fix(signalr): skip negotiate, connect WebSockets-only (CDN 404s the POST)

WCDN rejects the SignalR negotiate POST (404, wcdn-nfc-reason: Http_Method), so
the hub never connects and online matchmaking never starts. Connect directly via
WebSockets with skipNegotiation so there's no negotiate POST; the JWT rides the
?access_token query the server already accepts for /hub. The proper fix remains
bypassing the CDN for api.bargevasat.ir.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/lib/online/signalr-service.ts

@@ -141,7 +141,15 @@ export class SignalrService implements OnlineService {
   private async connect(): Promise<void> {
     if (this.conn || !this.token) return;
     const conn = new signalR.HubConnectionBuilder()
-      .withUrl(`${SERVER}/hub/game`, { accessTokenFactory: () => this.token ?? "" })
+      // Connect straight over WebSockets and SKIP the negotiate POST — some CDNs
+      // (WCDN) 404 the negotiate POST by method. The JWT rides the WS query
+      // string (server reads ?access_token for /hub). Real fix is to bypass the
+      // CDN for api.bargevasat.ir; this is a best-effort fallback.
+      .withUrl(`${SERVER}/hub/game`, {
+        accessTokenFactory: () => this.token ?? "",
+        skipNegotiation: true,
+        transport: signalR.HttpTransportType.WebSockets,
+      })
       .withAutomaticReconnect()
       .configureLogging(signalR.LogLevel.Warning)
       .build();