Table talk: chat woven into the chronicle

A say-box under the chronicle sends table talk to the room; messages
land in the event log itself, styled as parchment asides — banter
between the battle lines, the way it happens at a real table. Talk is
seat-authenticated, stripped and capped at 300 chars, rate-limited by
the existing bucket, persisted as chat lines in the room file (the
game replay ignores them; the room keeps its last 500), and replayed
to anyone joining. Async games get unread badges in the lobby ledger
(💬3), cleared by watching the table, and catch-up replays speak the
lines at the step where they were said. Public to the whole room, no
whispers — and no chat in hotseat, where the table talks for itself.

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

packages/server/src/store.ts

@@ -43,7 +43,14 @@ export interface CommandLine {
   at: string;
 }
 
-export type RoomLine = RoomMetaLine | JoinLine | StartLine | CommandLine;
+export interface ChatLine {
+  kind: "chat";
+  player: string;
+  text: string;
+  at: string;
+}
+
+export type RoomLine = RoomMetaLine | JoinLine | StartLine | CommandLine | ChatLine;
 
 const DATA_DIR = process.env.WIZWAR_DATA_DIR ?? join(process.cwd(), "data", "rooms");