fix(buscar): rebuild the offline banner with offlineAccent

Audit 13.1 (t4 line 641): the banner rendered wifi_off in
colorScheme.error (red) inside a generic glass card. Rebuilt using
offlineAccent (#E8879A) — a token that existed since Tier 1 with no
consumer — for the tint, border and icon, plus the prototype's title/
detail layout and a restyled Retry chip. New offlineBannerTitle key
translated to all 13 locales.

lib/l10n/app_ar.arb

@@ -306,6 +306,7 @@
   "detectAction": "اكتشاف",
   "liveRadar": "رادار مباشر",
   "genresTitle": "الأنواع",
+  "offlineBannerTitle": "لا يوجد اتصال",
   "retryAction": "إعادة المحاولة",
   "noStationsAvailable": "لا توجد محطات متاحة",
   "noStationsAvailableSubtitle": "جرّب التحديث أو اختيار نوع آخر لالتقاط الإشارة من جديد.",

lib/l10n/app_bn.arb

@@ -306,6 +306,7 @@
   "detectAction": "সনাক্ত করুন",
   "liveRadar": "লাইভ রাডার",
   "genresTitle": "ধরন",
+  "offlineBannerTitle": "সংযোগ নেই",
   "retryAction": "আবার চেষ্টা করুন",
   "noStationsAvailable": "কোনো স্টেশন উপলব্ধ নেই",
   "noStationsAvailableSubtitle": "সিগন্যাল আবার ধরতে রিফ্রেশ করুন বা অন্য ধরন বেছে নিন।",

lib/l10n/app_de.arb

@@ -306,6 +306,7 @@
   "detectAction": "Erkennen",
   "liveRadar": "Live-Radar",
   "genresTitle": "Genres",
+  "offlineBannerTitle": "Keine Verbindung",
   "retryAction": "Erneut versuchen",
   "noStationsAvailable": "Keine Sender verfügbar",
   "noStationsAvailableSubtitle": "Versuche zu aktualisieren oder ein anderes Genre auszuwählen, um wieder ein Signal zu empfangen.",

lib/l10n/app_en.arb

@@ -369,6 +369,7 @@
   "detectAction": "Detect",
   "liveRadar": "Live radar",
   "genresTitle": "Genres",
+  "offlineBannerTitle": "No connection",
   "retryAction": "Retry",
   "noStationsAvailable": "No stations available",
   "noStationsAvailableSubtitle": "Try refreshing or choosing another genre to capture a signal again.",

lib/l10n/app_es.arb

@@ -369,6 +369,7 @@
   "detectAction": "Detectar",
   "liveRadar": "Radar en directo",
   "genresTitle": "Géneros",
+  "offlineBannerTitle": "Sin conexión",
   "retryAction": "Reintentar",
   "noStationsAvailable": "No hay emisoras disponibles",
   "noStationsAvailableSubtitle": "Probá refrescar o elegir otro género para volver a capturar señal.",

lib/l10n/app_fr.arb

@@ -306,6 +306,7 @@
   "detectAction": "Détecter",
   "liveRadar": "Radar en direct",
   "genresTitle": "Genres",
+  "offlineBannerTitle": "Aucune connexion",
   "retryAction": "Réessayer",
   "noStationsAvailable": "Aucune station disponible",
   "noStationsAvailableSubtitle": "Essayez d’actualiser ou de choisir un autre genre pour capter à nouveau un signal.",

lib/l10n/app_hi.arb

@@ -306,6 +306,7 @@
   "detectAction": "पहचानें",
   "liveRadar": "लाइव रडार",
   "genresTitle": "शैलियाँ",
+  "offlineBannerTitle": "कोई कनेक्शन नहीं",
   "retryAction": "फिर कोशिश करें",
   "noStationsAvailable": "कोई स्टेशन उपलब्ध नहीं",
   "noStationsAvailableSubtitle": "सिग्नल फिर पकड़ने के लिए रीफ़्रेश करें या दूसरी शैली चुनें।",

lib/l10n/app_id.arb

@@ -306,6 +306,7 @@
   "detectAction": "Deteksi",
   "liveRadar": "Radar langsung",
   "genresTitle": "Genre",
+  "offlineBannerTitle": "Tidak ada koneksi",
   "retryAction": "Coba lagi",
   "noStationsAvailable": "Tidak ada stasiun tersedia",
   "noStationsAvailableSubtitle": "Coba segarkan atau pilih genre lain untuk menangkap sinyal kembali.",

