fix: captcha ref not defined

src/components/Login/LoginForm.vue

@@ -1,5 +1,5 @@
 <script setup>
-import { ref, watch, computed } from 'vue';
+import { ref, watch, computed, useTemplateRef } from 'vue';
 import CAPTCHA from '../CAPTCHA.vue';
 
 const emit = defineEmits(['login-submit']);
@@ -7,6 +7,7 @@ const emit = defineEmits(['login-submit']);
 const username = ref('');
 const password = ref('');
 
+const captcha = useTemplateRef('captcha');
 const captchaResponse = ref(null);
 const captchaVerified = computed(() => {
   return captchaResponse.value !== null;
@@ -91,6 +92,7 @@ const submit = () => {
         </div>
       </div>
       <CAPTCHA
+        ref="captcha"
         :hcaptchaSitekey="$hcaptchaSitekey"
         :recaptchaSitekey="$recaptchaSitekey"
         :turnstileSitekey="$turnstileSitekey"