Splatter: ball economy — one ball, fetch it back, no more toss-spam

The slingshot serve didn't fix the gameplay because four things were free at
once: pure-hold auto-target with predictive lead, a hardcoded 0.62 serve
quality, infinite ammo with an instant mid-rally re-toss, and a melee swish on
every single tap that cleaved the whole cluster. Perfecting the pretoss/toss
rhythm beat the game; no skill required.

The ball is scarce now. A spent ball LIES where it died (G.loose, ringed on
court) and there is no serve until it's back in your hand: walk it down
(instant, and the only reason to leave the baseline), let a boy scoop it, wait
out TUNE.looseMax, or watch a shambler swallow it — the one real punishment.
Fire rate is a positioning decision instead of a thumb-tempo one.

Also: the far backstop rebounds a ball with pace left, still lethal on the way
home and volleyable (trySwing lets P re-hit their own ball in splatter); melee
drops to nearest-one-only on a 1s cooldown; and the mid-rally re-toss is gone.
With no ball in hand the thumb-drag steers your legs instead of the reticle —
without that, walking your ball down is impossible on touch.

TUNE.looseMax is the fire-rate knob. Measured: ~4s per serve standing still,
~0.4s if you go and get it. 600 taps in 10s now yield exactly one serve.

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

state.js

@@ -45,6 +45,9 @@ export const G = {
   tinDue: false,      // the rules called for new balls — deliver at the next changeover
   pendingGame: false, // a game just ended — flash 'GAME N' when the next one arms
   aim: null,          // live two-stage serve aim {fx, fy, mag} while the thumb is down (splatter pretoss)
+  loose: false,       // splatter: {t} while your ball lies on the court — no serving until it's in your hand again
+  fetchT: 0,          // s until a ball is handed back to you (boy delivery, or fresh balls after one got eaten)
+  meleeT: 0,          // s of racket-swish cooldown left
   interlude: false,   // sudden-death duel vs the racket zombie: falsy, or {introT} while announcing
   duelLerp: 0,        // 0..1 — how far the court has returned to tennis colors for the duel
   horde: null,        // active horde wave {t, spawnT, mgT} — machine-gun racket, no serving