Avoid reflow by showing chat thunk status in a toast

src/app/components/CalendarEventForm.svelte

@@ -33,6 +33,8 @@
 
   const {url, header, initialValues}: Props = $props()
 
+  const shouldProtect = canEnforceNip70(url)
+
   const uploading = writable(false)
 
   const back = () => history.back()
@@ -75,7 +77,7 @@
       ...ed.storage.nostr.getEditorTags(),
     ]
 
-    if (await canEnforceNip70(url)) {
+    if (await shouldProtect) {
       tags.push(PROTECTED)
     }