Fix multilingual support for product data and thank you redirect

- Add translate: false to price, hasOptions, and optionValues fields
- Make thank you page redirect language-aware (detects /fr/ prefix)
- Ensure stock, weight, dimensions, and options are shared between languages

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

assets/js/snipcart.js

@@ -7,7 +7,12 @@ window.SnipcartSettings = {
 // Redirection après paiement réussi
 document.addEventListener('snipcart.ready', function() {
   Snipcart.execute('bind', 'order.completed', function(order) {
-    window.location.href = '/thanks?order=' + order.token;
+    // Détecter la langue actuelle depuis l'URL
+    const currentPath = window.location.pathname;
+    const langMatch = currentPath.match(/^\/([a-z]{2})(\/|$)/);
+    const langPrefix = langMatch ? '/' + langMatch[1] : '';
+
+    window.location.href = langPrefix + '/thanks?order=' + order.token;
   });
 });