Serve at full size, and bounce the ball with the free hand

Oliver had the diagnosis exactly right: the raised racket is part of the sprite,
so the toss and smash frames were 29% racket by height — and the game scales a
sprite off its TOTAL height, which shrank the body to fit. Measured 71% body
against the standing frame's 98%. Both are scaled so the BODY lands at standing
size and the racket now extends above the frame instead of squeezing him into it.

The bounce frames are redrawn too: racket in the left hand, right hand empty and
reaching down to the side the game actually drops the ball on, and no ball drawn
into the sprite at all.

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 = 66; // asset cache-buster — bump with main.js?v=N (see the img.src note below)
+const SPRV = 67; // 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',