fix(pos): wire buttons in contabilidad, facturacion, inventario, dashboard

- Contabilidad: Nueva Poliza modal + Exportar placeholder
- Facturacion: Nueva Factura modal (sale_id input) + Nota Credito placeholder
- Inventario: click en producto abre detalle con historial
- Dashboard: Ver Detalles navega a paginas relevantes, campana a alertas

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

pos/static/js/invoicing.js

@@ -438,11 +438,56 @@ const Invoicing = (() => {
 
     document.addEventListener('DOMContentLoaded', init);
 
+    // ---- Nueva Factura modal ----
+    function showNewInvoiceModal() {
+        const overlay = document.getElementById('newInvoiceModalOverlay');
+        if (!overlay) return;
+        const input = overlay.querySelector('#invoiceSaleId');
+        if (input) input.value = '';
+        document.getElementById('invoiceResult').innerHTML = '';
+        overlay.style.display = 'flex';
+    }
+
+    function closeNewInvoiceModal() {
+        const overlay = document.getElementById('newInvoiceModalOverlay');
+        if (overlay) overlay.style.display = 'none';
+    }
+
+    async function submitNewInvoice() {
+        const saleId = parseInt(document.getElementById('invoiceSaleId').value);
+        const resultEl = document.getElementById('invoiceResult');
+        if (!saleId) {
+            resultEl.innerHTML = '<span style="color:var(--color-error);">Ingrese un ID de venta valido.</span>';
+            return;
+        }
+        try {
+            const result = await api('/invoice', {
+                method: 'POST',
+                body: JSON.stringify({ sale_id: saleId }),
+            });
+            resultEl.innerHTML = '<span style="color:var(--color-success);">Factura generada: ' + (result.provisional_folio || 'CFDI-' + (result.id || '')) + '</span>';
+            loadFacturas();
+            setTimeout(() => closeNewInvoiceModal(), 1500);
+        } catch (e) {
+            resultEl.innerHTML = '<span style="color:var(--color-error);">Error: ' + e.message + '</span>';
+        }
+    }
+
+    // ---- Nota de Credito placeholder ----
+    function notaCreditoPlaceholder() {
+        alert('Nota de credito: proximamente');
+    }
+
     // Expose switchTab globally for onclick handlers in HTML
     window.switchTab = switchTab;
+    window.showNewInvoiceModal = showNewInvoiceModal;
+    window.closeNewInvoiceModal = closeNewInvoiceModal;
+    window.submitNewInvoice = submitNewInvoice;
+    window.notaCreditoPlaceholder = notaCreditoPlaceholder;
 
     return {
         switchTab, loadFacturas, loadNotas, loadComplementos, loadCancelaciones,
         showDetail, showCancelModal, confirmCancel, processQueue,
+        showNewInvoiceModal, closeNewInvoiceModal, submitNewInvoice, notaCreditoPlaceholder,
     };
 })();