A seat given a new token loses its address note: whoever used it before has no claim on it by address, and the next use from the new device is noted afresh

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01CCLa2PaEeCj8njQZSWGqHx

packages/server/src/rooms.ts

@@ -352,6 +352,8 @@ export function reseat(room: Room, name: PlayerId): { token: string; returned?:
   if (!personSeat(room, name)) return { error: "no person sits in that seat" };
   const token = randomBytes(16).toString("hex");
   const returned = seatToPerson(room, name, hashToken(token));
+  // Whoever used the seat before has no claim on it by address now: the next use from the new device is noted afresh.
+  room.addrs.delete(name);
   appendLine(room.id, { kind: "reseat", name, tokenHash: hashToken(token), at: new Date().toISOString() });
   // A phrase minted with the old token would hand over a seat that no longer answers to it.
   for (const [code, t] of transfers) if (t.roomId === room.id && t.name === name) transfers.delete(code);
@@ -1010,6 +1012,7 @@ function rebuildRoom(id: string, lines: RoomLine[]): Room | null {
       room.colorChoices.delete(line.name);
     } else if (line.kind === "reseat") {
       if (personSeat(room, line.name)) seatToPerson(room, line.name, line.tokenHash);
+      room.addrs.delete(line.name);
     } else if (line.kind === "seen") {
       room.addrs.set(line.name, line.addr);
     } else if (line.kind === "standIn") {