✨ 新增几大中心功能

server/model/system/invite_code.go

@@ -0,0 +1,32 @@
+package system
+
+import (
+	"time"
+)
+
+type InviteCodeStatus string
+
+const (
+	InviteCodeStatusUnused  InviteCodeStatus = "unused"
+	InviteCodeStatusUsed    InviteCodeStatus = "used"
+	InviteCodeStatusRevoked InviteCodeStatus = "revoked"
+	InviteCodeStatusExpired InviteCodeStatus = "expired"
+)
+
+// InviteCode 邀请码（明文不落库，仅保存 hash）
+type InviteCode struct {
+	ID              uint             `json:"id" gorm:"primaryKey"`
+	CreatedByUserID uint             `json:"createdByUserId" gorm:"index;not null;comment:邀请码生成者用户ID"`
+	CodeHash        string           `json:"-" gorm:"uniqueIndex;size:64;not null;comment:邀请码hash(sha256 hex)"`
+	CodeLast4       string           `json:"codeLast4" gorm:"size:8;comment:邀请码末尾4位(展示)"`
+	Status          InviteCodeStatus `json:"status" gorm:"type:varchar(16);index;not null;comment:状态"`
+	ExpiresAt       *time.Time       `json:"expiresAt" gorm:"index;comment:过期时间"`
+	UsedByUserID    *uint            `json:"usedByUserId" gorm:"index;comment:使用者用户ID"`
+	UsedAt          *time.Time       `json:"usedAt" gorm:"comment:使用时间"`
+	CreatedAt       time.Time        `json:"createdAt"`
+	UpdatedAt       time.Time        `json:"updatedAt"`
+}
+
+func (InviteCode) TableName() string {
+	return "invite_codes"
+}