The host clears seats and closes rooms

Two lobby-lifecycle gaps from tonight's duels (a token lost to a
client bug left an unkickable ghost seat holding a chair in VQJW).
kickSeat: the host removes any other seat from an unstarted room —
the kick is a ledger line so restarts replay it, and a kicked live
socket is set adrift with notice. abandonRoom: the host dissolves a
lobby or a finished game; every member is notified and detached, and
the ledger is archived to rooms-abandoned/ — moved, never deleted.
The lobby shows hosts a ✕ per seat and an abandon-room control.
Proven live: kick with notice, kick surviving a server restart, and
abandonment archiving its ledger.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_015RCWSTnb1KYTPyL4GmhGnF

packages/server/src/store.ts

@@ -3,7 +3,7 @@
 // command. Because the engine is deterministic, replaying a file rebuilds
 // the exact game state — server restarts lose nothing.
 
-import { appendFileSync, existsSync, mkdirSync, readdirSync, readFileSync } from "node:fs";
+import { appendFileSync, existsSync, mkdirSync, readdirSync, readFileSync, renameSync } from "node:fs";
 import { join } from "node:path";
 
 export interface RoomMetaLine {
@@ -58,7 +58,19 @@ export interface ChatLine {
   at: string;
 }
 
-export type RoomLine = RoomMetaLine | JoinLine | StartLine | CommandLine | ChatLine;
+export interface KickLine {
+  kind: "kick";
+  /** The seat the host removed from an unstarted room. */
+  name: string;
+}
+
+export interface AbandonLine {
+  kind: "abandon";
+  by: string;
+  at: string;
+}
+
+export type RoomLine = RoomMetaLine | JoinLine | StartLine | CommandLine | ChatLine | KickLine | AbandonLine;
 
 const DATA_DIR = process.env.WIZWAR_DATA_DIR ?? join(process.cwd(), "data", "rooms");
 
@@ -103,3 +115,13 @@ export function readAllRooms(): Map<string, RoomLine[]> {
   }
   return rooms;
 }
+
+/** Retire an abandoned room's ledger to the graveyard — never deleted,
+ * only moved out of the living rooms directory. */
+export function archiveRoomFile(roomId: string): void {
+  const src = join(DATA_DIR, `${roomId}.jsonl`);
+  if (!existsSync(src)) return;
+  const graveyard = join(DATA_DIR, "..", "rooms-abandoned");
+  mkdirSync(graveyard, { recursive: true });
+  renameSync(src, join(graveyard, `${roomId}.${Date.now()}.jsonl`));
+}