fix(app): harden account and workflow state

job-tracker-ui/src/components/ApplicationAssets.tsx

@@ -12,6 +12,7 @@ import { getApiErrorMessage } from "../api";
 import {
   ApplicationCv, CoverLetter, TailoringPlan, applicationAssetsApi,
 } from "../applicationWorkspace";
+import { cvBuilderApi } from "../cvBuilder";
 
 // Phase 5.4 — Application Assets sections for the workspace.
 //
@@ -100,6 +101,20 @@ export function ApplicationCvSection({ jobId }: { jobId: number }) {
 
   const attached = data?.attachedVariantId ?? "";
 
+  const duplicateForJob = async () => {
+    if (!data?.attachedVariantId) return;
+    setBusy(true);
+    try {
+      const copy = await cvBuilderApi.duplicate(data.attachedVariantId, `${data.attachedVariantName || "CV"} — tailored copy`);
+      setData(await applicationAssetsApi.attachVariant(jobId, copy.id));
+      window.location.assign(`/career/builder/${copy.id}`);
+    } catch (err) {
+      setError(getApiErrorMessage(err, "Could not create a tailored CV copy."));
+    } finally {
+      setBusy(false);
+    }
+  };
+
   return (
     <Stack spacing={2}>
       <Shell
@@ -155,6 +170,9 @@ export function ApplicationCvSection({ jobId }: { jobId: number }) {
                   >
                     Edit, preview and export
                   </Button>
+                  <Button size="small" variant="contained" disabled={busy} onClick={() => void duplicateForJob()}>
+                    Duplicate for this job
+                  </Button>
                 </Stack>
               </Stack>
             </Paper>