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/screens/Messages/components/RequestButtons.tsx

@@ -41,6 +41,8 @@ import {Loader} from '#/components/Loader'
 import * as Menu from '#/components/Menu'
 import {ReportDialog} from '#/components/moderation/ReportDialog'
 import * as Toast from '#/components/Toast'
+import {type chat} from '#/lexicons'
+import * as bsky from '#/types/bsky'
 
 export function RejectMenu({
   convo,
@@ -228,7 +230,18 @@ export function AcceptChatButton({
     onMutate: () => {
       onAcceptConvo?.()
       if (currentScreen === 'list') {
-        precacheConvoQuery(queryClient, {...convo, status: 'accepted'})
+        /*
+         * `convo` is the old-typed view threaded from `#/components/dms/util`
+         * consumers while the convo cache is now keyed on the lexicon
+         * ConvoView. TODO(phase4): drop toLex once this file's props flip.
+         */
+        precacheConvoQuery(
+          queryClient,
+          bsky.toLex<chat.bsky.convo.defs.ConvoView>({
+            ...convo,
+            status: 'accepted',
+          }),
+        )
         navigation.navigate('MessagesConversation', {
           conversation: convo.id,
           accept: true,