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/events.ts

@@ -35,12 +35,21 @@ export type GameEvent =
        */
       toNose: boolean;
     }
-  | { type: 'carsDropped'; trayId: TrayId; at: GridCoord; stock: RollingStock[] }
+  | { type: 'carsDropped'; trayId: TrayId; at: GridCoord; stock: RollingStock[]; fromNose?: boolean }
   | { type: 'consistSorted'; trayId: TrayId; at: GridCoord; before: RollingStock[]; after: RollingStock[] }
   | { type: 'cardDrawn'; player: PlayerIndex; source: 'homeOffice' | 'department'; slot?: number; cardId: CardId }
+  /**
+   * §6.2 — the Home Office deck ran out, so the Salvage Yard and all three Department decks were
+   * collected, reshuffled, and dealt back out as a fresh deck plus three face-up Departments.
+   *
+   * The full shuffled `order` rides the event rather than being recomputed from `rngState`. A save
+   * is a seed plus the intents, so events are never serialised and the size costs nothing — and an
+   * event that states the outcome outright cannot drift from the reducer the way a re-derivation
+   * can. `rngState` still rides along so the next roll follows on.
+   */
+  | { type: 'deckReshuffled'; order: CardId[]; rngState: number }
   /** `variant` is the chosen orientation (Gap 11); it must be replayable, so it rides the event. */
   | { type: 'cardPlayed'; player: PlayerIndex; cardId: CardId; placement?: GridCoord; variant?: number }
-  | { type: 'trackLaid'; player: PlayerIndex; geometry: string; hand: string; at: GridCoord; variant: number; remaining: number }
   | { type: 'mainlineModified'; player: PlayerIndex; cardId: CardId; node: number; key: string; became?: string }
   | { type: 'redFlagsSet'; player: PlayerIndex; cardId: CardId; trayId: TrayId; node: number }
   | {
@@ -53,7 +62,6 @@ export type GameEvent =
   | { type: 'flyingSwitch'; player: PlayerIndex; cardId: CardId; trayId: TrayId; to: GridCoord; stock: RollingStock[] }
   | { type: 'officeUpgraded'; player: PlayerIndex; from: OfficeTier; to: OfficeTier }
   | { type: 'cardDiscarded'; player: PlayerIndex; cardId: CardId; toSlot: number }
-  | { type: 'deckReshuffled' }
   | { type: 'departmentRefilled'; slot: number; cardId: CardId }
   // -- freight agent
   | { type: 'stockToOutbound'; player: PlayerIndex; at: GridCoord; stock: RollingStock }