Two-player decks shed LIFESAVER, as the card itself instructs

"Not applicable in a 2-player game." — the card face. New games deal
from deck revision 2, which removes it when exactly two wizards sit
down; three or more keep it. The revision travels in GameConfig and
the persisted start line, and stored games without one replay against
the original build — changing an existing game's deck composition
would scramble its deterministic replay. Test pins all three cases:
removed at two, present at three, present in legacy two-player games.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

packages/server/src/rooms.ts

@@ -157,7 +157,7 @@ export function pickColor(room: Room, playerId: PlayerId, color: number): string
   return null;
 }
 
-function startInMemory(room: Room, expansion: boolean, colors?: number[]): { events: GameEvent[] } | { error: string } {
+function startInMemory(room: Room, expansion: boolean, colors?: number[], deckRev?: number): { events: GameEvent[] } | { error: string } {
   const n = room.players.length;
   if (n < 2 || n > 6) return { error: "supported player counts: 2 to 6" };
   const { state, events } = createGame({
@@ -165,6 +165,7 @@ function startInMemory(room: Room, expansion: boolean, colors?: number[]): { eve
     seed: room.seed,
     sets: expansion ? ["basic", "expansion1"] : ["basic"],
     ...(colors ? { colors } : {}),
+    ...(deckRev ? { deckRev } : {}),
   });
   room.expansion = expansion;
   room.state = state;
@@ -175,9 +176,9 @@ function startInMemory(room: Room, expansion: boolean, colors?: number[]): { eve
 export function startGame(room: Room, expansion: boolean): { events: GameEvent[] } | { error: string } {
   if (room.state) return { error: "already started" };
   const colors = resolveColors(room);
-  const result = startInMemory(room, expansion, colors);
+  const result = startInMemory(room, expansion, colors, 2);
   if ("error" in result) return result;
-  appendLine(room.id, { kind: "start", expansion, colors });
+  appendLine(room.id, { kind: "start", expansion, colors, deckRev: 2 });
   recordRoom(room);
   return result;
 }
@@ -396,7 +397,7 @@ export function loadPersistedRooms(): void {
           room.players.push(line.name);
           room.tokens.set(line.name, joinHash);
         } else if (line.kind === "start") {
-          const r = startInMemory(room, line.expansion, line.colors);
+          const r = startInMemory(room, line.expansion, line.colors, line.deckRev);
           if ("error" in r) throw new Error(`replay start failed: ${r.error}`);
         } else if (line.kind === "command") {
           if (!room.state) throw new Error("command before start in log");