DRY pass #3: one one-time secret reveal (#5373)

AccountView's device-token reveal was OneTimeLink's markup and copy handler
again. OneTimeLink becomes OneTimeSecret (value, note, noun = link | token),
and the account page shows a new token through it.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

frontend/src/components/InviteList.vue

@@ -5,7 +5,7 @@ import { errorMessage } from "../api/errors";
 import { appLink } from "../router/links";
 import BaseButton from "./BaseButton.vue";
 import BaseInput from "./BaseInput.vue";
-import OneTimeLink from "./OneTimeLink.vue";
+import OneTimeSecret from "./OneTimeSecret.vue";
 import { toastOnFailure, useLoad } from "../composables/useAction";
 
 // Admin: invite one person to register while registration stays closed (#5172).
@@ -97,9 +97,9 @@ onMounted(() => {
   <section class="flex flex-col gap-5">
     <h2 class="section-label">Invites</h2>
 
-    <OneTimeLink
+    <OneTimeSecret
       v-if="freshLink"
-      :link="freshLink"
+      :value="freshLink"
       note="Send this to the person you're inviting."
       @done="freshLink = ''"
     />