feat(customers): show vehicles and delete customer

- get_customer now returns fleet_vehicles assigned to the customer.

- Added DELETE /pos/api/customers/<id> soft-delete (is_active=false) with customers.delete permission.

- Added Vehicles section in customer detail panel.

- Added Eliminar button in quick actions (owner/admin/customers.delete).

pos/static/js/customers.js

@@ -11,6 +11,11 @@ const Customers = (() => {
     let currentCustomer = null;
     let searchTimeout = null;
 
+    const user = window.POS_USER || {};
+    const userRole = (user.role || '').toLowerCase();
+    const userPerms = user.permissions || [];
+    const canDeleteCustomer = userRole === 'owner' || userRole === 'admin' || userPerms.includes('customers.delete');
+
     const fmt = (n) => '$' + parseFloat(n || 0).toLocaleString('es-MX', {
         minimumFractionDigits: 2, maximumFractionDigits: 2
     });
@@ -295,6 +300,28 @@ const Customers = (() => {
             const discountEl = document.getElementById('detailMaxDiscount');
             if (discountEl) discountEl.textContent = (c.max_discount_pct || 0) + '%';
 
+            // Vehicles
+            const vehiclesEl = document.getElementById('detailVehicles');
+            if (vehiclesEl) {
+                const vehicles = c.fleet_vehicles || [];
+                if (vehicles.length === 0) {
+                    vehiclesEl.innerHTML = '<span style="color:var(--color-text-muted);">Sin veh&iacute;culos registrados</span>';
+                } else {
+                    vehiclesEl.innerHTML = vehicles.map(v => {
+                        const title = [v.year, v.make, v.model].filter(Boolean).join(' ');
+                        const subtitle = [v.plate, v.vin, v.color].filter(Boolean).join(' · ');
+                        return `<div class="vehicle-row" style="padding:var(--space-2);border:1px solid var(--color-border);border-radius:var(--radius-md);">
+                            <div style="font-weight:600;">${title || 'Veh&iacute;culo'}</div>
+                            <div style="font-size:var(--text-caption);color:var(--color-text-muted);">${subtitle}</div>
+                        </div>`;
+                    }).join('');
+                }
+            }
+
+            // Delete button visibility
+            const btnDelete = document.getElementById('btnDeleteCustomer');
+            if (btnDelete) btnDelete.style.display = canDeleteCustomer ? 'inline-flex' : 'none';
+
             // Re-wire action buttons after detail panel is visible
             wireActionButtons();
 
@@ -396,7 +423,7 @@ const Customers = (() => {
     // Wire action buttons in detail panel
     function wireActionButtons() {
         const btns = document.querySelectorAll('.quick-actions .action-btn');
-        // Order: Nueva Venta, Editar, Estado de Cuenta, Historial
+        // Order: Nueva Venta, Editar, Estado de Cuenta, Historial, Eliminar
         if (btns.length >= 1) btns[0].onclick = () => {
             if (currentCustomer) window.location.href = '/pos/sale?customer=' + currentCustomer.id;
         };
@@ -405,8 +432,29 @@ const Customers = (() => {
         if (btns.length >= 4) btns[3].onclick = () => {
             if (currentCustomer) showCustomerHistory(currentCustomer.id);
         };
+        const btnDelete = document.getElementById('btnDeleteCustomer');
+        if (btnDelete) btnDelete.onclick = () => deleteCustomer();
     }
 
+    async function deleteCustomer() {
+        if (!currentCustomer) return;
+        if (!canDeleteCustomer) {
+            alert('No tienes permiso para eliminar clientes');
+            return;
+        }
+        if (!confirm(`¿Eliminar al cliente "${currentCustomer.name}"? Se marcará como inactivo.`)) return;
+        try {
+            await api(`/pos/api/customers/${currentCustomer.id}`, { method: 'DELETE' });
+            alert('Cliente eliminado');
+            currentCustomer = null;
+            closeDetail();
+            loadCustomers(currentPage);
+        } catch (e) {
+            alert('Error: ' + e.message);
+        }
+    }
+    window.deleteCustomer = deleteCustomer;
+
     async function showCustomerHistory(customerId) {
         try {
             const res = await api(`/pos/api/customers/${customerId}/purchases`);
@@ -906,6 +954,7 @@ const Customers = (() => {
         showStatement, closeStatement,
         showPaymentModal, closePayment, recordPayment,
         showCustomerHistory, closeCustomerHistoryModal,
+        deleteCustomer,
     };
 
     // Register Cmd+K items