merge: equalizer cross-surface sync + test ads for the closed-testing phase [version set]

Brings in two independent fixes that both need to reach testers:
- e9f47d4 resyncs EstadoEcualizador with car/notification-initiated changes
  and closes the persistence gap that lost them on restart.
- 2e15d05 forces Google test ad units in release builds while
  usarAnunciosDePruebaEnRelease is true, so no tester can generate invalid
  traffic against the AdMob account during closed testing.

[version set] keeps the 1.3.0 name; CI advances the build number.

lib/estado/estado_ecualizador.dart

@@ -37,7 +37,9 @@ class EstadoEcualizador extends ChangeNotifier {
        _presetsPersonalizadosService =
            presetsPersonalizadosService ?? ServicioPresetsPersonalizados(),
        _dispositivoAudio = dispositivoAudio,
-       _emisoraActualUuid = emisoraActualUuid ?? (() => null);
+       _emisoraActualUuid = emisoraActualUuid ?? (() => null) {
+    _escucharCambiosEqDesdeHandler();
+  }
 
   final ServicioAudio audio;
   final ServicioEcualizador servicio;
@@ -84,6 +86,20 @@ class EstadoEcualizador extends ChangeNotifier {
   StreamSubscription<DispositivoAudio>? _deviceSub;
   Future<void>? _refrescoEnCurso;
 
+  /// Catches a car/notification-initiated EQ change that bypasses this
+  /// class entirely (eq-sync-superficies): `accionEqToggle` calls
+  /// `PluriWaveAudioHandler.setEcualizadorActivo` directly, and
+  /// `seleccionarPresetEqPorMediaId` calls `aplicarPreset` directly — both
+  /// mutate ONLY the handler's own `_ecualizadorActivo`/`_presetActual`
+  /// fields, never [audio]'s owner ([EstadoEcualizador]). Mirrors the exact
+  /// shape `EstadoRadio._escucharErroresReproduccion` already uses for the
+  /// equivalent `playFromMediaId` gap: on every [ServicioAudio.estadoStream]
+  /// tick (which the handler already re-emits on any EQ change via
+  /// `_actualizarControlesEq()`, regardless of who triggered it), compare
+  /// the handler's current EQ state against our cached copy and adopt it on
+  /// divergence.
+  StreamSubscription<EstadoReproduccion>? _suscripcionEstadoAudioEq;
+
   PresetEcualizador get presetActual => _presetActual;
   PresetEcualizador get presetPrincipal => _presetPrincipal;
   bool get activo => _activo;
@@ -337,6 +353,58 @@ class EstadoEcualizador extends ChangeNotifier {
     notifyListeners();
   }
 
+  /// Subscribes to [ServicioAudio.estadoStream] to catch a
+  /// car/notification-initiated EQ change (see [_suscripcionEstadoAudioEq]
+  /// doc for the full rationale).
+  void _escucharCambiosEqDesdeHandler() {
+    _suscripcionEstadoAudioEq = audio.estadoStream.listen((_) {
+      unawaited(_resincronizarConHandler());
+    });
+  }
+
+  /// Compares the handler's live EQ state ([ServicioAudio.ecualizadorActivo],
+  /// [ServicioAudio.presetActual]) against our cached [_activo]/
+  /// [_presetActual] and adopts the handler's value on divergence.
+  ///
+  /// Deliberately never calls back into [audio] here (no
+  /// `setEcualizadorActivo`/`aplicarPreset`): doing so would re-trigger the
+  /// handler's own `_actualizarControlesEq()` re-push, which would tick
+  /// [ServicioAudio.estadoStream] again and re-enter this method forever.
+  /// Only a local field write, [servicio] persistence and [notifyListeners]
+  /// happen here, so a divergence is resolved in a single pass.
+  ///
+  /// Wrapped in try/catch like every other handler-facing read in this
+  /// class (e.g. [_sembrarDispositivoActual]): a test double or an
+  /// unexpected platform state that makes [audio]'s EQ getters unavailable
+  /// must never crash the stream subscription — it just skips this tick.
+  Future<void> _resincronizarConHandler() async {
+    try {
+      final activoHandler = audio.ecualizadorActivo;
+      final presetHandler = audio.presetActual;
+
+      final activoDiverge = activoHandler != _activo;
+      final presetDiverge = presetHandler != _presetActual;
+      if (!activoDiverge && !presetDiverge) return;
+
+      if (activoDiverge) {
+        _activo = activoHandler;
+        // Closes the persistence gap: `PluriWaveAudioHandler` never
+        // persists anything itself (it must stay headless-constructible,
+        // with zero SharedPreferences/Provider access) — [servicio] is the
+        // only owner of EQ persistence, so a car/notification toggle must
+        // be saved HERE or it is lost on the next process restart.
+        await servicio.guardarActivo(activoHandler);
+      }
+      if (presetDiverge) {
+        _presetActual = presetHandler;
+      }
+
+      notifyListeners();
+    } catch (_) {
+      // See doc above — never let a resync failure crash the app.
+    }
+  }
+
   /// Applies [preset] to the audio engine and tracks it as current
   /// WITHOUT persisting it (used when switching stations).
   Future<void> aplicarPresetActivo(PresetEcualizador preset) async {
@@ -673,6 +741,7 @@ class EstadoEcualizador extends ChangeNotifier {
   @override
   void dispose() {
     _deviceSub?.cancel();
+    _suscripcionEstadoAudioEq?.cancel();
     super.dispose();
   }
 }

