feat(games): allow admins to play against themselves

Skip the duplicate-player check when the joining user has the admin
role, so admins can test games solo by joining their own room as both
players.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

api/src/games/RoomManager.ts

@@ -33,7 +33,7 @@ export class RoomManager {
         return { ok: true, roomId: id };
     }
 
-    joinRoom(roomId: string, playerId: string, as: "player" | "spectator"): JoinResult {
+    joinRoom(roomId: string, playerId: string, as: "player" | "spectator", role?: string): JoinResult {
         const room = this.rooms.get(roomId);
         if (!room) return { ok: false, error: "Room not found" };
 
@@ -46,7 +46,7 @@ export class RoomManager {
 
         const plugin = gameRegistry.get(room.gameSlug)!;
         if (room.players.length >= plugin.maxPlayers) return { ok: false, error: "Room is full" };
-        if (room.players.includes(playerId)) return { ok: true, started: room.status === "playing" };
+        if (room.players.includes(playerId) && role !== "admin") return { ok: true, started: room.status === "playing" };
 
         room.players.push(playerId);
 

api/src/games/ws-handler.ts

@@ -7,6 +7,7 @@ export const roomManager = new RoomManager();
 interface WsContext {
     playerId: string;
     username: string;
+    role: string;
     send: (data: string) => void;
     subscribe: (channel: string) => void;
     unsubscribe: (channel: string) => void;
@@ -29,7 +30,7 @@ export function handleGameMessage(msg: GameWsClientMessage, ctx: WsContext): voi
         }
 
         case "JOIN_ROOM": {
-            const result = roomManager.joinRoom(msg.roomId, ctx.playerId, msg.as);
+            const result = roomManager.joinRoom(msg.roomId, ctx.playerId, msg.as, ctx.role);
             if (!result.ok) {
                 ctx.send(JSON.stringify({ type: "ERROR", message: result.error }));
                 return;

api/src/server.ts

@@ -202,6 +202,7 @@ export async function createWebServer(config: WebServerConfig = {}): Promise<Web
                         handleGameMessage(parsed.data as any, {
                             playerId: sessionData.discordId,
                             username: sessionData.username,
+                            role: sessionData.role,
                             send: (data) => ws.send(data),
                             subscribe: (channel) => ws.subscribe(channel),
                             unsubscribe: (channel) => ws.unsubscribe(channel),