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/lib/claude-handoff.ts

@@ -27,6 +27,8 @@ import { execSync, spawn } from 'child_process';
 import * as p from '@clack/prompts';
 import k from 'kleur';
 
+import { note } from './theme.js';
+
 export interface HandoffContext {
   /** Channel this handoff is happening in (e.g., 'teams'). */
   channel: string;
@@ -69,7 +71,7 @@ export async function offerClaudeHandoff(ctx: HandoffContext): Promise<boolean>
 
   const systemPrompt = buildSystemPrompt(ctx);
 
-  p.note(
+  note(
     [
       "I'm handing you off to Claude in interactive mode.",
       "It has the context of where you are in setup.",