feat(admin): 신고(피신고자 관리) + 블랙리스트 + Redis 내성

- V8: reports, blacklist 테이블 + 엔티티/리포지토리
- 신고 접수 POST /api/reports (로그인 사용자)
- 관리자: 피신고자 집계·개별 신고 조회·상태변경(RESOLVED/DISMISSED)
- 블랙리스트: 목록/추가(회원→BANNED+세션무효화, 또는 이메일)/해제, 소셜 재가입 차단(create-branch)
- CheckInRedisStore: Redis 미가동/장애 시 실시간 노출만 생략하고 정상 동작(관리자·로컬은 Redis 불필요)

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

src/main/java/com/dog/dognation/admin/AdminBlacklistController.java

@@ -0,0 +1,46 @@
+package com.dog.dognation.admin;
+
+import com.dog.dognation.admin.dto.BlacklistRequest;
+import com.dog.dognation.admin.dto.BlacklistResponse;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.DeleteMapping;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+import java.util.List;
+
+/**
+ * 관리자 블랙리스트 관리 API. (/api/admin/blacklist — ADMIN 전용)
+ */
+@RestController
+@RequestMapping("/api/admin/blacklist")
+public class AdminBlacklistController {
+
+    private final AdminBlacklistService blacklistService;
+
+    public AdminBlacklistController(AdminBlacklistService blacklistService) {
+        this.blacklistService = blacklistService;
+    }
+
+    @GetMapping
+    public List<BlacklistResponse> list() {
+        return blacklistService.list();
+    }
+
+    @PostMapping
+    public ResponseEntity<Void> add(@RequestBody BlacklistRequest req) {
+        blacklistService.add(req);
+        return ResponseEntity.status(HttpStatus.CREATED).build();
+    }
+
+    @DeleteMapping("/{id}")
+    public ResponseEntity<Void> remove(@PathVariable Long id) {
+        blacklistService.remove(id);
+        return ResponseEntity.noContent().build();
+    }
+}

src/main/java/com/dog/dognation/admin/AdminBlacklistService.java

@@ -0,0 +1,79 @@
+package com.dog.dognation.admin;
+
+import com.dog.dognation.admin.dto.BlacklistRequest;
+import com.dog.dognation.admin.dto.BlacklistResponse;
+import com.dog.dognation.common.exception.ApiException;
+import com.dog.dognation.domain.auth.AuthSessionRepository;
+import com.dog.dognation.domain.report.Blacklist;
+import com.dog.dognation.domain.report.BlacklistRepository;
+import com.dog.dognation.domain.user.User;
+import com.dog.dognation.domain.user.UserRepository;
+import org.springframework.http.HttpStatus;
+import org.springframework.jdbc.core.JdbcTemplate;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+
+import java.time.OffsetDateTime;
+import java.util.List;
+
+/**
+ * 관리자 블랙리스트 관리. 회원 차단 시 상태를 BANNED 로 바꾸고 세션을 무효화하며,
+ * 이메일은 소셜 재가입 차단 키로 저장된다.
+ */
+@Service
+public class AdminBlacklistService {
+
+    private final BlacklistRepository blacklistRepository;
+    private final UserRepository userRepository;
+    private final AuthSessionRepository sessionRepository;
+    private final JdbcTemplate jdbc;
+
+    public AdminBlacklistService(BlacklistRepository blacklistRepository,
+                                 UserRepository userRepository,
+                                 AuthSessionRepository sessionRepository,
+                                 JdbcTemplate jdbc) {
+        this.blacklistRepository = blacklistRepository;
+        this.userRepository = userRepository;
+        this.sessionRepository = sessionRepository;
+        this.jdbc = jdbc;
+    }
+
+    @Transactional(readOnly = true)
+    public List<BlacklistResponse> list() {
+        return jdbc.query("""
+                SELECT b.id, b.user_id, b.email, u.nickname, b.reason, b.created_at
+                  FROM blacklist b LEFT JOIN users u ON b.user_id = u.id
+                 ORDER BY b.created_at DESC
+                """, (rs, i) -> new BlacklistResponse(
+                rs.getLong("id"),
+                (Long) rs.getObject("user_id"),
+                rs.getString("email"),
+                rs.getString("nickname"),
+                rs.getString("reason"),
+                rs.getObject("created_at", OffsetDateTime.class)));
+    }
+
+    /** 회원(userId) 또는 이메일 차단. 회원이면 BANNED + 세션 무효화. */
+    @Transactional
+    public void add(BlacklistRequest req) {
+        if (req.userId() != null) {
+            User user = userRepository.findById(req.userId())
+                    .orElseThrow(() -> new ApiException(HttpStatus.NOT_FOUND, "회원을 찾을 수 없습니다."));
+            blacklistRepository.save(new Blacklist(user.getId(), user.getEmail(), req.reason()));
+            user.setStatus("BANNED");
+            sessionRepository.deleteByUserId(user.getId());
+        } else if (req.email() != null && !req.email().isBlank()) {
+            blacklistRepository.save(new Blacklist(null, req.email().trim(), req.reason()));
+        } else {
+            throw new ApiException(HttpStatus.BAD_REQUEST, "회원 또는 이메일을 지정하세요.");
+        }
+    }
+
+    @Transactional
+    public void remove(Long id) {
+        if (!blacklistRepository.existsById(id)) {
+            throw new ApiException(HttpStatus.NOT_FOUND, "블랙리스트 항목을 찾을 수 없습니다.");
+        }
+        blacklistRepository.deleteById(id);
+    }
+}

