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

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

src/screens/Onboarding/StepSuggestedStarterpacks/StarterPackCard.tsx

@@ -75,7 +75,6 @@ export function StarterPackCard({
     let followUris: Map<string, string>
     try {
       followUris = await bulkWriteFollows(pdsClient, appviewClient, dids, {
-        // the starter pack view is still legacy-typed
         uri: view.uri,
         cid: view.cid,
       })

src/screens/Onboarding/util.ts

@@ -21,7 +21,7 @@ export async function bulkWriteFollows(
   const followRecords: $Typed<app.bsky.graph.follow.Main>[] = dids.map(did => {
     return {
       $type: 'app.bsky.graph.follow',
-      // callers hold plain dids read off legacy-typed views
+      // the helper takes the dids as plain strings
       subject: did as DidString,
       createdAt: toDatetimeString(new Date()),
       via,