이전종목, 다음종목 힌트 테스트 수정

frontend/src/components/strategyEvaluation/StrategyEvaluationChart.tsx

@@ -724,6 +724,21 @@ const StrategyEvaluationChart: React.FC<Props> = ({
     if (next) onMarketChange(next);
   }, [sortedMarketCodes, market, onMarketChange]);
 
+  const prevMarketCode = useMemo(
+    () => adjacentMarketInList(sortedMarketCodes, market, 'prev'),
+    [sortedMarketCodes, market],
+  );
+  const nextMarketCode = useMemo(
+    () => adjacentMarketInList(sortedMarketCodes, market, 'next'),
+    [sortedMarketCodes, market],
+  );
+  const prevMarketTitle = prevMarketCode
+    ? `이전 종목 (${getKoreanName(prevMarketCode)})`
+    : '이전 종목';
+  const nextMarketTitle = nextMarketCode
+    ? `다음 종목 (${getKoreanName(nextMarketCode)})`
+    : '다음 종목';
+
   useEffect(() => {
     onChartLoadingChange?.(loading);
   }, [loading, onChartLoadingChange]);
@@ -834,8 +849,8 @@ const StrategyEvaluationChart: React.FC<Props> = ({
             <button
               type="button"
               className="btd-analysis-tool seval-market-nav-btn"
-              title="이전 종목"
+              title={prevMarketTitle}
-              aria-label="이전 종목"
+              aria-label={prevMarketTitle}
               disabled={!canMarketPrev || sortedMarketCodes.length === 0}
               onClick={() => stepMarket('prev')}
             >
@@ -846,8 +861,8 @@ const StrategyEvaluationChart: React.FC<Props> = ({
             <button
               type="button"
               className="btd-analysis-tool seval-market-nav-btn"
-              title="다음 종목"
+              title={nextMarketTitle}
-              aria-label="다음 종목"
+              aria-label={nextMarketTitle}
               disabled={!canMarketNext || sortedMarketCodes.length === 0}
               onClick={() => stepMarket('next')}
             >