rework session layer on PasswordSession + three-client pattern

- PasswordSession (@atproto/lex-password-session) is now the single auth
  core; SessionAgent bridges it to the base Agent from @atproto/api so
  the ~148 useAgent() consumer files keep working unchanged
- SessionBundle carries {session, agent, accountClient, appviewClient};
  useLexClient() now returns the authed appview client, new
  useAppviewClient()/usePdsClient() hooks
- reducer: OpaqueSessionBundle, new replaced-current-bundle action for
  network-free cross-tab same-did sync (PasswordSession is immutable, so
  the bundle is rebuilt instead of mutated in place)
- moderation: AtpAgent.configure -> Client.configure + Agent.configure,
  per-account labelers on both the bridge and the appview client
- push-token unregistration uses temporary PasswordSessions
- hard-tail migrations: SignupQueued refresh via resumeSession shim,
  useBeginAgeAssurance scoped-token raw Client, useAccountEmailState
  reads currentAccount
- PDS routing preserved on the no-network resume fast path by
  synthesizing a minimal didDoc from the persisted pdsUrl

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

src/state/session/logging.ts

@@ -1,4 +1,5 @@
-import {type AtpSessionData, type AtpSessionEvent} from '@atproto/api'
+import {type AtpSessionEvent} from '@atproto/api'
+import {type SessionData} from '@atproto/lex-password-session'
 
 import {type Schema} from '../persisted'
 import {type Action, type State} from './reducer'
@@ -53,8 +54,8 @@ type Log =
   | {
       type: 'agent:patch'
       agent: object
-      prevSession: AtpSessionData | undefined
-      nextSession: AtpSessionData | undefined
+      prevSession: SessionData | undefined
+      nextSession: SessionData | undefined
     }
 
 export function wrapSessionReducerForLogging(reducer: Reducer): Reducer {