The template's 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

template/server/src/rooms.test.ts

@@ -378,8 +378,13 @@ describe('a seat a browser lost', () => {
 		rooms.seen(room, bo, 'home');
 		const other = rooms.create('Bo', 3);
 		rooms.seen(other.room, other.token, 'home');
-		expect(rooms.findSeats('Bo', 'home', other.room.id).seated.map((s) => s.roomId)).toEqual([other.room.id]);
-		expect(rooms.findSeats('Bo', 'home').seated.map((s) => s.roomId).sort()).toEqual([other.room.id, room.id].sort());
+		const first = rooms.findSeats('Bo', 'home', other.room.id).seated;
+		expect(first.map((s) => s.roomId)).toEqual([other.room.id]);
+		// A seat given back is noted afresh from its next use; until then its old address claims nothing.
+		const second = rooms.findSeats('Bo', 'home').seated;
+		expect(second.map((s) => s.roomId)).toEqual([room.id]);
+		rooms.seen(other.room, first[0].token, 'home');
+		rooms.seen(room, second[0].token, 'home');
 		room.over = true;
 		expect(rooms.findSeats('Bo', 'home').seated.map((s) => s.roomId)).toEqual([other.room.id]);
 	});

template/server/src/rooms.ts

@@ -797,6 +797,8 @@ export class Rooms<State, Input> {
 				const seat = room.seats.find((s) => s.id === line.id);
 				if (!seat) break;
 				seat.tokenHash = line.tokenHash;
+				// Whoever used the seat before has no claim on it by address now: the next use from the new device is noted afresh.
+				delete seat.addr;
 				seat.bot = false;
 				delete seat.standIn;
 				break;