feat(ui): add generated premium assets

lib/widgets/pluri_icon.dart

@@ -24,21 +24,34 @@ class PluriIcon extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
     final tokens = context.pluriTokens;
-    final icon = Icon(
-      _resolveData(),
-      size: size,
-      color: _resolveColor(context, tokens),
-    );
+    final asset = _resolveAsset();
+    final resolvedColor = _resolveColor(context, tokens);
+    final icon = asset == null
+        ? Icon(_resolveData(), size: size, color: resolvedColor)
+        : Opacity(
+            opacity: variant == PluriIconVariant.outline ? 0.78 : 1,
+            child: Image.asset(
+              asset,
+              width: size,
+              height: size,
+              fit: BoxFit.contain,
+              errorBuilder: (_, __, ___) => Icon(
+                _resolveData(),
+                size: size,
+                color: resolvedColor,
+              ),
+            ),
+          );
     final child = variant == PluriIconVariant.activeGlow
         ? Container(
-            width: size + 12,
-            height: size + 12,
+            width: size + 14,
+            height: size + 14,
             decoration: BoxDecoration(
               shape: BoxShape.circle,
               boxShadow: [
                 BoxShadow(
                   color: tokens.glowColor,
-                  blurRadius: 14,
+                  blurRadius: 18,
                   spreadRadius: 1,
                 ),
               ],
@@ -55,6 +68,18 @@ class PluriIcon extends StatelessWidget {
     );
   }
 
+
+
+  String? _resolveAsset() {
+    return switch (glyph) {
+      PluriIconGlyph.home => 'assets/icons/pluri_home.png',
+      PluriIconGlyph.search => 'assets/icons/pluri_search.png',
+      PluriIconGlyph.favorites => 'assets/icons/pluri_favorites.png',
+      PluriIconGlyph.player => 'assets/icons/pluri_player.png',
+      PluriIconGlyph.settings => 'assets/icons/pluri_settings.png',
+    };
+  }
+
   Color _resolveColor(BuildContext context, PluriWaveTokens tokens) {
     if (variant == PluriIconVariant.activeGlow) return tokens.electricMagenta;
     if (variant == PluriIconVariant.filled) return Theme.of(context).colorScheme.onSurface;

lib/widgets/pluri_premium_widgets.dart

@@ -38,6 +38,19 @@ class PluriScreenHeader extends StatelessWidget {
               top: -42,
               child: _Orb(color: t.electricMagenta.withValues(alpha: 0.38), size: 128),
             ),
+            Positioned(
+              right: 10,
+              top: 10,
+              child: Opacity(
+                opacity: 0.18,
+                child: Image.asset(
+                  'assets/icons/pluriwave_app_mark.png',
+                  width: 120,
+                  height: 120,
+                  errorBuilder: (_, __, ___) => const SizedBox.shrink(),
+                ),
+              ),
+            ),
             Positioned(
               right: 44,
               bottom: -54,

lib/widgets/tarjeta_emisora.dart

@@ -293,25 +293,48 @@ class _TarjetaEmisoraState extends State<TarjetaEmisora> {
   }
 
   Widget _iconoFallback(double size) {
-    final t = context.pluriTokens;
-    return DecoratedBox(
-      decoration: BoxDecoration(
-        gradient: LinearGradient(
-          begin: Alignment.topLeft,
-          end: Alignment.bottomRight,
-          colors: [t.deepViolet, t.electricMagenta.withValues(alpha: 0.8)],
+    final art = _fallbackArtFor(widget.emisora.uuid);
+    return Stack(
+      fit: StackFit.expand,
+      children: [
+        Image.asset(
+          art,
+          fit: BoxFit.cover,
+          errorBuilder: (_, __, ___) => DecoratedBox(
+            decoration: BoxDecoration(
+              gradient: LinearGradient(
+                begin: Alignment.topLeft,
+                end: Alignment.bottomRight,
+                colors: [
+                  context.pluriTokens.deepViolet,
+                  context.pluriTokens.electricMagenta.withValues(alpha: 0.8),
+                ],
+              ),
+            ),
+          ),
         ),
-      ),
-      child: Center(
-        child: PluriIcon(
-          glyph: PluriIconGlyph.player,
-          variant: PluriIconVariant.filled,
-          size: size,
-          semanticLabel: 'Icono de emisora',
+        Center(
+          child: PluriIcon(
+            glyph: PluriIconGlyph.player,
+            variant: PluriIconVariant.activeGlow,
+            size: size,
+            semanticLabel: 'Icono de emisora',
+          ),
         ),
-      ),
+      ],
     );
   }
+
+  String _fallbackArtFor(String seed) {
+    const arts = [
+      'assets/images/station_art_aurora.png',
+      'assets/images/station_art_cosmic.png',
+      'assets/images/station_art_pulse.png',
+      'assets/images/station_art_nova.png',
+    ];
+    final index = seed.codeUnits.fold<int>(0, (a, b) => a + b) % arts.length;
+    return arts[index];
+  }
 }
 
 class _LiveBadge extends StatelessWidget {