Add PantallaTutorialAyuda, a PageView-based carousel covering saved
stations/groups, per-station equalizer, recording, adaptive alarms,
Android Auto favorites, auto-reconnect, snooze duration, custom
stations, and a closing summary with a "watch it again" reminder.
ServicioTutorialAyuda persists a one-time seen flag so the carousel
shows once via mostrarSiProcede, independent of entry point; the
final page's CTA label depends on the primerArranque constructor
parameter ("Empezar a escuchar" vs "Cerrar").
Translate the new copy into all 13 supported locales and update
helpSubtitle to describe the new entry point.
PluriScreenHeader was a 38-radius glass hero: an aurora banner at 24%
opacity, a black-to-transparent scrim, two radial orbs, a 120px app-mark
watermark and a 56px tri-gradient glyph badge. None of it is in the
prototype (t4) -- every root's title is plain text in its own 56px
row, which PluriRootHeader (S1) already provides. Delete the class
(and its now-orphaned _Orb helper) and its four call sites (Buscar,
Favoritos x2, Alarmas, Ajustes landed with S8).
Two of those call sites carried the hero's only functional bit besides
the title, so PluriRootHeader gains an `actions` slot (rendered before
the shared bedtime button) to keep them reachable:
- Alarmas' create-alarm button (FilledButton.tonalIcon, unchanged
shape, just relocated)
- Buscar's filters entry point (the same tappable PluriStatusPill,
just relocated)
Every other retired trailing pill (Ajustes' "Secure" status,
Favoritos' collection-count badges, Alarmas' alarm-count badge) was
purely decorative and matches the prototype by simply disappearing.
S2, Tier 1 visual-fidelity pass (audit id 2521).
The prototype (t4) draws no global app bar anywhere: every root paints
a plain ~56px title row inside its own content instead (Alarmas line
325, Ajustes line 511, Explorar line 641). app.dart wrapped every tab
in PluriWaveScaffold(appBar: AppBar(title: Text(appTitle), ...)),
adding 56dp of chrome and a "PluriWave" title the prototype never
shows.
Add PluriRootHeader, a shared 56px title-row widget reused by all 5
roots. Extract app.dart's old _mostrarTimerDialog (only reachable from
the removed AppBar action) into a free function,
showPluriSleepTimerSheet, so every root's header can open the same
sheet directly and the sleep-timer feature stays reachable from every
tab with no behaviour change.
S1, Tier 1 visual-fidelity pass (audit id 2521).
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