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/login_log.go

@@ -0,0 +1,87 @@
+package model
+
+import (
+	"time"
+)
+
+// LoginEvent 登录事件
+type LoginEvent string
+
+const (
+	LoginEventLogin   LoginEvent = "login"
+	LoginEventLogout  LoginEvent = "logout"
+	LoginEventRefresh LoginEvent = "refresh"
+	LoginEventReset   LoginEvent = "reset"
+	LoginEventFail    LoginEvent = "fail"
+)
+
+// LoginResult 登录结果
+type LoginResult string
+
+const (
+	LoginResultSuccess LoginResult = "success"
+	LoginResultFail    LoginResult = "fail"
+)
+
+// FailReason 失败原因
+type FailReason string
+
+const (
+	FailReasonUserNotFound  FailReason = "user_not_found"
+	FailReasonWrongPassword FailReason = "wrong_password"
+	FailReasonAccountLocked FailReason = "account_locked"
+	FailReasonAccountBanned FailReason = "account_banned"
+	FailReasonRateLimit     FailReason = "rate_limit"
+	FailReasonInvalidToken  FailReason = "invalid_token"
+	FailReasonTokenExpired  FailReason = "token_expired"
+	FailReasonInvalidCode   FailReason = "invalid_code"
+	FailReasonCodeExpired   FailReason = "code_expired"
+	FailReasonUnknown       FailReason = "unknown"
+)
+
+// LoginType 登录类型
+type LoginType string
+
+const (
+	LoginTypePassword LoginType = "password"
+	LoginTypeSMS      LoginType = "sms"
+	LoginTypeEmail    LoginType = "email"
+	LoginTypeOAuth    LoginType = "oauth"
+)
+
+// LoginMethod 登录方式
+type LoginMethod string
+
+const (
+	LoginMethodUsername LoginMethod = "username"
+	LoginMethodMobile   LoginMethod = "mobile"
+	LoginMethodEmail    LoginMethod = "email"
+)
+
+// LoginLog 登录日志实体
+type LoginLog struct {
+	ID          uint       `json:"id" gorm:"primaryKey;autoIncrement"`
+	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)"`
+	LoginType   string     `json:"login_type" gorm:"type:varchar(20);index:idx_login_type"`
+	LoginMethod string     `json:"login_method" gorm:"type:varchar(20)"`
+	Event       string     `json:"event" gorm:"type:varchar(20);index:idx_event"`
+	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)"`
+	DeviceType  string     `json:"device_type" gorm:"type:varchar(20)"`
+	DeviceID    string     `json:"device_id" gorm:"type:varchar(100)"`
+	AppVersion  string     `json:"app_version" gorm:"type:varchar(50)"`
+	Result      string     `json:"result" gorm:"type:varchar(20);index:idx_result"`
+	FailReason  string     `json:"fail_reason" gorm:"type:varchar(200)"`
+	TokenID     string     `json:"token_id" gorm:"type:varchar(64)"`
+	ExpiredAt   *time.Time `json:"expired_at"`
+	ServerIP    string     `json:"server_ip" gorm:"type:varchar(45)"`
+	ServerPort  int        `json:"server_port" gorm:"type:int"`
+	CreatedAt   time.Time  `json:"created_at" gorm:"index:idx_created"`
+}
+
+func (LoginLog) TableName() string {
+	return "login_logs"
+}