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-assist.ts

@@ -24,7 +24,7 @@ import * as p from '@clack/prompts';
 import k from 'kleur';
 
 import { ensureAnswer } from './runner.js';
-import { fitToWidth } from './theme.js';
+import { fitToWidth, note } from './theme.js';
 
 export interface AssistContext {
   stepName: string;
@@ -111,7 +111,7 @@ export async function offerClaudeAssist(
     return false;
   }
 
-  p.note(
+  note(
     `${parsed.reason}\n\n${k.cyan('$')} ${parsed.command}`,
     "Claude's suggestion",
   );