feat(bienvenida): add monetization-free welcome screen

Build the first-run welcome surface from mockup screen 14, stripped of
its entire monetization block: no PRO pill, no "14 dias PRO gratis"
trial line, no pricing card, no secondary "free version" link. Ships
only logo, headline, body copy, exactly 3 feature bullets, and the
single "Empezar a escuchar" CTA, as a full-screen route (not a modal).

Spanish copy is re-cast from the mockup's "tu" form to the app's
established voseo register (matching ~750 existing app_es.arb lines),
using "auto" instead of "coche" per the one existing precedent. The 3
bullet icons reuse existing tokens (electricMagenta/liveGreen/
warmCoral) that already match the mockup's own hex values for them.

CTA switches to the Escuchar tab and pops the route. Wiring this
screen into the real first-launch flow (main.dart/app.dart) is left
for a follow-up unit, same shape as WU15/WU15b - this WU only covers
the isolated, tested screen per its own task list and verify command.

WU17.

lib/l10n/app_en.arb

@@ -799,5 +799,14 @@
       "error": {}
     }
   },
-  "localMusicFolderGenericName": "Selected folder"
+  "localMusicFolderGenericName": "Selected folder",
+  "welcomeHeadline": "Your world, live",
+  "welcomeBody": "53,412 stations from 238 countries. Save your favorites, take them to the car, and wake up to them.",
+  "welcomeBullet1Title": "Per-station equalizer",
+  "welcomeBullet1Subtitle": "Plus a preset per output device",
+  "welcomeBullet2Title": "Android Auto",
+  "welcomeBullet2Subtitle": "Your favorites and local music in the car",
+  "welcomeBullet3Title": "Music alarms",
+  "welcomeBullet3Subtitle": "With gradual volume rise and vacation mode",
+  "welcomeCtaLabel": "Start listening"
 }

lib/l10n/app_es.arb

@@ -758,5 +758,14 @@
       "error": {}
     }
   },
-  "localMusicFolderGenericName": "Carpeta seleccionada"
+  "localMusicFolderGenericName": "Carpeta seleccionada",
+  "welcomeHeadline": "Tu mundo, en directo",
+  "welcomeBody": "53.412 emisoras de 238 países. Guardá tus favoritas, llevalas al auto y despertate con ellas.",
+  "welcomeBullet1Title": "Ecualizador por emisora",
+  "welcomeBullet1Subtitle": "Y un preset por dispositivo de salida",
+  "welcomeBullet2Title": "Android Auto",
+  "welcomeBullet2Subtitle": "Tus favoritas y tu música local en el auto",
+  "welcomeBullet3Title": "Alarmas musicales",
+  "welcomeBullet3Subtitle": "Con subida progresiva y modo vacaciones",
+  "welcomeCtaLabel": "Empezar a escuchar"
 }

lib/l10n/gen/app_localizations.dart

@@ -2869,6 +2869,60 @@ abstract class AppLocalizations {
   /// In es, this message translates to:
   /// **'Carpeta seleccionada'**
   String get localMusicFolderGenericName;
+
+  /// No description provided for @welcomeHeadline.
+  ///
+  /// In es, this message translates to:
+  /// **'Tu mundo, en directo'**
+  String get welcomeHeadline;
+
+  /// No description provided for @welcomeBody.
+  ///
+  /// In es, this message translates to:
+  /// **'53.412 emisoras de 238 países. Guardá tus favoritas, llevalas al auto y despertate con ellas.'**
+  String get welcomeBody;
+
+  /// No description provided for @welcomeBullet1Title.
+  ///
+  /// In es, this message translates to:
+  /// **'Ecualizador por emisora'**
+  String get welcomeBullet1Title;
+
+  /// No description provided for @welcomeBullet1Subtitle.
+  ///
+  /// In es, this message translates to:
+  /// **'Y un preset por dispositivo de salida'**
+  String get welcomeBullet1Subtitle;
+
+  /// No description provided for @welcomeBullet2Title.
+  ///
+  /// In es, this message translates to:
+  /// **'Android Auto'**
+  String get welcomeBullet2Title;
+
+  /// No description provided for @welcomeBullet2Subtitle.
+  ///
+  /// In es, this message translates to:
+  /// **'Tus favoritas y tu música local en el auto'**
+  String get welcomeBullet2Subtitle;
+
+  /// No description provided for @welcomeBullet3Title.
+  ///
+  /// In es, this message translates to:
+  /// **'Alarmas musicales'**
+  String get welcomeBullet3Title;
+
+  /// No description provided for @welcomeBullet3Subtitle.
+  ///
+  /// In es, this message translates to:
+  /// **'Con subida progresiva y modo vacaciones'**
+  String get welcomeBullet3Subtitle;
+
+  /// No description provided for @welcomeCtaLabel.
+  ///
+  /// In es, this message translates to:
+  /// **'Empezar a escuchar'**
+  String get welcomeCtaLabel;
 }
 
