Fold the menu into the title screen, and stop the theme restarting

The menu stage was the same logo on the same backdrop with two buttons, so it
read as the title screen failing to advance. The buttons move onto the title
screen in place of the control list, which is the tutorial's job now.

Death no longer reloads the page. The reload was an honest full reset, but it
also tore down the AudioContext — so the theme restarted from silence every
time you died, when it should carry straight on from the death summary into the
title screen. restartRun() puts G, P, O, ball and score back from a
structuredClone taken at module load (all plain data, so the clone is the whole
job and a field added later is covered for free), and the two modules with
timers of their own reset themselves: every zombies array plus spawnT/moanT/
mgTick, and input's held keys and half-finished drags, which would otherwise be
inherited by the next run's first frame.

The overlay is hidden rather than removed so it can come straight back, which
needs its own [hidden] rule to beat the display:grid on #intro.

The theme starts on the first tap and never restarts: loopBed's beds.has guard
already makes every later menuMusic() a no-op.

Verified: one background-music fetch across launch -> run -> death -> title ->
second run, and a full second run through the transition after the in-place
reset.

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

gameplay.js

@@ -1,11 +1,11 @@
 // Game logic: ballistics, swings, serves, rules/scoring, AI, and the per-frame update.
 
 import { TUNE, UI, BOSS_ART, APPLAUSE_T, EATEN_BURST, EATEN_SUMMARY, COURT, CONTACT, VOLLEY, ZONE_DEPTH, HOME, P_BOUNDS, TOSS, SHOT_DEPTH, POSE_TIME, BOUNCE_IDLE } from './config.js';
-import { P, O, ball, score, crowd, G, other, deuceSide, setupPoint, sendBoy } from './state.js';
+import { P, O, ball, score, crowd, G, other, deuceSide, setupPoint, sendBoy, resetState } from './state.js';
 import { audio, pock, swish, whoosh, applause, voice, sfx, aww, zombieMusic, zombieDuck, menuDuck } from './audio.js';
-import { axisX, axisZ, takeFlickAim, touchPX } from './input.js';
+import { axisX, axisZ, takeFlickAim, touchPX, resetInput } from './input.js';
 import { W } from './render.js'; // runtime-only cycle (render imports gameplay), same pattern as input/zombies
-import { updateZombies, spawnZombie, spawnRacketZombie, spawnMachine, spawnChapterBoss, zombies, gore, explode, meleeSwipe, extras, parts, pellets, shots, playerGore, eatenBleed } from './zombies.js';
+import { updateZombies, spawnZombie, spawnRacketZombie, spawnMachine, spawnChapterBoss, zombies, gore, explode, meleeSwipe, extras, parts, pellets, shots, playerGore, eatenBleed, resetZombies } from './zombies.js';
 
 // ------------------------------------------------------------- ballistics ----
 // Launch ball from (x0,y0,z0) so it lands at (tx, tz) with horizontal speed s under gravity g.
@@ -551,6 +551,15 @@ function startHorde() {
 }
 
 // hidden shortcut: tapping the umpire three times summons the horror early
+// Back to a fresh run WITHOUT reloading the page. The reload was the honest reset, but it also tore
+// down the AudioContext, so the menu theme restarted from silence every time you died — and the menu
+// is supposed to pick up the track that was already playing over the death summary. Every mutable
+// bag has a pristine copy (state.resetState) and the two modules with timers of their own put them
+// back themselves, so nothing here has to know the shape of any of it.
+export function restartRun() {
+  resetZombies(); resetInput(); resetState(); setupPoint();
+}
+
 export function forceZombies() {
   if (G.mode === 'splatter') { startHorde(); return; } // in splatter the cheat forces a horde wave
   if (G.mode !== 'tennis') return;