feat: Agregar filtros avanzados a reporte de Deudores de Conceptos

- Filtros por casas: selección múltiple con opción 'Todas las casas'
- Filtros por conceptos: selección múltiple con opción 'Todos los conceptos'
- Estado inicial: todos los filtros marcados por defecto (muestra toda la info)
- Exportación PDF: incluye solo datos filtrados según selección
- JavaScript interactivo: lógica de checkboxes con estados intermedios
- Modelo actualizado: método getConceptDebtorsFiltered para filtrado avanzado
- Interfaz intuitiva: scrollable containers para listas largas
- Preserva permisos: respeta restricciones de acceso por casas

models/Report.php

@@ -482,4 +482,100 @@ class Report {
             'total_due' => $grandTotal
         ];
     }
+
+    public static function getConceptDebtorsFiltered($houseIds, $conceptIds = null) {
+        $db = Database::getInstance();
+
+        $whereConditions = [];
+        $params = [];
+
+        // Base conditions
+        $whereConditions[] = "h.status = 'activa'";
+        $whereConditions[] = "(cc.amount_per_house - COALESCE(cp.amount, 0)) > 0";
+
+        // House filter
+        if (!empty($houseIds)) {
+            $placeholders = str_repeat('?,', count($houseIds) - 1) . '?';
+            $whereConditions[] = "h.id IN ({$placeholders})";
+            $params = array_merge($params, $houseIds);
+        }
+
+        // Concept filter
+        if (!empty($conceptIds)) {
+            $placeholders = str_repeat('?,', count($conceptIds) - 1) . '?';
+            $whereConditions[] = "cc.id IN ({$placeholders})";
+            $params = array_merge($params, $conceptIds);
+        }
+
+        $whereClause = implode(' AND ', $whereConditions);
+
+        $query = "
+            SELECT
+                h.number as house_number,
+                h.owner_name,
+                cc.name as concept_name,
+                cc.id as concept_id,
+                cc.amount_per_house,
+                COALESCE(cp.amount, 0) as paid_amount,
+                (cc.amount_per_house - COALESCE(cp.amount, 0)) as debt_amount,
+                cc.concept_date,
+                cp.payment_date
+            FROM houses h
+            CROSS JOIN finance_collection_concepts cc
+            LEFT JOIN finance_collection_payments cp ON cp.house_id = h.id AND cp.concept_id = cc.id
+            WHERE {$whereClause}
+            ORDER BY cc.name, h.number, cc.concept_date DESC
+        ";
+
+        $results = $db->fetchAll($query, $params);
+
+        // Group by concept like the original method
+        $debtors = [];
+        $grandTotal = 0;
+
+        $groupedResults = [];
+        foreach ($results as $row) {
+            $key = $row['concept_name'];
+            if (!isset($groupedResults[$key])) {
+                $groupedResults[$key] = [
+                    'concept_name' => $row['concept_name'],
+                    'concept_id' => $row['concept_id'],
+                    'amount_per_house' => $row['amount_per_house'],
+                    'house_debtors' => []
+                ];
+            }
+            $groupedResults[$key]['house_debtors'][] = [
+                'house_number' => $row['house_number'],
+                'owner_name' => $row['owner_name'],
+                'expected' => $row['amount_per_house'],
+                'paid' => $row['paid_amount'],
+                'due' => $row['debt_amount']
+            ];
+        }
+
+        // Calculate totals for each concept
+        foreach ($groupedResults as $concept) {
+            $totalExpected = count($concept['house_debtors']) * $concept['amount_per_house'];
+            $totalCollected = array_sum(array_column($concept['house_debtors'], 'paid'));
+            $conceptTotalDue = $totalExpected - $totalCollected;
+
+            if ($conceptTotalDue > 0) {
+                $debtors[] = [
+                    'concept_name' => $concept['concept_name'],
+                    'concept_id' => $concept['concept_id'],
+                    'amount_per_house' => $concept['amount_per_house'],
+                    'total_expected' => $totalExpected,
+                    'total_collected' => $totalCollected,
+                    'total_due' => $conceptTotalDue,
+                    'house_debtors' => $concept['house_debtors']
+                ];
+                $grandTotal += $conceptTotalDue;
+            }
+        }
+
+        return [
+            'debtors' => $debtors,
+            'total_due' => $grandTotal
+        ];
+    }
 }