src/main/java/com/dog/dognation/admin/AdminReportController.java

@@ -0,0 +1,49 @@
+package com.dog.dognation.admin;
+
+import com.dog.dognation.admin.dto.ReportResponse;
+import com.dog.dognation.admin.dto.ReportStatusRequest;
+import com.dog.dognation.admin.dto.ReportedUserSummary;
+import jakarta.validation.Valid;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.PutMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.bind.annotation.RestController;
+
+import java.util.List;
+
+/**
+ * 관리자 신고/피신고자 관리 API. (/api/admin/reports — ADMIN 전용)
+ */
+@RestController
+@RequestMapping("/api/admin/reports")
+public class AdminReportController {
+
+    private final AdminReportService reportService;
+
+    public AdminReportController(AdminReportService reportService) {
+        this.reportService = reportService;
+    }
+
+    /** 피신고자 집계 목록. */
+    @GetMapping("/reported-users")
+    public List<ReportedUserSummary> reportedUsers() {
+        return reportService.reportedUsers();
+    }
+
+    /** 특정 피신고자의 신고 목록. */
+    @GetMapping
+    public List<ReportResponse> byUser(@RequestParam Long reportedUserId) {
+        return reportService.byUser(reportedUserId);
+    }
+
+    @PutMapping("/{id}/status")
+    public ResponseEntity<Void> updateStatus(@PathVariable Long id,
+                                             @Valid @RequestBody ReportStatusRequest req) {
+        reportService.updateStatus(id, req.status());
+        return ResponseEntity.noContent().build();
+    }
+}

