Keep active task transcripts in memory for instant task switching

web/dist/api.js

@@ -61,7 +61,7 @@ export function socket(path, opts) {
 }
 const staleAfterMs = 40_000;
 const retryAfterMs = 2_000;
-export function subscribe(after, filter, onEvent, onState) {
+export function subscribe(after, filter, onEvent, onState, onReady) {
     let last = after;
     let heard = Date.now();
     let source;
@@ -92,6 +92,10 @@ export function subscribe(after, filter, onEvent, onState) {
         s.addEventListener("ping", () => {
             heard = Date.now();
         });
+        s.addEventListener("ready", () => {
+            heard = Date.now();
+            onReady();
+        });
         s.onmessage = (msg) => {
             heard = Date.now();
             const ev = JSON.parse(msg.data);