Fix caching, Limits placement, and explain the board better

src/sim/replay.ts

@@ -35,7 +35,7 @@ export type { CellView, DivisionView, FacilityView, Frame, Decision, TrainChip }
 export { cardName, describeIntent, snapshot } from './view.ts';
 import type { Frame } from './view.ts';
 import type { Decision } from './view.ts';
-import { cardName, describeDecision, snapshot } from './view.ts';
+import { cardName, describeDecision, snapshot, trainName } from './view.ts';
 
 // ---------------------------------------------------------------------------
 // Frame shape — only what the viewer draws
@@ -61,7 +61,10 @@ export function record(seed: number, length: GameLength, maxSteps = 100_000): Re
   };
   const s = createGame({ id: `replay-${seed}`, seed, config, playerNames: ['player'] });
   const frames: Frame[] = [];
-  const narrateCtx = { cardName: (id: string) => cardName(s, id) };
+  const narrateCtx = {
+    cardName: (id: string) => cardName(s, id),
+    trainName: (id: string) => trainName(s, id),
+  };
 
   // Tracks whether a phase did anything, so an empty one can say so rather than ending silently.
   let didSomething = false;