fix(tarot): 해석 완료 시 자동 AI 탭 전환 + 새 리딩 시 해석 state 잔존 버그

Issue 1 — 우측 패널 탭이 hardcoded is-active로 클릭/state 없음:
- InterpretationPanel에 activeTab state 추가
- useEffect로 interpretation 도착 시 자동 'ai' 탭 전환, 없으면 'card'
- 두 탭 콘텐츠 분리: card=카드 의미·상징·조언, ai=위치 해석·종합·상호작용·근거

Issue 2 — useTarotReading hook의 interpretation이 새 리딩 시작에 잔존:
- hook에 reset() 함수 추가 (status/interpretation/readingId/error 초기화)
- Reading.jsx의 startShuffle/openCardSpread/restart/resetCards/changeSpread
  5개 액션에서 모두 reset() 호출 — 새 리딩 시작 시 이전 해석 완전 제거

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/pages/tarot/Reading.jsx

@@ -53,19 +53,21 @@ export default function Reading() {
 
   const spread = SPREADS[spreadId];
   const { slice, reshuffle } = useTarotShuffle(TAROT_DECK, 20);
-  const { status, interpretation, runInterpretAndSave, error } = useTarotReading();
+  const { status, interpretation, runInterpretAndSave, error, reset } = useTarotReading();
 
   const startShuffle = () => {
     reshuffle();
     setPicks([]);
     setFocusIdx(null);
     setStep(1);
+    reset();
   };
 
   const openCardSpread = () => {
     setPicks([]);
     setFocusIdx(null);
     setStep(2);
+    reset();
   };
 
   const handlePick = (card = null) => {
@@ -92,6 +94,7 @@ export default function Reading() {
 
   const restart = () => {
     setStep(1); setPicks([]); setFocusIdx(null);
+    reset();
   };
 
   const resetCards = () => {
@@ -99,6 +102,7 @@ export default function Reading() {
     setPicks([]);
     setFocusIdx(null);
     setStep(1);
+    reset();
   };
 
   const changeSpread = (nextSpreadId) => {
@@ -107,6 +111,7 @@ export default function Reading() {
     setFocusIdx(null);
     setStep(1);
     reshuffle();
+    reset();
   };
 
   const disabledIds = picks.map((p) => p.card.slug);

src/pages/tarot/components/InterpretationPanel.jsx

@@ -1,4 +1,4 @@
-import React, { useState } from 'react';
+import React, { useEffect, useState } from 'react';
 
 function ConfidenceBadge({ level }) {
   if (!level) return null;
@@ -14,15 +14,36 @@ export default function InterpretationPanel({
   selectedPosition,
   selectedReversed = false,
 }) {
+  const [activeTab, setActiveTab] = useState('card');
   const [showEvidence, setShowEvidence] = useState(true);
 
+  useEffect(() => {
+    setActiveTab(interpretation ? 'ai' : 'card');
+  }, [interpretation]);
+
+  const hasAI = !!interpretation;
+
+  const renderTabs = () => (
+    <div className="tarot-panel__tabs">
+      <button
+        type="button"
+        className={activeTab === 'card' ? 'is-active' : ''}
+        onClick={() => setActiveTab('card')}
+      >카드 해석</button>
+      <button
+        type="button"
+        className={activeTab === 'ai' ? 'is-active' : ''}
+        onClick={() => setActiveTab('ai')}
+        disabled={!hasAI}
+        aria-disabled={!hasAI}
+      >AI 인사이트</button>
+    </div>
+  );
+
   if (!interpretation && !selectedCard) {
     return (
       <aside className="tarot-panel tarot-panel--reading">
-        <div className="tarot-panel__tabs">
-          <button type="button" className="is-active">카드 해석</button>
-          <button type="button">AI 인사이트</button>
-        </div>
+        {renderTabs()}
         <div className="tarot-panel__empty-state">
           <span>✦</span>
           <p>카드를 뽑으면 이곳에 카드 의미와 AI 인사이트가 표시됩니다.</p>
@@ -44,10 +65,7 @@ export default function InterpretationPanel({
 
   return (
     <aside className="tarot-panel tarot-panel--reading">
-      <div className="tarot-panel__tabs">
-        <button type="button" className="is-active">카드 해석</button>
-        <button type="button">AI 인사이트</button>
-      </div>
+      {renderTabs()}
 
       {selectedCard && (
         <header className="tarot-panel__head">
@@ -65,7 +83,7 @@ export default function InterpretationPanel({
         </header>
       )}
 
-      {selectedCard && !interpretation && (
+      {activeTab === 'card' && selectedCard && (
         <>
           <section className="tarot-panel__section">
             <h4>카드 의미 요약</h4>
@@ -86,10 +104,12 @@ export default function InterpretationPanel({
               ))}
             </ul>
           </section>
+          {!hasAI && (
             <section className="tarot-panel__section tarot-panel__ai-note">
               <h4>AI 타로 해석 ✦</h4>
               <p>모든 카드를 뽑은 뒤 해석 버튼을 누르면 질문과 스프레드 위치를 함께 반영한 리딩이 생성됩니다.</p>
             </section>
+          )}
           <div className="tarot-panel__advice-card">
             <span aria-hidden>☾</span>
             <p>
@@ -100,6 +120,8 @@ export default function InterpretationPanel({
         </>
       )}
 
+      {activeTab === 'ai' && hasAI && (
+        <>
           {cardDetail && (
             <section className="tarot-panel__section">
               <h4>이 위치의 해석</h4>
@@ -125,7 +147,6 @@ export default function InterpretationPanel({
             </section>
           )}
 
-      {interpretation && (
           <section className="tarot-panel__section">
             <h4>종합 해석 <ConfidenceBadge level={interpretation.confidence} /></h4>
             <p>{interpretation.summary}</p>
@@ -134,9 +155,8 @@ export default function InterpretationPanel({
               <p className="tarot-panel__warning">⚠️ {interpretation.warning}</p>
             )}
           </section>
-      )}
 
-      {(interpretation?.interactions || []).length > 0 && (
+          {(interpretation.interactions || []).length > 0 && (
             <section className="tarot-panel__section">
               <h4>카드 상호작용</h4>
               <ul className="tarot-interactions">
@@ -153,6 +173,8 @@ export default function InterpretationPanel({
               </ul>
             </section>
           )}
+        </>
+      )}
     </aside>
   );
 }

src/pages/tarot/hooks/useTarotReading.js

@@ -96,5 +96,12 @@ export function useTarotReading() {
     return interp.interpretation_json;
   }, []);
 
-  return { status, interpretation, readingId, error, runInterpretAndSave };
+  const reset = useCallback(() => {
+    setStatus('idle');
+    setInterpretation(null);
+    setReadingId(null);
+    setError(null);
+  }, []);
+
+  return { status, interpretation, readingId, error, runInterpretAndSave, reset };
 }