fix: agrega helper esc en accounting.js y placeholder para pagos a proveedor

pos/static/js/accounting.js

@@ -25,6 +25,12 @@ const Accounting = (() => {
     function fmt(n) {
         return parseFloat(n || 0).toLocaleString('es-MX', { minimumFractionDigits: 2, maximumFractionDigits: 2 });
     }
+    function esc(s) {
+        if (!s) return '';
+        const d = document.createElement('div');
+        d.textContent = s;
+        return d.innerHTML;
+    }
 
     // ---- Auth check ----
     function checkAuth() {
@@ -236,7 +242,7 @@ const Accounting = (() => {
                     <td class="td--amount">$${fmt(r.paid || 0)}</td>
                     <td class="td--amount">$${fmt(r.balance || r.total)}</td>
                     <td>${statusBadge(status, label)}</td>
-                    <td><button class="btn btn--ghost btn--sm">${r.balance > 0 ? 'Pagar' : 'Ver'}</button></td>
+                    <td><button class="btn btn--ghost btn--sm" onclick="alert('Pago a proveedor aún no está implementado')">${r.balance > 0 ? 'Pagar' : 'Ver'}</button></td>
                 </tr>`;
             }).join('');
 

pos/static/pwa/sw.js

@@ -6,7 +6,7 @@
 // The fetch handler normalizes static asset URLs (strips ?v= query strings)
 // so templates can use cache-busting query params freely.
 
-const CACHE_NAME = 'nexus-pos-v22';
+const CACHE_NAME = 'nexus-pos-v23';
 
 const APP_SHELL = [
   '/pos/static/css/tokens.css',

pos/templates/accounting.html

@@ -499,7 +499,7 @@
   <script src="/pos/static/js/splash-loader.js?v=1" defer></script>
   <script src="/pos/static/js/pos-utils.js?v=2" defer></script>
   <script src="/pos/static/js/sidebar.js" defer></script>
-  <script src="/pos/static/js/accounting.js?v=1" defer></script>
+  <script src="/pos/static/js/accounting.js?v=2" defer></script>
   <script src="/pos/static/js/sync-engine.js" defer></script>
   <script>if('serviceWorker' in navigator){navigator.serviceWorker.register('/pos/sw.js',{scope:'/pos/'});}</script>
   <script src="/pos/static/js/pwa-install.js" defer></script>