Aim the ball at the chest, and stop lobbing at a net that isn't there

THE BALL WAS SOLVED TO THE GROUND. solveShot's terminal height was a hardcoded
0.08 — ball-on-the-grass — so a splatter serve came down past the shambler and
registered at the ankles however the mark was drawn. It now takes an arrival
height, and a lane shot aims at the body: zombieH x Z_CHEST, scaled off the
same height table render draws with, so a brute is struck on the brute rather
than at the height a shambler's chest happens to be. Measured at the frame the
wound registers: shambler 1.11 m of 1.8, brute 1.64 m of 2.7, and an empty lane
still lands on the grass. The aim mark reads the same `ty`, so mark, arc end
and impact are now one point instead of three guesses.

AND A BUG FOUND ON THE WAY. The net-clearing loop ran for shots that never
reach the net. A shambler on your own side sits short of the tape, so `tN` is
still positive — the net is ahead in the direction of travel, the ball simply
lands first — the height test there is far below the tape, and the loop spent
all twelve cuts. Every same-side shot left the racket at 28% of nominal pace as
a slow loop. That is exactly the shot that needs to be fast: those are the ones
about to eat you. Guarded on the shot actually crossing the net, in serveArc
and in doHit's copy. Flight time to a body at z=16 drops 0.71 s -> 0.20 s.

THIS ONE IS A FEEL CHANGE YOU DID NOT ASK FOR — near shots are now fast and
flat where they used to loop. Say if you want the lob back.

Tennis and the duel still serve into the box, far-side shots still clear the
tape, 900 frames of splatter render clean.

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

config.js

@@ -333,6 +333,17 @@ export const BOSS_ART = [
 
 export const MACH_H = 1.55; // was 1.15 — waist high read as a prop you could ignore. Still furniture
                             // (a body is PLAYER_H 1.88), but big enough to be a thing on the court.
+
+// Drawn height of a body on the far side, by variant. render draws to it AND the serve aims at a
+// fraction of it, so the two cannot drift — a shot at a brute has to arrive at the brute's chest,
+// not at the height a shambler's chest happens to be.
+export const zombieH = zb => zb.variant === 'g' ? 2.7 : zb.variant === 'd' ? 2.15
+  : zb.variant === 'r' ? 1.85 : zb.variant === 'm' ? MACH_H
+  : zb.variant === 'B' ? 1.8 * (zb.scale || 1.5) : 1.8;
+// Where on that body the ball is aimed, and where the aim mark is drawn. Solving the shot to the
+// GROUND under a shambler meant the ball came down past it and struck at the ankles — the wound is
+// on the torso, so the ball should arrive there.
+export const Z_CHEST = 0.58;
 export const BOY_H = 1.5; // was 1.2 — the mopping boy read as a distant speck at that scale
 // how far off-court a boy starts. The mop boy comes in from just off-screen (he is slow, and
 // waiting 8s for him to walk into shot is dead time); a fetching boy sprints in from further out.