feat: 添加日志管理和敏感词过滤功能

- 新增日志管理模块：操作日志、登录日志、数据变更日志
- 新增敏感词过滤器 (sanitizer)
- 新增日志异步写入管理器
- 新增日志定时清理服务
- 优化帖子相关服务和上传服务

internal/model/operation_log.go

@@ -0,0 +1,86 @@
+package model
+
+import (
+	"time"
+
+	"github.com/google/uuid"
+	"gorm.io/gorm"
+)
+
+// OperationType 操作类型
+type OperationType string
+
+const (
+	OpPostCreate      OperationType = "post:create"
+	OpPostUpdate      OperationType = "post:update"
+	OpPostDelete      OperationType = "post:delete"
+	OpCommentCreate   OperationType = "comment:create"
+	OpCommentDelete   OperationType = "comment:delete"
+	OpUserRegister    OperationType = "user:register"
+	OpUserLogin       OperationType = "user:login"
+	OpUserLogout      OperationType = "user:logout"
+	OpPasswordChange  OperationType = "password:change"
+	OpPasswordReset   OperationType = "password:reset"
+	OpProfileUpdate   OperationType = "profile:update"
+	OpAvatarUpload    OperationType = "avatar:upload"
+	OpEmailBind       OperationType = "email:bind"
+	OpPhoneBind       OperationType = "phone:bind"
+	OpAccountDelete   OperationType = "account:delete"
+	OpDataExport      OperationType = "data:export"
+	OpDataWithdraw    OperationType = "data:withdraw"
+	OpAdminBanUser    OperationType = "admin:ban_user"
+	OpAdminUnbanUser  OperationType = "admin:unban_user"
+	OpAdminDeletePost OperationType = "admin:delete_post"
+	OpAdminModifyRole OperationType = "admin:modify_role"
+	OpAdminMuteUser   OperationType = "admin:mute_user"
+	OpAdminUnmuteUser OperationType = "admin:unmute_user"
+)
+
+// OperationLog 操作日志实体
+type OperationLog struct {
+	ID           uint      `json:"id" gorm:"primaryKey;autoIncrement"`
+	TraceID      string    `json:"trace_id" gorm:"type:varchar(64);index:idx_trace"`
+	UserID       string    `json:"user_id" gorm:"type:varchar(36);index:idx_user"`
+	UserName     string    `json:"user_name" gorm:"type:varchar(100)"`
+	NickName     string    `json:"nick_name" gorm:"type:varchar(100)"`
+	Operation    string    `json:"operation" gorm:"type:varchar(50);index:idx_operation"`
+	Module       string    `json:"module" gorm:"type:varchar(50)"`
+	TargetType   string    `json:"target_type" gorm:"type:varchar(50)"`
+	TargetID     string    `json:"target_id" gorm:"type:varchar(255);index:idx_target"`
+	Method       string    `json:"method" gorm:"type:varchar(10)"`
+	Path         string    `json:"path" gorm:"type:varchar(500)"`
+	QueryParams  string    `json:"query_params" gorm:"type:text"`
+	RequestBody  string    `json:"request_body" gorm:"type:text"`
+	ResponseCode int       `json:"response_code" gorm:"index:idx_status"`
+	ResponseMsg  string    `json:"response_msg" gorm:"type:varchar(500)"`
+	IP           string    `json:"ip" gorm:"type:varchar(45);index:idx_ip"`
+	IPLocation   string    `json:"ip_location" gorm:"type:varchar(100)"`
+	UserAgent    string    `json:"user_agent" gorm:"type:varchar(500)"`
+	DeviceID     string    `json:"device_id" gorm:"type:varchar(100)"`
+	DeviceType   string    `json:"device_type" gorm:"type:varchar(20)"`
+	Duration     int64     `json:"duration" gorm:"type:bigint"`
+	Referer      string    `json:"referer" gorm:"type:varchar(500)"`
+	Protocol     string    `json:"protocol" gorm:"type:varchar(10)"`
+	ServerIP     string    `json:"server_ip" gorm:"type:varchar(45)"`
+	ServerPort   int       `json:"server_port" gorm:"type:int"`
+	ClientPort   int       `json:"client_port" gorm:"type:int"`
+	OccurredAt   time.Time `json:"occurred_at" gorm:"index:idx_created"`
+	Status       string    `json:"status" gorm:"type:varchar(20);index:idx_status"`
+	ErrorMsg     string    `json:"error_msg" gorm:"type:text"`
+	CreatedAt    time.Time `json:"created_at" gorm:"index:idx_created"`
+}
+
+// BeforeCreate 创建前生成TraceID
+func (ol *OperationLog) BeforeCreate(tx *gorm.DB) error {
+	if ol.TraceID == "" {
+		ol.TraceID = uuid.New().String()
+	}
+	if ol.OccurredAt.IsZero() {
+		ol.OccurredAt = time.Now()
+	}
+	return nil
+}
+
+func (OperationLog) TableName() string {
+	return "operation_logs"
+}