Track becomes a deck card, Departments become decks, and trains must be made up to leave, industry restrictions enforced, update display and add a new game button

src/engine/track.ts

@@ -34,7 +34,7 @@ import type {
   TrackArc,
   TurnoutOrientation,
 } from './state.ts';
-import { carsOn, coordKey, isOperationalRail, spaceOn } from './state.ts';
+import { carsOn, coordKey, isLockedByWork, isOperationalRail, spaceOn } from './state.ts';
 
 // ---------------------------------------------------------------------------
 // Ports and geometry
@@ -357,6 +357,12 @@ export function reachableDestinations(
 
     if (!hasPort(card, node.entry)) continue;
 
+    // §9.3 — a locked industry may not be occupied OR MOVED ON. Losing Operational Rail status only
+    // stops a train FINISHING here; a turnout is not Operational Rail either and trains run through
+    // one all day. Without this a crew rolled straight over a locked industry, and coupled the cars
+    // spotted on it on the way past — the two things the safety lockout exists to prevent.
+    if (isLockedByWork(card)) continue;
+
     // Mandatory coupling. Rejecting rather than truncating is deliberate: a move that would
     // overfill the tray is illegal, not a move that picks up fewer cars.
     const couples = [...node.couples, ...carsOn(card)];