lib/l10n/app_it.arb

@@ -306,6 +306,7 @@
   "detectAction": "Rileva",
   "liveRadar": "Radar live",
   "genresTitle": "Generi",
+  "offlineBannerTitle": "Nessuna connessione",
   "retryAction": "Riprova",
   "noStationsAvailable": "Nessuna emittente disponibile",
   "noStationsAvailableSubtitle": "Prova ad aggiornare o a scegliere un altro genere per captare di nuovo un segnale.",

lib/l10n/app_ja.arb

@@ -306,6 +306,7 @@
   "detectAction": "検出",
   "liveRadar": "ライブレーダー",
   "genresTitle": "ジャンル",
+  "offlineBannerTitle": "接続なし",
   "retryAction": "再試行",
   "noStationsAvailable": "利用できる局がありません",
   "noStationsAvailableSubtitle": "再読み込みするか別のジャンルを選んで、もう一度電波をつかまえてください。",

lib/l10n/app_pt.arb

@@ -306,6 +306,7 @@
   "detectAction": "Detectar",
   "liveRadar": "Radar ao vivo",
   "genresTitle": "Gêneros",
+  "offlineBannerTitle": "Sem conexão",
   "retryAction": "Tentar novamente",
   "noStationsAvailable": "Não há estações disponíveis",
   "noStationsAvailableSubtitle": "Tente atualizar ou escolher outro gênero para captar sinal novamente.",

lib/l10n/app_ru.arb

@@ -306,6 +306,7 @@
   "detectAction": "Определить",
   "liveRadar": "Радар в эфире",
   "genresTitle": "Жанры",
+  "offlineBannerTitle": "Нет подключения",
   "retryAction": "Повторить",
   "noStationsAvailable": "Нет доступных станций",
   "noStationsAvailableSubtitle": "Попробуйте обновить или выбрать другой жанр, чтобы снова поймать сигнал.",

lib/l10n/app_zh.arb

@@ -306,6 +306,7 @@
   "detectAction": "检测",
   "liveRadar": "直播雷达",
   "genresTitle": "类型",
+  "offlineBannerTitle": "无连接",
   "retryAction": "重试",
   "noStationsAvailable": "没有可用电台",
   "noStationsAvailableSubtitle": "尝试刷新或选择其他类型，重新捕捉信号。",

lib/l10n/gen/app_localizations.dart

@@ -1438,6 +1438,12 @@ abstract class AppLocalizations {
   /// **'Géneros'**
   String get genresTitle;
 
+  /// No description provided for @offlineBannerTitle.
+  ///
+  /// In es, this message translates to:
+  /// **'Sin conexión'**
+  String get offlineBannerTitle;
+
   /// No description provided for @retryAction.
   ///
   /// In es, this message translates to:

lib/l10n/gen/app_localizations_ar.dart

@@ -766,6 +766,9 @@ class AppLocalizationsAr extends AppLocalizations {
   @override
   String get genresTitle => 'الأنواع';
 
+  @override
+  String get offlineBannerTitle => 'لا يوجد اتصال';
+
   @override
   String get retryAction => 'إعادة المحاولة';
 

lib/l10n/gen/app_localizations_bn.dart

@@ -769,6 +769,9 @@ class AppLocalizationsBn extends AppLocalizations {
   @override
   String get genresTitle => 'ধরন';
 
+  @override
+  String get offlineBannerTitle => 'সংযোগ নেই';
+
   @override
   String get retryAction => 'আবার চেষ্টা করুন';
 

lib/l10n/gen/app_localizations_de.dart

@@ -772,6 +772,9 @@ class AppLocalizationsDe extends AppLocalizations {
   @override
   String get genresTitle => 'Genres';
 
+  @override
+  String get offlineBannerTitle => 'Keine Verbindung';
+
   @override
   String get retryAction => 'Erneut versuchen';
 

lib/l10n/gen/app_localizations_en.dart

@@ -765,6 +765,9 @@ class AppLocalizationsEn extends AppLocalizations {
   @override
   String get genresTitle => 'Genres';
 
