Keep active task transcripts in memory for instant task switching

web/dist/app.js

@@ -72,7 +72,7 @@ async function main() {
     subscribe(status.last_event_seq, {}, handleEvent, (connected) => {
         state.connected = connected;
         notify("connection");
-    });
+    }, () => undefined);
     addEventListener("hashchange", route);
     route();
 }