lib/servicios/servicio_anuncios.dart

@@ -15,13 +15,28 @@ const _bannerAdUnitIdReal = 'ca-app-pub-6038935671414339/5658618378';
 /// Real interstitial unit id, provisioned in the AdMob console (iap-freemium-unlock).
 const _interstitialAdUnitIdReal = 'ca-app-pub-6038935671414339/4189478248';
 
-/// Real id in release builds only; test id everywhere else (debug/profile,
+/// TESTING-PHASE SWITCH. While `true`, release builds serve Google's official
-/// including internal-testing-track builds run via `flutter run --release`
+/// TEST ad units instead of the real ones, so none of the closed-testing
-/// on a personal device — see the "never tap your own ads" note above).
+/// human testers can generate invalid traffic against the AdMob account
+/// (they cannot be registered as AdMob test devices). Flip to `false` for
+/// the production release — that is the ONLY change needed to start serving
+/// real ads. This does NOT affect the AdMob application id in
+/// `AndroidManifest.xml`, which stays real in every build (it only
+/// initializes the SDK and carries none of the click risk).
+const usarAnunciosDePruebaEnRelease = true;
+
+/// Real id in release builds only, and only once [usarAnunciosDePruebaEnRelease]
+/// is flipped to `false`; test id everywhere else (debug/profile, including
+/// internal-testing-track builds run via `flutter run --release` on a
+/// personal device — see the "never tap your own ads" note above).
 const bannerAdUnitId =
-    kReleaseMode ? _bannerAdUnitIdReal : bannerAdUnitIdPrueba;
+    kReleaseMode && !usarAnunciosDePruebaEnRelease
+        ? _bannerAdUnitIdReal
+        : bannerAdUnitIdPrueba;
 const interstitialAdUnitId =
-    kReleaseMode ? _interstitialAdUnitIdReal : interstitialAdUnitIdPrueba;
+    kReleaseMode && !usarAnunciosDePruebaEnRelease
+        ? _interstitialAdUnitIdReal
+        : interstitialAdUnitIdPrueba;
 
 /// Ads port + AdMob adapter (Design "Interfaces / Contracts", ADR-6): owns
 /// the entitlement gate for both surfaces, the interstitial's session

lib/servicios/servicio_audio.dart

@@ -582,6 +582,13 @@ class ServicioAudio {
   bool get ecualizadorDisponible => _handler.ecualizadorDisponible;
   PresetEcualizador get presetActual => _handler.presetActual;
 