+  @override
+  String get offlineBannerTitle => 'No connection';
+
   @override
   String get retryAction => 'Retry';
 

lib/l10n/gen/app_localizations_es.dart

@@ -770,6 +770,9 @@ class AppLocalizationsEs extends AppLocalizations {
   @override
   String get genresTitle => 'Géneros';
 
+  @override
+  String get offlineBannerTitle => 'Sin conexión';
+
   @override
   String get retryAction => 'Reintentar';
 

lib/l10n/gen/app_localizations_fr.dart

@@ -774,6 +774,9 @@ class AppLocalizationsFr extends AppLocalizations {
   @override
   String get genresTitle => 'Genres';
 
+  @override
+  String get offlineBannerTitle => 'Aucune connexion';
+
   @override
   String get retryAction => 'Réessayer';
 

lib/l10n/gen/app_localizations_hi.dart

@@ -766,6 +766,9 @@ class AppLocalizationsHi extends AppLocalizations {
   @override
   String get genresTitle => 'शैलियाँ';
 
+  @override
+  String get offlineBannerTitle => 'कोई कनेक्शन नहीं';
+
   @override
   String get retryAction => 'फिर कोशिश करें';
 

lib/l10n/gen/app_localizations_id.dart

@@ -766,6 +766,9 @@ class AppLocalizationsId extends AppLocalizations {
   @override
   String get genresTitle => 'Genre';
 
+  @override
+  String get offlineBannerTitle => 'Tidak ada koneksi';
+
   @override
   String get retryAction => 'Coba lagi';
 

lib/l10n/gen/app_localizations_it.dart

@@ -772,6 +772,9 @@ class AppLocalizationsIt extends AppLocalizations {
   @override
   String get genresTitle => 'Generi';
 
+  @override
+  String get offlineBannerTitle => 'Nessuna connessione';
+
   @override
   String get retryAction => 'Riprova';
 

lib/l10n/gen/app_localizations_ja.dart

@@ -740,6 +740,9 @@ class AppLocalizationsJa extends AppLocalizations {
   @override
   String get genresTitle => 'ジャンル';
 
+  @override
+  String get offlineBannerTitle => '接続なし';
+
   @override
   String get retryAction => '再試行';
 

lib/l10n/gen/app_localizations_pt.dart

@@ -769,6 +769,9 @@ class AppLocalizationsPt extends AppLocalizations {
   @override
   String get genresTitle => 'Gêneros';
 
+  @override
+  String get offlineBannerTitle => 'Sem conexão';
+
   @override
   String get retryAction => 'Tentar novamente';
 

lib/l10n/gen/app_localizations_ru.dart

@@ -770,6 +770,9 @@ class AppLocalizationsRu extends AppLocalizations {
   @override
   String get genresTitle => 'Жанры';
 
+  @override
+  String get offlineBannerTitle => 'Нет подключения';
+
   @override
   String get retryAction => 'Повторить';
 

lib/l10n/gen/app_localizations_zh.dart

@@ -737,6 +737,9 @@ class AppLocalizationsZh extends AppLocalizations {
   @override
   String get genresTitle => '类型';
 
+  @override
+  String get offlineBannerTitle => '无连接';
+
   @override
   String get retryAction => '重试';
 

lib/pantallas/pantalla_buscar.dart

@@ -7,6 +7,7 @@ import '../estado/estado_radio.dart';
 import '../l10n/gen/app_localizations.dart';
 import '../modelos/emisora.dart';
 import '../tema/pluri_animate.dart';
+import '../tema/pluriwave_theme.dart';
 import '../widgets/pluri_glass_surface.dart';
 import '../widgets/pluri_icon.dart';
 import '../widgets/pluri_layout.dart';
@@ -847,26 +848,81 @@ class _PantallaBuscarState extends State<PantallaBuscar> {
     );
   }
 