 class _AppLocalizationsDelegate

lib/l10n/gen/app_localizations_ar.dart

@@ -1580,4 +1580,34 @@ class AppLocalizationsAr extends AppLocalizations {
 
   @override
   String get localMusicFolderGenericName => 'مجلد محدد';
+
+  @override
+  String get welcomeHeadline => 'Tu mundo, en directo';
+
+  @override
+  String get welcomeBody =>
+      '53.412 emisoras de 238 países. Guardá tus favoritas, llevalas al auto y despertate con ellas.';
+
+  @override
+  String get welcomeBullet1Title => 'Ecualizador por emisora';
+
+  @override
+  String get welcomeBullet1Subtitle => 'Y un preset por dispositivo de salida';
+
+  @override
+  String get welcomeBullet2Title => 'Android Auto';
+
+  @override
+  String get welcomeBullet2Subtitle =>
+      'Tus favoritas y tu música local en el auto';
+
+  @override
+  String get welcomeBullet3Title => 'Alarmas musicales';
+
+  @override
+  String get welcomeBullet3Subtitle =>
+      'Con subida progresiva y modo vacaciones';
+
+  @override
+  String get welcomeCtaLabel => 'Empezar a escuchar';
 }

lib/l10n/gen/app_localizations_bn.dart

@@ -1588,4 +1588,34 @@ class AppLocalizationsBn extends AppLocalizations {
 
   @override
   String get localMusicFolderGenericName => 'নির্বাচিত ফোল্ডার';
+
+  @override
+  String get welcomeHeadline => 'Tu mundo, en directo';
+
+  @override
+  String get welcomeBody =>
+      '53.412 emisoras de 238 países. Guardá tus favoritas, llevalas al auto y despertate con ellas.';
+
+  @override
+  String get welcomeBullet1Title => 'Ecualizador por emisora';
+
+  @override
+  String get welcomeBullet1Subtitle => 'Y un preset por dispositivo de salida';
+
+  @override
+  String get welcomeBullet2Title => 'Android Auto';
+
+  @override
+  String get welcomeBullet2Subtitle =>
+      'Tus favoritas y tu música local en el auto';
+
+  @override
+  String get welcomeBullet3Title => 'Alarmas musicales';
+
+  @override
+  String get welcomeBullet3Subtitle =>
+      'Con subida progresiva y modo vacaciones';
+
+  @override
+  String get welcomeCtaLabel => 'Empezar a escuchar';
 }

lib/l10n/gen/app_localizations_de.dart

@@ -1599,4 +1599,34 @@ class AppLocalizationsDe extends AppLocalizations {
 
   @override
   String get localMusicFolderGenericName => 'Ausgewählter Ordner';
+
+  @override
+  String get welcomeHeadline => 'Tu mundo, en directo';
+
+  @override
+  String get welcomeBody =>
+      '53.412 emisoras de 238 países. Guardá tus favoritas, llevalas al auto y despertate con ellas.';
+
+  @override
+  String get welcomeBullet1Title => 'Ecualizador por emisora';
+
+  @override
+  String get welcomeBullet1Subtitle => 'Y un preset por dispositivo de salida';
+
+  @override
+  String get welcomeBullet2Title => 'Android Auto';
+
+  @override
+  String get welcomeBullet2Subtitle =>
+      'Tus favoritas y tu música local en el auto';
+
+  @override
+  String get welcomeBullet3Title => 'Alarmas musicales';
+
+  @override
+  String get welcomeBullet3Subtitle =>
+      'Con subida progresiva y modo vacaciones';
+
+  @override
+  String get welcomeCtaLabel => 'Empezar a escuchar';
 }

lib/l10n/gen/app_localizations_en.dart

@@ -1581,4 +1581,34 @@ class AppLocalizationsEn extends AppLocalizations {
 
   @override
   String get localMusicFolderGenericName => 'Selected folder';
+
+  @override
+  String get welcomeHeadline => 'Your world, live';
+
+  @override
+  String get welcomeBody =>
+      '53,412 stations from 238 countries. Save your favorites, take them to the car, and wake up to them.';
+
+  @override
+  String get welcomeBullet1Title => 'Per-station equalizer';
+
+  @override
+  String get welcomeBullet1Subtitle => 'Plus a preset per output device';
+
+  @override
+  String get welcomeBullet2Title => 'Android Auto';
+
+  @override
+  String get welcomeBullet2Subtitle =>
+      'Your favorites and local music in the car';
+
+  @override
+  String get welcomeBullet3Title => 'Music alarms';
+
+  @override
+  String get welcomeBullet3Subtitle =>
+      'With gradual volume rise and vacation mode';
+
+  @override
+  String get welcomeCtaLabel => 'Start listening';
 }

