v0.8.0.9 — the bot plans its switching turn, stops wasting its draws, and the engine walks each route once

The developer bot, re-measured decision by decision against the bot before it,
goes from about -0.3 revenue a game to about 4.8:

- plans the whole switching turn before its first Move (sim/switch-planner.ts),
  +2.89 over 1600 paired seeds; closes TODO #53
- takes a face-up card only if it could play it, +1.52 over 1600 seeds
- stops running Second Sections by accident in the New Train phase, +0.32
- lays track by what the district can do afterwards, +0.12 over 6400 seeds,
  run-arounds in 22 of 60 districts against 9

The engine is 2.8x faster with play proven identical: a route cache scoped to
one unchanged position, applyIntent split into prepareIntent + commitEvents,
and less allocation in exploreMoves. npm test now leaves out the bot
simulations, which run as npm run test:sim.

No rule changed; games in progress resume. Rejected candidates and the
Second Section card question are in CHANGELOG.md and TODO.md (#104-#106).

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_017nnuCv8UodHucFfx3LWEoX

package.json

@@ -1,6 +1,6 @@
 {
   "name": "station-master",
-  "version": "0.8.0.8",
+  "version": "0.8.0.9",
   "private": true,
   "type": "module",
   "description": "Station Master — a railroad operations game",
@@ -10,7 +10,9 @@
   "scripts": {
     "typecheck": "tsc --noEmit",
     "pretest": "tsc --noEmit && node scripts/build-web.ts",
-    "test": "node --test test/*.test.ts test/**/*.test.ts",
+    "test": "node --test $(ls test/*.test.ts test/**/*.test.ts | grep -v '^test/sim.test.ts$')",
+    "pretest:sim": "tsc --noEmit",
+    "test:sim": "node --test test/sim.test.ts",
     "build:web": "node scripts/build-web.ts",
     "serve:web": "node scripts/build-web.ts && npx --yes http-server dist -p 8080 -c-1",
     "deploy:web": "node scripts/deploy-web.ts",