finish phase 3: type-only codemod and zero non-bridge @atproto/api imports

Task 8: codemod repointed 150 namespace-type files to #/lexicons
(AppBskyFeedDefs.PostView -> app.bsky.feed.defs.PostView, .Record -> .Main)
plus ~105 hand-fixed consumers (composer/video state, DebugMod, Profile,
onboarding, dialogs). DM_SERVICE_HEADERS deleted; last chat call sites on
the chat client. RichText.tsx flipped to SDK-only. Remaining @atproto/api
importers: the three session bridge files, the deliberate dual-world
matcher in lib/xrpc-error.ts, and test fixtures. toLex boundary casts are
TODO(phase4)-tagged for bridge removal.

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

src/state/queries/trending/useGetSuggestedUsersForDiscoverQuery.ts

@@ -10,6 +10,7 @@ import {STALE} from '#/state/queries'
 import {usePreferencesQuery} from '#/state/queries/preferences'
 import {useAgent} from '#/state/session'
 import {type app} from '#/lexicons'
+import {toLex} from '#/types/bsky'
 
 export type QueryProps = {
   limit?: number
@@ -47,7 +48,15 @@ export function useGetSuggestedUsersForDiscoverQuery(props: QueryProps = {}) {
       if (!data.recIdStr) {
         logger.debug('getSuggestedUsersForDiscover response missing recIdStr')
       }
-      return {...data, recId: data.recIdStr}
+      /*
+       * TODO(phase4): drop toLex once getSuggestedUsersForDiscover migrates off
+       * the bridge agent (this unspecced endpoint is intentionally left on the
+       * bridge in Phase 3, so it returns old `@atproto/api` view types).
+       */
+      return toLex<{
+        actors: app.bsky.actor.defs.ProfileView[]
+        recId: string | undefined
+      }>({...data, recId: data.recIdStr})
     },
   })
 }