Fix metadata storage for selected manga

- Added mangaMetadata Map to store full manga objects with title, token, url, baseUrl
- Modified getSelectedMangas to return full manga objects instead of just IDs
- Fixed substring error when downloading selected manga
- Enhanced checkbox creation to save metadata during initialization
- Improved logging for selection/deselection events

Resolves: Error: Cannot read properties of undefined (reading 'substring')

content.js

@@ -6,12 +6,21 @@
 
   let selectedMangas = new Set();
   let checkboxesAdded = false;
+  // Map para almacenar metadatos completos de manga por ID
+  let mangaMetadata = new Map();
 
   // Escuchar mensajes del popup
   chrome.runtime.onMessage.addListener((request, sender, sendResponse) => {
     if (request.action === 'getSelectedMangas') {
-      const selected = Array.from(selectedMangas);
-      sendResponse({ mangas: selected });
+      // Devolver objetos completos en lugar de solo IDs
+      const selectedObjects = [];
+      selectedMangas.forEach(id => {
+        const mangaObj = mangaMetadata.get(id);
+        if (mangaObj) {
+          selectedObjects.push(mangaObj);
+        }
+      });
+      sendResponse({ mangas: selectedObjects });
     } else if (request.action === 'clearSelection') {
       selectedMangas.clear();
       updateSelectedCount();
@@ -185,7 +194,24 @@
         return;
       }
 
-      console.log(`  📝 [${index}] Creando checkbox para manga ID: ${match ? match[1] : 'N/A'}`);
+      const mangaId = match ? match[1] : null;
+      const token = match ? match[2] : null;
+      const title = link.textContent.trim() || 'Untitled';
+
+      console.log(`  📝 [${index}] Creando checkbox para manga ID: ${mangaId}`);
+
+      // Guardar metadatos completos en el Map
+      if (mangaId && token) {
+        const metadata = {
+          id: mangaId,
+          token: token,
+          title: title,
+          url: link.href,
+          baseUrl: `https://e-hentai.org/g/${mangaId}/${token}/`
+        };
+        mangaMetadata.set(mangaId, metadata);
+        console.log(`  💾 Metadatos guardados para ID ${mangaId}: ${title.substring(0, 30)}...`);
+      }
 
       // Crear checkbox
       const container = document.createElement('div');
@@ -210,12 +236,13 @@
 
       checkbox.addEventListener('change', (e) => {
         e.stopPropagation();
-        const match = link.href.match(/\/g\/(\d+)\/([a-f0-9]+)/);
-        if (match) {
+        if (mangaId) {
           if (checkbox.checked) {
-            selectedMangas.add(match[1]);
+            selectedMangas.add(mangaId);
+            console.log(`  ☑️ Manga ${mangaId} seleccionado`);
           } else {
-            selectedMangas.delete(match[1]);
+            selectedMangas.delete(mangaId);
+            console.log(`  ☐ Manga ${mangaId} deseleccionado`);
           }
           updateSelectedCount();
         }