fix: persist artefact review link by deriving URL from approval_token

Previously the review URL was only stored in component state and lost
when the panel was reopened. Now derives it from the artefact's
approval_token field, matching how PostDetailPanel works.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

client/src/components/ArtefactDetailPanel.jsx

@@ -40,7 +40,7 @@ export default function ArtefactDetailPanel({ artefact, onClose, onUpdate, onDel
   const [versionData, setVersionData] = useState(null)
   const [loading, setLoading] = useState(true)
   const [submitting, setSubmitting] = useState(false)
-  const [reviewUrl, setReviewUrl] = useState('')
+  const [freshReviewUrl, setFreshReviewUrl] = useState('')
   const [copied, setCopied] = useState(false)
   const [activeTab, setActiveTab] = useState('details')
 
@@ -52,6 +52,7 @@ export default function ArtefactDetailPanel({ artefact, onClose, onUpdate, onDel
   const [editApproverIds, setEditApproverIds] = useState(
     artefact.approvers?.map(a => String(a.id)) || (artefact.approver_ids ? artefact.approver_ids.split(',').map(s => s.trim()).filter(Boolean) : [])
   )
+  const reviewUrl = freshReviewUrl || (artefact.approval_token ? `${window.location.origin}/review/${artefact.approval_token}` : '')
   const [savingDraft, setSavingDraft] = useState(false)
   const [deleting, setDeleting] = useState(false)
   const [confirmDeleteLangId, setConfirmDeleteLangId] = useState(null)
@@ -245,7 +246,7 @@ export default function ArtefactDetailPanel({ artefact, onClose, onUpdate, onDel
     setSubmitting(true)
     try {
       const res = await api.post(`/artefacts/${artefact.Id}/submit-review`)
-      setReviewUrl(res.reviewUrl || res.data?.reviewUrl || '')
+      setFreshReviewUrl(res.reviewUrl || res.data?.reviewUrl || '')
       toast.success(t('artefacts.submittedForReview'))
       onUpdate()
     } catch (err) {