[SDK] Validate and brand the persisted account did (#11387)

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

src/features/liveNow/index.tsx

@@ -1,7 +1,7 @@
 import {useMemo} from 'react'
 import {retry} from '@atproto/common-web'
 import {type $Typed, type l, type UriString} from '@atproto/lex'
-import {type AtIdentifierString, AtUri, toDatetimeString} from '@atproto/syntax'
+import {AtUri, toDatetimeString} from '@atproto/syntax'
 import {moderateStatus} from '@bsky.app/sdk/moderation'
 import {msg} from '@lingui/core/macro'
 import {useLingui} from '@lingui/react'
@@ -276,8 +276,7 @@ export function useUpsertLiveStatusMutation(
       } satisfies app.bsky.actor.status.Main
 
       const upsert = async () => {
-        // the session account is still legacy-typed, so its did is unbranded
-        const repo = currentAccount.did as AtIdentifierString
+        const repo = currentAccount.did
         const collection = 'app.bsky.actor.status'
 
         const existing = await pdsClient
@@ -369,7 +368,7 @@ export function useRemoveLiveStatusMutation() {
       if (!currentAccount) throw new Error('Not logged in')
 
       await pdsClient.delete(app.bsky.actor.status, {
-        repo: currentAccount.did as AtIdentifierString,
+        repo: currentAccount.did,
         rkey: 'self',
       })
     },