style: 카테고리 설명문 +2pt, #4F1DA1

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

src/pages/DiscoveryReportPage.tsx

@@ -205,7 +205,7 @@ export default function DiscoveryReportPage() {
                     <ScoreRing score={cs.pct} size={64} />
                   </div>
                 </div>
-                <p className="text-base text-slate-500 mb-4">{cs.category.description}</p>
+                <p className="text-lg text-[#4F1DA1] mb-4">{cs.category.description}</p>
 
                 <div className="divide-y divide-slate-100">
                   {criteria.map((c) => {