fix: preserve Gitea events on refresh failure (#41)

frontend/index.html

@@ -258,7 +258,7 @@ textarea { resize: vertical; min-height: 120px; }
       paintEventStream(await res.json());
       setEventStreamStatus('Updated ' + fmt(new Date()));
     } catch (e) {
-      qs('#gitea-events').innerHTML = '<div class="muted">Event stream unavailable.</div>';
+      setEventStreamStatus('Update failed · showing last activity');
     }
   }