fix(web): disable send button (#27051)

fix(web): disable button while sending

web/src/lib/components/admin-settings/NotificationSettings.svelte

@@ -11,7 +11,7 @@
   import { user } from '$lib/stores/user.store';
   import { handleError } from '$lib/utils/handle-error';
   import { sendTestEmailAdmin } from '@immich/sdk';
-  import { Button, LoadingSpinner, toastManager } from '@immich/ui';
+  import { Button, toastManager } from '@immich/ui';
   import { t } from 'svelte-i18n';
   import { fade } from 'svelte/transition';
 
@@ -142,6 +142,7 @@
               <Button
                 size="small"
                 shape="round"
+                loading={isSending}
                 disabled={!configToEdit.notifications.smtp.enabled}
                 onclick={handleSendTestEmail}
               >
@@ -151,9 +152,6 @@
                   {$t('admin.notification_email_sent_test_email_button')}
                 {/if}
               </Button>
-              {#if isSending}
-                <LoadingSpinner />
-              {/if}
             </div>
           </div>
         </SettingAccordion>