feat(lotto): DecisionCard + BulkPurchaseButton, BriefingTab 단일 화면 재구성

src/pages/lotto/tabs/BriefingTab.jsx

@@ -1,25 +1,18 @@
 import useBriefing from '../hooks/useBriefing';
-import BriefingHeader from '../components/briefing/BriefingHeader';
-import BriefingSummary from '../components/briefing/BriefingSummary';
-import PickSetCard from '../components/briefing/PickSetCard';
+import useReview from '../hooks/useReview';
+import DecisionCard from '../components/decision/DecisionCard';
 import BriefingEmpty from '../components/briefing/BriefingEmpty';
-import CuratorUsageFooter from '../components/briefing/CuratorUsageFooter';
 
 export default function BriefingTab() {
     const { briefing, loading, error, regenerating, regenerate } = useBriefing();
+    const { latest: review } = useReview();
 
     if (loading) return <div className="briefing-empty"><p>로딩 중...</p></div>;
     if (!briefing) return <BriefingEmpty regenerating={regenerating} onRegenerate={regenerate} error={error} />;
 
     return (
         <div className="briefing-tab">
-            <BriefingHeader briefing={briefing} regenerating={regenerating} onRegenerate={regenerate} />
-            <BriefingSummary narrative={briefing.narrative} />
-            <div className="briefing-picks">
-                <h3>이번 주 5세트</h3>
-                {briefing.picks.map((p, i) => <PickSetCard key={i} pick={p} index={i} />)}
-            </div>
-            <CuratorUsageFooter />
+            <DecisionCard briefing={briefing} review={review} />
         </div>
     );
 }