#67 ✨ feat: 기사 상세 조회 시 날짜 포멧 통일 및 썸네일과 원문 링크 응답에 추가

Author: kingmingyu

src/main/java/com/finsight/finsight/domain/learning/application/dto/response/LearningResponseDTO.java

@@ -61,6 +61,8 @@ public record NewsDetailResponse(
                         List<CoreTerm> coreTerms,
                         String title,
                         String date,
+                        String thumbnailUrl,
+                        String originalUrl,
                         Summary3Lines summary3Lines,
                         String bodySummary,
                         List<Insight> insights) {

src/main/java/com/finsight/finsight/domain/learning/persistence/mapper/LearningConverter.java

@@ -9,6 +9,9 @@
 import com.finsight.finsight.domain.ai.persistence.entity.AiArticleInsightEntity;
 
 import java.util.*;
+import java.time.LocalDateTime;
+import java.time.format.DateTimeFormatter;
+import java.util.Locale;
 
 import com.fasterxml.jackson.databind.JsonNode;
 import com.fasterxml.jackson.databind.ObjectMapper;
@@ -21,6 +24,10 @@ public class LearningConverter {
 
     private final ObjectMapper objectMapper;
 
+    // 한국어 날짜 포맷터: "2026.01.01. 오후 4:51"
+    private static final DateTimeFormatter KOREAN_DATE_FORMATTER = DateTimeFormatter.ofPattern("yyyy.MM.dd. a h:mm",
+            Locale.KOREAN);
+
     // 단일 엔티티 -> NewsItem DTO
     public static LearningResponseDTO.NewsItem toNewsItem(NaverArticleEntity entity, List<AiTermCardEntity> terms) {
         return LearningResponseDTO.NewsItem.builder()
@@ -111,13 +118,23 @@ public LearningResponseDTO.NewsDetailResponse toNewsDetailResponse(
                                 .build())
                         .toList())
                 .title(article.getTitle())
-                .date(article.getPublishedAt().toString())
+                .date(formatKoreanDate(article.getPublishedAt()))
+                .thumbnailUrl(article.getThumbnailUrl())
+                .originalUrl(article.getUrl())
                 .summary3Lines(parseSummary3Lines(summary.getSummary3Lines()))
                 .bodySummary(summary.getSummaryFull())
                 .insights(parseInsights(insight.getInsightJson()))
                 .build();
     }
 
+    // LocalDateTime을 한국어 형식 날짜로 변환
+    private String formatKoreanDate(LocalDateTime dateTime) {
+        if (dateTime == null) {
+            return "";
+        }
+        return dateTime.format(KOREAN_DATE_FORMATTER);
+    }
+
     private LearningResponseDTO.Summary3Lines parseSummary3Lines(String rawText) {
         if (rawText == null || rawText.isBlank()) {
             return LearningResponseDTO.Summary3Lines.builder().build();