feat(repository): enhance repository methods with batch processing and transaction support

- Updated Like and Unlike methods in CommentRepository to use transactions for data consistency.
- Introduced IsLikedBatch method for batch checking if comments are liked, addressing N+1 query issues.
- Enhanced BatchDelete method in PostRepository to perform batch deletions within a single transaction, improving efficiency.
- Added BatchUpdateStatus method for posts to utilize a single SQL update for status changes, reducing database load.
- Implemented BatchUpdateSortOrder in StickerRepository using CASE WHEN for efficient sorting updates.
- Added IsFollowingBatch and IsBlockedBatch methods in UserRepository for batch checking follow and block relationships, optimizing performance.

internal/repository/vote_repo.go

@@ -17,21 +17,24 @@ func NewVoteRepository(db *gorm.DB) *VoteRepository {
 	return &VoteRepository{db: db}
 }
 
-// CreateOptions 批量创建投票选项
+// CreateOptions 批量创建投票选项（使用批量插入，避免 N+1 问题）
 func (r *VoteRepository) CreateOptions(postID string, options []string) error {
-	return r.db.Transaction(func(tx *gorm.DB) error {
-		for i, content := range options {
-			option := &model.VoteOption{
-				PostID:    postID,
-				Content:   content,
-				SortOrder: i,
-			}
-			if err := tx.Create(option).Error; err != nil {
-				return err
-			}
-		}
+	if len(options) == 0 {
 		return nil
-	})
+	}
+
+	// 构建批量插入的选项切片
+	voteOptions := make([]model.VoteOption, len(options))
+	for i, content := range options {
+		voteOptions[i] = model.VoteOption{
+			PostID:    postID,
+			Content:   content,
+			SortOrder: i,
+		}
+	}
+
+	// 使用 GORM 的 Create 方法批量插入
+	return r.db.CreateInBatches(voteOptions, 100).Error
 }
 
 // GetOptionsByPostID 获取帖子的所有投票选项
@@ -58,9 +61,9 @@ func (r *VoteRepository) Vote(postID, userID, optionID string) error {
 		// 验证选项是否属于该帖子
 		var option model.VoteOption
 		if err := tx.Where("id = ? AND post_id = ?", optionID, postID).First(&option).Error; err != nil {
-			if err == gorm.ErrRecordNotFound {
-				return errors.New("invalid option")
-			}
+		if errors.Is(err, gorm.ErrRecordNotFound) {
+			return errors.New("invalid option")
+		}
 			return err
 		}
 
@@ -86,9 +89,9 @@ func (r *VoteRepository) Unvote(postID, userID string) error {
 		var userVote model.UserVote
 		err := tx.Where("post_id = ? AND user_id = ?", postID, userID).First(&userVote).Error
 		if err != nil {
-			if err == gorm.ErrRecordNotFound {
-				return nil // 没有投票记录，直接返回
-			}
+		if errors.Is(err, gorm.ErrRecordNotFound) {
+			return nil // 没有投票记录，直接返回
+		}
 			return err
 		}
 
@@ -113,7 +116,7 @@ func (r *VoteRepository) GetUserVote(postID, userID string) (*model.UserVote, er
 	var userVote model.UserVote
 	err := r.db.Where("post_id = ? AND user_id = ?", postID, userID).First(&userVote).Error
 	if err != nil {
-		if err == gorm.ErrRecordNotFound {
+		if errors.Is(err, gorm.ErrRecordNotFound) {
 			return nil, nil
 		}
 		return nil, err