refactor(auth): replace anchor navigation links with Button components and improve auth page styling

src/features/auth/pages/LoginPage.client.js

@@ -151,6 +151,7 @@ export default function LoginPage({ onSubmit, onNavigate, onSetSessionCookie, re
         <Button
           type="button"
           variant="primary"
+          size="lg"
           loading={isLoading}
           disabled={!!success || !!currentUser}
           onClick={handleSubmit}
@@ -160,18 +161,15 @@ export default function LoginPage({ onSubmit, onNavigate, onSetSessionCookie, re
         </Button>
       </div>
 
-      <div className={`mt-6 text-center transition-opacity duration-200 ${currentUser ? 'opacity-50 pointer-events-none' : ''}`}>
-        <a
-          href="#"
-          onClick={(e) => {
-            e.preventDefault();
-            if (!currentUser) onNavigate('register');
-          }}
-          className="group flex items-center justify-center gap-2"
+      <div className={`mt-6 flex justify-center transition-opacity duration-200 ${currentUser ? 'opacity-50 pointer-events-none' : ''}`}>
+        <Button
+          type="button"
+          variant="ghost"
+          disabled={!!currentUser}
+          onClick={() => { if (!currentUser) onNavigate('register'); }}
         >
-          <span className="text-sm text-neutral-600 dark:text-neutral-400">Pas de compte ? </span>
-          <span className="text-sm text-neutral-900 group-hover:text-neutral-600 font-medium transition-colors duration-200 dark:text-white dark:group-hover:text-neutral-300">S'inscrire</span>
-        </a>
+          Pas de compte ? S'inscrire
+        </Button>
       </div>
     </Card>
   );