feat: 내 글/댓글 모아보기 API

- GET /board/my/posts, /board/my/comments (페이징)
- PostSummary 에 category 추가, MyCommentResponse(글 제목·카테고리 포함)

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

src/main/resources/mapper/CommentMapper.xml

@@ -36,6 +36,19 @@
         UPDATE comment SET blocked = #{blocked} WHERE id = #{id}
     </update>
 
+    <select id="findMyPage" resultType="com.sb.web.board.dto.MyCommentResponse">
+        SELECT c.id, c.content, c.created_at, p.id AS post_id, p.title AS post_title, p.category
+        FROM comment c
+        JOIN post p ON p.id = c.post_id
+        WHERE c.author_id = #{memberId}
+        ORDER BY c.id DESC
+        LIMIT #{size} OFFSET #{offset}
+    </select>
+
+    <select id="countMyComments" parameterType="long" resultType="long">
+        SELECT COUNT(*) FROM comment WHERE author_id = #{memberId}
+    </select>
+
     <insert id="insert" parameterType="com.sb.web.board.domain.Comment"
             useGeneratedKeys="true" keyProperty="id">
         INSERT INTO comment (post_id, author_id, author_name, content, created_at)

src/main/resources/mapper/PostMapper.xml

@@ -71,6 +71,25 @@
         <include refid="filter"/>
     </select>
 
+    <!-- 내 글 모아보기 -->
+    <select id="findMyPage" resultType="com.sb.web.board.dto.PostSummary">
+        SELECT
+            p.id, p.title, p.category, 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.author_id = #{memberId}
+        ORDER BY p.id DESC
+        LIMIT #{size} OFFSET #{offset}
+    </select>
+
+    <select id="countMyPosts" parameterType="long" resultType="long">
+        SELECT COUNT(*) FROM post WHERE author_id = #{memberId}
+    </select>
+
     <select id="findById" parameterType="long" resultType="com.sb.web.board.domain.Post">
         SELECT p.id, p.title, p.content, p.author_id, p.author_name, p.view_count,
                p.blocked, p.block_reason, p.notice, p.category, p.created_at, p.updated_at,