✨ Story 5.4: reCAPTCHA v3

assets/js/contact-form.js

@@ -294,7 +294,38 @@ class ContactFormPersistence {
     }
 }
 
+const RecaptchaService = {
+    siteKey: null,
+
+    init() {
+        this.siteKey = window.RECAPTCHA_SITE_KEY || null;
+    },
+
+    isAvailable() {
+        return this.siteKey && typeof grecaptcha !== 'undefined';
+    },
+
+    async getToken(action = 'contact') {
+        if (!this.isAvailable()) {
+            console.warn('reCAPTCHA non disponible, envoi sans protection');
+            return '';
+        }
+
+        return new Promise((resolve) => {
+            grecaptcha.ready(() => {
+                grecaptcha.execute(this.siteKey, { action })
+                    .then((token) => resolve(token))
+                    .catch((error) => {
+                        console.error('Erreur reCAPTCHA:', error);
+                        resolve('');
+                    });
+            });
+        });
+    }
+};
+
 document.addEventListener('DOMContentLoaded', () => {
+    RecaptchaService.init();
     window.contactFormValidator = new FormValidator('contact-form');
     window.contactFormPersistence = new ContactFormPersistence('contact-form');
 });