/** Run inside the Creator Game View through MCP. Synthetic state; no login or business packets. */
export async function verifyLobbyMenuPreview() {
  const engine=await globalThis.System.import('cc');
  const modules=Array.from(globalThis.System.entries()).map(([,module])=>module);
  const exported=name=>{const module=modules.find(m=>m[name]);if(!module)throw Error(`Missing preview export ${name}`);return module[name];};
  const LobbyPanel=exported('LobbyPanel'),createRemoteConfig=exported('createRemoteConfig');
  const resolveLobbyPolicy=exported('resolveLobbyPolicy'),resolveLobbyMenuConfig=exported('resolveLobbyMenuConfig');
  const service=engine.director.getScene().getChildByName('PlatformServices');
  const owner=service.getComponent('PlatformStartup'),assets=service.getComponent('LobbyAssets');
  owner.unsubscribe?.();owner.runtime?.stop();owner.panel?.dispose();owner.panel=null;
  await new Promise((resolve,reject)=>engine.director.loadScene('PlatformLobby',error=>error?reject(error):resolve()));
  const canvas=engine.director.getScene().getChildByName('Canvas');
  const popup=new engine.Node('MenuVerificationPopup');popup.parent=canvas;popup.layer=canvas.layer;
  popup.addComponent(engine.UITransform).setContentSize(1600,720);
  const player={playerid:7,nickname:'菜单接线验证',avatar:'',sex:0,bean:123456789,roomcard:1234,taskstate:1,advanced:0,score:9,sign:'验证账号',ip:'127.0.0.1'};
  const state={app:{phase:'logged-in'},room:{kind:'outside'},players:{selfPlayerId:7,entities:{7:player}}};
  const actions=[],tips=[],checks=[];
  const assert=(condition,message)=>{if(!condition)throw Error(message);checks.push(message);};
  const config=owner.config;
  const make=(data,context={versionState:0,launchMode:0})=>{
    const remote=createRemoteConfig({gameNoticeShow:-1,...data},config.identity);
    const panel=new LobbyPanel(canvas,popup,assets,config,resolveLobbyPolicy(remote),state,text=>tips.push(text),
      ()=>actions.push('logout'),()=>({errorCode:1}),()=>actions.push('url'),resolveLobbyMenuConfig(remote),context,action=>actions.push(action),()=>{},(name,data)=>owner.callNative(name,data),{request:()=>actions.push('vip-query'),join:()=>actions.push('vip-join'),describe:()=> '测试玩法'});
    popup.setSiblingIndex(canvas.children.length-1);
    return panel;
  };
  const click=(panel,id)=>panel.menuNodes.get(id).emit(engine.Button.EventType.CLICK);
  let panel=make({rankList:1,cdKey:2,hideTaskBtn:1,miniPro:1,hideRoomCard:2});
  assert(!panel.menuNodes.get(17).activeInHierarchy&&!panel.taskTip.activeInHierarchy,'hidden task also hides child red dot');
  assert(!panel.menuNodes.get(14).activeInHierarchy,'miniPro hides share');
  assert(!panel.menuNodes.get(10).active&& !panel.menuNodes.get(3161).active,'hideRoomCard hides purchase and number');
  assert(panel.menuNodes.get(3264).active&&panel.menuNodes.get(3233).active,'cdKey and rank are visible');
  assert(!panel.menuNodes.get(3256).active,'phone binding stays hidden');
  click(panel,17);click(panel,14);click(panel,10);
  assert(actions.length===0,'hidden buttons cannot dispatch events');
  click(panel,3264);assert(actions.at(-1)==='cdkey','cdkey dispatches named business event');
  click(panel,7);assert(panel.modalKind==='settings','settings button opens existing prefab');
  const before=actions.length;click(panel,3264);assert(actions.length===before,'modal blocks underlying menu');
  panel.close();click(panel,9);assert(panel.modalKind==='profile','avatar opens existing profile prefab');
  panel.close();click(panel,12);assert(panel.modalKind==='join','join button opens existing join prefab');panel.close();
  click(panel,3120);assert(panel.noticeMenu.getChildByPath('group-95').active,'more button opens tray');
  assert(panel.menuNodes.get(604).active&&!panel.menuNodes.get(235).active,'tray applies rank and miniPro policy');
  const trayBackground=panel.menuNodes.get(3121),trayUI=trayBackground.getComponent(engine.UITransform);
  assert(trayBackground.position.x-trayUI.width*trayUI.anchorX===200-640,'tray resize preserves source left edge');
  click(panel,5);assert(panel.modalKind==='notice','tray notice opens existing notice prefab');panel.close();
  panel.render({...state,app:{phase:'reconnecting'}});const count=actions.length;click(panel,3264);
  assert(actions.length===count,'reconnecting blocks menu action');
  panel.dispose();
  panel=make({agentmode:1,androidPay:1,rankList:1,cdKey:2});
  assert(panel.menuNodes.get(10).active&&panel.menuNodes.get(509).active,'androidPay restores both purchase buttons');
  assert(panel.taskTip.activeInHierarchy&&panel.taskTip===panel.menuNodes.get(17).getChildByName('Tip'),'red dot is the authored Tip child');
  const badge=panel.taskTip;
  panel.render({...state,players:{...state.players,entities:{7:{...player,taskstate:0}}}});
  assert(!badge.active,'taskstate clears badge');panel.render(state);
  assert(panel.taskTip===badge&&badge.active,'rerender reuses the authored Tip sprite');
  for(const id of [10,286,287,3161]){click(panel,id);assert(actions.at(-1)==='buy-roomcard',`roomcard hit region ${id}`);}
  for(const id of [508,509,496,3162]){click(panel,id);assert(actions.at(-1)==='buy-bean',`bean hit region ${id}`);}
  assert(tips.length===0,`existing actions run without errors: ${tips.join(';')}`);
  panel.dispose();
  panel=make({cdKey:2},{versionState:1,launchMode:0});
  assert(!panel.menuNodes.get(3233).active&&!panel.menuNodes.get(14).active,'review mode hides rank and share');
  assert(panel.menuNodes.get(3264).active,'cdKey applies after review branch');panel.dispose();
  panel=make({agentmode:1,androidPay:1,rankList:1,cdKey:2});
  click(panel,14);assert(panel.modalKind==='share','share UI opens without a native host');
  panel.modal.getChildByPath('group-11/Spirit72').emit(engine.Button.EventType.CLICK);
  assert(panel.modal===null,'share close restores lobby');
  click(panel,679);assert(panel.modalKind==='vip-rooms'&&!panel.menu.active,'VIP entry shows its page and hides main menu');
  panel.modal.getChildByPath('group-103/Spirit3182').emit(engine.Button.EventType.CLICK);
  assert(panel.modal===null&&panel.menu.active,'VIP close restores main menu');
  globalThis.__lobbyMenuVerification={panel,checks,actions,tips,synthetic:true};
  await new Promise(resolve=>setTimeout(resolve,200));
  return {synthetic:true,scene:engine.director.getScene().name,checks:checks.length,failures:tips,
    canvas:canvas.getComponent(engine.UITransform).contentSize,actions};
}