重构数据引擎和报表引擎

consts/api-feature/application_status.go

@@ -1,13 +1,10 @@
 package api_feature
 
-// AppStatus 应用状态
-type AppStatus string
+// ApplicationStatus 应用状态（暂未使用，保留供未来扩展）
+type ApplicationStatus string
 
 const (
-	AppStatusActive   AppStatus = "active"   // 启用
-	AppStatusInactive AppStatus = "inactive" // 停用
+	ApplicationStatusPending  ApplicationStatus = "pending"
+	ApplicationStatusApproved ApplicationStatus = "approved"
+	ApplicationStatusRejected ApplicationStatus = "rejected"
 )
-
-func (s AppStatus) String() string {
-	return string(s)
-}