more fixes and tweaks

src/engine/advance.ts

@@ -35,7 +35,7 @@ import type { Direction } from './content.ts';
 import type { GameEvent } from './events.ts';
 import { acceptsCar, areaOf } from './apply.ts';
 import { legalActions } from './legal.ts';
-import type { CrewTray, DivisionNode, GameState, PlayerIndex, TrayId } from './state.ts';
+import type { CrewTray, DivisionNode, GameState, PlayerIndex, RollingStock, TrayId } from './state.ts';
 import { coordKey, freshTurn, totalRevenue } from './state.ts';
 
 export type AdvanceResult = {
@@ -630,7 +630,7 @@ function arriveAtOffice(
       });
       return 'moved';
     }
-    collide(s, owner, [id], events, 'no free A/D track');
+    collide(s, owner, [id], events, 'no free A/D track', 'the Office');
     return 'moved';
   }
 
@@ -647,7 +647,7 @@ function arriveAtOffice(
   // is not expecting them (§A.4), so this is a collision too, not a coupling.
   const officeCard = area.grid.get(coordKey(area.officeCoord));
   if (officeCard && officeCard.standing.length > 0) {
-    collide(s, owner, [id], events, 'cars fouling the Running Track');
+    collide(s, owner, [id], events, 'cars fouling the Running Track', 'the Running Track');
     return 'moved';
   }
 
@@ -672,10 +672,22 @@ function collide(
   trains: TrayId[],
   events: GameEvent[],
   reason: string,
+  where = 'the Office',
 ): void {
+  // Record WHAT was lost before removing it. The log said only "COLLISION: NO FREE A/D TRACK", so a
+  // player could see the 5 points go without learning which train had just been written off, or
+  // what it was carrying.
+  const lost: { label: string; consist: RollingStock[] }[] = [];
   for (const id of trains) {
     const tray = s.trays.get(id);
     if (!tray) continue;
+    lost.push({
+      label:
+        tray.trainNumber === null
+          ? 'the local crew'
+          : `Train ${tray.trainIsExtra ? 'X' : ''}${tray.trainNumber}`,
+      consist: [...tray.consist],
+    });
     // Gap 2c — engines and cabooses return to the Division Yard, everything else to Classification.
     for (const car of tray.consist) {
       if (car.type === 'caboose') s.yards.divisionYard.push(car);
@@ -685,6 +697,10 @@ function collide(
     s.freeTrays.push(id);
   }
 
+  if (lost.length > 0) {
+    events.push({ type: 'trainsDestroyed', player: faultPlayer, trains: lost, reason, where });
+  }
+
   s.collisionsToday += 1;
   const player = s.players[faultPlayer];
   if (player) {