Fix pie autoplay (#621)

* Fix pie chart auto-play stopping on no-transfer rounds

Add resumeFrom() to round player so the pie chart can advance the
dropdown during auto-play without stopping playback. When the pie
chart skips a round with no transfers, updateRound() now calls
resumeFrom() instead of setStep() to keep the animation going.

Co-Authored-By: Claude Opus 4.6

* Simplify auto-play fix: just skip setStep during playback

Revert round-player.js changes. The simpler approach is to skip
the setStep() call entirely during auto-play so it does not stop
playback. The round player timer catches up on its next tick.

Co-Authored-By: Claude Opus 4.6

---------

Co-authored-by: skaphan <skaphan@gmail.com>

Author: artoonie

templates/pie/pie-nonblocking.html

@@ -50,9 +50,14 @@
     // When the pie chart is animating it knows it is advancing rounds, but to avoid reactive
     // loops it requests to be told the new currentRound rather than using 2-way binding.
     // And we also update the slider state while we're at it.
+    //
+    // During auto-play, skip the setStep() call — it stops playback.
+    // The round player's timer will catch up on its next tick.
     function updateRound(roundNum) {
         pieChart.currentRound = roundNum;
-        pieRoundPlayer.setStep(roundNum - 1);
+        if (!pieRoundPlayer.playing()) {
+            pieRoundPlayer.setStep(roundNum - 1);
+        }
     }
 
 </script>