fix: initialize DataTables separately for each table with correct column indices

- leadsTable (dashboard): 6 columns, sort by date (column 3)
- fullLeadsTable (leads section): 9 columns with checkbox, sort by date (column 6)
- Fixed JavaScript error from wrong column index
- Added separate initialization for each table

public/admin.html

@@ -2847,15 +2847,35 @@ Ver todos
             }
         });
 
-        // Initialize DataTables
-        $('#leadsTable, #fullLeadsTable').DataTable({
-            language: {
-                url: 'https://cdn.datatables.net/plug-ins/1.13.8/i18n/es-ES.json'
-            },
-            pageLength: 10,
-            ordering: true,
-            order: [[3, 'desc']]  // Sort by date column (0-indexed)
-        });
+        // Initialize DataTables (separately for each table with correct column indices)
+        // leadsTable: 6 columns (Cliente, Propiedad, Fuente, Fecha, Estado, Acciones)
+        // fullLeadsTable: 9 columns (checkbox, Cliente, Contacto, Propiedad, Presupuesto, Fuente, Fecha, Estado, Acciones)
+        
+        if ($('#leadsTable').length) {
+            $('#leadsTable').DataTable({
+                language: {
+                    url: 'https://cdn.datatables.net/plug-ins/1.13.8/i18n/es-ES.json'
+                },
+                pageLength: 5,
+                ordering: true,
+                order: [[3, 'desc']],  // Fecha column
+                searching: false,
+                lengthChange: false,
+                info: false,
+                paging: false
+            });
+        }
+        
+        if ($('#fullLeadsTable').length) {
+            $('#fullLeadsTable').DataTable({
+                language: {
+                    url: 'https://cdn.datatables.net/plug-ins/1.13.8/i18n/es-ES.json'
+                },
+                pageLength: 10,
+                ordering: true,
+                order: [[6, 'desc']]  // Fecha column (after checkbox = column 0)
+            });
+        }
 
         // ============ CHARTS ============
         const chartColors = {