fix: expose degraded fallback context status (#97)

frontend/index.html

@@ -216,7 +216,7 @@ textarea { resize: vertical; min-height: 120px; }
         '<div class="muted">' + escapeHtml(p.state) + ' by ' + escapeHtml(String(p.user || '')) + '</div></div>').join('') : '<div class="muted">No PRs.</div>');
 
       paintDeltas(data.deltas || []);
-      setStatus('Live · updated just now');
+      setStatus(data.error ? 'Degraded · ' + data.error : 'Live · updated just now');
       setClock();
     } catch (e) {
       console.error('context failed', e);