#/view/com/feeds/FeedSourceCard'
 import {Post} from '#/view/com/post/Post'
 import {formatCount} from '#/view/com/util/numeric/format'
@@ -73,6 +74,7 @@ import * as Toast from '#/components/Toast'
 import {Text} from '#/components/Typography'
 import {useAnalytics} from '#/analytics'
 import {IS_WEB} from '#/env'
+import {chat} from '#/lexicons'
 import * as bsky from '#/types/bsky'
 
 const MAX_AUTHORS = 5
@@ -911,21 +913,21 @@ function FollowBackButton({profile}: {profile: AppBskyActorDefs.ProfileView}) {
 
 function SayHelloBtn({profile}: {profile: AppBskyActorDefs.ProfileView}) {
   const {t: l} = useLingui()
-  const agent = useAgent()
+  const client = useChatClient()
+  const {currentAccount} = useSession()
   const navigation = useNavigation<NavigationProp>()
   const [isLoading, setIsLoading] = useState(false)
 
   const onPress = async () => {
     try {
       setIsLoading(true)
-      const res = await agent.api.chat.bsky.convo.getConvoForMembers(
-        {
-          members: [profile.did, agent.session!.did],
-        },
-        {headers: DM_SERVICE_HEADERS},
-      )
+      const data = await client.call(chat.bsky.convo.getConvoForMembers, {
+        // both dids are already resolved - one from the profile view, one from
+        // the active session
+        members: [profile.did, currentAccount!.did] as DidString[],
+      })
       navigation.navigate('MessagesConversation', {
-        conversation: res.data.convo.id,
+        conversation: data.convo.id,
       })
     } catch (e) {
       logger.error('Failed to get conversation', {safeMessage: e})