fix: Corregir cálculo de excedente para casas con consumo_only

- Agregar método getExpectedAmountWithDiscount() que retorna el monto sin descuento de 00
- El excedente ahora se calcula contra el monto original configurado, no contra el monto con descuento
- Casas que pagan exactamente el monto por casa aparecen al corriente (/bin/bash.00)
- Casas que pagan más del monto por casa muestran excedente

views/payments/pdf_template.php

@@ -58,6 +58,7 @@
         foreach ($houses as $house):
             $total = 0;
             $totalExpected = 0;
+            $totalExpectedOriginal = 0;
         ?>
             <tr>
                 <td><strong><?= $house['number'] ?></strong></td>
@@ -68,8 +69,10 @@
                     $monthTotals[$month] += $amount;
 
                     $expected = Payment::getExpectedAmount($house, $year, $month);
+                    $expectedOriginal = Payment::getExpectedAmountWithDiscount($house, $year, $month);
                     $total += $amount;
                     $totalExpected += $expected;
+                    $totalExpectedOriginal += $expectedOriginal;
 
                     $bg_color = '#FFFFFF'; // Default white
                     if ($house['status'] == 'deshabitada') {
@@ -89,7 +92,7 @@
                     </td>
                 <?php endforeach; ?>
                 <?php
-                    $difference = $total - $totalExpected;
+                    $difference = $total - $totalExpectedOriginal;
                     $diffColor = $difference < 0 ? 'red' : 'green';
                     $diffText = $difference == 0 ? '$0.00' : '$' . number_format($difference, 2);
                     $grandTotal += $total;