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/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 **SUPERSEDED by the recovered design** (`docs/Deck cards2.xlsx`).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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