Back to 60fps — the 30fps cap was too noticeable

The knob stays (TUNE.fps in the T panel) for anyone who wants to trade
smoothness for battery; the pile cache and GC fixes keep their savings.

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

config.js

@@ -39,7 +39,7 @@ export const TUNE = {
   hordeRate: 2.5,   // zombies spawned per second during a horde
   mgRate: 6,        // machine-gun pellets fired per second during a horde
   mgPickupLen: 8,   // s the machine-gun tin (4th delivery) auto-fires outside hordes
-  fps: 30,          // frame cap — pixel art reads fine at 30 and it halves battery/heat; set 60 to compare
+  fps: 60,          // frame cap — 30 halves battery/heat but Oliver felt it; smoothness wins (0 = uncapped)
   runnerSpeed: 3.2, // runner ('f') speed multiplier over the shamble
   runnerVMax: 4.2,  // hard runner speed cap — the late-game ramp must stay humanly reactable
   bruteHp: 2,       // splat-quality hits (or pellets) a brute ('g') soaks before it dies