+  // Audit 13.1 (t4 line 641): the prototype's offline banner is a
+  // rgba(207,102,121,X) tinted card — this consolidates on the ONE
+  // `offlineAccent` token (`#E8879A`) the proposal named for this exact
+  // banner (`pluriwave_tokens.dart:77`), which existed unused until now,
+  // rather than introducing a second near-identical raw hex for the tint.
   Widget _errorBanner(
     BuildContext context,
     String error,
     ThemeData theme,
     AppLocalizations l10n,
   ) {
+    final tokens = context.pluriTokens;
     return Padding(
-      padding: const EdgeInsets.all(16),
+      padding: const EdgeInsets.symmetric(horizontal: 16),
-      child: PluriGlassSurface(
+      child: DecoratedBox(
-        padding: const EdgeInsets.all(12),
+        key: const ValueKey('offline-banner'),
-        child: Row(
+        decoration: BoxDecoration(
-          children: [
+          color: tokens.offlineAccent.withValues(alpha: 0.14),
-            Icon(Icons.wifi_off, color: theme.colorScheme.error),
+          borderRadius: BorderRadius.circular(16),
-            const SizedBox(width: 8),
+          border: Border.all(
-            Expanded(child: Text(error)),
+            color: tokens.offlineAccent.withValues(alpha: 0.4),
-            TextButton(
+          ),
-              onPressed: () => context.read<EstadoRadio>().cargarPopulares(),
+        ),
-              child: Text(l10n.retryAction),
+        child: Padding(
-            ),
+          padding: const EdgeInsets.symmetric(horizontal: 15, vertical: 13),
-          ],
+          child: Row(
+            children: [
+              Icon(Icons.wifi_off, size: 22, color: tokens.offlineAccent),
+              const SizedBox(width: 11),
+              Expanded(
+                child: Column(
+                  crossAxisAlignment: CrossAxisAlignment.start,
+                  mainAxisSize: MainAxisSize.min,
+                  children: [
+                    Text(
+                      l10n.offlineBannerTitle,
+                      style: const TextStyle(
+                        fontSize: 13.5,
+                        fontWeight: FontWeight.w800,
+                      ),
+                    ),
+                    Text(
+                      error,
+                      style: TextStyle(
+                        fontSize: 11.5,
+                        color: theme.colorScheme.onSurface.withValues(
+                          alpha: 0.65,
+                        ),
+                      ),
+                    ),
+                  ],
+                ),
+              ),
+              const SizedBox(width: 8),
+              TextButton(
+                style: TextButton.styleFrom(
+                  backgroundColor: Colors.white.withValues(alpha: 0.1),
+                  foregroundColor: theme.colorScheme.onSurface,
+                  padding: const EdgeInsets.symmetric(
+                    horizontal: 12,
+                    vertical: 7,
+                  ),
+                  shape: RoundedRectangleBorder(
+                    borderRadius: BorderRadius.circular(10),
+                  ),
+                  textStyle: const TextStyle(
+                    fontSize: 12,
+                    fontWeight: FontWeight.w800,
+                  ),
+                ),
+                onPressed: () => context.read<EstadoRadio>().cargarPopulares(),
+                child: Text(l10n.retryAction),
+              ),
+            ],
+          ),
         ),
       ),
     );

test/pantallas/pantalla_buscar_test.dart

@@ -9,6 +9,7 @@ import 'package:pluriwave/estado/estado_radio.dart';
 import 'package:pluriwave/l10n/gen/app_localizations.dart';
 import 'package:pluriwave/pantallas/pantalla_buscar.dart';
 import 'package:pluriwave/pantallas/pantalla_favoritos.dart';
+import 'package:pluriwave/tema/pluriwave_theme.dart';
 import 'package:pluriwave/widgets/tarjeta_emisora.dart';
 import 'package:provider/provider.dart';
 import 'package:shared_preferences/shared_preferences.dart';
@@ -25,33 +26,30 @@ void main() {
   });
 
   group('Buscar — landing state (empty query shows discovery content)', () {
-    testWidgets(
+    testWidgets('consulta vacia muestra cerca de vos, generos y tendencias; '
-      'consulta vacia muestra cerca de vos, generos y tendencias; '
+        'el grid de resultados de busqueda no aparece', (tester) async {
-      'el grid de resultados de busqueda no aparece',
+      _setLargeSurfaceSize(tester);
-      (tester) async {
+      final estado = _crearEstado(
-        _setLargeSurfaceSize(tester);
+        radio: FakeServicioRadio(
-        final estado = _crearEstado(
+          populares: [emisoraDemo(uuid: 'pop-1', nombre: 'Populares Uno')],
-          radio: FakeServicioRadio(
+          tendencias: [emisoraDemo(uuid: 'tr-1', nombre: 'Tendencia Uno')],
-            populares: [emisoraDemo(uuid: 'pop-1', nombre: 'Populares Uno')],
+        ),
-            tendencias: [emisoraDemo(uuid: 'tr-1', nombre: 'Tendencia Uno')],
+      );
-          ),
+      addTearDown(estado.dispose);
-        );
+      await tester.runAsync(estado.inicializar);
-        addTearDown(estado.dispose);
-        await tester.runAsync(estado.inicializar);
 
