Pace was the missing dial, and the reachability test finally exists

"there are still balls which are basically not reachable with auto run..
please recheck" — and, asked twice: "did you write tests for the last issues
we encountered?" The straight answer: no. The unreachable-balls issue only
ever had config assertions, which is why it came back twice.

Pace is the ladder's fourth dial. Width alone never fixed reachability
because the returns left at ~27 m/s, crossing to the baseline in ~0.6s — less
than auto-run needs from the far corner. matchOppPace 0.78 puts opponent one
at ~20 m/s (measured live: twelve returns, 20.0-20.7), a quarter more flight
time, and matchOppPacePer hands it back per rung.

The vignette deepens: dmg x 0.8, cap 0.85, and the clean centre shrinks with
damage instead of only the rim darkening.

And the reachability regression the issue always deserved: a headless 90s
autopilot soak asserting at least 10 returns sampled and at most 15% that
never came within volley reach. Sabotage-verified. Its honest limit is
recorded in PROJECT.md: the autopilot attends perfectly and taps
frame-precisely, so it out-covers a human — it is a floor against
catastrophic regressions, not a proxy for the thumb. Oliver's playtest stays
the real gate.

46 tests, 15 seeds clean.

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

src/render.js

@@ -1971,9 +1971,12 @@ export function render() {
     const dmg = 1 - Math.max(0, G.hp) / (G.hpMax || 1);
     const pulse = G.hurtFlash > 0 ? Math.min(1, G.hurtFlash / 0.3) * 0.3 : 0;
     if (dmg > 0 || pulse > 0) {
-      const a = Math.min(0.72, dmg * 0.5 + pulse);
-      const g = ctx.createRadialGradient(W / 2, H / 2, Math.min(W, H) * (0.52 - dmg * 0.14),
-                                         W / 2, H / 2, Math.max(W, H) * 0.74);
+      // dmg * 0.8: at half health the frame is unmistakably bloodied, at 1 hp it closes in hard
+      // ("the vignette can get more pronounced") — the inner radius tightens with damage too, so
+      // deep wounds shrink the clean centre instead of only darkening the rim
+      const a = Math.min(0.85, dmg * 0.8 + pulse);
+      const g = ctx.createRadialGradient(W / 2, H / 2, Math.min(W, H) * (0.5 - dmg * 0.22),
+                                         W / 2, H / 2, Math.max(W, H) * 0.7);
       g.addColorStop(0, 'rgba(120,8,12,0)');
       g.addColorStop(1, `rgba(120,8,12,${a.toFixed(3)})`);
       ctx.fillStyle = g; ctx.fillRect(0, 0, W, H);