more info on train moves in history. train info added to tooltip on timetable and division map. support for multiple trains in area switching. more info on train7/8 wrt location of coach on initial train build.

src/engine/events.ts

@@ -99,7 +99,15 @@ export type GameEvent =
   | { type: 'trainHeld'; trainNumber: number; reason: string }
   /** A train whose card pays for standing still (X18 Circus) collected on it. */
   | { type: 'trainStoodStill'; trainNumber: number; where: string }
-  | { type: 'trainHighballed'; trainNumber: number; from: string; to: string }
+  /**
+   * `why` is the RULE that let it go now, not a restatement of the move.
+   *
+   * Reported from play: "some trains seem to be moving before I can switch or do other operations on
+   * them." Every departure looked identical in the history, so the one that mattered — an Expedited
+   * train leaving at the end of the Stage it arrived, with no Local Operations turn in between —
+   * read exactly like an ordinary train leaving a Stage later.
+   */
+  | { type: 'trainHighballed'; trainNumber: number; from: string; to: string; why: string }
   /**
    * `expedited` because it changes what the player must do RIGHT NOW. Q3 — an expedited train
    * departs the same Stage it arrives, so there is no Local Operations turn in which to work it;