feat(ui): add premium PluriWave redesign

lib/pantallas/pantalla_favoritos.dart

@@ -1,9 +1,12 @@
-import 'package:flutter/material.dart';
+import 'package:flutter/material.dart';
 import 'package:provider/provider.dart';
+
 import '../estado/estado_radio.dart';
+import '../tema/pluriwave_theme.dart';
+import '../widgets/pluri_glass_surface.dart';
+import '../widgets/pluri_icon.dart';
 import '../widgets/tarjeta_emisora.dart';
 
-/// Pantalla de emisoras favoritas con reordenado y swipe-to-delete.
 class PantallaFavoritos extends StatelessWidget {
   const PantallaFavoritos({super.key});
 
@@ -15,26 +18,26 @@ class PantallaFavoritos extends StatelessWidget {
 
     if (favoritos.isEmpty) {
       return Center(
-        child: Column(
-          mainAxisSize: MainAxisSize.min,
-          children: [
-            Icon(Icons.favorite_border, size: 72, color: theme.colorScheme.outlineVariant),
-            const SizedBox(height: 16),
-            Text('Sin favoritos aún', style: theme.textTheme.titleMedium),
-            const SizedBox(height: 8),
-            Text(
-              'Toca ♥ en cualquier emisora para guardarla',
-              style: theme.textTheme.bodyMedium?.copyWith(
-                color: theme.colorScheme.onSurfaceVariant,
+        child: PluriGlassSurface(
+          child: Column(
+            mainAxisSize: MainAxisSize.min,
+            children: [
+              const PluriIcon(glyph: PluriIconGlyph.favorites, variant: PluriIconVariant.activeGlow, size: 52),
+              const SizedBox(height: 16),
+              Text('Sin favoritos aún', style: theme.textTheme.titleMedium),
+              const SizedBox(height: 8),
+              Text(
+                'Tocá ♥ en cualquier emisora para guardarla',
+                style: theme.textTheme.bodyMedium?.copyWith(color: theme.colorScheme.onSurfaceVariant),
               ),
-            ),
-          ],
+            ],
+          ),
         ),
       );
     }
 
     return ReorderableListView.builder(
-      padding: const EdgeInsets.all(8),
+      padding: const EdgeInsets.all(12),
       onReorder: (oldIndex, newIndex) async {
         if (newIndex > oldIndex) newIndex--;
         final emisora = favoritos[oldIndex];
@@ -44,29 +47,39 @@ class PantallaFavoritos extends StatelessWidget {
       itemCount: favoritos.length,
       itemBuilder: (context, i) {
         final emisora = favoritos[i];
-        return Dismissible(
-          key: Key(emisora.uuid),
-          direction: DismissDirection.endToStart,
-          background: Container(
-            color: theme.colorScheme.error,
-            alignment: Alignment.centerRight,
-            padding: const EdgeInsets.only(right: 16),
-            child: Icon(Icons.delete, color: theme.colorScheme.onError),
-          ),
-          onDismissed: (_) async {
-            await estado.favoritos.eliminar(emisora.uuid);
-            await estado.cargarFavoritos();
-            if (context.mounted) {
-              ScaffoldMessenger.of(context).showSnackBar(
-                SnackBar(content: Text('${emisora.nombre} eliminada de favoritos')),
-              );
-            }
-          },
-          child: TarjetaEmisora(
-            key: Key(emisora.uuid),
-            emisora: emisora,
-            esCompacta: true,
-            onTap: () => estado.reproducir(emisora),
+        return Padding(
+          key: ValueKey('favorito-pad-${emisora.uuid}'),
+          padding: const EdgeInsets.symmetric(vertical: 4),
+          child: PluriGlassSurface(
+            padding: const EdgeInsets.symmetric(horizontal: 8, vertical: 6),
+            child: Row(
+              children: [
+                const Icon(Icons.drag_indicator_rounded),
+                const SizedBox(width: 6),
+                Expanded(
+                  child: TarjetaEmisora(
+                    key: Key(emisora.uuid),
+                    emisora: emisora,
+                    esCompacta: true,
+                    onTap: () => estado.reproducir(emisora),
+                  ),
+                ),
+                IconButton(
+                  tooltip: 'Eliminar de favoritos',
+                  icon: const Icon(Icons.delete_outline_rounded),
+                  onPressed: () async {
+                    await estado.favoritos.eliminar(emisora.uuid);
+                    await estado.cargarFavoritos();
+                    if (context.mounted) {
+                      ScaffoldMessenger.of(context).showSnackBar(
+                        SnackBar(content: Text('${emisora.nombre} eliminada de favoritos')),
+                      );
+                    }
+                  },
+                ),
+              ],
+              ),
+            ),
           ),
         );
       },