feat(mvp): PluriWave Fase 1 — estructura completa de la app

- Modelo Emisora: campos completos Radio Browser API (fromApi + fromMap)
- ServicioRadio: cliente Radio Browser API (populares, tendencias, buscar por nombre/país/idioma/tag)
- ServicioAudio: just_audio + audio_service wrapper (play/pause/stop/toggle, fade, background handler)
- ServicioTimer: countdown con fade out gradual (15/30/60/90 min)
- ServicioFavoritos: actualizado a v2 con campos codec/bitrate/votes/clickcount
- EstadoRadio: ChangeNotifier global con Provider
- PantallaInicio: grid emisoras populares, chips género, shimmer loading, pull-to-refresh
- PantallaBuscar: SearchBar + filtros país/idioma, lista resultados
- PantallaFavoritos: ReorderableListView + swipe-to-delete (Dismissible)
- TarjetaEmisora: card + modo compacto ListTile, cached_network_image, shimmer fallback
- MiniReproductor: barra inferior persistente con stream de estado
- app.dart: MaterialApp + Provider + NavigationBar + timer dialog
- main.dart: punto de entrada limpio
- AndroidManifest.xml: permisos INTERNET + FOREGROUND_SERVICE + audio_service receivers

android/app/src/main/AndroidManifest.xml

@@ -1,6 +1,12 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android">
+    <!-- Permisos requeridos para streaming de audio -->
+    <uses-permission android:name="android.permission.INTERNET"/>
+    <uses-permission android:name="android.permission.FOREGROUND_SERVICE"/>
+    <uses-permission android:name="android.permission.FOREGROUND_SERVICE_MEDIA_PLAYBACK"/>
+    <uses-permission android:name="android.permission.WAKE_LOCK"/>
+
     <application
-        android:label="pluriwave"
+        android:label="PluriWave"
         android:name="${applicationName}"
         android:icon="@mipmap/ic_launcher">
         <activity
@@ -12,10 +18,6 @@
             android:configChanges="orientation|keyboardHidden|keyboard|screenSize|smallestScreenSize|locale|layoutDirection|fontScale|screenLayout|density|uiMode"
             android:hardwareAccelerated="true"
             android:windowSoftInputMode="adjustResize">
-            <!-- Specifies an Android theme to apply to this Activity as soon as
-                 the Android process has started. This theme is visible to the user
-                 while the Flutter UI initializes. After that, this theme continues
-                 to determine the Window background behind the Flutter UI. -->
             <meta-data
               android:name="io.flutter.embedding.android.NormalTheme"
               android:resource="@style/NormalTheme"
@@ -25,17 +27,30 @@
                 <category android:name="android.intent.category.LAUNCHER"/>
             </intent-filter>
         </activity>
-        <!-- Don't delete the meta-data below.
-             This is used by the Flutter tool to generate GeneratedPluginRegistrant.java -->
+
+        <!-- Servicio de audio en background (audio_service) -->
+        <service
+            android:name="com.ryanheise.audioservice.AudioService"
+            android:foregroundServiceType="mediaPlayback"
+            android:exported="true">
+            <intent-filter>
+                <action android:name="android.media.browse.MediaBrowserService"/>
+            </intent-filter>
+        </service>
+
+        <!-- Receptor de controles de media (auriculares, notificación) -->
+        <receiver
+            android:name="com.ryanheise.audioservice.MediaButtonReceiver"
+            android:exported="true">
+            <intent-filter>
+                <action android:name="android.intent.action.MEDIA_BUTTON"/>
+            </intent-filter>
+        </receiver>
+
         <meta-data
             android:name="flutterEmbedding"
             android:value="2" />
     </application>
-    <!-- Required to query activities that can process text, see:
-         https://developer.android.com/training/package-visibility and
-         https://developer.android.com/reference/android/content/Intent#ACTION_PROCESS_TEXT.
-
-         In particular, this is used by the Flutter engine in io.flutter.plugin.text.ProcessTextPlugin. -->
     <queries>
         <intent>
             <action android:name="android.intent.action.PROCESS_TEXT"/>