Splatter aiming targets zombies anywhere; triple-tap the umpire to skip ahead

- doHit/hitServe in splatter mode lock onto zombies instead of tennis court
  depths: your flick picks the lane and depth band, the shot targets the best
  match anywhere on the court (including your own side) with a walking lead;
  serves auto-track the most advanced shambler
- hidden shortcut: tap/click the umpire three times within 1.6s during tennis
  mode to summon the transition immediately

Verified: near-side and far zombies killable, cheat triggers transition,
tennis mode targeting untouched.

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

main.js

@@ -3,12 +3,13 @@
 // Module map: config (tuning/constants) · state (mutable game state) · gameplay (logic/update)
 //             render (camera/drawing) · input (keys/touch) · audio (sfx/umpire) · panel (T tuning UI)
 
-import { TUNE } from './config.js';
+import { TUNE, COURT, UMP_H } from './config.js';
 import { P, O, ball, score, G, setupPoint } from './state.js';
-import { update, keyPressed, solveShot, inServeBox, inCourt } from './gameplay.js';
+import { update, keyPressed, solveShot, inServeBox, inCourt, forceZombies } from './gameplay.js';
 import { fitViewport, render, proj } from './render.js';
 import { voice } from './audio.js';
 import { zombies, spawnZombie } from './zombies.js';
+import { cv } from './dom.js';
 import './input.js';
 
 let last = performance.now();
@@ -30,6 +31,20 @@ function dismissIntro() {
 intro.addEventListener('pointerdown', e => { e.preventDefault(); dismissIntro(); });
 addEventListener('keydown', () => dismissIntro(), { once: true });
 
+// hidden shortcut: tap the umpire three times to summon zombie mode early
+let umpTaps = [];
+cv.addEventListener('pointerdown', e => {
+  const r = cv.getBoundingClientRect();
+  const x = (e.clientX - r.left) / r.width * (cv.width / 2);  // logical coords (RES = 2)
+  const y = (e.clientY - r.top) / r.height * (cv.height / 2);
+  const u = proj(7.1, 0, COURT.netZ);
+  if (Math.abs(x - u.x) > 16 || y > u.y + 6 || y < u.y - UMP_H * u.s - 8) return;
+  const now = performance.now();
+  umpTaps = umpTaps.filter(t => now - t < 1600);
+  umpTaps.push(now);
+  if (umpTaps.length >= 3) { umpTaps = []; forceZombies(); }
+});
+
 requestAnimationFrame(frame);
 
 // exposed for in-browser sanity checks and simulated playtests