-        await tester.pumpWidget(_conProviders(estado, _testApp()));
+      await tester.pumpWidget(_conProviders(estado, _testApp()));
-        await _pumpStableFrame(tester);
+      await _pumpStableFrame(tester);
 
-        final l10n = _l10nDe(tester);
+      final l10n = _l10nDe(tester);
-        expect(find.text(l10n.nearYou), findsOneWidget);
+      expect(find.text(l10n.nearYou), findsOneWidget);
-        expect(find.text(l10n.liveRadar), findsOneWidget);
+      expect(find.text(l10n.liveRadar), findsOneWidget);
-        expect(find.text(l10n.genresTitle), findsOneWidget);
+      expect(find.text(l10n.genresTitle), findsOneWidget);
-        expect(find.text('Populares Uno'), findsOneWidget);
+      expect(find.text('Populares Uno'), findsOneWidget);
-        // The search-results empty state must NOT show — this is the
+      // The search-results empty state must NOT show — this is the
-        // landing state, not "you searched and got nothing".
+      // landing state, not "you searched and got nothing".
-        expect(find.text(l10n.searchEmptyTitle), findsNothing);
+      expect(find.text(l10n.searchEmptyTitle), findsNothing);
-      },
+    });
-    );
 
     testWidgets(
       'escribir una consulta reemplaza el contenido de descubrimiento por '
@@ -110,38 +108,37 @@ void main() {
       },
     );
 
-    testWidgets(
+    testWidgets('quitar un pill vuelve a buscar sin ese filtro', (
-      'quitar un pill vuelve a buscar sin ese filtro',
+      tester,
-      (tester) async {
+    ) async {
-        _setLargeSurfaceSize(tester);
+      _setLargeSurfaceSize(tester);
-        final estado = _crearEstado(
+      final estado = _crearEstado(
-          radio: FakeServicioRadio(
+        radio: FakeServicioRadio(
-            busqueda: [emisoraDemo(uuid: 'es-1', nombre: 'Radio Espana')],
+          busqueda: [emisoraDemo(uuid: 'es-1', nombre: 'Radio Espana')],
-          ),
+        ),
-        );
+      );
-        addTearDown(estado.dispose);
+      addTearDown(estado.dispose);
-        await tester.runAsync(estado.inicializar);
+      await tester.runAsync(estado.inicializar);
 
-        await tester.pumpWidget(_conProviders(estado, _testApp()));
+      await tester.pumpWidget(_conProviders(estado, _testApp()));
-        await _pumpStableFrame(tester);
+      await _pumpStableFrame(tester);
 
-        final l10n = _l10nDe(tester);
+      final l10n = _l10nDe(tester);
-        await _abrirYSeleccionarPais(tester, l10n.countrySpain);
+      await _abrirYSeleccionarPais(tester, l10n.countrySpain);
-        await _pumpStableFrame(tester);
+      await _pumpStableFrame(tester);
-        expect(find.text(l10n.countrySpain), findsOneWidget);
+      expect(find.text(l10n.countrySpain), findsOneWidget);
 
-        final pillPais = find.ancestor(
+      final pillPais = find.ancestor(
-          of: find.text(l10n.countrySpain),
+        of: find.text(l10n.countrySpain),
-          matching: find.byType(Chip),
+        matching: find.byType(Chip),
-        );
+      );
-        await tester.tap(
+      await tester.tap(
-          find.descendant(of: pillPais, matching: find.byIcon(Icons.close)),
+        find.descendant(of: pillPais, matching: find.byIcon(Icons.close)),
-        );
+      );
-        await _pumpStableFrame(tester);
+      await _pumpStableFrame(tester);
 
