Finish the roster: brute wounds, the chair spectator, the last boy frames

The two that kept failing land as two-figure sheets — a dragged pole or a
held-up chair is wide enough that four to a sheet either merge into one frame or
run off the canvas whatever margin the prompt asks for. The chair spectator came
out the best of the lot (0.15-0.24 to 0.42-0.52).

Also caught x_boyrun3 and x_boyrun4 sitting at the old fidelity next to the two
frames of the same run I had already redrawn — my batch list only covered half
the cycle.

The roster now averages 0.341 inner-edge density across 111 character sprites,
against 0.237 for z_mach2. What is deliberately left alone: the chapter bosses,
the judge, the ball machine and the weapon icons — Oliver named those as the ones
that were already right.

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

render.js

@@ -155,7 +155,7 @@ export function proj(x, y, z) {
 
 // ---------------------------------------------------------------- sprites ----
 // assets/<name>.png; game falls back to code-drawn figures until sprites load.
-const SPRV = 63; // asset cache-buster — bump with main.js?v=N (see the img.src note below)
+const SPRV = 64; // asset cache-buster — bump with main.js?v=N (see the img.src note below)
 const SPR = {};
 for (const n of ['p_idle1','p_idle2','p_bounce','p_bounce2','p_toss','p_smash','p_run1','p_run2','p_run3','p_run4','p_swing1','p_swing2','p_die1','p_die2','p_die3','p_die4','p_die5',
                  'o_idle1','o_idle2','o_bounce','o_bounce2','o_toss','o_smash','o_run1','o_run2','o_swing1','o_swing2',