fix: require feedback on post rejection, post-specific review text, show superadmins in team list

- Reject requires feedback on both client and server (400 if empty)
- PublicPostReview uses post-specific i18n keys instead of artefact ones
- Team list always includes superadmins/managers for non-superadmin users

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

client/src/pages/PublicPostReview.jsx

@@ -46,6 +46,10 @@ export default function PublicPostReview() {
       toast.error(t('review.enterName'))
       return
     }
+    if (action === 'reject' && !feedback.trim()) {
+      toast.error(t('review.feedbackRequiredError'))
+      return
+    }
     setPendingAction(action)
   }
 
@@ -276,7 +280,7 @@ export default function PublicPostReview() {
                   </div>
 
                   <div>
-                    <label className="block text-sm font-medium text-text-primary mb-1">{t('review.feedbackOptional')}</label>
+                    <label className="block text-sm font-medium text-text-primary mb-1">{t('review.feedbackRequired')}</label>
                     <textarea value={feedback} onChange={e => setFeedback(e.target.value)} rows={4}
                       placeholder={t('review.feedbackPlaceholder')}
                       className="w-full px-4 py-2 text-sm border border-border rounded-lg bg-surface text-text-primary focus:outline-none focus:ring-2 focus:ring-brand-primary/20 focus:border-brand-primary" />
@@ -328,13 +332,13 @@ export default function PublicPostReview() {
       <Modal
         isOpen={!!pendingAction}
         onClose={() => setPendingAction(null)}
-        title={pendingAction === 'approve' ? t('review.confirmApprove') : t('review.confirmReject')}
+        title={pendingAction === 'approve' ? t('review.confirmApprovePost') : t('review.confirmRejectPost')}
         isConfirm
         danger={pendingAction === 'reject'}
         onConfirm={() => { const a = pendingAction; setPendingAction(null); executeAction(a) }}
         confirmText={pendingAction === 'approve' ? t('review.approve') : t('review.reject')}
       >
-        {pendingAction === 'approve' ? t('review.confirmApproveDesc') : t('review.confirmRejectDesc')}
+        {pendingAction === 'approve' ? t('review.confirmApprovePostDesc') : t('review.confirmRejectPostDesc')}
       </Modal>
     </div>
   )