Fix the serve deadlock, give the mop boy a job, align net and umpire

The freeze first: G.mgT only counted down inside `G.phase === 'rally'`, so
anything that moved the phase mid-burst — a scheduled duel calling setupPoint —
stranded it above zero forever. mgT > 0 is one of keyPressed's early returns, so
no tap could serve again, and the yellow shape over the player's head was
drawMgRacket's muzzle flash still being drawn. Fixed at the root (the clock ticks
in every phase, only the pellets are gated on rally) and semantically: starting a
duel cancels any burst, because the duel is tennis.

The mop boy now does an actual round: walk to the biggest nearby stain, stand on
it and push the mop while the cycle animates in place, scrub it out, move to the
next, then leave. Gore fades ~3.5x faster while he is stopped and working than
when walking past, so the stain dies under him instead of fading as he drifts by.
boyMaxJobs caps the round so a kill streak can't employ him forever.

Applause: the clip is 4.16s and always plays in full, but every cheer() passed a
shorter beat, so the stand sat down while it was still audible. Floored at the
clip length. New, much bolder clap frame — the re-roll came back brighter and
bluer, which would have flashed the whole stand, so it is colour-matched to frame
one per channel on mean and sd before quantising.

Net and umpire were both wrong since forever: netW was the singles-stick width
(10.06) against a court drawn to the doubles lines, so the net stopped 0.46m
short each side; the chair's near legs stood 0.45m inside the sideline. Both now
sit exactly on the doubles line.

26-game soak clean, no stalls. Serve returns 134/150 = 89.3% +/-2.5% with the
wider net (the bar is inside one sigma), 30 human-tapped points = 50 hits /
0 whiffs.

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

config.js

@@ -32,6 +32,8 @@ export const TUNE = {
   zMaxCap: 14,      // absolute shambler cap
   changeoverT: 5.0, // s the changeover breather lasts (after odd games, as the rules demand)
   boyMopSpeed: 2.2, // m/s a MOPPING ball boy crosses at (a fetching one still sprints at 7.5)
+  boyMopDwell: 1.8, // s he stands on a stain pushing the mop before moving to the next one
+  boyMaxJobs: 4,    // stains one boy will clean in a round — a kill streak must not employ him forever
   boyStride: 0.28,  // m of travel per animation frame. Frames are driven by DISTANCE, not time, so
                     // the feet cannot slide: change a boy's speed and his legs keep up on their own.
   gameBeatT: 1.6,   // s the game-end beat lasts on even (non-changeover) games
@@ -109,6 +111,11 @@ export const TUNE = {
 // the death animation's timeline, in seconds of G.eatenT. A: thrash · B: you burst into gore
 // · C: the summary fades in. The restart tap is gated past the whole thing so a panic tap
 // during the burst can't skip it.
+// assets/audio/tennis-applaus.wav runs 4.16s and always plays in full, so the crowd must keep
+// clapping at least that long — every cheer() call was passing a shorter beat, which left the
+// stand sitting back down while the applause was still audible.
+export const APPLAUSE_T = 4.2;
+
 export const EATEN_BURST = 0.5, EATEN_SUMMARY = 1.6, EATEN_RESTART = 2.2;
 
 // UI accent colours, one place so the whole HUD can be re-tuned at once. Deliberately
@@ -117,7 +124,10 @@ export const EATEN_BURST = 0.5, EATEN_SUMMARY = 1.6, EATEN_RESTART = 2.2;
 export const UI = { hot: '#d9705f', warm: '#e0cc72', pick: '#cbd06a', cream: '#e8e8dc',
                     dim: '#8fa0b8', bad: '#a34a42', ball: '#dbe063' };
 
-export const COURT = { L: 23.77, W: 8.23, dblW: 10.97, netZ: 11.885, netH: 0.914, netW: 10.06 };
+// netW was the singles-stick width (10.06) while the court is drawn to the DOUBLES lines, so the
+// net stopped 0.46 m short of each sideline and visibly failed to meet the court edge. The posts
+// now stand exactly on the doubles sidelines.
+export const COURT = { L: 23.77, W: 8.23, dblW: 10.97, netZ: 11.885, netH: 0.914, netW: 10.97 };
 COURT.svcFar = COURT.netZ - 6.4;   // far service line
 COURT.svcNear = COURT.netZ + 6.4;  // near service line
 
@@ -128,7 +138,10 @@ export const BOY_H = 1.5; // was 1.2 — the mopping boy read as a distant speck
 // waiting 8s for him to walk into shot is dead time); a fetching boy sprints in from further out.
 export const BOY_ENTER = { mop: 9.5, run: 13 };
 export const UMP_H = 3.0;
-export const UMP_X = 5.6; // chair right beside the doubles line — x 7.1 projected off-screen in portrait
+// The chair is 1.12 m wide as drawn (x_ump is 42x112 at UMP_H 3.0), so at 5.6 its near legs stood
+// 0.45 m INSIDE the doubles line, on the court. 6.05 puts them exactly on the line; anything much
+// beyond ~6.3 clips the right edge of the portrait viewport (7.1 was fully off-screen).
+export const UMP_X = 6.05;
 
 // contact rules: outside this height band the ball can't be hit (below = it's past you)
 export const CONTACT = { minY: 0.24, maxY: 2.3 };