lib/l10n/gen/app_localizations_es.dart

@@ -1594,4 +1594,34 @@ class AppLocalizationsEs extends AppLocalizations {
 
   @override
   String get localMusicFolderGenericName => 'Carpeta seleccionada';
+
+  @override
+  String get welcomeHeadline => 'Tu mundo, en directo';
+
+  @override
+  String get welcomeBody =>
+      '53.412 emisoras de 238 países. Guardá tus favoritas, llevalas al auto y despertate con ellas.';
+
+  @override
+  String get welcomeBullet1Title => 'Ecualizador por emisora';
+
+  @override
+  String get welcomeBullet1Subtitle => 'Y un preset por dispositivo de salida';
+
+  @override
+  String get welcomeBullet2Title => 'Android Auto';
+
+  @override
+  String get welcomeBullet2Subtitle =>
+      'Tus favoritas y tu música local en el auto';
+
+  @override
+  String get welcomeBullet3Title => 'Alarmas musicales';
+
+  @override
+  String get welcomeBullet3Subtitle =>
+      'Con subida progresiva y modo vacaciones';
+
+  @override
+  String get welcomeCtaLabel => 'Empezar a escuchar';
 }

lib/l10n/gen/app_localizations_fr.dart

@@ -1603,4 +1603,34 @@ class AppLocalizationsFr extends AppLocalizations {
 
   @override
   String get localMusicFolderGenericName => 'Dossier sélectionné';
+
+  @override
+  String get welcomeHeadline => 'Tu mundo, en directo';
+
+  @override
+  String get welcomeBody =>
+      '53.412 emisoras de 238 países. Guardá tus favoritas, llevalas al auto y despertate con ellas.';
+
+  @override
+  String get welcomeBullet1Title => 'Ecualizador por emisora';
+
+  @override
+  String get welcomeBullet1Subtitle => 'Y un preset por dispositivo de salida';
+
+  @override
+  String get welcomeBullet2Title => 'Android Auto';
+
+  @override
+  String get welcomeBullet2Subtitle =>
+      'Tus favoritas y tu música local en el auto';
+
+  @override
+  String get welcomeBullet3Title => 'Alarmas musicales';
+
+  @override
+  String get welcomeBullet3Subtitle =>
+      'Con subida progresiva y modo vacaciones';
+
+  @override
+  String get welcomeCtaLabel => 'Empezar a escuchar';
 }

lib/l10n/gen/app_localizations_hi.dart

@@ -1586,4 +1586,34 @@ class AppLocalizationsHi extends AppLocalizations {
 
   @override
   String get localMusicFolderGenericName => 'चयनित फ़ोल्डर';
+
+  @override
+  String get welcomeHeadline => 'Tu mundo, en directo';
+
+  @override
+  String get welcomeBody =>
+      '53.412 emisoras de 238 países. Guardá tus favoritas, llevalas al auto y despertate con ellas.';
+
+  @override
+  String get welcomeBullet1Title => 'Ecualizador por emisora';
+
+  @override
+  String get welcomeBullet1Subtitle => 'Y un preset por dispositivo de salida';
+
+  @override
+  String get welcomeBullet2Title => 'Android Auto';
+
+  @override
+  String get welcomeBullet2Subtitle =>
+      'Tus favoritas y tu música local en el auto';
+
+  @override
+  String get welcomeBullet3Title => 'Alarmas musicales';
+
+  @override
+  String get welcomeBullet3Subtitle =>
+      'Con subida progresiva y modo vacaciones';
+
+  @override
+  String get welcomeCtaLabel => 'Empezar a escuchar';
 }

lib/l10n/gen/app_localizations_id.dart

@@ -1592,4 +1592,34 @@ class AppLocalizationsId extends AppLocalizations {
 
   @override
   String get localMusicFolderGenericName => 'Folder terpilih';
+
+  @override
+  String get welcomeHeadline => 'Tu mundo, en directo';
+
+  @override
+  String get welcomeBody =>
+      '53.412 emisoras de 238 países. Guardá tus favoritas, llevalas al auto y despertate con ellas.';
+
+  @override
+  String get welcomeBullet1Title => 'Ecualizador por emisora';
+
+  @override
+  String get welcomeBullet1Subtitle => 'Y un preset por dispositivo de salida';
+
+  @override
+  String get welcomeBullet2Title => 'Android Auto';
+
+  @override
+  String get welcomeBullet2Subtitle =>
+      'Tus favoritas y tu música local en el auto';
+
+  @override
+  String get welcomeBullet3Title => 'Alarmas musicales';
+
+  @override
+  String get welcomeBullet3Subtitle =>
+      'Con subida progresiva y modo vacaciones';
+
+  @override
+  String get welcomeCtaLabel => 'Empezar a escuchar';
 }

