修复项目无法删除问题

server/cmd/seed/main.go

@@ -172,6 +172,8 @@ func resetProject(tx *gorm.DB, spec projectSeed, now time.Time) (model.Project,
 		project.ID, project.CreatedAt = uuid.NewString(), now
 	} else if err != nil {
 		return project, err
+	} else if project.ArchivedAt != nil {
+		return project, fmt.Errorf("refusing to reset archived project %q", spec.Code)
 	}
 	// Only demo projects are reset; unrelated project data is never touched.
 	for _, statement := range []string{