feat: postSeeder 추가

app-main/src/main/java/net/causw/app/main/domain/user/account/repository/user/UserRepository.java

@@ -75,4 +75,6 @@ Optional<User> findByPhoneNumber(
 	Boolean existsByStudentId(String studentId);
 
 	Optional<User> findByEmailAndName(String email, String name);
+
+    Optional<User> findTopBy();
 }

app-main/src/main/java/net/causw/app/main/shared/seed/BoardSeeder.java

@@ -0,0 +1,87 @@
+package net.causw.app.main.shared.seed;
+
+import jakarta.persistence.EntityManager;
+import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+import net.causw.app.main.domain.community.board.entity.Board;
+import net.causw.app.main.domain.community.board.entity.BoardApply;
+import net.causw.app.main.domain.community.board.entity.BoardApplyStatus;
+import net.causw.app.main.domain.community.board.repository.BoardApplyRepository;
+import net.causw.app.main.domain.community.board.repository.BoardRepository;
+import net.causw.app.main.domain.user.account.entity.user.User;
+import net.causw.app.main.domain.user.account.repository.user.UserRepository;
+import net.causw.global.constant.StaticValue;
+import org.springframework.context.annotation.Profile;
+import org.springframework.stereotype.Component;
+import org.springframework.transaction.annotation.Transactional;
+
+import java.util.List;
+
+@Component
+@Profile("seed")
+@RequiredArgsConstructor
+@Slf4j
+public class BoardSeeder {
+    private final EntityManager em;
+    private final BoardApplyRepository boardApplyRepository;
+    private final BoardRepository boardRepository;
+    private final UserRepository userRepository;
+
+    @Transactional
+    public void seed() {
+        if (boardRepository.count() > 0) {
+            log.warn("🚫 Seed skipped: boards already exist");
+            return;
+        }
+
+        User user = userRepository.findTopBy()
+                .orElseThrow(() -> new IllegalStateException("🚫 Seed skipped: User not found for seeding boards"));
+
+        process(user);
+    }
+
+    private void process(User user) {
+        // 게시판 카테고리 이름 예시 (20개)
+        List<String> boardNames = List.of(
+                "자유게시판", "익명게시판", "질문게시판", "정보공유", "취업게시판",
+                "동아리홍보", "스터디모집", "중고장터", "분실물센터", "학교생활",
+                "유머게시판", "건의사항", "컴공게시판", "학사공지", "장학공지",
+                "학생회 공지 게시판", "크자회 공지 게시판", "서비스 공지", "졸업생게시판", "새내기게시판"
+        );
+
+        int count = 0;
+        for (String name : boardNames) {
+            createActiveBoard(user, name, count++);
+        }
+
+        em.flush();
+        em.clear();
+
+        log.info("✅ Seeded {} boards completed.", boardNames.size());
+    }
+
+    private void createActiveBoard(User user, String name, int index) {
+        BoardApply boardApply = BoardApply.of( // 일반 게시판 신청
+                user,
+                name,
+                null,
+                StaticValue.BOARD_NAME_APP_FREE,
+                false,
+                null
+        );
+        boardApply.updateAcceptStatus(BoardApplyStatus.ACCEPTED);
+        this.boardApplyRepository.save(boardApply);
+        em.persist(boardApply);
+
+        Board newBoard = Board.of( // 일반 게시판 생성
+                boardApply.getBoardName(),
+                boardApply.getDescription(),
+                boardApply.getCategory(),
+                boardApply.getIsAnonymousAllowed(),
+                null
+        );
+
+        this.boardRepository.save(newBoard);
+        em.persist(newBoard);
+    }
+}

app-main/src/main/java/net/causw/app/main/shared/seed/PostSeedRunner.java

@@ -0,0 +1,26 @@
+package net.causw.app.main.shared.seed;
+
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.boot.CommandLineRunner;
+import org.springframework.context.annotation.Profile;
+import org.springframework.stereotype.Component;
+
+@Component
+@Profile("seed")
+@Slf4j
+public class PostSeedRunner implements CommandLineRunner {
+
+    private final BoardSeeder boardSeeder;
+
+    public PostSeedRunner(BoardSeeder boardSeeder) {
+        this.boardSeeder = boardSeeder;
+    }
+
+    @Override
+    public void run(String... args) {
+        log.info("🌱 Seeding data initialized...");
+        // NOTE: 유저 시딩 필수
+        boardSeeder.seed();
+        log.info("🌳 Seeding data finished.");
+    }
+}