src/main/java/com/dog/dognation/admin/AdminReportService.java

@@ -0,0 +1,102 @@
+package com.dog.dognation.admin;
+
+import com.dog.dognation.admin.dto.ReportResponse;
+import com.dog.dognation.admin.dto.ReportedUserSummary;
+import com.dog.dognation.common.exception.ApiException;
+import com.dog.dognation.domain.report.Report;
+import com.dog.dognation.domain.report.ReportRepository;
+import org.springframework.http.HttpStatus;
+import org.springframework.jdbc.core.JdbcTemplate;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+
+import java.time.OffsetDateTime;
+import java.util.ArrayList;
+import java.util.LinkedHashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+
+/**
+ * 관리자 신고 관리 — 피신고자 집계 + 개별 신고 조회/처리.
+ */
+@Service
+public class AdminReportService {
+
+    private static final Set<String> STATUSES = Set.of("PENDING", "RESOLVED", "DISMISSED");
+
+    private final JdbcTemplate jdbc;
+    private final ReportRepository reportRepository;
+
+    public AdminReportService(JdbcTemplate jdbc, ReportRepository reportRepository) {
+        this.jdbc = jdbc;
+        this.reportRepository = reportRepository;
+    }
+
+    /** 미처리 우선 정렬. */
+    private static final class Acc {
+        String email, nickname, status;
+        long total, pending;
+        OffsetDateTime last;
+        final List<String> reasons = new ArrayList<>();
+    }
+
+    /** 피신고자별 집계 (미처리 많은 순). */
+    @Transactional(readOnly = true)
+    public List<ReportedUserSummary> reportedUsers() {
+        Map<Long, Acc> map = new LinkedHashMap<>();
+        jdbc.query("""
+                SELECT r.reported_user_id AS uid, u.email, u.nickname, u.status AS ustatus,
+                       r.reason, r.status AS rstatus, r.created_at
+                  FROM reports r JOIN users u ON r.reported_user_id = u.id
+                 ORDER BY r.created_at DESC
+                """, rs -> {
+            long uid = rs.getLong("uid");
+            Acc a = map.computeIfAbsent(uid, k -> new Acc());
+            a.email = rs.getString("email");
+            a.nickname = rs.getString("nickname");
+            a.status = rs.getString("ustatus");
+            a.total++;
+            if ("PENDING".equals(rs.getString("rstatus"))) a.pending++;
+            OffsetDateTime at = rs.getObject("created_at", OffsetDateTime.class);
+            if (a.last == null || (at != null && at.isAfter(a.last))) a.last = at;
+            String reason = rs.getString("reason");
+            if (!a.reasons.contains(reason)) a.reasons.add(reason);
+        });
+
+        return map.entrySet().stream()
+                .map(e -> new ReportedUserSummary(e.getKey(), e.getValue().email, e.getValue().nickname,
+                        e.getValue().status, e.getValue().total, e.getValue().pending,
+                        e.getValue().last, e.getValue().reasons))
+                .sorted((x, y) -> {
+                    int c = Long.compare(y.pendingReports(), x.pendingReports());
+                    return c != 0 ? c : Long.compare(y.totalReports(), x.totalReports());
+                })
+                .toList();
+    }
+
+    /** 특정 피신고자의 개별 신고 목록. */
+    @Transactional(readOnly = true)
+    public List<ReportResponse> byUser(Long reportedUserId) {
+        return jdbc.query("""
+                SELECT r.id, ru.nickname AS reporter, r.target_type, r.reason, r.detail,
+                       r.status, r.created_at
+                  FROM reports r LEFT JOIN users ru ON r.reporter_id = ru.id
+                 WHERE r.reported_user_id = ?
+                 ORDER BY r.created_at DESC
+                """, (rs, i) -> new ReportResponse(
+                rs.getLong("id"), rs.getString("reporter"), rs.getString("target_type"),
+                rs.getString("reason"), rs.getString("detail"), rs.getString("status"),
+                rs.getObject("created_at", OffsetDateTime.class)), reportedUserId);
+    }
+
+    @Transactional
+    public void updateStatus(Long reportId, String status) {
+        if (!STATUSES.contains(status)) {
+            throw new ApiException(HttpStatus.BAD_REQUEST, "유효하지 않은 상태입니다.");
+        }
+        Report report = reportRepository.findById(reportId)
+                .orElseThrow(() -> new ApiException(HttpStatus.NOT_FOUND, "신고를 찾을 수 없습니다."));
+        report.updateStatus(status);
+    }
+}

src/main/java/com/dog/dognation/admin/dto/BlacklistRequest.java

@@ -0,0 +1,5 @@
+package com.dog.dognation.admin.dto;
+
+/** 블랙리스트 추가 — userId(회원 차단) 또는 email(이메일 차단) 중 하나. */
+public record BlacklistRequest(Long userId, String email, String reason) {
+}

