fix(tts): long-poll all batch jobs concurrently so finished clips are seen at once

static/index.html

@@ -158,7 +158,7 @@
 </section>
 
 <script>if ("serviceWorker" in navigator) { navigator.serviceWorker.register("/sw.js", { scope: "/" }); }</script>
-<script src="/static/tts-client.js?v=clips-7"></script>
+<script src="/static/tts-client.js?v=clips-8"></script>
 <script src="/static/app.js?v=phrases-3"></script>
 </body>
 </html>

static/tts-client.js

@@ -830,16 +830,16 @@ if (typeof document !== "undefined") window.CCRDSpeech = (() => {
     const epoch = value.seekEpoch;
     clearTimeout(value.timer); value.pumpEpoch = epoch;
     try {
+      // Jobs are long-polled concurrently. Polled one after another, the next
+      // batch (queued behind this one on the single worker) held each round for
+      // its full 8 s wait, so this batch's finished clips were seen up to 9 s
+      // late (2026-10-20 cold CW:0: clips 2 and 3 arrived together, 4.9 s late).
       const current = value.jobs.get(value.batch.start);
-      if (current) await update(value, current);
-      if (!live(value) || epoch !== value.seekEpoch) return;
-      advance(value); // Never wait for speculative work before playing a part.
-      if (!live(value) || !value.wantsPlay) return;
-      for (const job of Array.from(value.jobs.values())) if (job.batch.start !== current?.batch.start) {
+      const jobs = [current, ...Array.from(value.jobs.values()).filter(job => job !== current)].filter(Boolean);
+      await Promise.all(jobs.map(async job => {
         await update(value, job);
-        if (!live(value) || epoch !== value.seekEpoch) return;
-        advance(value);
-      }
+        if (live(value) && epoch === value.seekEpoch) advance(value); // Never wait for speculative work.
+      }));
     } finally {
       if (epoch === value.seekEpoch) {
         value.pumpEpoch = null;