feat(setup): clarify setup flow from user-feedback session

- Container step: duration hint + 3-line rolling output window with
  60s stall detector that offers "keep waiting" vs "ask Claude"
- First chat: reframed as a try-out with sandbox-model explainer
  (wakes on message, sleeps when idle, context persists)
- Timezone: auto-detected non-UTC zones now get an explicit
  confirm from the user instead of silent persist
- Outro: added always-on warning + prominent "check your DM" banner
  when a channel was configured; directive last line
- Discord: always show token-location reminder even when user says
  they have one; new "do you have a server?" branch walks through
  server creation if not
- All select prompts: custom brightSelect renderer keeps inactive
  option labels at full brightness (was dim gray); adds @clack/core
  as a direct dep

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

setup/channels/whatsapp.ts

@@ -33,6 +33,7 @@ import * as p from '@clack/prompts';
 import k from 'kleur';
 
 import * as setupLog from '../logs.js';
+import { brightSelect } from '../lib/bright-select.js';
 import {
   type Block,
   type StepResult,
@@ -148,7 +149,7 @@ export async function runWhatsAppChannel(displayName: string): Promise<void> {
 
 async function askAuthMethod(): Promise<AuthMethod> {
   const choice = ensureAnswer(
-    await p.select({
+    await brightSelect({
       message: 'How would you like to authenticate with WhatsApp?',
       options: [
         {