Stop the brute pulsing, and let a boss die where you can see it

The pulse was drawStatic being told a height instead of reading one. _slice.py
common-scales a sheet, so a crouched frame is genuinely shorter — 211 px against
its neighbours' 224 — and forcing every frame to the same on-screen height
stretched it back up, so the body swelled and shrank once per stride. Worst on
the brute because it is the biggest and slowest. The rule already existed for the
wound stages; it now applies to every frame, once, which also settles the
shamblers and the steward (their cycles vary by up to 9%).

A chapter boss now dies in its own beat instead of under the card announcing it:
the world drops to a third speed for 1.2 s, the screen kicks, a shockwave ring
blows out through 90 extra particles and six stains, and the CHAPTER DOWN card
holds off until the pieces have landed — about 1.4 s, measured.

Cards can hold off in general now (`wait`). First cut only delayed the card's
countdown while still drawing it, which is worse than no delay: caught it in a
screenshot before it shipped.

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

config.js

@@ -111,6 +111,12 @@ export const TUNE = {
   bossSalvoGap: 0.42, // s between the shots of one volley
   bossWind: 0.5,    // s of telegraph before a boss throws — shorter than the machine's 0.9 on purpose:
                     // he asked for a tighter reaction time, and a boss should be harder than furniture
+  bossDeathT: 0.7,  // s of GAME time the chapter card holds off after the boss dies. The card used to
+                    // land on the same frame as the kill and bury it — you never saw the thing you
+                    // spent a whole fight earning. Game time, so the slow motion below stretches it
+                    // to roughly a second and a half on the clock.
+  bossSlowT: 1.2,   // s of REAL time the world runs slow while a boss comes apart
+  bossSlowMo: 0.35, // ...and how slow
   bossShotSpeed: 15.5, // m/s a boss throws at (the machine's is machSpeed 13)
   racketEvery: 3,   // games between racket-zombie (plain opponent) spawns — was EVERY won game, which
                     // is why he read as "the boss" and why a real boss would not have stood out