feat: integrate room framework and isolated subgame bundles

Complete room UI and protocol integration, move game definitions and resources behind bundle entries, publish authoritative version XML, and document single-game builds. Include all current resource changes and experiment artifacts.

cocoscreator_projects/YouleNexus/assets/scripts/LoginFlow.ts

@@ -1,3 +1,4 @@
+import {GameComposition} from './platform-login/GameComposition.ts';
 import { _decorator, Component, director } from 'cc';
 import { PlatformSession } from '../framework/platform/session.ts';
 import { NetClient, type NetClientEvents } from '../framework/net/net-client.ts';
@@ -60,7 +61,10 @@ export class LoginFlow extends Component {
 
     (async () => {
       try {
+        const composition=this.getComponent(GameComposition);
+        if(!composition)throw Error('LoginFlow requires GameComposition');
         const result = await resolveBootstrap({
+          buildIdentity:await composition.loadBuildIdentity(),
           win: window as any,
           search: window.location.search,
           fetcher: new HttpConfigFetcher(),