Add message listener logging

🔍 Now logs ALL messages received from popup.js:
- Logs when any message is received (with action type)
- Logs showProgress messages specifically
- Logs getSelectedMangas requests
- Logs getImageUrls requests
- Logs extractAllMangas requests
- Logs hideProgress requests

This will tell us if popup.js is actually sending messages to content script

content.js

@@ -135,6 +135,8 @@
 
   // Escuchar mensajes del popup
   chrome.runtime.onMessage.addListener((request, sender, sendResponse) => {
+    console.log('📨 MENSAJE RECIBIDO:', request.action, request);
+
     if (request.action === 'getSelectedMangas') {
       // Devolver objetos completos en lugar de solo IDs
       const selectedObjects = [];
@@ -144,25 +146,32 @@
           selectedObjects.push(mangaObj);
         }
       });
+      console.log('📤 Enviando mangas seleccionados:', selectedObjects.length);
       sendResponse({ mangas: selectedObjects });
     } else if (request.action === 'clearSelection') {
       selectedMangas.clear();
       updateSelectedCount();
       sendResponse({ success: true });
     } else if (request.action === 'getImageUrls') {
+      console.log('📸 Solicitando URLs de imágenes para:', request.manga.title);
       getImageUrlsForManga(request.manga)
         .then(imageUrls => sendResponse({ imageUrls }))
         .catch(error => sendResponse({ error: error.message }));
       return true;
     } else if (request.action === 'extractAllMangas') {
       const allMangas = extractAllMangasFromPage();
+      console.log('📤 Enviando todos los mangas:', allMangas.length);
       sendResponse({ mangas: allMangas });
     } else if (request.action === 'showProgress') {
+      console.log('📊 Mostrando progreso:', request);
       updateProgress(request.current, request.total, request.title, request.status);
       sendResponse({ success: true });
     } else if (request.action === 'hideProgress') {
+      console.log('🙈 Ocultando progreso');
       hideProgress();
       sendResponse({ success: true });
+    } else {
+      console.log('❓ Acción desconocida:', request.action);
     }
     return true;
   });
@@ -491,6 +500,13 @@
       addCheckboxes();
       addSelectAllButton();
     }, 1000);
+
+    // TEST: Crear popup de prueba para verificar que funciona
+    console.log('🧪 Creando popup de prueba...');
+    setTimeout(() => {
+      updateProgress(1, 5, 'Prueba', 'Verificando si el popup funciona');
+      console.log('✅ Popup de prueba enviado');
+    }, 2000);
   }
 
   if (document.readyState === 'loading') {