EstadoAlarmas, EstadoGrabacion and EstadoRadio defaulted `esPremium` to
`() => true`, so any construction site that forgot to wire entitlement
compiled fine and silently ran ungated — failing OPEN to premium and
disabling the paywall with no test able to catch it.
The parameter is now required with no default. Production wiring in
app.dart was already correct and is unchanged; the 184 pre-existing test
call sites now pass `() => true` explicitly, which is exactly the old
implicit default, so every assertion is untouched.
EstadoRadio has no gate of its own but constructs EstadoGrabacion, so it
inherits the same contract.
The one test that existed to pin the old default is renamed to describe
what it still covers (the premium path through iniciar() with no
duracion); its assertions are unchanged.
showPluriSleepTimerSheet already had a working countdown branch
(ServicioTimer.tiempoRestanteStream), but every preset and the custom
duration flow popped the sheet immediately after starting the timer --
so the countdown never rendered in the primary flow, only if the user
happened to reopen the sheet afterwards.
Stop popping the sheet on start; the existing Consumer<EstadoRadio>
already reacts to iniciarTimerDuracion's notifyListeners and swaps to
the countdown view live. Also make the sheet scroll-controlled: at a
realistic phone width the countdown's title + description + headline-
sized remaining-time text overflowed the default half-screen cap that
never mattered while the sheet always closed before that view could
render.
FreeTLab