第 5 阶段：纠纷、通知与后台-1

backend/internal/model/notification.go

@@ -0,0 +1,19 @@
+package model
+
+import "time"
+
+type Notification struct {
+	ID        uint64     `gorm:"primaryKey" json:"id"`
+	UserID    uint64     `gorm:"not null;index" json:"user_id"`
+	Type      string     `gorm:"size:32;not null" json:"type"`
+	Title     string     `gorm:"size:128;not null" json:"title"`
+	Content   string     `json:"content"`
+	BizType   string     `gorm:"size:32;not null;default:''" json:"biz_type"`
+	BizID     *uint64    `json:"biz_id"`
+	ReadAt    *time.Time `json:"read_at"`
+	CreatedAt time.Time  `json:"created_at"`
+}
+
+func (Notification) TableName() string {
+	return "notifications"
+}