Gallery talk, the keeper's bell, rematches, seats that travel by phrase, and seats doubted before dropped

Brought over from the game kit, where they were ported from Wiz-War. The
host may let the Peanut Gallery talk; a watcher signs a name no seat
holds. A seated wizard may challenge Kestrel, the keeper: a seat is held,
the call rings Sentry once per table, and the lobby says what hour it is
where the keeper lives. A finished table may call for a rematch with the
same company and bots, seats held. Transfer seat mints four words good
for ten minutes and one use; the hall claims them. The hall forgets a
held seat only on the second refusal in a row.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_0141G6xqLeNRYEtviLWSB5Up

deploy/waving-hands.service

@@ -7,6 +7,8 @@ Type=simple
 User=waving-hands
 WorkingDirectory=/opt/waving-hands/app/server
 Environment=PORT=8788
+Environment=KEEPER=Kestrel
+Environment=KEEPER_TZ=America/New_York
 # Caddy terminates TLS; the plaintext port must not face the internet.
 Environment=HOST=127.0.0.1
 Environment=WH_DATA_DIR=/var/lib/waving-hands/rooms