chore: add new button

frontend-prep/src/pages/User/ProfilePage.tsx

@@ -87,6 +87,11 @@ export default function ProfilePage() {
     setTimeout(() => setErrorMsg(''), 4000);
   };
 
+  const saveAddress = () => {
+    localStorage.setItem(STORAGE_ADDRESS, defaultAddress.trim());
+    showSuccess('Adresse par défaut enregistrée');
+  };
+
   const saveLocal = () => {
     localStorage.setItem(STORAGE_ADDRESS, defaultAddress.trim());
     localStorage.setItem(STORAGE_PHONE, defaultPhone.trim());
@@ -238,6 +243,9 @@ export default function ProfilePage() {
               placeholder="Numéro, rue, ville, code postal"
             />
           </div>
+          <button className="profile-btn profile-btn--secondary" onClick={saveAddress} style={{ marginTop: '0.8rem' }}>
+            <FontAwesomeIcon icon={faSave} /> Enregistrer l'adresse
+          </button>
         </div>
 
         {/* Section contact commande */}