src/main/java/com/dog/dognation/admin/dto/BlacklistResponse.java

@@ -0,0 +1,13 @@
+package com.dog.dognation.admin.dto;
+
+import java.time.OffsetDateTime;
+
+/** 블랙리스트 항목 (관리자). */
+public record BlacklistResponse(
+        Long id,
+        Long userId,
+        String email,
+        String nickname,
+        String reason,
+        OffsetDateTime createdAt) {
+}

src/main/java/com/dog/dognation/admin/dto/ReportResponse.java

@@ -0,0 +1,14 @@
+package com.dog.dognation.admin.dto;
+
+import java.time.OffsetDateTime;
+
+/** 개별 신고 항목 (관리자). */
+public record ReportResponse(
+        Long id,
+        String reporter,
+        String targetType,
+        String reason,
+        String detail,
+        String status,
+        OffsetDateTime createdAt) {
+}

src/main/java/com/dog/dognation/admin/dto/ReportStatusRequest.java

@@ -0,0 +1,7 @@
+package com.dog.dognation.admin.dto;
+
+import jakarta.validation.constraints.NotBlank;
+
+/** 신고 처리 상태 변경 — RESOLVED / DISMISSED / PENDING. */
+public record ReportStatusRequest(@NotBlank(message = "상태를 입력하세요.") String status) {
+}

src/main/java/com/dog/dognation/admin/dto/ReportedUserSummary.java

@@ -0,0 +1,16 @@
+package com.dog.dognation.admin.dto;
+
+import java.time.OffsetDateTime;
+import java.util.List;
+
+/** 피신고자 요약 — 회원 + 신고 집계. */
+public record ReportedUserSummary(
+        Long userId,
+        String email,
+        String nickname,
+        String status,
+        long totalReports,
+        long pendingReports,
+        OffsetDateTime lastReportedAt,
+        List<String> reasons) {
+}

src/main/java/com/dog/dognation/auth/AuthService.java

@@ -40,6 +40,7 @@ public class AuthService {
     private final UserRepository userRepository;
     private final AuthSessionRepository sessionRepository;
     private final AppleTokenVerifier appleTokenVerifier;
+    private final com.dog.dognation.domain.report.BlacklistRepository blacklistRepository;
     private final RestClient restClient = RestClient.create();
 
     /** 구글 OAuth 클라이언트 ID (ID 토큰 aud 검증용). 미설정 시 구글 로그인 비활성. */
@@ -52,10 +53,19 @@ public class AuthService {
 
     public AuthService(UserRepository userRepository,
                        AuthSessionRepository sessionRepository,
-                       AppleTokenVerifier appleTokenVerifier) {
+                       AppleTokenVerifier appleTokenVerifier,
+                       com.dog.dognation.domain.report.BlacklistRepository blacklistRepository) {
         this.userRepository = userRepository;
         this.sessionRepository = sessionRepository;
         this.appleTokenVerifier = appleTokenVerifier;
+        this.blacklistRepository = blacklistRepository;
+    }
+
+    /** 블랙리스트(이메일) 재가입 차단. */
+    private void ensureNotBlacklisted(String email) {
+        if (email != null && !email.isBlank() && blacklistRepository.existsByEmail(email)) {
+            throw new ApiException(HttpStatus.FORBIDDEN, "차단된 계정입니다.");
+        }
     }
 
     public String googleClientId() {
@@ -106,6 +116,7 @@ public class AuthService {
         }
 
         if (user == null) {
+            ensureNotBlacklisted(email);
             user = userRepository.save(User.createSocial("GOOGLE", sub, email, name, picture));
             log.info("[google] new user id={} email={}", user.getId(), email);
         }
@@ -172,6 +183,7 @@ public class AuthService {
         }
 
         if (user == null) {
+            ensureNotBlacklisted(email);
             user = userRepository.save(User.createSocial("APPLE", sub, email, name, null));
             log.info("[apple] new user id={} email={}", user.getId(), email);
         }

src/main/java/com/dog/dognation/config/StatsSeedData.java

@@ -77,10 +77,37 @@ public class StatsSeedData implements CommandLineRunner {
         insertWithdrawal("left4@dog.com", "AD_FREE", now.minusDays(4));
         insertWithdrawal("left5@dog.com", "FREE", now.minusDays(6));
 
