cast branded chat convo params with the syntax types

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

src/state/queries/messages/get-convo-availability.ts

@@ -1,3 +1,4 @@
+import {type DidString} from '@atproto/syntax'
 import {useQuery} from '@tanstack/react-query'
 
 import {useChatClient} from '#/state/session'
@@ -18,9 +19,7 @@ export function useGetConvoAvailabilityQuery(
     queryFn: async () => {
       return await client.call(chat.bsky.convo.getConvoAvailability, {
         // callers pass an already-resolved actor did
-        members: [
-          did,
-        ] as chat.bsky.convo.getConvoAvailability.$Params['members'],
+        members: [did as DidString],
       })
     },
     staleTime: STALE.INFINITY,

src/state/queries/messages/get-convo-for-members.ts

@@ -1,4 +1,5 @@
 import {type ChatBskyConvoGetConvoForMembers} from '@atproto/api'
+import {type DidString} from '@atproto/syntax'
 import {useMutation, useQueryClient} from '@tanstack/react-query'
 
 import {logger} from '#/logger'
@@ -20,8 +21,7 @@ export function useGetConvoForMembers({
     mutationFn: async (members: string[]) => {
       return await client.call(chat.bsky.convo.getConvoForMembers, {
         // callers pass already-resolved actor dids
-        members:
-          members as chat.bsky.convo.getConvoForMembers.$Params['members'],
+        members: members as DidString[],
       })
     },
     onSuccess: data => {