Allow Distrans before the first ordinary auction bid

game/distrans-timing.ts

@@ -0,0 +1,30 @@
+type DistransAuctionContext = {
+  phase: number;
+  auction: {
+    cards: readonly unknown[];
+    index: number;
+    bid: number;
+    bidder: string | null;
+    passed: readonly string[];
+    allyPayment?: number;
+  } | null;
+  richeseAuction?: unknown;
+  currentAuctionSale?: unknown;
+};
+
+/** The printed card excludes use during a bid. Provisionally, an ordinary
+ * lot has not begun bidding until its first bid or pass. Inspection and
+ * opening the physical lot do not start that bid or change the dealt pool.
+ * Other unpaid auctions retain their separate timing boundary. */
+export function distransAuctionBlock(g: DistransAuctionContext): string | null {
+  if (g.currentAuctionSale || (!g.auction && !g.richeseAuction)) return null;
+  const lot = g.auction;
+  if (
+    g.phase === 3 && !g.richeseAuction && lot &&
+    Number.isSafeInteger(lot.index) && lot.index >= 0 &&
+    lot.index < lot.cards.length && !!lot.cards[lot.index] &&
+    lot.bid === 0 && lot.bidder === null && lot.passed.length === 0 &&
+    (lot.allyPayment ?? 0) === 0
+  ) return null;
+  return 'Distrans is unavailable after bidding starts on this lot. Finish its auction first; special-auction timing remains guarded.';
+}