The keeper can bring back a seat a browser lost: a new token on the ledger, the old one refused, and a link that carries it in the fragment, minted by hnefatafl-reseat.sh through a /keeper door Caddy does not proxy and that turns away anything Caddy forwarded; the join page takes a linked seat only once the server accepts it and never over a seat this browser holds that still opens, a spectator at a game in play is told both ways back, the hall asks before forgetting a game in play, and the server's tests now run with the rest

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01MbtUPJ24P6vc6tE1x6RS3m

src/lib/components/Hall.svelte

@@ -146,7 +146,14 @@
 		if (c) void goto(`/join/${c}`);
 	}
 
+	/** A game in play asks before it is forgotten: this browser may be the only thing that holds the seat. */
+	let forgetting = $state<string | null>(null);
 	function forget(roomId: string) {
+		if (!games[roomId]?.over && forgetting !== roomId) {
+			forgetting = roomId;
+			return;
+		}
+		forgetting = null;
 		forgetSeat(roomId);
 		seats = allSeats();
 	}
@@ -253,7 +260,11 @@
 						<span class="ledger-code">{held.roomId}</span>
 						<span class="ledger-info">{status(held)}{#if unread(held) > 0} · <span class="talk-new">{unread(held)} new {unread(held) === 1 ? 'line' : 'lines'} of talk</span>{/if}</span>
 					</a>
-					<button type="button" class="dismiss" title="forget this game" onclick={() => forget(held.roomId)}>×</button>
+					{#if forgetting === held.roomId}
+						<span class="forget-ask">This browser may be all that holds your seat. <button type="button" class="quiet" onclick={() => forget(held.roomId)}>Forget it</button> <button type="button" class="quiet" onclick={() => (forgetting = null)}>Keep it</button></span>
+					{:else}
+						<button type="button" class="dismiss" title="forget this game" onclick={() => forget(held.roomId)}>×</button>
+					{/if}
 				</div>
 			{/each}
 			{#if reports.length}
@@ -478,6 +489,11 @@
 		background: rgba(240, 165, 58, 0.08);
 	}
 
+	.forget-ask {
+		font-size: 0.85em;
+		flex: none;
+	}
+
 	.ledger-row.your-move .ledger-info {
 		color: var(--ember);
 	}