Triple-tap the scoreboard for a sandbox

A test mode for trying the new content without playing twenty games to reach it.
Three taps on the scoreboard toggles it, three more turns it off, and a single
tap is still the miss-log overlay. Same shape as the umpire triple-tap cheat it
sits next to.

It OVERRIDES the difficulty director rather than editing it, so the wave is the
same whether you opened it in game 1 or game 40 and the run keeps running
underneath: 8 bodies, a fixed 1.15 m/s shamble, a spawn every 1.6 s, and
pickVariant pretending to be at game 20 so every body type can turn up. All four
barrel weapons sit on the rack and are topped back up each frame, because
committing a burst spends the whole tin and a sandbox that runs dry is not one.
A barrel rolls out every 14 s so the pickup itself is testable too.

The third tap must NOT toggle logShow: taps one and two already toggled it twice
and it is back where it started, so toggling again left the miss-log overlay
switched on behind you every single time.

Also records the trap that cost a debugging round getting here: index.html loads
main.js?v=N, and fetching 'main.js' does not bust that URL -- so main.js stayed
stale through a reload while every other module was fresh, and the tap handler
appeared to do nothing.

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

config.js

@@ -230,6 +230,15 @@ export const TUNE = {
   mgPelletR: 0.5,   // m of extra hit radius on a pellet: a fat round. "Bigger ball = more damage."
   dmgPelletHp: 2,   // hp a pellet takes off a body — shamblerHp is 2, so the horde gun one-shots them
   mgPickupLen: 8,   // s the machine-gun tin (4th delivery) auto-fires outside hordes
+  // ---- TEST MODE (triple-tap the scoreboard). A sandbox for trying the new content: a steady
+  // MEDIUM wave regardless of how far into a run you are, and every barrel weapon on the rack,
+  // kept topped up so nothing runs dry mid-test. It overrides the difficulty director rather than
+  // editing it — G.runGames keeps climbing underneath and the run is still a real run.
+  testZMax: 8,        // bodies on court: enough to test a crowd weapon, few enough to read
+  testZSpeed: 1.15,   // m/s shamble — medium, and FIXED (no per-game ramp)
+  testSpawnEvery: 1.6,// s between spawns
+  testLevel: 20,      // the roster level pickVariant pretends to be at, so every body type can turn up
+  testBarrelEvery: 14,// s between barrels, so the pickup itself is testable too
   // ---- THE LASER's wedge: aim and release like a serve, and a plane of light widens down the lane
   beamLen: 26,      // m it reaches — the whole court, so a lane you aim is a lane you clear
   beamW0: 0.35,     // m half-width at the racket...