@startuml
skinparam backgroundColor #FFFFFF
skinparam defaultFontName Arial
skinparam defaultFontSize 14
skinparam shadowing false
title Native input — one VM and one event dispatcher
actor User
participant TesseraApp as GUI
participant "events::Client" as Client
participant "API / worker" as Worker
participant ReplSession as VM
participant event_dispatch as Dispatch
participant "refresh / publication" as Refresh
User -> GUI : pointer press / release
GUI -> GUI : published geometry; matching target
GUI -> Client : Input(window, session, layout_version, mount)
Client -> Worker : POST /events
Worker -> Worker : reject stale source/destination identities
Worker -> VM : dispatch_incremental
VM -> Dispatch : target Block + optional Mount
Dispatch -> Dispatch : capture -> target -> bubble
Dispatch -> VM : budgeted handler / onEvent / onClick
VM -> Refresh : update related presentations
Refresh --> GUI : Frame / DocumentUpdated
note over Dispatch
Without a Mount, dispatch visits only the target.
With a Mount, traversal follows that occurrence.
end note
@enduml