-        expect(find.text(l10n.countrySpain), findsNothing);
+      expect(find.text(l10n.countrySpain), findsNothing);
-      },
+    });
-    );
 
     testWidgets(
       'dos filtros activos y cero resultados ofrecen quitar ambos de una '
@@ -207,128 +204,150 @@ void main() {
       },
     );
 
-    testWidgets(
+    testWidgets('elegir un criterio reordena la pagina actual sin una nueva '
-      'elegir un criterio reordena la pagina actual sin una nueva '
+        'solicitud de red con parametro order', (tester) async {
-      'solicitud de red con parametro order',
+      _setLargeSurfaceSize(tester);
-      (tester) async {
+      final radio = FakeServicioRadio(
-        _setLargeSurfaceSize(tester);
+        busqueda: [
-        final radio = FakeServicioRadio(
+          emisoraDemo(
-          busqueda: [
+            uuid: 'alta',
-            emisoraDemo(uuid: 'alta', nombre: 'Estacion Alta')
+            nombre: 'Estacion Alta',
-                .copyWith(bitrate: 320, votes: 1),
+          ).copyWith(bitrate: 320, votes: 1),
-            emisoraDemo(uuid: 'popular', nombre: 'Estacion Popular')
+          emisoraDemo(
-                .copyWith(bitrate: 64, votes: 900),
+            uuid: 'popular',
-          ],
+            nombre: 'Estacion Popular',
-        );
+          ).copyWith(bitrate: 64, votes: 900),
-        final estado = _crearEstado(radio: radio);
+        ],
-        addTearDown(estado.dispose);
+      );
-        await tester.runAsync(estado.inicializar);
+      final estado = _crearEstado(radio: radio);
+      addTearDown(estado.dispose);
+      await tester.runAsync(estado.inicializar);
 
-        await tester.pumpWidget(_conProviders(estado, _testApp()));
+      await tester.pumpWidget(_conProviders(estado, _testApp()));
-        await _pumpStableFrame(tester);
+      await _pumpStableFrame(tester);
-        await tester.enterText(find.byType(SearchBar), 'estacion');
+      await tester.enterText(find.byType(SearchBar), 'estacion');
-        await tester.testTextInput.receiveAction(TextInputAction.done);
+      await tester.testTextInput.receiveAction(TextInputAction.done);
-        await _pumpStableFrame(tester);
+      await _pumpStableFrame(tester);
 
-        // Default global ordering is OrdenEmisoras.calidad (bitrate desc):
+      // Default global ordering is OrdenEmisoras.calidad (bitrate desc):
-        // "Estacion Alta" (320 kbps) must render above "Estacion Popular".
+      // "Estacion Alta" (320 kbps) must render above "Estacion Popular".
-        final yAltaAntes = tester.getTopLeft(find.text('Estacion Alta')).dy;
+      final yAltaAntes = tester.getTopLeft(find.text('Estacion Alta')).dy;
-        final yPopularAntes = tester.getTopLeft(
+      final yPopularAntes = tester.getTopLeft(find.text('Estacion Popular')).dy;
-          find.text('Estacion Popular'),
+      expect(yAltaAntes, lessThan(yPopularAntes));
-        ).dy;
-        expect(yAltaAntes, lessThan(yPopularAntes));
 
-        final llamadasAntes = radio.buscarCalls;
+      final llamadasAntes = radio.buscarCalls;
 
-        final l10n = _l10nDe(tester);
+      final l10n = _l10nDe(tester);
-        await tester.tap(find.byIcon(Icons.swap_vert_rounded));
+      await tester.tap(find.byIcon(Icons.swap_vert_rounded));
-        await tester.pumpAndSettle();
+      await tester.pumpAndSettle();
-        await tester.tap(find.text(l10n.stationOrderByPopularity));
+      await tester.tap(find.text(l10n.stationOrderByPopularity));
-        await _pumpStableFrame(tester);
+      await _pumpStableFrame(tester);
 
-        expect(
+      expect(
-          radio.buscarCalls,
+        radio.buscarCalls,
-          llamadasAntes,
+        llamadasAntes,
-          reason: 'sorting must not trigger a new /json request',
+        reason: 'sorting must not trigger a new /json request',
-        );
+      );
 
