feat: 게시판 인기글/블라인드/자기글 추천차단 + 프로필 전역 동기화

- GET /api/auth/profile: 아바타·포인트 포함 전체 프로필(재로그인 없이 최신화)
- 자기 글/댓글 추천·비추천 차단(400)
- 인기 글: 등록 1일 이내 + 추천 50건 이상이면 목록 상단 최대 3건 노출(hot)
- 인기 댓글: 동일 조건으로 댓글 목록 상단 정렬(hot)
- PostSummary 에 downCount 추가(비추천 20+ 블라인드 판정용)

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/main/resources/mapper/PostMapper.xml

@@ -38,7 +38,8 @@
             p.id, p.title, p.author_id, p.author_name, p.view_count, p.blocked, p.notice, p.created_at,
             m.google_picture AS author_google_picture, m.profile_image AS author_profile_image,
             (SELECT COUNT(*) FROM comment c WHERE c.post_id = p.id) AS comment_count,
-            (SELECT COUNT(*) FROM post_vote v WHERE v.post_id = p.id AND v.vote_type = 'UP') AS up_count
+            (SELECT COUNT(*) FROM post_vote v WHERE v.post_id = p.id AND v.vote_type = 'UP') AS up_count,
+            (SELECT COUNT(*) FROM post_vote v WHERE v.post_id = p.id AND v.vote_type = 'DOWN') AS down_count
         FROM post p
         LEFT JOIN member m ON m.id = p.author_id
         <include refid="filter"/>
@@ -46,6 +47,24 @@
         LIMIT #{size} OFFSET #{offset}
     </select>
 
+    <!-- 인기 글: 등록 #{hours}시간 이내 + 추천 #{minUp}건 이상, 추천 많은 순 #{limit}건 (상단 노출용) -->
+    <select id="findHotPosts" resultType="com.sb.web.board.dto.PostSummary">
+        SELECT
+            p.id, p.title, p.author_id, p.author_name, p.view_count, p.blocked, p.notice, p.created_at,
+            m.google_picture AS author_google_picture, m.profile_image AS author_profile_image,
+            (SELECT COUNT(*) FROM comment c WHERE c.post_id = p.id) AS comment_count,
+            (SELECT COUNT(*) FROM post_vote v WHERE v.post_id = p.id AND v.vote_type = 'UP') AS up_count,
+            (SELECT COUNT(*) FROM post_vote v WHERE v.post_id = p.id AND v.vote_type = 'DOWN') AS down_count
+        FROM post p
+        LEFT JOIN member m ON m.id = p.author_id
+        WHERE p.notice = 0
+          AND (#{category} IS NULL OR p.category = #{category})
+          AND p.created_at >= NOW() - INTERVAL #{hours} HOUR
+          AND (SELECT COUNT(*) FROM post_vote v WHERE v.post_id = p.id AND v.vote_type = 'UP') >= #{minUp}
+        ORDER BY (SELECT COUNT(*) FROM post_vote v WHERE v.post_id = p.id AND v.vote_type = 'UP') DESC, p.id DESC
+        LIMIT #{limit}
+    </select>
+
     <select id="countPage" resultType="long">
         SELECT COUNT(*)
         FROM post p