+        // 신고 (피신고자: visitor4, visitor5, visitor3)
+        insertReport(users.get(0), users.get(3), "SPAM", "도배성 매칭 신청 반복", "PENDING");
+        insertReport(users.get(1), users.get(3), "ABUSE", "채팅에서 욕설", "PENDING");
+        insertReport(users.get(2), users.get(3), "INAPPROPRIATE", "부적절한 프로필 사진", "PENDING");
+        insertReport(users.get(0), users.get(4), "FRAUD", "허위 정보", "PENDING");
+        insertReport(users.get(2), users.get(4), "ABUSE", "비방", "RESOLVED");
+        insertReport(users.get(5), users.get(2), "ETC", "기타", "DISMISSED");
+
+        // 블랙리스트 (이메일 재가입 차단)
+        insertBlacklist("banned1@dog.com", "스팸 반복으로 영구 차단");
+        insertBlacklist("banned2@dog.com", "결제 사기");
+
         System.out.printf("[stats seed] 스팟 %d, 방문자 %d, 체크인 %d 준비 완료%n",
                 spots.length, users.size(), total);
     }
 
+    private void insertReport(long reporterId, long reportedUserId, String reason, String detail, String status) {
+        OffsetDateTime resolvedAt = "PENDING".equals(status) ? null : OffsetDateTime.now();
+        jdbc.update("""
+                INSERT INTO reports(reporter_id, reported_user_id, target_type, reason, detail, status, created_at, resolved_at)
+                VALUES (?, ?, 'USER', ?, ?, ?, CURRENT_TIMESTAMP, ?)
+                """, reporterId, reportedUserId, reason, detail, status, resolvedAt);
+    }
+
+    private void insertBlacklist(String email, String reason) {
+        jdbc.update("""
+                INSERT INTO blacklist(user_id, email, reason, created_at)
+                VALUES (NULL, ?, ?, CURRENT_TIMESTAMP)
+                """, email, reason);
+    }
+
     private long insertUser(String email, String nickname, String tier) {
         jdbc.update("""
                 INSERT INTO users(email, nickname, subscription_tier, status, role, provider, created_at, updated_at)

src/main/java/com/dog/dognation/config/WebConfig.java

@@ -42,7 +42,7 @@ public class WebConfig implements WebMvcConfigurer {
         // 인증: 로그인 필요한 경로 (관리자 경로 포함 — SessionUser 세팅용으로 먼저 실행)
         registry.addInterceptor(authInterceptor)
                 .addPathPatterns("/api/auth/me", "/api/auth/logout", "/api/admin/**",
-                        "/api/dogs/**", "/api/chat/**");
+                        "/api/dogs/**", "/api/chat/**", "/api/reports");
         // 인가: 관리자 전용 (authInterceptor 다음에 실행되어 role 검사)
         registry.addInterceptor(adminInterceptor)
                 .addPathPatterns("/api/admin/**");

src/main/java/com/dog/dognation/domain/report/Blacklist.java

@@ -0,0 +1,48 @@
+package com.dog.dognation.domain.report;
+
+import jakarta.persistence.Column;
+import jakarta.persistence.Entity;
+import jakarta.persistence.GeneratedValue;
+import jakarta.persistence.GenerationType;
+import jakarta.persistence.Id;
+import jakarta.persistence.Table;
+
+import java.time.OffsetDateTime;
+
+/**
+ * 블랙리스트. 차단 회원/이메일 — 소셜 재가입 차단 및 관리자 조회용.
+ */
+@Entity
+@Table(name = "blacklist")
+public class Blacklist {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    private Long id;
+
+    @Column(name = "user_id")
+    private Long userId;
+
+    @Column(length = 255)
+    private String email;
+
+    @Column(length = 200)
+    private String reason;
+
+    @Column(name = "created_at", nullable = false)
+    private OffsetDateTime createdAt = OffsetDateTime.now();
+
+    protected Blacklist() {
+    }
+
+    public Blacklist(Long userId, String email, String reason) {
+        this.userId = userId;
+        this.email = email;
+        this.reason = reason;
+        this.createdAt = OffsetDateTime.now();
+    }
+
+    public Long getId() {
+        return id;
+    }
+}