-        final yAltaDespues = tester.getTopLeft(find.text('Estacion Alta')).dy;
+      final yAltaDespues = tester.getTopLeft(find.text('Estacion Alta')).dy;
-        final yPopularDespues = tester.getTopLeft(
+      final yPopularDespues =
-          find.text('Estacion Popular'),
+          tester.getTopLeft(find.text('Estacion Popular')).dy;
-        ).dy;
+      expect(yPopularDespues, lessThan(yAltaDespues));
-        expect(yPopularDespues, lessThan(yAltaDespues));
+    });
-      },
-    );
   });
 
   group('Buscar — contenido relocalizado desde PantallaInicio (WU6 6.5)', () {
-    testWidgets(
+    testWidgets('el grid de descubrimiento muestra custom + populares; tocar '
-      'el grid de descubrimiento muestra custom + populares; tocar '
+        'reproduce via EstadoRadio y el boton de favorito usa el flujo '
-      'reproduce via EstadoRadio y el boton de favorito usa el flujo '
+        'existente', (tester) async {
-      'existente',
+      _setLargeSurfaceSize(tester);
-      (tester) async {
+      final audio = FakeServicioAudio();
-        _setLargeSurfaceSize(tester);
+      final favoritos = FakeServicioFavoritos();
-        final audio = FakeServicioAudio();
+      final radio = FakeServicioRadio();
-        final favoritos = FakeServicioFavoritos();
+      final custom = emisoraDemo(uuid: 'custom-1', nombre: 'Custom Uno');
-        final radio = FakeServicioRadio();
+      final archivo = await _crearArchivoCustom([custom]);
-        final custom = emisoraDemo(uuid: 'custom-1', nombre: 'Custom Uno');
+      final estado = _crearEstado(
-        final archivo = await _crearArchivoCustom([custom]);
+        audio: audio,
-        final estado = _crearEstado(
+        favoritos: favoritos,
-          audio: audio,
+        radio: radio,
-          favoritos: favoritos,
+        resolverArchivoCustom: () async => archivo,
-          radio: radio,
+      );
-          resolverArchivoCustom: () async => archivo,
+      addTearDown(estado.dispose);
-        );
+      await tester.runAsync(estado.inicializar);
-        addTearDown(estado.dispose);
-        await tester.runAsync(estado.inicializar);
 
-        await tester.pumpWidget(_conProviders(estado, _testApp()));
+      await tester.pumpWidget(_conProviders(estado, _testApp()));
-        await _pumpStableFrame(tester);
+      await _pumpStableFrame(tester);
 
-        expect(find.text('Custom Uno'), findsOneWidget);
+      expect(find.text('Custom Uno'), findsOneWidget);
 
-        await tester.tap(find.text('Custom Uno'));
+      await tester.tap(find.text('Custom Uno'));
-        await _pumpStableFrame(tester);
+      await _pumpStableFrame(tester);
-        expect(
+      expect(
-          audio.emisorasReproducidas.map((e) => e.uuid),
+        audio.emisorasReproducidas.map((e) => e.uuid),
-          contains('custom-1'),
+        contains('custom-1'),
-        );
+      );
-        expect(radio.ultimoUuidClick, 'custom-1');
+      expect(radio.ultimoUuidClick, 'custom-1');
 
-        final tarjetaCustom = find.ancestor(
+      final tarjetaCustom = find.ancestor(
-          of: find.text('Custom Uno'),
+        of: find.text('Custom Uno'),
-          matching: find.byType(TarjetaEmisora),
+        matching: find.byType(TarjetaEmisora),
-        );
+      );
-        final botonFavorito =
+      final botonFavorito =
-            find
+          find
-                .descendant(of: tarjetaCustom, matching: find.byType(InkWell))
+              .descendant(of: tarjetaCustom, matching: find.byType(InkWell))
-                .last;
+              .last;
-        expect(botonFavorito, findsOneWidget);
+      expect(botonFavorito, findsOneWidget);
 
-        await tester.ensureVisible(botonFavorito);
+      await tester.ensureVisible(botonFavorito);
-        await _pumpStableFrame(tester);
+      await _pumpStableFrame(tester);
-        await tester.tap(botonFavorito);
+      await tester.tap(botonFavorito);
-        await _pumpStableFrame(tester);
+      await _pumpStableFrame(tester);
 
