fix: stop dimming setup card bodies

Clack's `p.note` defaults to `format: e => styleText("dim", e)`, which
fades note bodies regardless of the project's stated readability stance
(see comment on `dimWrap` in setup/lib/theme.ts: "prose renders at the
terminal's regular weight"). The dim styling makes body copy hard to
read on dark terminals and visibly washes out brand-colored segments
embedded in cards (e.g. the chip + bold heading rows).

Add a `note()` helper in setup/lib/theme.ts that wraps `p.note` with a
pass-through formatter, and route every setup-flow `p.note` call site
through it: setup/auto.ts, every setup/channels/*.ts adapter, and the
two setup/lib/claude-* helpers.

Pre-styled segments (brandBold, brandChip, formatPairingCard,
formatCodeCard) now render at full strength instead of being faded
alongside surrounding prose.

setup/channels/discord.ts

@@ -31,6 +31,7 @@ import { brightSelect } from '../lib/bright-select.js';
 import { confirmThenOpen } from '../lib/browser.js';
 import { askOperatorRole } from '../lib/role-prompt.js';
 import { ensureAnswer, fail, runQuietChild } from '../lib/runner.js';
+import { note } from '../lib/theme.js';
 
 const DEFAULT_AGENT_NAME = 'Nano';
 const DISCORD_API = 'https://discord.com/api/v10';
@@ -155,7 +156,7 @@ async function askHasBotToken(): Promise<boolean> {
 
 async function walkThroughBotCreation(): Promise<void> {
   const url = 'https://discord.com/developers/applications';
-  p.note(
+  note(
     [
       "You'll create a Discord bot in the Developer Portal. It's free and takes about a minute.",
       '',
@@ -184,7 +185,7 @@ function showTokenLocationReminder(hasExistingBot: boolean): void {
   // to find it — tokens in the Dev Portal aren't visible after first reveal,
   // and "Reset Token" issues a new one.
   if (hasExistingBot) {
-    p.note(
+    note(
       [
         "Where to find your bot token:",
         '',
@@ -216,7 +217,7 @@ async function walkThroughServerCreation(): Promise<void> {
   // the web client and rely on the + button being visible. The steps below
   // are the same whether they're in the desktop app or the browser.
   const url = 'https://discord.com/channels/@me';
-  p.note(
+  note(
     [
       "A Discord server is just a private space for you and the bot. Free and takes 30 seconds.",
       '',
@@ -392,7 +393,7 @@ async function resolveOwnerUserId(
 }
 
 async function promptForUserIdWithDevMode(): Promise<string> {
-  p.note(
+  note(
     [
       "To get your Discord user ID:",
       '',
@@ -430,7 +431,7 @@ async function promptInviteBot(
     `&scope=bot` +
     `&permissions=${INVITE_PERMISSIONS}`;
 
-  p.note(
+  note(
     [
       `@${botUsername} needs to share a server with you before it can DM you.`,
       '',