Add comprehensive debugging to popup

🔍 Debug logging added:
- Log every updateProgress() call with parameters
- Check if popup exists before updating
- Log percentage calculations
- Verify all DOM elements are found
- Log each element update (title, count, percent, status, bar)
- Force popup visibility with display: block and opacity: 1
- Log popup position on screen

This will help identify exactly where the popup is failing

content.js

@@ -64,8 +64,19 @@
 
   // Actualizar progreso
   function updateProgress(current, total, title, status) {
-    const popup = document.getElementById('mass-downloader-progress-popup') || createFloatingProgressPopup();
+    console.log('📊 updateProgress() llamado:', { current, total, title, status });
+
+    let popup = document.getElementById('mass-downloader-progress-popup');
+
+    if (!popup) {
+      console.log('⚠️ Popup no existe, creando uno nuevo...');
+      popup = createFloatingProgressPopup();
+    } else {
+      console.log('✅ Popup existe, actualizando...');
+    }
+
     const percent = total > 0 ? Math.round((current / total) * 100) : 0;
+    console.log(`📈 Porcentaje calculado: ${percent}%`);
 
     const titleEl = document.getElementById('progress-title');
     const countEl = document.getElementById('progress-count');
@@ -73,13 +84,39 @@
     const statusEl = document.getElementById('progress-status');
     const barEl = document.getElementById('progress-bar-fill');
 
-    if (titleEl) titleEl.textContent = title || 'Descargando...';
-    if (countEl) countEl.textContent = `${current} / ${total}`;
-    if (percentEl) percentEl.textContent = `${percent}%`;
-    if (statusEl) statusEl.textContent = status || '';
-    if (barEl) barEl.style.width = `${percent}%`;
+    console.log('🔍 Elementos encontrados:', {
+      titleEl: !!titleEl,
+      countEl: !!countEl,
+      percentEl: !!percentEl,
+      statusEl: !!statusEl,
+      barEl: !!barEl
+    });
+
+    if (titleEl) {
+      titleEl.textContent = title || 'Descargando...';
+      console.log('📝 Título actualizado:', titleEl.textContent);
+    }
+    if (countEl) {
+      countEl.textContent = `${current} / ${total}`;
+      console.log('🔢 Contador actualizado:', countEl.textContent);
+    }
+    if (percentEl) {
+      percentEl.textContent = `${percent}%`;
+      console.log('📊 Porcentaje actualizado:', percentEl.textContent);
+    }
+    if (statusEl) {
+      statusEl.textContent = status || '';
+      console.log('💬 Status actualizado:', statusEl.textContent);
+    }
+    if (barEl) {
+      barEl.style.width = `${percent}%`;
+      console.log('📊 Barra actualizada:', `${percent}%`);
+    }
 
     popup.style.display = 'block';
+    popup.style.opacity = '1';
+    console.log('✅ Popup visible, display:', popup.style.display);
+    console.log('✅ Popup en pantalla:', popup.getBoundingClientRect());
   }
 
   // Ocultar progreso