-        expect(favoritos.toggleCalls, 1);
+      expect(favoritos.toggleCalls, 1);
-        expect(await favoritos.esFavorito(custom.uuid), isTrue);
+      expect(await favoritos.esFavorito(custom.uuid), isTrue);
-      },
+    });
-    );
+
+    testWidgets('permite reintentar manualmente tras fallo inicial agotado', (
+      tester,
+    ) async {
+      _setLargeSurfaceSize(tester);
+      final radio = FakeServicioRadio(
+        erroresPopularesPorLlamada: [Exception('sin red')],
+        popularesPorLlamada: [
+          const [],
+          [emisoraDemo(uuid: 'api-1', nombre: 'API Uno')],
+        ],
+        tendenciasPorLlamada: [
+          const [],
+          [emisoraDemo(uuid: 'trend-1', nombre: 'Trend Uno')],
+        ],
+      );
+      final estado = _crearEstado(radio: radio);
+      addTearDown(estado.dispose);
+      await tester.runAsync(estado.inicializar);
+
+      await tester.pumpWidget(_conProviders(estado, _testApp()));
+      await _pumpStableFrame(tester);
+
+      expect(find.text('Sin conexión a la API de radio'), findsOneWidget);
+      final l10n = _l10nDe(tester);
+      expect(find.text(l10n.retryAction), findsOneWidget);
+
+      await tester.tap(find.text(l10n.retryAction));
+      await _pumpStableFrame(tester);
+
+      expect(radio.obtenerPopularesCalls, 2);
+      expect(find.text('Sin conexión a la API de radio'), findsNothing);
+      expect(find.text('API Uno'), findsOneWidget);
+    });
 
     testWidgets(
-      'permite reintentar manualmente tras fallo inicial agotado',
+      'visual fidelity (audit 13.1, proto t4 line 641): banner sin conexion '
+      'usa offlineAccent, no colorScheme.error',
       (tester) async {
         _setLargeSurfaceSize(tester);
         final radio = FakeServicioRadio(
           erroresPopularesPorLlamada: [Exception('sin red')],
-          popularesPorLlamada: [
-            const [],
-            [emisoraDemo(uuid: 'api-1', nombre: 'API Uno')],
-          ],
-          tendenciasPorLlamada: [
-            const [],
-            [emisoraDemo(uuid: 'trend-1', nombre: 'Trend Uno')],
-          ],
         );
         final estado = _crearEstado(radio: radio);
         addTearDown(estado.dispose);
@@ -337,16 +356,37 @@ void main() {
         await tester.pumpWidget(_conProviders(estado, _testApp()));
         await _pumpStableFrame(tester);
 
-        expect(find.text('Sin conexión a la API de radio'), findsOneWidget);
+        final banner = find.byKey(const ValueKey('offline-banner'));
+        expect(banner, findsOneWidget);
+        final contexto = tester.element(banner);
+        final tokens = contexto.pluriTokens;
+        final errorColor = Theme.of(contexto).colorScheme.error;
+
+        final caja = tester.widget<DecoratedBox>(banner);
+        final decoracion = caja.decoration as BoxDecoration;
+        expect(
+          decoracion.color,
+          tokens.offlineAccent.withValues(alpha: 0.14),
+          reason:
+              'prototype t4 line 641: rgba(207,102,121,.14) — this app '
+              'consolidates on the offlineAccent token (#E8879A)',
+        );
+        expect(decoracion.color, isNot(errorColor));
+        expect(
+          decoracion.borderRadius,
+          BorderRadius.circular(16),
+          reason: 'prototype t4 line 641: border-radius:16px',
+        );
+
+        final icono = tester.widget<Icon>(
+          find.descendant(of: banner, matching: find.byIcon(Icons.wifi_off)),
+        );
+        expect(icono.color, tokens.offlineAccent);
+        expect(icono.color, isNot(errorColor));
+
         final l10n = _l10nDe(tester);
+        expect(find.text(l10n.offlineBannerTitle), findsOneWidget);
         expect(find.text(l10n.retryAction), findsOneWidget);
-
-        await tester.tap(find.text(l10n.retryAction));
-        await _pumpStableFrame(tester);
-
-        expect(radio.obtenerPopularesCalls, 2);
-        expect(find.text('Sin conexión a la API de radio'), findsNothing);
-        expect(find.text('API Uno'), findsOneWidget);
       },
     );