Exact touchdown, the boy finishes his shift, healing announces itself, 4K heads

Five of Oliver's six (the sixth is a play-mode discussion):
- THE DOUBLE FAULTS WERE FRAME QUANTIZATION: the bounce registered a full
  integration step after true contact — ~0.75 m of travel at serve pace — so
  serves aimed half a metre safe were judged long. Classic enforces the
  service box, the match only the court, hence 'zombie tennis does not'.
  The bounce now rewinds to y=0 before anything reads the position.
  Measured in-pane: 30/40 faults on good taps before, 0/40 after (mistimed
  and smudged taps also 0/40; aimed hard serves keep their scatter risk).
  Also: the strike flick dead zone is 44 px so a smudged tap stays a tap,
  and the aim base clamps 0.18 m inside the lines — scatter, not the aim,
  is what faults.
- The mop beat holds the walk-on until the boy actually LEAVES the court
  (ordered off at beat end, 6 s cap).
- A match game win that restores blood shows the duel's WOUNDS TREATED
  popup; full-blood wins stay silent.
- The opponent walk-on card holds 4.0 s (was 2.4).
- Card heads are cut from the 4K sheets at 144 px (assets/_heads.py,
  z_<fam>head.png, HEAD_CROP stays as fallback) — the old 65 px crops were
  the 'very low res' heads.

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

src/render.js

@@ -221,7 +221,7 @@ function farB(z) {
 // Asset cache-buster — bump with main.js?v=N (see the img.src note below). EXPORTED because the
 // menu screens hang <img> tags on the same files, and two copies of this number is one copy too
 // many: the one that does not get bumped is the one that serves a cached 404.
-export const SPRV = 111;
+export const SPRV = 112;
 // The boot bar in main.js watches this. Nothing here CHANGES when things load — every sprite was
 // already requested at import — it just makes the wait visible and holds the menu back until the
 // last sheet has landed. See the onerror note below for the other half of "sometimes missing".
@@ -273,6 +273,9 @@ for (const n of ['p_idle1','p_idle2','p_bounce','p_bounce2','p_toss','p_smash','
                  // filenames typed out here (each of which is a chance to typo one and have a body
                  // vanish for a frame — the oldest bug in this file).
                  ...ZFAMS.flatMap(famFrames),
+                 // the card's 4K-cut head icons (assets/_heads.py). 'r' has no fam sheet — his
+                 // card keeps the HEAD_CROP fallback, so no file and no 404 for him.
+                 ...ZFAMS.filter(k => k !== 'r').map(k => 'z_' + k + 'head'),
                  'w_ball','w_bomb','w_triple','w_fire','w_gun', // weapon-rack icons
                  'w_beacon','w_laser','w_rocket','w_flamer',    // ...and the four that come out of a barrel
                  'z_barrel1','z_barrel2',                       // the weapon barrel, two frames so it ROLLS
@@ -1711,10 +1714,16 @@ function cardBody(c, dx) {
   // and boss names of any length, and Bangers 22 ran a long one off both edges of a phone. Measure
   // once and shrink to the band; 22 stays 22 for everything that already fit.
   // THE OPPONENT CARD CARRIES ITS HEAD (Oliver: the punchline plus a picture of his head). The
-  // icon is a straight crop out of the family's own healthy frame — config.HEAD_CROP, measured,
-  // never separate art — drawn left of the text block, which shifts right to keep the whole
-  // group centred as one. A family with no crop row degrades to the plain text card.
-  const hd = c.head && HEAD_CROP[c.head] && SPR['z_' + c.head + '1'] ? HEAD_CROP[c.head] : null;
+  // icon prefers the 4K-cut z_<fam>head.png (assets/_heads.py — the installed 224 px frames gave
+  // ~65 px heads drawn at 144 device px, which is the "very low res" he reported) and degrades
+  // to the HEAD_CROP crop of the healthy frame, then to the plain text card. Never separate art:
+  // both sources are the body already on court.
+  const headImg = c.head && SPR['z_' + c.head + 'head'];
+  const hd = headImg ? { img: headImg, w: headImg.width, h: headImg.height }
+    : c.head && HEAD_CROP[c.head] && SPR['z_' + c.head + '1']
+      ? { img: SPR['z_' + c.head + '1'], box: HEAD_CROP[c.head],
+          w: HEAD_CROP[c.head].w, h: HEAD_CROP[c.head].h }
+      : null;
   const ih = hd ? CARD_H - 14 : 0, iw = hd ? Math.round(hd.w * ih / hd.h) : 0;
   const room = W - 24 - (hd ? iw + 8 : 0);
   ctx.font = B(22);
@@ -1731,8 +1740,9 @@ function cardBody(c, dx) {
     let blockW = 0;
     for (const [t, f] of lines) { ctx.font = f; blockW = Math.max(blockW, ctx.measureText(t).width); }
     ctx.imageSmoothingEnabled = false;
-    ctx.drawImage(SPR['z_' + c.head + '1'], hd.x, hd.y, hd.w, hd.h,
-      Math.round(cx - blockW / 2 - 8 - iw), Math.round(CARD_MID - ih / 2), iw, ih);
+    const hx = Math.round(cx - blockW / 2 - 8 - iw), hy = Math.round(CARD_MID - ih / 2);
+    if (hd.box) ctx.drawImage(hd.img, hd.box.x, hd.box.y, hd.box.w, hd.box.h, hx, hy, iw, ih);
+    else ctx.drawImage(hd.img, hx, hy, iw, ih);
   }
   for (const [t, f, rel, col] of lines) { ctx.font = f; shadowText(t, cx, y + rel, col); }
   ctx.textAlign = 'center'; ctx.restore(); // the band's neighbours (flash, countdown) assume centred