+  /// Forwards the handler's own on/off flag (eq-sync-superficies): a
+  /// car/notification toggle (`accionEqToggle`) mutates
+  /// `PluriWaveAudioHandler._ecualizadorActivo` directly, bypassing
+  /// [setEcualizadorActivo] entirely. [EstadoEcualizador] polls this getter
+  /// on every [estadoStream] tick to detect and resync that divergence.
+  bool get ecualizadorActivo => _handler.ecualizadorActivo;
+
   Future<void> aplicarPreset(PresetEcualizador preset) =>
       _handler.aplicarPreset(preset);
   Future<void> setEcualizadorActivo(bool activo) =>

test/estado/estado_ecualizador_test.dart

@@ -1728,6 +1728,132 @@ void main() {
       eq.dispose();
     });
   });
+
+  // ---------------------------------------------------------------------------
+  // eq-sync-superficies: car/notification-initiated EQ changes must reach
+  // EstadoEcualizador (and persist through ServicioEcualizador), not just
+  // the audio handler.
+  // ---------------------------------------------------------------------------
+
+  group('EstadoEcualizador — resync with handler-initiated EQ changes '
+      '(eq-sync-superficies)', () {
+    test(
+      'a handler-initiated toggle (car/notification) syncs activo and '
+      'notifies listeners',
+      () async {
+        final fakeAudio = FakeServicioAudio();
+        final eq = EstadoEcualizador(
+          audio: fakeAudio,
+          servicio: FakeServicioEcualizador(activo: true),
+        );
+        await eq.cargarPersistido();
+        expect(eq.activo, isTrue);
+
+        var avisos = 0;
+        eq.addListener(() => avisos++);
+
+        // Simulates `accionEqToggle` calling
+        // `PluriWaveAudioHandler.setEcualizadorActivo` directly, bypassing
+        // `ServicioAudio`/`EstadoEcualizador` entirely.
+        fakeAudio.simularCambioEqDesdeHandler(activo: false);
+        await Future<void>.delayed(const Duration(milliseconds: 50));
+
+        expect(eq.activo, isFalse);
+        expect(avisos, greaterThanOrEqualTo(1));
+        eq.dispose();
+      },
+    );
+
+    test(
+      'a handler-initiated preset change (Android Auto) syncs presetActual '
+      'and notifies listeners',
+      () async {
+        final fakeAudio = FakeServicioAudio();
+        final eq = EstadoEcualizador(
+          audio: fakeAudio,
+          servicio: FakeServicioEcualizador(principal: PresetEcualizador.flat),
+        );
+        await eq.cargarPersistido();
+        expect(eq.presetActual, equals(PresetEcualizador.flat));
+
+        var avisos = 0;
+        eq.addListener(() => avisos++);
+
+        // Simulates `seleccionarPresetEqPorMediaId` calling
+        // `PluriWaveAudioHandler.aplicarPreset` directly.
+        fakeAudio.simularCambioEqDesdeHandler(preset: PresetEcualizador.jazz);
+        await Future<void>.delayed(const Duration(milliseconds: 50));
+
+        expect(eq.presetActual, equals(PresetEcualizador.jazz));
+        expect(avisos, greaterThanOrEqualTo(1));
+        eq.dispose();
+      },
+    );
+
+    test(
+      'a handler-initiated toggle is persisted through ServicioEcualizador '
+      '(survives a restart)',
+      () async {
+        final fakeAudio = FakeServicioAudio();
+        final fakeServicio = FakeServicioEcualizador(activo: true);
+        final eq = EstadoEcualizador(audio: fakeAudio, servicio: fakeServicio);
+        await eq.cargarPersistido();
+
+        fakeAudio.simularCambioEqDesdeHandler(activo: false);
+        await Future<void>.delayed(const Duration(milliseconds: 50));
+
+        expect(fakeServicio.config.activo, isFalse);
+        expect(fakeServicio.guardarActivoLlamadas, equals(1));
+        eq.dispose();
+      },
+    );
+
+    test(
+      'resync does not cause an extra handler write (no feedback loop)',
+      () async {
+        final fakeAudio = FakeServicioAudio();
+        final eq = EstadoEcualizador(
+          audio: fakeAudio,
+          servicio: FakeServicioEcualizador(activo: true),
+        );
+        await eq.cargarPersistido();
+        fakeAudio.cambiosEcualizadorActivo.clear();
+        fakeAudio.presetsAplicados.clear();
+
+        fakeAudio.simularCambioEqDesdeHandler(activo: false);
+        await Future<void>.delayed(const Duration(milliseconds: 50));
+
+        // The resync must only read from `audio` and write to `servicio` —
+        // never write BACK into `audio`, or a handler write would trigger
+        // another stream tick, which would resync again, forever.
+        expect(fakeAudio.cambiosEcualizadorActivo, isEmpty);
+        expect(fakeAudio.presetsAplicados, isEmpty);
+        eq.dispose();
+      },
+    );
+
+    test(
+      'a UI-initiated toggle still works exactly as before and persists '
+      'exactly once (regression)',
+      () async {
+        final fakeAudio = FakeServicioAudio();
+        final fakeServicio = FakeServicioEcualizador(activo: true);
+        final eq = EstadoEcualizador(audio: fakeAudio, servicio: fakeServicio);
+        await eq.cargarPersistido();
+        fakeAudio.cambiosEcualizadorActivo.clear();
+
+        await eq.cambiarActivo(false);
+        // Give any (harmless, no-op) resync tick a chance to run too.
+        await Future<void>.delayed(const Duration(milliseconds: 50));
+
+        expect(eq.activo, isFalse);
+        expect(fakeServicio.config.activo, isFalse);
+        expect(fakeServicio.guardarActivoLlamadas, equals(1));
+        expect(fakeAudio.cambiosEcualizadorActivo, equals([false]));
+        eq.dispose();
+      },
+    );
+  });
 }
 
