Fix page detection and add floating progress popup

✨ Improvements:
- Enhanced page detection to support 'X pages' pattern
- Added comprehensive logging for debugging
- Implemented floating progress popup on page
- Added show/hide progress message handlers
- Better error handling and logging for image extraction
- Fixed popup to display real-time progress

🐛 Fixed:
- Page detection now works for both 'Showing X of Y images' and 'X pages' patterns
- Downloads should now work correctly with proper page iteration
- Added visible feedback via floating popup

🔍 Debugging:
- Added console logs for page detection
- Logs show total pages found and images extracted
- Each page is logged during processing

popup.js

@@ -70,11 +70,30 @@ document.addEventListener('DOMContentLoaded', async () => {
 
     showProgress(0, selectedMangas.length, 'Iniciando descargas...');
 
+    // Mostrar popup flotante en la página
+    chrome.tabs.sendMessage(tab.id, {
+      action: 'showProgress',
+      current: 0,
+      total: selectedMangas.length,
+      title: 'Preparando...',
+      status: 'Iniciando descargas...'
+    });
+
     try {
       // Descargar cada manga secuencialmente
       for (let i = 0; i < selectedMangas.length; i++) {
         const manga = selectedMangas[i];
-        showProgress(i + 1, selectedMangas.length, `Descargando: ${manga.title.substring(0, 30)}...`);
+        const title = manga.title ? manga.title.substring(0, 50) : 'Manga sin título';
+        showProgress(i + 1, selectedMangas.length, `Descargando: ${title}...`);
+
+        // Actualizar popup flotante
+        chrome.tabs.sendMessage(tab.id, {
+          action: 'showProgress',
+          current: i,
+          total: selectedMangas.length,
+          title: title,
+          status: `Descargando manga ${i + 1} de ${selectedMangas.length}...`
+        });
 
         try {
           // Obtener URLs de imágenes
@@ -98,6 +117,11 @@ document.addEventListener('DOMContentLoaded', async () => {
       showProgress(selectedMangas.length, selectedMangas.length, '¡Completado!');
       statusElement.className = 'status success';
 
+      // Ocultar popup flotante
+      chrome.tabs.sendMessage(tab.id, {
+        action: 'hideProgress'
+      });
+
       // Limpiar selección después de 3 segundos
       setTimeout(() => {
         chrome.tabs.sendMessage(tab.id, { action: 'clearSelection' }, async () => {