Dev console: money, items, upgrades, free build, speed (t66)

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/sim/save.js

@@ -9,6 +9,7 @@ function serializeWorld() {
   const t16 = new Uint16Array(N);
   for (let i = 0; i < N; i++) { const v = (temp[i] + TOFF) * 16; t16[i] = v < 0 ? 0 : v > 65535 ? 65535 : v; }
   const meta = {
+    dev: devWorld, devLog: devLog.map(e => e.slice()),
     slopePhases: Array.from(slopePhase),
     v: SAVE_VERSION, seed: worldSeed, W, H, tick, surfBase, underD, shallowD, lapse, tOff: TOFF,
     saplings: saplings.map(s => [s.x, s.y, s.age, s.th, s.seed]),
@@ -32,6 +33,8 @@ function serializeWorld() {
 function deserializeWorld(meta, buffers) {
   if (meta.v !== SAVE_VERSION) throw new Error('This world was saved by an older version of the game and cannot be loaded.');
   alloc(meta.W, meta.H);
+  devWorld = meta.dev === true;
+  devLog = devWorld && Array.isArray(meta.devLog) ? meta.devLog.filter(e => Array.isArray(e) && Number.isSafeInteger(e[0]) && e[0] >= 0 && typeof e[1] === 'string').slice(-200).map(e => [e[0], e[1]]) : [];
   worldSeed = meta.seed;
   if (meta.surfBase) { surfBase = meta.surfBase; underD = meta.underD; }
   shallowD = meta.shallowD || 0; lapse = meta.lapse || 0.36;