fix: use thin border like we do everywhere else

src/components/generic/AAlert.vue

 <template>
   <div
     role="alert"
-    class="alert tw-border-2 tw-border-solid tw-p-3 tw-rounded tw-text-sm"
+    class="alert tw-border tw-border-solid tw-p-3 tw-rounded tw-text-sm"
     :class="{
       'tw-border-amber-200 tw-bg-amber-50 tw-text-amber-950': isWarning,
       'tw-border-rose-200 tw-bg-rose-50 tw-text-rose-950 dark:tw-bg-rose-800 dark:tw-border-rose-800 dark:tw-text-rose-50':