feat: 게시판 신고 — 누적 5건 시 블라인드(관리자만 열람)

- report 테이블(회원당 대상별 1회), comment.blocked 컬럼
- POST /board/posts|comments/{id}/report, 본인 글/댓글 신고 불가
- 글: 5건이면 blocked(기존 열람제한 재사용) / 댓글: blocked → 비관리자 본문 숨김
- 삭제·탈퇴 시 신고 정리

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

src/main/resources/db/board.sql

@@ -95,6 +95,22 @@ CREATE TABLE IF NOT EXISTS comment (
     KEY idx_comment_post (post_id)
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
 
+-- 댓글 신고 누적 블라인드 플래그 (멱등)
+ALTER TABLE comment ADD COLUMN IF NOT EXISTS blocked TINYINT(1) NOT NULL DEFAULT 0 COMMENT '신고 누적 블라인드';
+
+-- 신고 (글/댓글). 회원당 대상별 1회. 5건 누적 시 블라인드(관리자만 열람).
+CREATE TABLE IF NOT EXISTS report (
+    id          BIGINT       NOT NULL AUTO_INCREMENT,
+    target_type VARCHAR(10)  NOT NULL COMMENT 'POST / COMMENT',
+    target_id   BIGINT       NOT NULL,
+    member_id   BIGINT       NOT NULL COMMENT '신고자',
+    reason      VARCHAR(255) NULL,
+    created_at  DATETIME     NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    PRIMARY KEY (id),
+    UNIQUE KEY uk_report (target_type, target_id, member_id),
+    KEY idx_report_target (target_type, target_id)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
+
 -- 게시글 추천/비추천 (회원당 1표, UP/DOWN). 같은 표 재요청 시 취소, 반대면 전환.
 CREATE TABLE IF NOT EXISTS post_vote (
     post_id    BIGINT     NOT NULL,

src/main/resources/mapper/CommentMapper.xml

@@ -11,11 +11,12 @@
         <result property="authorGooglePicture" column="author_google_picture"/>
         <result property="authorProfileImage" column="author_profile_image"/>
         <result property="content" column="content"/>
+        <result property="blocked" column="blocked"/>
         <result property="createdAt" column="created_at"/>
     </resultMap>
 
     <select id="findByPostId" parameterType="long" resultMap="commentResultMap">
-        SELECT c.id, c.post_id, c.author_id, c.author_name, c.content, c.created_at,
+        SELECT c.id, c.post_id, c.author_id, c.author_name, c.content, c.blocked, c.created_at,
                m.google_picture AS author_google_picture, m.profile_image AS author_profile_image
         FROM comment c
         LEFT JOIN member m ON m.id = c.author_id
@@ -24,13 +25,17 @@
     </select>
 
     <select id="findById" parameterType="long" resultMap="commentResultMap">
-        SELECT c.id, c.post_id, c.author_id, c.author_name, c.content, c.created_at,
+        SELECT c.id, c.post_id, c.author_id, c.author_name, c.content, c.blocked, c.created_at,
                m.google_picture AS author_google_picture, m.profile_image AS author_profile_image
         FROM comment c
         LEFT JOIN member m ON m.id = c.author_id
         WHERE c.id = #{id}
     </select>
 
+    <update id="updateBlocked">
+        UPDATE comment SET blocked = #{blocked} WHERE id = #{id}
+    </update>
+
     <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/ReportMapper.xml

@@ -0,0 +1,23 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
+        "https://mybatis.org/dtd/mybatis-3-mapper.dtd">
+<mapper namespace="com.sb.web.board.mapper.ReportMapper">
+
+    <insert id="insertIgnore">
+        INSERT IGNORE INTO report (target_type, target_id, member_id, reason, created_at)
+        VALUES (#{targetType}, #{targetId}, #{memberId}, #{reason}, NOW())
+    </insert>
+
+    <select id="countByTarget" resultType="int">
+        SELECT COUNT(*) FROM report WHERE target_type = #{targetType} AND target_id = #{targetId}
+    </select>
+
+    <delete id="deleteByTarget">
+        DELETE FROM report WHERE target_type = #{targetType} AND target_id = #{targetId}
+    </delete>
+
+    <delete id="deleteByMember">
+        DELETE FROM report WHERE member_id = #{memberId}
+    </delete>
+
+</mapper>

src/main/resources/mapper/WithdrawMapper.xml

@@ -52,7 +52,10 @@
         DELETE FROM board_image WHERE member_id = #{memberId}
     </delete>
 
-    <!-- 포인트 / 결제 / 세션 -->
+    <!-- 신고 / 포인트 / 결제 / 세션 -->
+    <delete id="deleteReportsByMember">
+        DELETE FROM report WHERE member_id = #{memberId}
+    </delete>
     <delete id="deletePointHistory">
         DELETE FROM point_history WHERE member_id = #{memberId}
     </delete>