 /// Fake whose [guardarActivo] stays pending until released, and releases the

test/estado/estado_radio_test.dart

@@ -77,7 +77,7 @@ void main() {
         final porEmisora = {'fav-1': PresetEcualizador.rock};
         final estado = EstadoRadio(
           esPremium: () => true,
-          audio: FakeServicioAudio(ecualizadorActivo: false),
+          audio: FakeServicioAudio(ecualizadorDisponible: false),
           favoritos: FakeServicioFavoritos(),
           radio: FakeServicioRadio(),
           servicioEcualizador: FakeServicioEcualizador(

test/helpers/fakes.dart

@@ -15,11 +15,14 @@ import 'package:pluriwave/servicios/servicio_presets_personalizados.dart';
 import 'package:pluriwave/servicios/servicio_radio.dart';
 
 class FakeServicioAudio extends ServicioAudio {
-  FakeServicioAudio({this.ecualizadorActivo = true}) {
+  FakeServicioAudio({this.ecualizadorDisponible = true}) {
     _estadoController.add(EstadoReproduccion.detenido);
   }
 
-  final bool ecualizadorActivo;
+  /// Whether the native equalizer is available on this device — NOT whether
+  /// it is currently switched on (see [ecualizadorActivo] for that).
+  @override
+  final bool ecualizadorDisponible;
   final _estadoController = StreamController<EstadoReproduccion>.broadcast();
   final List<PresetEcualizador> presetsAplicados = [];
   final List<Emisora> emisorasReproducidas = [];
@@ -30,6 +33,35 @@ class FakeServicioAudio extends ServicioAudio {
   Emisora? _emisoraActual;
   EstadoReproduccion _estadoActual = EstadoReproduccion.detenido;
 
