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

docs/rules/open-questions.md

@@ -245,9 +245,15 @@ is an explicit mechanic that can't be tuned without a number.
 
 1. **The Home Office deck is a single deck containing every card type.** §4.5–4.6 shuffles one deck,
    deals three cards to each player, then turns three cards face-up beside it as the Department
-   decks. §6.2's reshuffle sweeps the Salvage Yard *and* all three Department decks back into it. The
-   Departments are therefore three face-up market slots fed from the one deck, not decks with their
-   own contents.
+   decks. §6.2's reshuffle sweeps the Salvage Yard *and* all three Department decks back into it.
+
+   > **CORRECTED.** This finding went on to conclude the Departments were "three face-up market
+   > slots fed from the one deck, not decks with their own contents". They are **decks**: shared by
+   > every player, discarded onto and drawn from. §6.2 says a discard goes "face up ON TOP of one of
+   > the three Department slots" and a draw takes "the TOP face-up card" — both phrases only mean
+   > something over a pile. Modelling them as one-card slots made a discard OVERWRITE whatever was
+   > face up there, destroying a card from a closed deck, and removed the strategy in choosing which
+   > Department to use.
 2. **A player's Office area is a card grid, not a row.** §9 permits a Modifier "adjacent (on any of
    the nine nearby spots)" — a 3×3 neighbourhood. Appendix A's diagrams show a 2×3 grid: bottom row
    D/E/F is the Running Track with the Depot as Office at E, top row A/B/C is Secondary Track with a

docs/rules/rules-v0.2.md

@@ -597,8 +597,16 @@ upgrade must never disturb a connection.
 
 ### 12.1 The Home Office deck — 52 cards
 
-A single deck containing every card type. The three Department slots are face-up market slots fed
-from it, not decks with their own contents (§2.6).
+> **SUPERSEDED by the recovered design** (`docs/Deck cards2.xlsx`). The counts below are the invented
+> placeholder and are kept only as the record of what was assumed before the real sheet turned up.
+> The deck is **243 cards**, of which **104 are track**; see `content.ts` and
+> `implications.md` §4a.
+
+A single deck containing every card type. The three Departments are shared **decks**, not single
+face-up slots: a discard is placed on top of whichever one the player chooses, and only the top card
+may ever be drawn (§2.6, §6.2). When the Home Office deck runs out, the Salvage Yard and all three
+Department decks are collected, reshuffled, and dealt back out as a deck plus three fresh face-up
+Departments.
 
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