src/main/java/com/dog/dognation/domain/report/BlacklistRepository.java

@@ -0,0 +1,8 @@
+package com.dog.dognation.domain.report;
+
+import org.springframework.data.jpa.repository.JpaRepository;
+
+public interface BlacklistRepository extends JpaRepository<Blacklist, Long> {
+
+    boolean existsByEmail(String email);
+}

src/main/java/com/dog/dognation/domain/report/Report.java

@@ -0,0 +1,81 @@
+package com.dog.dognation.domain.report;
+
+import jakarta.persistence.Column;
+import jakarta.persistence.Entity;
+import jakarta.persistence.GeneratedValue;
+import jakarta.persistence.GenerationType;
+import jakarta.persistence.Id;
+import jakarta.persistence.Table;
+
+import java.time.OffsetDateTime;
+
+/**
+ * 신고. 피신고자(reported_user_id) 기준으로 관리자가 관리한다.
+ */
+@Entity
+@Table(name = "reports")
+public class Report {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    private Long id;
+
+    @Column(name = "reporter_id")
+    private Long reporterId;              // 신고자(탈퇴 시 null)
+
+    @Column(name = "reported_user_id", nullable = false)
+    private Long reportedUserId;          // 피신고자
+
+    @Column(name = "target_type", nullable = false, length = 20)
+    private String targetType = "USER";   // USER / REVIEW / CHAT / DOG
+
+    @Column(name = "target_id")
+    private Long targetId;
+
+    @Column(nullable = false, length = 30)
+    private String reason;                // SPAM / ABUSE / INAPPROPRIATE / FRAUD / ETC
+
+    @Column(length = 500)
+    private String detail;
+
+    @Column(nullable = false, length = 20)
+    private String status = "PENDING";    // PENDING / RESOLVED / DISMISSED
+
+    @Column(name = "created_at", nullable = false)
+    private OffsetDateTime createdAt = OffsetDateTime.now();
+
+    @Column(name = "resolved_at")
+    private OffsetDateTime resolvedAt;
+
+    protected Report() {
+    }
+
+    public Report(Long reporterId, Long reportedUserId, String targetType, Long targetId,
+                  String reason, String detail) {
+        this.reporterId = reporterId;
+        this.reportedUserId = reportedUserId;
+        this.targetType = targetType == null ? "USER" : targetType;
+        this.targetId = targetId;
+        this.reason = reason;
+        this.detail = detail;
+        this.status = "PENDING";
+        this.createdAt = OffsetDateTime.now();
+    }
+
+    public void updateStatus(String status) {
+        this.status = status;
+        this.resolvedAt = "PENDING".equals(status) ? null : OffsetDateTime.now();
+    }
+
+    public Long getId() {
+        return id;
+    }
+
+    public Long getReportedUserId() {
+        return reportedUserId;
+    }
+
+    public String getStatus() {
+        return status;
+    }
+}

src/main/java/com/dog/dognation/domain/report/ReportRepository.java

@@ -0,0 +1,6 @@
+package com.dog.dognation.domain.report;
+
+import org.springframework.data.jpa.repository.JpaRepository;
+
+public interface ReportRepository extends JpaRepository<Report, Long> {
+}

src/main/java/com/dog/dognation/domain/spot/CheckInRedisStore.java

@@ -1,5 +1,7 @@
 package com.dog.dognation.domain.spot;
 
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 import org.springframework.data.redis.core.StringRedisTemplate;
 import org.springframework.stereotype.Component;
 