lib/l10n/gen/app_localizations_it.dart

@@ -1598,4 +1598,34 @@ class AppLocalizationsIt extends AppLocalizations {
 
   @override
   String get localMusicFolderGenericName => 'Cartella selezionata';
+
+  @override
+  String get welcomeHeadline => 'Tu mundo, en directo';
+
+  @override
+  String get welcomeBody =>
+      '53.412 emisoras de 238 países. Guardá tus favoritas, llevalas al auto y despertate con ellas.';
+
+  @override
+  String get welcomeBullet1Title => 'Ecualizador por emisora';
+
+  @override
+  String get welcomeBullet1Subtitle => 'Y un preset por dispositivo de salida';
+
+  @override
+  String get welcomeBullet2Title => 'Android Auto';
+
+  @override
+  String get welcomeBullet2Subtitle =>
+      'Tus favoritas y tu música local en el auto';
+
+  @override
+  String get welcomeBullet3Title => 'Alarmas musicales';
+
+  @override
+  String get welcomeBullet3Subtitle =>
+      'Con subida progresiva y modo vacaciones';
+
+  @override
+  String get welcomeCtaLabel => 'Empezar a escuchar';
 }

lib/l10n/gen/app_localizations_ja.dart

@@ -1545,4 +1545,34 @@ class AppLocalizationsJa extends AppLocalizations {
 
   @override
   String get localMusicFolderGenericName => '選択したフォルダー';
+
+  @override
+  String get welcomeHeadline => 'Tu mundo, en directo';
+
+  @override
+  String get welcomeBody =>
+      '53.412 emisoras de 238 países. Guardá tus favoritas, llevalas al auto y despertate con ellas.';
+
+  @override
+  String get welcomeBullet1Title => 'Ecualizador por emisora';
+
+  @override
+  String get welcomeBullet1Subtitle => 'Y un preset por dispositivo de salida';
+
+  @override
+  String get welcomeBullet2Title => 'Android Auto';
+
+  @override
+  String get welcomeBullet2Subtitle =>
+      'Tus favoritas y tu música local en el auto';
+
+  @override
+  String get welcomeBullet3Title => 'Alarmas musicales';
+
+  @override
+  String get welcomeBullet3Subtitle =>
+      'Con subida progresiva y modo vacaciones';
+
+  @override
+  String get welcomeCtaLabel => 'Empezar a escuchar';
 }

lib/l10n/gen/app_localizations_pt.dart

@@ -1590,4 +1590,34 @@ class AppLocalizationsPt extends AppLocalizations {
 
   @override
   String get localMusicFolderGenericName => 'Pasta selecionada';
+
+  @override
+  String get welcomeHeadline => 'Tu mundo, en directo';
+
+  @override
+  String get welcomeBody =>
+      '53.412 emisoras de 238 países. Guardá tus favoritas, llevalas al auto y despertate con ellas.';
+
+  @override
+  String get welcomeBullet1Title => 'Ecualizador por emisora';
+
+  @override
+  String get welcomeBullet1Subtitle => 'Y un preset por dispositivo de salida';
+
+  @override
+  String get welcomeBullet2Title => 'Android Auto';
+
+  @override
+  String get welcomeBullet2Subtitle =>
+      'Tus favoritas y tu música local en el auto';
+
+  @override
+  String get welcomeBullet3Title => 'Alarmas musicales';
+
+  @override
+  String get welcomeBullet3Subtitle =>
+      'Con subida progresiva y modo vacaciones';
+
+  @override
+  String get welcomeCtaLabel => 'Empezar a escuchar';
 }

lib/l10n/gen/app_localizations_ru.dart

@@ -1594,4 +1594,34 @@ class AppLocalizationsRu extends AppLocalizations {
 
   @override
   String get localMusicFolderGenericName => 'Выбранная папка';
+
+  @override
+  String get welcomeHeadline => 'Tu mundo, en directo';
+
+  @override
+  String get welcomeBody =>
+      '53.412 emisoras de 238 países. Guardá tus favoritas, llevalas al auto y despertate con ellas.';
+
+  @override
+  String get welcomeBullet1Title => 'Ecualizador por emisora';
+
+  @override
+  String get welcomeBullet1Subtitle => 'Y un preset por dispositivo de salida';
+
+  @override
+  String get welcomeBullet2Title => 'Android Auto';
+
+  @override
+  String get welcomeBullet2Subtitle =>
+      'Tus favoritas y tu música local en el auto';
+
+  @override
+  String get welcomeBullet3Title => 'Alarmas musicales';
+
+  @override
+  String get welcomeBullet3Subtitle =>
+      'Con subida progresiva y modo vacaciones';
+
+  @override
+  String get welcomeCtaLabel => 'Empezar a escuchar';
 }

lib/l10n/gen/app_localizations_zh.dart

@@ -1537,4 +1537,34 @@ class AppLocalizationsZh extends AppLocalizations {
 
   @override
   String get localMusicFolderGenericName => '已选文件夹';
+
+  @override
+  String get welcomeHeadline => 'Tu mundo, en directo';
+
+  @override
+  String get welcomeBody =>
+      '53.412 emisoras de 238 países. Guardá tus favoritas, llevalas al auto y despertate con ellas.';
+
+  @override
+  String get welcomeBullet1Title => 'Ecualizador por emisora';
+
+  @override
+  String get welcomeBullet1Subtitle => 'Y un preset por dispositivo de salida';
+
+  @override
+  String get welcomeBullet2Title => 'Android Auto';
+
+  @override
+  String get welcomeBullet2Subtitle =>
+      'Tus favoritas y tu música local en el auto';
+
+  @override
+  String get welcomeBullet3Title => 'Alarmas musicales';
+
+  @override
+  String get welcomeBullet3Subtitle =>
+      'Con subida progresiva y modo vacaciones';
+
+  @override
+  String get welcomeCtaLabel => 'Empezar a escuchar';
 }