+  /// Mirrors `PluriWaveAudioHandler._ecualizadorActivo`/`_presetActual`:
+  /// the handler-side EQ state, settable independently of the
+  /// `ServicioAudio`-forwarded methods below so tests can simulate a
+  /// car/notification-initiated change (eq-sync-superficies).
+  bool _ecualizadorActivoValor = true;
+  PresetEcualizador _presetActualValor = PresetEcualizador.flat;
+
+  @override
+  bool get ecualizadorActivo => _ecualizadorActivoValor;
+
+  @override
+  PresetEcualizador get presetActual => _presetActualValor;
+
+  /// Simulates a car/notification-initiated EQ change: mutates the (fake)
+  /// handler's own state directly, the same way
+  /// `PluriWaveAudioHandler.customAction`/`seleccionarPresetEqPorMediaId`
+  /// call `setEcualizadorActivo`/`aplicarPreset` on the handler WITHOUT
+  /// going through `ServicioAudio` — then re-emits the current playback
+  /// state, mirroring `_actualizarControlesEq()`'s unconditional
+  /// `playbackState.add(...)` republish so a resync listener on
+  /// [estadoStream] picks it up. Deliberately does NOT append to
+  /// [cambiosEcualizadorActivo]/[presetsAplicados]: those track calls that
+  /// arrived through the `ServicioAudio`-forwarded (UI-initiated) path.
+  void simularCambioEqDesdeHandler({bool? activo, PresetEcualizador? preset}) {
+    if (activo != null) _ecualizadorActivoValor = activo;
+    if (preset != null) _presetActualValor = preset;
+    emitirEstado(_estadoActual);
+  }
+
   @override
   void configurarLocalizaciones(AppLocalizations l10n) {
     // No global handler in tests; just record the call.
@@ -39,9 +71,6 @@ class FakeServicioAudio extends ServicioAudio {
   @override
   Emisora? get emisoraActual => _emisoraActual;
 
-  @override
-  bool get ecualizadorDisponible => ecualizadorActivo;
-
   @override
   Stream<EstadoReproduccion> get estadoStream => _estadoController.stream;
 
@@ -105,6 +134,7 @@ class FakeServicioAudio extends ServicioAudio {
   @override
   Future<void> aplicarPreset(PresetEcualizador preset) async {
     presetsAplicados.add(preset);
+    _presetActualValor = preset;
   }
 
   @override
@@ -113,6 +143,7 @@ class FakeServicioAudio extends ServicioAudio {
   @override
   Future<void> setEcualizadorActivo(bool activo) async {
     cambiosEcualizadorActivo.add(activo);
+    _ecualizadorActivoValor = activo;
   }
 
   @override
@@ -349,6 +380,10 @@ class FakeServicioEcualizador extends ServicioEcualizador {
   ConfiguracionEcualizador _config;
   ConfiguracionEcualizador get config => _config;
 
+  /// Number of times [guardarActivo] has been called — lets tests assert a
+  /// persistence write happened exactly once (eq-sync-superficies).
+  int guardarActivoLlamadas = 0;
+
   @override
   Future<ConfiguracionEcualizador> cargar() async => _config;
 
@@ -367,6 +402,7 @@ class FakeServicioEcualizador extends ServicioEcualizador {
 
   @override
   Future<void> guardarActivo(bool activo) async {
+    guardarActivoLlamadas++;
     _config = ConfiguracionEcualizador(
       principal: _config.principal,
       porEmisora: _config.porEmisora,

test/servicios/servicio_anuncios_test.dart

@@ -161,6 +161,36 @@ void main() {
     });
   });
 
+  group('usarAnunciosDePruebaEnRelease — interruptor de fase de pruebas', () {
+    test('mientras esta en true, bannerAdUnitId e interstitialAdUnitId son los '
+        'ids oficiales de prueba de Google', () {
+      expect(usarAnunciosDePruebaEnRelease, isTrue);
+      expect(bannerAdUnitId, equals('ca-app-pub-3940256099942544/6300978111'));
+      expect(
+        interstitialAdUnitId,
+        equals('ca-app-pub-3940256099942544/1033173712'),
+      );
+    });
+
+    test('los ids reales siguen presentes como constantes en el archivo (no se '
+        'pueden perder en un futuro edit)', () {
+      final source =
+          File('lib/servicios/servicio_anuncios.dart').readAsStringSync();
+      expect(
+        source.contains("'ca-app-pub-6038935671414339/5658618378'"),
+        isTrue,
+        reason: 'el id real del banner debe seguir presente en el archivo',
+      );
+      expect(
+        source.contains("'ca-app-pub-6038935671414339/4189478248'"),
+        isTrue,
+        reason:
+            'el id real del interstitial debe seguir presente en el '
+            'archivo',
+      );
+    });
+  });
+
   group('debeMostrarBanner', () {
     test('free: true', () {
       final servicio = construir(