✨ 新增几大中心功能

server/model/system/sys_param_change_log.go

@@ -0,0 +1,25 @@
+package system
+
+import "time"
+
+type SysParamChangeAction string
+
+const (
+	SysParamChangeActionCreate SysParamChangeAction = "create"
+	SysParamChangeActionUpdate SysParamChangeAction = "update"
+	SysParamChangeActionDelete SysParamChangeAction = "delete"
+)
+
+// SysParamChangeLog 参数变更审计（策略/开关等都落在 sys_params）
+type SysParamChangeLog struct {
+	ID             uint                 `json:"id" gorm:"primaryKey"`
+	ParamID        uint                 `json:"paramId" gorm:"index;not null"`
+	Key            string               `json:"key" gorm:"index;size:191;not null"`
+	Action         SysParamChangeAction `json:"action" gorm:"type:varchar(16);index;not null"`
+	OldValue       string               `json:"oldValue" gorm:"type:text"`
+	NewValue       string               `json:"newValue" gorm:"type:text"`
+	OperatorUserID uint                 `json:"operatorUserId" gorm:"index;not null"`
+	CreatedAt      time.Time            `json:"createdAt" gorm:"index"`
+}
+
+func (SysParamChangeLog) TableName() string { return "sys_param_change_logs" }