lib/pantallas/pantalla_bienvenida.dart

@@ -0,0 +1,169 @@
+import 'package:flutter/material.dart';
+import 'package:provider/provider.dart';
+
+import '../estado/estado_navegacion.dart';
+import '../l10n/gen/app_localizations.dart';
+import '../tema/pluriwave_theme.dart';
+
+/// WU17: first-run welcome surface (`onboarding-welcome` spec, mockup
+/// screen 14) rebuilt WITHOUT its monetization content — no "PRO" pill, no
+/// "14 días" trial line, no pricing card, and no secondary "free version"
+/// link (binding no-monetization requirement). Content only: logo,
+/// headline, body copy, exactly 3 feature bullets, and the single
+/// "Empezar a escuchar" CTA.
+///
+/// A full-screen ROUTE, not a modal `Dialog` — deliberately distinct from
+/// the pre-existing `PluriOnboardingDialog` (an unrelated "what's new"
+/// help-content modal already shown from `app.dart`'s launch flow). This
+/// work unit's own task list and verify command scope to this screen in
+/// isolation; wiring it into the real first-launch flow (i.e. deciding
+/// when `app.dart`/`main.dart` should push it) is not part of WU17.
+class PantallaBienvenida extends StatelessWidget {
+  const PantallaBienvenida({super.key});
+
+  @override
+  Widget build(BuildContext context) {
+    final l10n = AppLocalizations.of(context);
+    final t = context.pluriTokens;
+    final theme = Theme.of(context);
+
+    return Scaffold(
+      body: SafeArea(
+        child: SingleChildScrollView(
+          padding: const EdgeInsets.fromLTRB(24, 48, 24, 28),
+          child: Column(
+            crossAxisAlignment: CrossAxisAlignment.stretch,
+            children: [
+              Image.asset(
+                'assets/icons/pluriwave_app_mark.png',
+                width: 76,
+                height: 76,
+                errorBuilder:
+                    (_, __, ___) => Icon(
+                      Icons.graphic_eq_rounded,
+                      size: 76,
+                      color: t.electricMagenta,
+                    ),
+              ),
+              const SizedBox(height: 22),
+              Text(
+                l10n.welcomeHeadline,
+                style: theme.textTheme.headlineMedium?.copyWith(
+                  fontWeight: FontWeight.w800,
+                  height: 1.05,
+                  letterSpacing: -1.0,
+                ),
+              ),
+              const SizedBox(height: 12),
+              Text(
+                l10n.welcomeBody,
+                style: theme.textTheme.bodyMedium?.copyWith(
+                  color: theme.colorScheme.onSurface.withValues(alpha: 0.72),
+                  height: 1.5,
+                ),
+              ),
+              const SizedBox(height: 28),
+              FilaCaracteristicaBienvenida(
+                icon: Icons.equalizer_rounded,
+                iconColor: t.electricMagenta,
+                titulo: l10n.welcomeBullet1Title,
+                subtitulo: l10n.welcomeBullet1Subtitle,
+              ),
+              const SizedBox(height: 16),
+              FilaCaracteristicaBienvenida(
+                icon: Icons.directions_car_rounded,
+                iconColor: t.liveGreen,
+                titulo: l10n.welcomeBullet2Title,
+                subtitulo: l10n.welcomeBullet2Subtitle,
+              ),
+              const SizedBox(height: 16),
+              FilaCaracteristicaBienvenida(
+                icon: Icons.alarm_rounded,
+                iconColor: t.warmCoral,
+                titulo: l10n.welcomeBullet3Title,
+                subtitulo: l10n.welcomeBullet3Subtitle,
+              ),
+              const SizedBox(height: 32),
+              SizedBox(
+                height: 58,
+                child: FilledButton(
+                  onPressed: () => _empezar(context),
+                  child: Text(
+                    l10n.welcomeCtaLabel,
+                    style: const TextStyle(
+                      fontSize: 16,
+                      fontWeight: FontWeight.w800,
+                    ),
+                  ),
+                ),
+              ),
+            ],
+          ),
+        ),
+      ),
+    );
+  }
+
+  void _empezar(BuildContext context) {
+    context.read<EstadoNavegacionRaiz>().irA(RaizPluriWave.escuchar);
+    Navigator.of(context).pop();
+  }
+}
+
+/// One icon-badge + title/subtitle row. Public (not `_FilaCaracteristica`)
+/// so the structural "exactly 3 feature bullets" guard in
+/// `pantalla_bienvenida_test.dart` can target it via `find.byType` — the
+/// same reason WU4 made `FormularioEmisoraPersonalizada` public.
+class FilaCaracteristicaBienvenida extends StatelessWidget {
+  const FilaCaracteristicaBienvenida({
+    super.key,
+    required this.icon,
+    required this.iconColor,
+    required this.titulo,
+    required this.subtitulo,
+  });
+
+  final IconData icon;
+  final Color iconColor;
+  final String titulo;
+  final String subtitulo;
+
+  @override
+  Widget build(BuildContext context) {
+    final theme = Theme.of(context);
+    return Row(
+      crossAxisAlignment: CrossAxisAlignment.start,
+      children: [
+        Container(
+          width: 38,
+          height: 38,
+          decoration: BoxDecoration(
+            color: iconColor.withValues(alpha: 0.16),
+            borderRadius: BorderRadius.circular(11),
+          ),
+          child: Icon(icon, size: 20, color: iconColor),
+        ),
+        const SizedBox(width: 13),
+        Expanded(
+          child: Column(
+            crossAxisAlignment: CrossAxisAlignment.start,
+            children: [
+              Text(
+                titulo,
+                style: theme.textTheme.bodyMedium?.copyWith(
+                  fontWeight: FontWeight.w800,
+                ),
+              ),
+              Text(
+                subtitulo,
+                style: theme.textTheme.bodySmall?.copyWith(
+                  color: theme.colorScheme.onSurface.withValues(alpha: 0.58),
+                ),
+              ),
+            ],
+          ),
+        ),
+      ],
+    );
+  }
+}

