Admin tables: scroll instead of clipping the last column; Joined stays on one line

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

public/assets/admin.js

@@ -281,7 +281,7 @@
         + '<td>' + (a.memberId ? '#' + a.memberId : '<span class="muted">free</span>') + '</td>'
         + '<td class="mono small">' + (a.address ? esc(a.address.slice(0, 8) + '…' + a.address.slice(-6)) : '<span class="muted">none</span>') + '</td>'
         + '<td>' + esc(a.sponsorRef || '') + '</td><td class="small" title="linked Qualified Start positions' + (a.positionIds && a.positionIds.length ? ': #' + a.positionIds.join(', #') : '') + '">' + (a.positions ? a.positions : '<span class="muted">0</span>') + '</td><td class="small muted">' + esc(a.joinedVia || '') + '</td><td class="mono small">' + esc(a.code || '') + '</td>'
-        + '<td class="small muted">' + when(a.created) + '</td>'
+        + '<td class="small muted when">' + when(a.created) + '</td>'
         + '<td class="act"><button class="btn small sec" data-spon="' + esc(a.email) + '" data-cur="' + esc(a.sponsorRef || '') + '">Sponsor</button></td></tr>').join('');
   }
   $('memFilter').addEventListener('input', drawMembers);