chore: align forest AI development setup

backend/internal/seed/demo.go

@@ -110,7 +110,8 @@ func seedProjects(tx *gorm.DB, ownerID uint) ([]models.SenlinAgentProject, error
 
 func firstOrCreateProject(tx *gorm.DB, ownerID uint, name string, identifier string, description string) (models.SenlinAgentProject, error) {
 	var project models.SenlinAgentProject
-	err := tx.Where("owner_id = ? AND name = ?", ownerID, name).First(&project).Error
+	// identifier 是用户范围内的稳定唯一键；展示名称被本地修改后，重复 seed 仍复用原项目。
+	err := tx.Where("owner_id = ? AND identifier = ?", ownerID, identifier).First(&project).Error
 	if err == nil {
 		return project, nil
 	}