openspec/changes/rediseno-funcional/tasks.md

@@ -56,7 +56,7 @@
 | 15 | `feat(grabaciones): add recordings library screen` | 3b | ~~300-400~~ → **REALIZED: 1,767** (1,767+ / 0-, 22 files) | Medium | Monitor§ |
 | 15b | `fix(grabaciones): wire the recordings library into Settings navigation` | 15 | 60-100 | Low | No |
 | 16 | `feat(connectivity): restyle offline and reconnect banners` | 1 | 150-250 | Low | No |
-| 17 | `feat(bienvenida): add monetization-free welcome screen` | 1 | 150-200 | Low | No |
+| 17 | `feat(bienvenida): add monetization-free welcome screen` | 1 | ~~150-200~~ → **REALIZED: 361** (screen + test, 313 / ARB 22 / docs 48) — see the WU15-precedent note below | Low | No — same reasoning as WU15§ |
 | 18 | `feat(i18n): add redesign strings and translate Escuchar rename to 11 locales` | all | ~0 eng. / 400-600 data | Medium (data volume, low logic risk) | No |
 
 \* **Re-derived after WU3a landed.** The original 500-700 figure was scaled pro-rata from WU3a's *estimate*, which
@@ -85,6 +85,11 @@ unlike WU3a/WU3b's move-only reuse), or (c) the new `servicio_grabacion_radio.da
 group. Realized 1,767 changed lines / 22 files, all additions (no deletions — nothing pre-existing was touched
 beyond the 3 new `ServicioGrabacionRadio`/`EstadoGrabacion` methods). Not recorded as `size:exception` since the
 commit is still a single, cleanly-scoped deliverable (one new screen, its one dependency, no split candidate).
+**WU17 hit the identical pattern**: 150-200 covered only the screen itself; realized 361 lines across the screen
+(169) + its test (144) + 9 new ARB keys × 2 locales (22) + this docs update (48), PLUS 13 regenerated
+`lib/l10n/gen/*.dart` files (~430 more lines, untouched by hand) for a raw `git diff --stat` total of 814. Same
+ruling: not `size:exception` — one new, cleanly-scoped screen with no split candidate, all-additions except the ARB
+files (which gain lines, not churn).
 
 ```text
 Decision needed before apply: No
@@ -1013,19 +1018,45 @@ real capability living in the header, not decorative chrome).
 **Verify**: `flutter test test/pantallas/pantalla_bienvenida_test.dart && flutter analyze && dart format --set-exit-if-changed $(git diff --name-only --diff-filter=ACM HEAD -- '*.dart')`
 **New tests**: `pantalla_bienvenida_test.dart`
 
-- [ ] 17.1 RED — the welcome screen renders as a full-screen route (not a modal `Dialog`) with a logo, headline,
+- [x] 17.1 RED — the welcome screen renders as a full-screen route (not a modal `Dialog`) with a logo, headline,
-       body copy, exactly 3 feature bullets, and exactly 1 primary CTA.
+       body copy, exactly 3 feature bullets, and exactly 1 primary CTA. **Discovered at apply time**: a pre-existing,
-- [ ] 17.2 RED — binding no-monetization guard: scan the rendered widget tree's text content and assert it contains
+       UNRELATED `PluriOnboardingDialog` (a "what's new"/help-content modal loaded from markdown assets, shown from
+       `app.dart`'s launch flow) already exists — it is NOT the mockup's welcome screen and is not touched or
+       replaced by this WU.
+- [x] 17.2 RED — binding no-monetization guard: scan the rendered widget tree's text content and assert it contains
        none of: the substring "PRO", a currency amount, or a day-count trial phrase; no secondary "free version"
        link.
-- [ ] 17.3 RED — tapping "Empezar a escuchar" lands on the Escuchar tab (index 0) with the welcome route removed
+- [x] 17.3 RED — tapping "Empezar a escuchar" lands on the Escuchar tab (index 0) with the welcome route removed
-       from the back stack.
+       from the back stack. Test starts `EstadoNavegacionRaiz` on a DIFFERENT tab first so a pass actually proves
-- [ ] 17.4 GREEN — build `lib/pantallas/pantalla_bienvenida.dart` as a full-screen route; content only (logo /
+       `irA()` ran, not just that escuchar was already the default.
-       headline / body / 3 bullets / 1 CTA) — no PRO pill, no trial duration, no price, no secondary link.
+- [x] 17.4 GREEN — built `lib/pantallas/pantalla_bienvenida.dart` as a full-screen route (bare `Scaffold`, no
