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/features/liveEvents/preferences.ts

@@ -14,7 +14,7 @@ import {
   type LiveEventFeed,
   type LiveEventFeedMetricContext,
 } from '#/features/liveEvents/types'
-import {app} from '#/lexicons'
+import {type app} from '#/lexicons'
 
 export type LiveEventPreferencesAction = Parameters<
   typeof updateLiveEventPreferences

src/features/liveNow/components/GoLiveDisabledDialog.tsx

@@ -1,6 +1,5 @@
 import {useCallback, useState} from 'react'
 import {View} from 'react-native'
-import {type AppBskyActorDefs} from '@atproto/api'
 import {api} from '@bsky.app/sdk'
 import {msg} from '@lingui/core/macro'
 import {useLingui} from '@lingui/react'
@@ -15,7 +14,7 @@ import * as Dialog from '#/components/Dialog'
 import {Loader} from '#/components/Loader'
 import * as Toast from '#/components/Toast'
 import {Text} from '#/components/Typography'
-import {com, tools} from '#/lexicons'
+import {type app, com, tools} from '#/lexicons'
 import {toLex} from '#/types/bsky'
 
 export function GoLiveDisabledDialog({
@@ -23,7 +22,7 @@ export function GoLiveDisabledDialog({
   status,
 }: {
   control: Dialog.DialogControlProps
-  status: AppBskyActorDefs.StatusView
+  status: app.bsky.actor.defs.StatusView
 }) {
   return (
     <Dialog.Outer control={control} nativeOptions={{preventExpansion: true}}>
@@ -38,7 +37,7 @@ export function DialogInner({
   status,
 }: {
   control: Dialog.DialogControlProps
-  status: AppBskyActorDefs.StatusView
+  status: app.bsky.actor.defs.StatusView
 }) {
   const {_} = useLingui()
   const {currentAccount} = useSession()

src/features/liveNow/index.tsx

@@ -332,7 +332,7 @@ export function useUpsertLiveStatusMutation(
             $type: 'app.bsky.actor.defs#statusView',
             status: 'app.bsky.actor.status#live',
             isActive: true,
-            expiresAt: expiresAt.toISOString(),
+            expiresAt: expiresAt.toISOString() as DatetimeString,
             embed:
               record.embed && image
                 ? {
@@ -340,7 +340,7 @@ export function useUpsertLiveStatusMutation(
                     external: {
                       ...record.embed.external,
                       $type: 'app.bsky.embed.external#viewExternal',
-                      thumb: image,
+                      thumb: image as UriString,
                     },
                   }
                 : undefined,