fix(apply): check saveCoverLetter error; document cover-letter-generated in wrapper

web/src/components/ApplyWorkspace.vue

@@ -288,12 +288,16 @@ async function generate() {
 
 async function saveCoverLetter() {
   saving.value = true
-  await useApiFetch(`/api/jobs/${props.jobId}/cover_letter`, {
+  const { error } = await useApiFetch(`/api/jobs/${props.jobId}/cover_letter`, {
     method:  'PATCH',
     headers: { 'Content-Type': 'application/json' },
     body:    JSON.stringify({ text: clText.value }),
   })
   saving.value = false
+  if (error) {
+    showToast('Save failed — please try again')
+    return
+  }
   isSaved.value = true
 }
 

web/src/views/ApplyWorkspaceView.vue

@@ -1,4 +1,8 @@
 <template>
+  <!--
+    @cover-letter-generated is intentionally not forwarded here.
+    The Marathon badge lives in ApplyView.vue (desktop split-pane only) — the full-page route is mobile-only.
+  -->
   <ApplyWorkspace
     :job-id="jobId"
     @job-removed="router.push('/apply')"