-- [ ] 17.5 GREEN — wire the CTA to dismiss-and-navigate to Escuchar with the route removed.
+       `PluriPushScaffold` — this is an entry screen with no back affordance, not a second-level pushed screen);
-- [ ] 17.6 REFACTOR — grep `lib/l10n/app_*.arb` for "PRO"/price/day-count trial strings introduced by this WU;
+       content only (logo / headline / body / 3 bullets / 1 CTA) — no PRO pill, no trial duration, no price, no
-       confirm none exist.
+       secondary link. Content is the mockup's screen 14 copy verbatim MINUS its entire monetization block (the "14
-- [ ] 17.7 Verify — all 3 scenario tests green; grep scan clean.
+       días PRO gratis / luego 2,99 €/año" pricing card and the "Seguir con la versión gratuita" link), Spanish
+       re-cast to the app's established voseo register (the raw mockup HTML uses "tú" form; the other ~750 lines of
+       `app_es.arb` consistently use voseo — e.g. "Elegí", "Guardá", "querés" — matched that instead of copying the
+       mockup's grammar verbatim) and "auto" instead of the mockup's "coche" (matching the one existing precedent at
+       `localMusicSectionDescription`). The 3 bullet icon colours reuse existing named tokens
+       (`electricMagenta`/`liveGreen`/`warmCoral`) that happen to be the exact hex values the mockup already used for
+       those 3 icons — no new raw `Color(0x...)` literal introduced. `SingleChildScrollView` used instead of a
+       `Column` + `Spacer()` (the exact overflow hazard WU14 already hit and fixed) since this screen carries
+       meaningfully more content than a typical card. 9 new ARB keys, en/es only (`welcomeHeadline`, `welcomeBody`,
+       `welcomeBullet{1,2,3}{Title,Subtitle}`, `welcomeCtaLabel`).
+- [x] 17.5 GREEN — CTA wired to `context.read<EstadoNavegacionRaiz>().irA(RaizPluriWave.escuchar)` then
+       `Navigator.of(context).pop()`. **Scope note**: this WU's own verify command and task list only cover
+       `pantalla_bienvenida_test.dart` — wiring the screen into the REAL first-launch flow (i.e. `app.dart`/
+       `main.dart` deciding *when* to push it, analogous to `ServicioContenidoApp.debeMostrarInicio()`'s pattern for
+       `PluriOnboardingDialog`) is NOT part of WU17 as scoped and was deliberately not added here to avoid inventing
+       untested persistence/launch semantics. Flagged as a likely WU17b gap (same shape as WU15/WU15b).
+- [x] 17.6 REFACTOR — whole-repo grep confirmed clean: `\bPRO\b` (word-boundary) has exactly one hit in all of
+       `lib/` — this WU's own doc comment describing the guard (never rendered). The unqualified substring "PRO"
+       also matches pre-existing, unrelated `"PROGRAMADOS"` (vacation-alarms section title, WU9) and
+       `pluri_premium_widgets.dart` (a pre-existing decorative-hero-card widget file name, "premium" as in visual
+       styling, not a paid tier) — both false positives for a naive substring check, neither a monetization string.
+       No day-count trial phrase, no €/$ amount, no "gratuita"/"gratis"/"free version" string anywhere in
+       `lib/l10n/app_*.arb` or `lib/`.
+- [x] 17.7 Verify — all 3 scenario tests green; grep scan clean.
 
 ## WU18 — i18n batch (all 13 locales)
 

test/pantallas/pantalla_bienvenida_test.dart

@@ -0,0 +1,144 @@
+import 'dart:async';
+
+import 'package:flutter/material.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:pluriwave/estado/estado_navegacion.dart';
+import 'package:pluriwave/l10n/gen/app_localizations.dart';
+import 'package:pluriwave/pantallas/pantalla_bienvenida.dart';
+import 'package:provider/provider.dart';
+
+/// WU17: `onboarding-welcome` spec — full-screen route (not a modal),
+/// content only (logo/headline/body/3 bullets/1 CTA), binding
+/// no-monetization guard, and CTA dismisses to Escuchar with the route
+/// popped.
+Widget _app({required EstadoNavegacionRaiz navegacion}) {
+  return ChangeNotifierProvider<EstadoNavegacionRaiz>.value(
+    value: navegacion,
+    child: const MaterialApp(
+      locale: Locale('es'),
+      localizationsDelegates: AppLocalizations.localizationsDelegates,
+      supportedLocales: AppLocalizations.supportedLocales,
