Nothing arrives unannounced: the horde gets its breather, the boss gets a name

THEY KEEP COMING is a 2.4s 'over' beat again (warnHorde in beats.js) instead of a
flash raised on the same frame the wave lands, and the chapter boss walks on behind
an overlay — his name in red over ENTERED THE COURT — held for 3s by the new
self-dismissing modal clock (m.hold) rather than announced on a routine-set card.

startHorde returns a bool: if the court has been taken when the warning expires the
pendingHorde latch is re-armed rather than the set losing the horde it paid for. The
warning ticks on its own clock, not on the 'over' beat, so a beat that moves the
phase underneath it can't strand it (the mgT lock, again).

Three tests, 15 total.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

src/main.js

@@ -211,7 +211,7 @@ document.getElementById('hot').addEventListener('pointerdown', () => {
 function intoSplatter() {
   if (G.mode === 'tennis') forceZombies();
   for (let i = 0; i < 900 && G.mode !== 'splatter'; i++) update(1 / 60);
-  G.modal = null; G.horde = null; G.interlude = false; G.changeover = 0; G.clearing = false;
+  G.modal = null; G.horde = null; G.hordeWarn = 0; G.interlude = false; G.changeover = 0; G.clearing = false;
   G.mgT = 0; G.gunId = null; G.beam = null; G.hp = G.hpMax = TUNE.playerHp;
   zombies.length = 0; shots.length = 0; pellets.length = 0;
   score.server = 'P'; setupPoint();
@@ -352,7 +352,7 @@ function laserScene() {
   paused = false;
   if (G.mode === 'tennis') forceZombies();
   for (let i = 0; i < 600; i++) update(1 / 60);      // ride the transition out into splatter
-  G.modal = null; G.horde = null; G.interlude = false; G.changeover = 0; G.clearing = false;
+  G.modal = null; G.horde = null; G.hordeWarn = 0; G.interlude = false; G.changeover = 0; G.clearing = false;
   G.mgT = 0; G.gunId = null; G.beam = null; G.bossFight = 0; G.hp = G.hpMax = TUNE.playerHp;
   zombies.length = 0; pellets.length = 0; parts.length = 0; gore.length = 0; piles.length = 0;
   score.server = 'P'; setupPoint();