refactor: update repository interfaces and improve dependency injection

- Refactored repository structures to use interfaces instead of concrete types, enhancing flexibility and testability.
- Updated various repository methods to accept interfaces, allowing for better dependency management.
- Modified wire generation to accommodate new repository interfaces, ensuring proper service injection throughout the application.
- Enhanced handler methods to utilize DTOs for filtering and data handling, improving code clarity and maintainability.

internal/repository/vote_repo.go

@@ -7,18 +7,29 @@ import (
 	"gorm.io/gorm"
 )
 
-// VoteRepository 投票仓储
-type VoteRepository struct {
+// VoteRepository 投票仓储接口
+type VoteRepository interface {
+	CreateOptions(postID string, options []string) error
+	GetOptionsByPostID(postID string) ([]model.VoteOption, error)
+	Vote(postID, userID, optionID string) error
+	Unvote(postID, userID string) error
+	GetUserVote(postID, userID string) (*model.UserVote, error)
+	UpdateOption(optionID, content string) error
+	DeleteOptionsByPostID(postID string) error
+}
+
+// voteRepository 投票仓储实现
+type voteRepository struct {
 	db *gorm.DB
 }
 
 // NewVoteRepository 创建投票仓储
-func NewVoteRepository(db *gorm.DB) *VoteRepository {
-	return &VoteRepository{db: db}
+func NewVoteRepository(db *gorm.DB) VoteRepository {
+	return &voteRepository{db: db}
 }
 
 // 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 {
+func (r *voteRepository) CreateOptions(postID string, options []string) error {
 	if len(options) == 0 {
 		return nil
 	}
@@ -38,14 +49,14 @@ func (r *VoteRepository) CreateOptions(postID string, options []string) error {
 }
 
 // GetOptionsByPostID 获取帖子的所有投票选项
-func (r *VoteRepository) GetOptionsByPostID(postID string) ([]model.VoteOption, error) {
+func (r *voteRepository) GetOptionsByPostID(postID string) ([]model.VoteOption, error) {
 	var options []model.VoteOption
 	err := r.db.Where("post_id = ?", postID).Order("sort_order ASC").Find(&options).Error
 	return options, err
 }
 
 // Vote 用户投票
-func (r *VoteRepository) Vote(postID, userID, optionID string) error {
+func (r *voteRepository) Vote(postID, userID, optionID string) error {
 	return r.db.Transaction(func(tx *gorm.DB) error {
 		// 检查用户是否已投票
 		var existing model.UserVote
@@ -83,7 +94,7 @@ func (r *VoteRepository) Vote(postID, userID, optionID string) error {
 }
 
 // Unvote 取消投票
-func (r *VoteRepository) Unvote(postID, userID string) error {
+func (r *voteRepository) Unvote(postID, userID string) error {
 	return r.db.Transaction(func(tx *gorm.DB) error {
 		// 获取用户的投票记录
 		var userVote model.UserVote
@@ -112,7 +123,7 @@ func (r *VoteRepository) Unvote(postID, userID string) error {
 }
 
 // GetUserVote 获取用户在指定帖子的投票
-func (r *VoteRepository) GetUserVote(postID, userID string) (*model.UserVote, error) {
+func (r *voteRepository) GetUserVote(postID, userID string) (*model.UserVote, error) {
 	var userVote model.UserVote
 	err := r.db.Where("post_id = ? AND user_id = ?", postID, userID).First(&userVote).Error
 	if err != nil {
@@ -125,13 +136,13 @@ func (r *VoteRepository) GetUserVote(postID, userID string) (*model.UserVote, er
 }
 
 // UpdateOption 更新选项内容
-func (r *VoteRepository) UpdateOption(optionID, content string) error {
+func (r *voteRepository) UpdateOption(optionID, content string) error {
 	return r.db.Model(&model.VoteOption{}).Where("id = ?", optionID).
 		Update("content", content).Error
 }
 
 // DeleteOptionsByPostID 删除帖子的所有投票选项
-func (r *VoteRepository) DeleteOptionsByPostID(postID string) error {
+func (r *voteRepository) DeleteOptionsByPostID(postID string) error {
 	return r.db.Transaction(func(tx *gorm.DB) error {
 		// 删除关联的用户投票记录
 		if err := tx.Where("post_id = ?", postID).Delete(&model.UserVote{}).Error; err != nil {