+      home: PantallaBienvenida(),
+    ),
+  );
+}
+
+void main() {
+  testWidgets(
+    'renders as a full-screen route with a logo, headline, body copy, '
+    'exactly 3 feature bullets, and exactly one primary CTA',
+    (tester) async {
+      final navegacion = EstadoNavegacionRaiz();
+      addTearDown(navegacion.dispose);
+
+      await tester.pumpWidget(_app(navegacion: navegacion));
+      await tester.pumpAndSettle();
+
+      // A full-screen route, never a modal dialog.
+      expect(find.byType(Dialog), findsNothing);
+      expect(find.byType(AlertDialog), findsNothing);
+      expect(find.byType(Scaffold), findsOneWidget);
+
+      expect(find.byType(Image), findsOneWidget, reason: 'the logo mark');
+      expect(find.text('Tu mundo, en directo'), findsOneWidget);
+      expect(
+        find.textContaining('53.412 emisoras de 238 países'),
+        findsOneWidget,
+      );
+      expect(
+        find.byType(FilaCaracteristicaBienvenida),
+        findsNWidgets(3),
+        reason: 'exactly 3 feature bullets',
+      );
+      expect(
+        find.byType(FilledButton),
+        findsOneWidget,
+        reason: 'exactly 1 primary CTA',
+      );
+      expect(find.text('Empezar a escuchar'), findsOneWidget);
+    },
+  );
+
+  testWidgets('rendered content contains no monetization strings', (
+    tester,
+  ) async {
+    final navegacion = EstadoNavegacionRaiz();
+    addTearDown(navegacion.dispose);
+
+    await tester.pumpWidget(_app(navegacion: navegacion));
+    await tester.pumpAndSettle();
+
+    final textoCompleto = tester
+        .widgetList<Text>(find.byType(Text))
+        .map((widget) => widget.data ?? '')
+        .join('\n');
+
+    expect(textoCompleto.contains('PRO'), isFalse);
+    expect(textoCompleto.contains('€'), isFalse);
+    expect(textoCompleto.contains(r'$'), isFalse);
+    expect(
+      RegExp(r'\d+\s*d[ií]as?\b', caseSensitive: false).hasMatch(
+        textoCompleto,
+      ),
+      isFalse,
+      reason: 'no day-count trial phrase (e.g. "14 días")',
+    );
+    expect(
+      find.textContaining('gratuita', findRichText: true),
+      findsNothing,
+      reason: 'no secondary "free version" link',
+    );
+    expect(
+      find.textContaining('gratis', findRichText: true),
+      findsNothing,
+      reason: 'no secondary "free version" link',
+    );
+    // Only one tappable action on the whole screen: the primary CTA.
+    expect(find.byType(TextButton), findsNothing);
+    expect(find.byType(FilledButton), findsOneWidget);
+  });
+
+  testWidgets(
+    'tapping the primary CTA switches to Escuchar and pops the welcome route',
+    (tester) async {
+      // Start on a DIFFERENT tab so a pass actually proves irA() ran,
+      // rather than coasting on EstadoNavegacionRaiz's own escuchar default.
+      final navegacion = EstadoNavegacionRaiz()
+        ..irA(RaizPluriWave.ajustes);
+      addTearDown(navegacion.dispose);
+      final navigatorKey = GlobalKey<NavigatorState>();
+
+      await tester.pumpWidget(
+        ChangeNotifierProvider<EstadoNavegacionRaiz>.value(
+          value: navegacion,
+          child: MaterialApp(
+            navigatorKey: navigatorKey,
+            locale: const Locale('es'),
+            localizationsDelegates: AppLocalizations.localizationsDelegates,
+            supportedLocales: AppLocalizations.supportedLocales,
+            home: const Scaffold(body: Center(child: Text('home stand-in'))),
+          ),
+        ),
+      );
+
+      unawaited(
+        navigatorKey.currentState!.push(
+          MaterialPageRoute<void>(builder: (_) => const PantallaBienvenida()),
+        ),
+      );
+      await tester.pumpAndSettle();
+      expect(find.byType(PantallaBienvenida), findsOneWidget);
+
+      await tester.tap(find.text('Empezar a escuchar'));
+      await tester.pumpAndSettle();
+
+      expect(navegacion.actual, RaizPluriWave.escuchar);
+      expect(
+        find.byType(PantallaBienvenida),
+        findsNothing,
+        reason: 'the welcome route was removed from the back stack',
+      );
+      expect(find.text('home stand-in'), findsOneWidget);
+    },
+  );
+}