Implement cache busting query parameters on all redirects to viewer.html to prevent stale cached mobile view

frontend/app.js

@@ -2877,7 +2877,7 @@ if (viewOnMobileBtn) {
         
         // Resolve absolute GLTF URL
         const absoluteModelUrl = activeGltfUrl.startsWith('http') ? activeGltfUrl : `${window.location.origin}${activeGltfUrl}`;
-        const viewerUrl = `${window.location.origin}/viewer.html?model=${encodeURIComponent(absoluteModelUrl)}`;
+        const viewerUrl = `${window.location.origin}/viewer.html?v=119&model=${encodeURIComponent(absoluteModelUrl)}`;
         
         // Generate QR code image url using public API
         const qrApiUrl = `https://api.qrserver.com/v1/create-qr-code/?size=200x200&data=${encodeURIComponent(viewerUrl)}`;
@@ -3965,7 +3965,7 @@ function checkMobileRedirect() {
                     La creación, edición y limpieza de mallas está diseñada para pantallas de PC/Laptops. En celulares, te recomendamos usar el visor 3D táctil optimizado y proyectar en Realidad Aumentada (AR).
                 </p>
                 <div style="display: flex; flex-direction: column; gap: 12px; width: 100%;">
-                    <a href="/viewer.html" style="background: #7c3aed; color: #ffffff; padding: 14px; border-radius: 10px; text-decoration: none; font-weight: 700; font-size: 0.95rem; display: block; box-shadow: 0 4px 12px rgba(124, 58, 237, 0.3);">
+                    <a href="/viewer.html?v=119" style="background: #7c3aed; color: #ffffff; padding: 14px; border-radius: 10px; text-decoration: none; font-weight: 700; font-size: 0.95rem; display: block; box-shadow: 0 4px 12px rgba(124, 58, 237, 0.3);">
                         Abrir Visor Móvil (AR)
                     </a>
                     <button id="btnStayOnPCWeb" style="background: transparent; border: 1px solid rgba(255,255,255,0.15); color: #a1a1aa; padding: 12px; border-radius: 10px; font-weight: 600; font-size: 0.9rem; cursor: pointer; transition: all 0.2s;">

frontend/index.html

@@ -8,7 +8,7 @@
     <!-- Immediate Mobile Redirect -->
     <script>
         if (window.innerWidth < 768 && sessionStorage.getItem('forceDesktop') !== 'true') {
-            window.location.href = '/viewer.html';
+            window.location.href = '/viewer.html?v=119';
         }
     </script>