user card Hand becomes the action surface, the board shows the train, and a reverse stops turning it around, other bug fixes too.

TODO.md

@@ -16,6 +16,14 @@ Ordered within each section by how much it is currently costing us.
       holds 243 of which 104 are track, so every draw is diluted by 43% — precisely the pressure
       those multipliers exist to relieve. Until then, read no balance conclusion from the revenue
       numbers; they are a functionality signal only.
+- [ ] **Review the standalone replay against the site's replay viewer.** `node src/sim/replay.ts
+      --seed 1234 --out replay.html` writes a self-contained HTML file; the site instead reads JSON
+      saves from `public/replays/`. Nothing links to the standalone one and its output is gitignored,
+      so it is a developer tool that happens to look like a product feature. It carries two panels
+      the site viewer does not — the bot's decision trace ("what it chose, why, and what it passed
+      over") and the timetable — which is debugging material rather than something a player wants.
+      Decide: fold the decision trace into the JSON viewer and delete the standalone, or keep it and
+      accept that it is a tool. No action for now.
 - [ ] **The bot was partly living off an illegal placement.** Barring curves from the Running Track
       (they have no east-west road and dead-end the main) cost it districts 28.0 → 19.7 cards and
       revenue ~2.0 → 0.8. It has no plan for where a curve should go once the easy square is gone.