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

TODO.md

@@ -9,6 +9,24 @@ Ordered within each section by how much it is currently costing us.
 
 ## Next
 
+- [ ] **REBALANCE, once the rules are right — deliberately deferred.** Card counts, industry counts
+      and the track mix all need a pass together, and none of them should move until the rules stop
+      moving. Standing distortions to account for when it happens: offices are doubled (Q12) and
+      industries tripled (Gap 12), both tuned when the deck held 139 cards and **no track**; it now
+      holds 243 of which 104 are track, so every draw is diluted by 43% — precisely the pressure
+      those multipliers exist to relieve. Until then, read no balance conclusion from the revenue
+      numbers; they are a functionality signal only.
+- [ ] **The bot cannot get a crew next to an industry, so Flying Switch never fires.** Industries are
+      now stub-only and the bot places 2.23 a game (was 3.84), in districts averaging under two rows
+      deep. `flyingSwitch` is exempted by name in the reachability sweep in `sim.test.ts`; deleting
+      that line is the test that this is fixed. Same root cause as the item below.
+- [ ] **The bot does not play for a run-around any more, and revenue halved.** With track in the deck
+      a run-around needs a turnout, a matching curve, straights, a second curve and a second turnout,
+      all of the right hand, arriving in a three-card hand in a usable order. The bot holds no plan
+      across turns and discards a piece it cannot use immediately: run-arounds fell 70/100 → 29/100
+      and revenue 5.80 → 2.87. Two test floors in `sim.test.ts` are pinned below the measurement as
+      break-detectors rather than targets, and say so. Do the density re-measurement above first —
+      bot weakness and deck density are currently confounded.
 - [ ] **A "load" is stored as a car, so rolling stock cannot be counted.** `outboundBox`,
       `inboundBox` and `menAtWork` all hold `RollingStock`, and `freightAgent.stockOutbound` takes a
       LOADED CAR out of the Division Yard to fill a green box. So a census of every holder comes to
@@ -242,5 +260,10 @@ target is settled and freight carries its intended share.
       card when §6.2 was written; a 26-piece supply has no hand to bound it.
 - [x] **Q11 — which way a Heavy Grade climbs.** Answered from the card: it prints "(Up)" and "Player
       sets orientation", so it is a property of the placed card, not a compass constant.
+- [x] **§6.2's reshuffle.** Implemented, and the `deckReshuffled` event it had already declared and
+      narrated — but never emitted or reduced — is now real. Not yet reached in play: solitaire
+      Campaign ends with 168.8 of 243 in the deck and four-player Campaign with 86.6, and no run of
+      any length has emptied it. It is a safety net rather than a live mechanic today, which is worth
+      knowing before tuning draw rates.
 - [x] **Q12 — Whistle Post lock-in.** Players always start at a Whistle Post; office density doubled
       instead.