fix: 修复关注/粉丝列表隐私检查假阳性导致本人也无法访问

- follow_repo.go: GetFollowListPublic 改用显式 WHERE uid=? 避免 GORM 主键解析潜在问题
- follow_service.go: GetFollowListPublic 失败时默认公开并记录日志，而非返回错误
- follow_controller.go: 错误兜底时 Accessible 默认 true，避免误锁用户

internal/repository/follow_repo.go

@@ -106,7 +106,10 @@ func (r *FollowRepo) IncrFollowingCount(userID uint, delta int) error {
 
 // GetFollowListPublic 查询用户关注列表公开性
 func (r *FollowRepo) GetFollowListPublic(userID uint) (bool, error) {
-	var user model.User
-	err := r.db.Select("follow_list_public").First(&user, userID).Error
-	return user.FollowListPublic, err
+	var listPublic bool
+	err := r.db.Model(&model.User{}).
+		Select("follow_list_public").
+		Where("uid = ?", userID).
+		Scan(&listPublic).Error
+	return listPublic, err
 }