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/screens/ProfileList/AboutSection.tsx

@@ -1,6 +1,5 @@
 import {useCallback, useImperativeHandle, useState} from 'react'
 import {View} from 'react-native'
-import {type AppBskyGraphDefs} from '@atproto/api'
 import {msg} from '@lingui/core/macro'
 import {useLingui} from '@lingui/react'
 import {Trans} from '@lingui/react/macro'
@@ -15,6 +14,7 @@ import {Button, ButtonIcon, ButtonText} from '#/components/Button'
 import {BulletList_Stroke1_Corner0_Rounded as ListIcon} from '#/components/icons/BulletList'
 import {PersonPlus_Stroke2_Corner0_Rounded as PersonPlusIcon} from '#/components/icons/Person'
 import {IS_NATIVE} from '#/env'
+import {type app} from '#/lexicons'
 
 interface SectionRef {
   scrollToTop: () => void
@@ -22,7 +22,7 @@ interface SectionRef {
 
 interface AboutSectionProps {
   ref?: React.Ref<SectionRef>
-  list: AppBskyGraphDefs.ListView
+  list: app.bsky.graph.defs.ListView
   onPressAddUser: () => void
   headerHeight: number
   scrollElRef: ListRef