第 5 阶段：纠纷、通知与后台-1

backend/internal/model/system_config.go

@@ -0,0 +1,17 @@
+package model
+
+import "time"
+
+type SystemConfig struct {
+	ID          uint64    `gorm:"primaryKey" json:"id"`
+	Key         string    `gorm:"column:key;size:128;not null;uniqueIndex" json:"key"`
+	Value       string    `gorm:"column:value;type:text;not null" json:"value"`
+	Description string    `gorm:"size:255;not null;default:''" json:"description"`
+	UpdatedBy   *uint64   `json:"updated_by"`
+	CreatedAt   time.Time `json:"created_at"`
+	UpdatedAt   time.Time `json:"updated_at"`
+}
+
+func (SystemConfig) TableName() string {
+	return "system_configs"
+}