@@ -13,10 +15,15 @@ import java.util.Set;
  * 스팟별 ZSet(member=dogId, score=체크인 epoch초)으로 관리한다.
  *  - 조회 시 24시간이 지난 항목은 정리하고, 키에도 24h TTL 을 걸어 유휴 시 자동 삭제.
  *  - 영구 통계는 PostgreSQL check_ins 테이블이 담당(이 저장소와 별개).
+ *
+ * Redis 가 없거나 장애일 때는 실시간 노출만 비활성되고 나머지 기능은 정상 동작한다
+ * (예: local 프로파일에서 Redis 없이 기동). 관리자 기능은 Redis 에 의존하지 않는다.
  */
 @Component
 public class CheckInRedisStore {
 
+    private static final Logger log = LoggerFactory.getLogger(CheckInRedisStore.class);
+
     /** 실시간 체크인 유효시간. 이 시간이 지나면 활성 메이트에서 비노출. */
     static final Duration TTL = Duration.ofHours(24);
 
@@ -32,21 +39,31 @@ public class CheckInRedisStore {
 
     /** 체크인 기록 — dogId 를 현재 시각 점수로 추가하고 키 TTL 을 24h 로 갱신한다. */
     public void add(Long spotId, Long dogId) {
-        String k = key(spotId);
-        redis.opsForZSet().add(k, String.valueOf(dogId), Instant.now().getEpochSecond());
-        redis.expire(k, TTL);
+        try {
+            String k = key(spotId);
+            redis.opsForZSet().add(k, String.valueOf(dogId), Instant.now().getEpochSecond());
+            redis.expire(k, TTL);
+        } catch (RuntimeException e) {
+            // Redis 장애/미가동 → 실시간 노출만 생략(영구 통계는 DB가 담당)
+            log.warn("[checkin] Redis 기록 실패(무시): {}", e.toString());
+        }
     }
 
     /** 최근 24시간 내 체크인한 dogId 목록(최신순). 만료 항목은 조회 시 정리. */
     public List<Long> activeDogIds(Long spotId) {
-        String k = key(spotId);
-        double cutoff = Instant.now().minus(TTL).getEpochSecond();
-        redis.opsForZSet().removeRangeByScore(k, Double.NEGATIVE_INFINITY, cutoff);
-        Set<String> members = redis.opsForZSet()
-                .reverseRangeByScore(k, cutoff, Double.POSITIVE_INFINITY);
-        if (members == null || members.isEmpty()) {
+        try {
+            String k = key(spotId);
+            double cutoff = Instant.now().minus(TTL).getEpochSecond();
+            redis.opsForZSet().removeRangeByScore(k, Double.NEGATIVE_INFINITY, cutoff);
+            Set<String> members = redis.opsForZSet()
+                    .reverseRangeByScore(k, cutoff, Double.POSITIVE_INFINITY);
+            if (members == null || members.isEmpty()) {
+                return List.of();
+            }
+            return members.stream().map(Long::valueOf).toList();
+        } catch (RuntimeException e) {
+            log.warn("[checkin] Redis 조회 실패(무시): {}", e.toString());
             return List.of();
         }
-        return members.stream().map(Long::valueOf).toList();
     }
 }

src/main/java/com/dog/dognation/report/ReportController.java

@@ -0,0 +1,33 @@
+package com.dog.dognation.report;
+
+import com.dog.dognation.auth.SessionUser;
+import com.dog.dognation.auth.web.AuthInterceptor;
+import com.dog.dognation.report.dto.CreateReportRequest;
+import jakarta.validation.Valid;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestAttribute;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+/** 신고 접수 API (로그인 사용자). */
+@RestController
+@RequestMapping("/api/reports")
+public class ReportController {
+
+    private final ReportService reportService;
+
+    public ReportController(ReportService reportService) {
+        this.reportService = reportService;
+    }
+
+    @PostMapping
+    public ResponseEntity<Void> create(
+            @Valid @RequestBody CreateReportRequest req,
+            @RequestAttribute(AuthInterceptor.CURRENT_MEMBER) SessionUser current) {
+        reportService.create(current.id(), req);
+        return ResponseEntity.status(HttpStatus.CREATED).build();
+    }
+}

