Fill the rack yourself, and roll barrels out that fill it

The rack had five hardcoded slots where the index WAS the weapon, spelled out in
five places: SLOTS, slotStock, WDESC, drawRack's three parallel arrays,
deliverTin's w+1, and bare wsel === 1|2|3 / G.weapon === 4 tests across five
files. config.WEAPONS is the one table now, G.rack holds up to four {id, n} in
the order you GATHERED them, and slot 0 stays BALL. Everything reads through
slotId/slotStock/slotEntry, so nothing else knows how the rack is stored.

A fifth weapon is always allowed, per Oliver: it rides slot 0 as G.temp until
spent, then slot 0 goes back to the infinite ball. A barrel arms on the spot and
is spent quickly, so refusing it would mean a barrel you shot did nothing. And a
spent weapon LEAVES its slot -- with gathered slots, an exhausted weapon holding
one is a quarter of the rack you can never pick up into. (The old rack kept its
empties dimmed, which was right when a slot meant "BOMB goes here".)

Four new weapons, and they are all the ONE existing pellet loop. firePellet(w)
stamps the WEAPONS row onto the round -- r, dmg, hp, pierce, boom, ignite, col,
speed, life -- so the beacon cannon, flamethrower, laser and rocket needed no new
array and no new update; the break after the first body was the only thing making
a pellet single-target. All four go through the same isBoss branch, which is why
none can silently no-op on a boss the way three of five once did. Measured:
gun/beacon/laser/rocket reach past 16 m, the flamer is a ~6 m cone that ignites.

G.mgT stays the mode timer for all of them, so the eighteen !(G.mgT > 0) guards
across five files did not have to change. kind:'burst' auto-fires at its own rate
for len seconds; kind:'shot' holds the same braced stance and fires one per tap.

The barrels reuse the ball machine's shape: a rolling, shootable non-body. All
three of the registrations that fail silently are done -- blocksClear (loot must
not gate the hand-clear), the contact guard (furniture cannot eat you), and
hitR/GORE_MUL/zombieH. It scores nothing.

The pink had to become procedural. The chroma key deletes every pixel where red
and blue both beat green by 40, so a magenta drum and a magenta laser pistol both
came back as hollow outlines -- 19% and 15% solid against 50-56% for the icons in
other colours. The drum is grey steel with hazard chevrons and every bit of its
pink is the halo drawBarrel paints; the laser went electric blue. Both are solid
now (92% and 58%), and the rule is written down in HANDOFF.

tinTriples 3 -> 10 as asked, and the four dead TUNE ammo constants are gone --
nothing read them once the table landed, which is a panel value you can tune all
day for no effect.

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

main.js

@@ -5,10 +5,10 @@
 
 import { TUNE, COURT, COURTS, UMP_H, UMP_X, EATEN_RESTART } from './config.js';
 import { P, O, ball, score, G, setupPoint, selectCourt } from './state.js';
-import { update, restartRun, keyPressed, solveShot, inServeBox, inCourt, forceZombies, splatPoint, deliverTin, selectWeapon, showModal, dismissModal, startDuel, resolveInterlude, flickTarget, startBossFight, endBossFight } from './gameplay.js';
+import { update, restartRun, keyPressed, solveShot, inServeBox, inCourt, forceZombies, splatPoint, deliverTin, selectWeapon, grantWeapon, showModal, dismissModal, startDuel, resolveInterlude, flickTarget, startBossFight, endBossFight } from './gameplay.js';
 import { fitViewport, render, proj, RES } from './render.js';
 import { voice, ambient, menuMusic, menuDuck } from './audio.js';
-import { zombies, spawnZombie, spawnRacketZombie, spawnMachine, spawnChapterBoss, piles, gore, parts, pellets, extras, shots, explode, hurtPlayer, killPlayer } from './zombies.js';
+import { zombies, spawnZombie, spawnRacketZombie, spawnMachine, spawnChapterBoss, piles, gore, parts, pellets, extras, shots, explode, hurtPlayer, killPlayer , spawnBarrel } from './zombies.js';
 import { cv } from './dom.js';
 import './input.js';
 
@@ -184,6 +184,6 @@ cv.addEventListener('pointerdown', e => {
 requestAnimationFrame(frame);
 
 // exposed for in-browser sanity checks and simulated playtests
-window.T = { TUNE, ball, P, O, score, G, zombies, spawnZombie, spawnRacketZombie, spawnMachine, spawnChapterBoss, piles, gore, parts, pellets, extras, shots, explode, hurtPlayer, killPlayer, splatPoint, solveShot, inServeBox, inCourt, proj, setupPoint, forceZombies, deliverTin, selectWeapon, showModal, dismissModal, startDuel, resolveInterlude, flickTarget, startBossFight, endBossFight,
+window.T = { TUNE, ball, P, O, score, G, zombies, spawnZombie, spawnRacketZombie, spawnMachine, spawnChapterBoss, spawnBarrel, grantWeapon, piles, gore, parts, pellets, extras, shots, explode, hurtPlayer, killPlayer, splatPoint, solveShot, inServeBox, inCourt, proj, setupPoint, forceZombies, deliverTin, selectWeapon, showModal, dismissModal, startDuel, resolveInterlude, flickTarget, startBossFight, endBossFight,
   step: dt => update(dt), render, press: keyPressed,
   get phase() { return G.phase; }, set phase(v) { G.phase = v; } };