@startuml API 搜索应用
actor User
participant "AppCenter Router" as Router
participant "AppCenter Manager" as Manager
database MongoDB

User -> Router: GET /api/app with filters
Router -> Manager: fetch_all_apps()
Manager -> Manager: build search filters
Manager -> MongoDB: find with filters
MongoDB --> Manager: return apps
Manager -> Manager: build response items
Manager --> Router: return app list
Router --> User: return apps response
@enduml