src/main/java/com/dog/dognation/report/ReportService.java

@@ -0,0 +1,36 @@
+package com.dog.dognation.report;
+
+import com.dog.dognation.common.exception.ApiException;
+import com.dog.dognation.domain.report.Report;
+import com.dog.dognation.domain.report.ReportRepository;
+import com.dog.dognation.domain.user.UserRepository;
+import com.dog.dognation.report.dto.CreateReportRequest;
+import org.springframework.http.HttpStatus;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+
+/** 신고 접수 (사용자). */
+@Service
+public class ReportService {
+
+    private final ReportRepository reportRepository;
+    private final UserRepository userRepository;
+
+    public ReportService(ReportRepository reportRepository, UserRepository userRepository) {
+        this.reportRepository = reportRepository;
+        this.userRepository = userRepository;
+    }
+
+    @Transactional
+    public void create(Long reporterId, CreateReportRequest req) {
+        if (reporterId != null && reporterId.equals(req.reportedUserId())) {
+            throw new ApiException(HttpStatus.BAD_REQUEST, "본인은 신고할 수 없습니다.");
+        }
+        if (!userRepository.existsById(req.reportedUserId())) {
+            throw new ApiException(HttpStatus.NOT_FOUND, "신고 대상 회원을 찾을 수 없습니다.");
+        }
+        reportRepository.save(new Report(
+                reporterId, req.reportedUserId(), req.targetType(), req.targetId(),
+                req.reason(), req.detail()));
+    }
+}

src/main/java/com/dog/dognation/report/dto/CreateReportRequest.java

@@ -0,0 +1,13 @@
+package com.dog.dognation.report.dto;
+
+import jakarta.validation.constraints.NotBlank;
+import jakarta.validation.constraints.NotNull;
+
+/** 신고 접수 요청 (신고자는 세션에서). */
+public record CreateReportRequest(
+        @NotNull(message = "피신고자를 지정하세요.") Long reportedUserId,
+        String targetType,
+        Long targetId,
+        @NotBlank(message = "신고 사유를 입력하세요.") String reason,
+        String detail) {
+}

src/main/resources/db/migration/V8__reports_blacklist.sql

@@ -0,0 +1,30 @@
+-- ============================================================
+--  V8: 신고(피신고자 관리) + 블랙리스트
+-- ============================================================
+
+-- 신고
+CREATE TABLE reports (
+    id               BIGINT GENERATED ALWAYS AS IDENTITY PRIMARY KEY,
+    reporter_id      BIGINT       REFERENCES users(id) ON DELETE SET NULL,   -- 신고자(탈퇴 시 NULL)
+    reported_user_id BIGINT       NOT NULL REFERENCES users(id) ON DELETE CASCADE, -- 피신고자
+    target_type      VARCHAR(20)  NOT NULL DEFAULT 'USER'
+                        CHECK (target_type IN ('USER', 'REVIEW', 'CHAT', 'DOG')),
+    target_id        BIGINT,                                                 -- 대상 콘텐츠 id(선택)
+    reason           VARCHAR(30)  NOT NULL,                                  -- SPAM/ABUSE/INAPPROPRIATE/FRAUD/ETC
+    detail           VARCHAR(500),
+    status           VARCHAR(20)  NOT NULL DEFAULT 'PENDING'
+                        CHECK (status IN ('PENDING', 'RESOLVED', 'DISMISSED')),
+    created_at       TIMESTAMPTZ  NOT NULL DEFAULT now(),
+    resolved_at      TIMESTAMPTZ
+);
+CREATE INDEX idx_reports_reported ON reports(reported_user_id, status);
+
+-- 블랙리스트 (차단 회원/이메일). 재가입 차단 및 관리자 조회용.
+CREATE TABLE blacklist (
+    id         BIGINT GENERATED ALWAYS AS IDENTITY PRIMARY KEY,
+    user_id    BIGINT,                    -- 삭제될 수 있어 FK 없음
+    email      VARCHAR(255),              -- 소셜 재가입 차단 키
+    reason     VARCHAR(200),
+    created_at TIMESTAMPTZ NOT NULL DEFAULT now()
+);
+CREATE INDEX idx_blacklist_email ON blacklist(email);