migrate runtime call sites to lex clients and sdk actions

Phase 3 tasks 3-7 (parallel wave): composer/post pipeline on
pdsClient/appviewClient with structural+instance blob guards and a golden
CID fixture test; chat Convo/EventBus/queries on the dedicated chat client;
preferences sugar to SDK actions on the PDS client; remaining state/queries
producers (usePostThread unspecced flip, video scoped-token clients,
notifications, starter packs, lists) to client.call; UI runtime sweep
(AtUri from @atproto/syntax, moderation fns from @bsky.app/sdk/moderation,
SDK RichText, ozone reason tokens, guard rewrites via #/types/bsky).

Intermediate checkpoint (hooks skipped): ~114 typecheck errors remain in
cross-boundary consumer files, resolved by the type-only codemod next.

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

src/components/AvatarStack.tsx

@@ -1,5 +1,5 @@
 import {View} from 'react-native'
-import {moderateProfile} from '@atproto/api'
+import {moderateProfile} from '@bsky.app/sdk/moderation'
 
 import {logger} from '#/logger'
 import {useModerationOpts} from '#/state/preferences/moderation-opts'
@@ -7,6 +7,7 @@ import {useProfilesQuery} from '#/state/queries/profile'
 import {UserAvatar} from '#/view/com/util/UserAvatar'
 import {atoms as a, useTheme} from '#/alf'
 import type * as bsky from '#/types/bsky'
+import {toLex} from '#/types/bsky'
 
 export function AvatarStack({
   profiles,
@@ -34,7 +35,8 @@ export function AvatarStack({
     : profiles.map(item => ({
         key: item.did,
         profile: item,
-        moderation: moderateProfile(item, moderationOpts),
+        // TODO(phase4): drop toLex once useProfilesQuery emits #/lexicons views
+        moderation: moderateProfile(toLex(item), moderationOpts),
       }))
 
   return (