refactor(net): isolate transport and wire lifecycle

cocoscreator_projects/framework-tests/helpers/fake-transport.ts

@@ -4,21 +4,44 @@ import type { Transport } from '../../YouleNexus/assets/framework/net/transport.
 export class FakeTransport implements Transport {
   sent: string[] = [];
   url = '';
+  connectCalls = 0;
+  closeCalls = 0;
   private openCb?: () => void;
   private msgCb?: (f: string) => void;
   private closeCb?: () => void;
   private pending: Array<() => void> = [];
   private closed = false;
 
-  connect(url: string): void { this.url = url; this.pending.push(() => this.openCb?.()); }
+  connect(url: string): void {
+    this.connectCalls++;
+    this.url = url;
+    this.pending.push(() => this.openCb?.());
+  }
   send(frame: string): void { if (!this.closed) this.sent.push(frame); }
-  close(): void { if (this.closed) return; this.closed = true; this.pending.push(() => this.closeCb?.()); }
+  close(): void {
+    this.closeCalls++;
+    if (this.closed) return;
+    this.closed = true;
+    this.pending.push(() => this.closeCb?.());
+  }
   onOpen(cb: () => void): void { this.openCb = cb; }
   onMessage(cb: (f: string) => void): void { this.msgCb = cb; }
   onClose(cb: () => void): void { this.closeCb = cb; }
 
   /** 测试侧：模拟服务器推一帧给客户端。 */
-  serverPush(frame: string): void { if (!this.closed) this.pending.push(() => this.msgCb?.(frame)); }
+  serverPush(frame: string): void { this.pending.push(() => this.msgCb?.(frame)); }
+
+  /** 测试侧：模拟远端 close；允许重复信号以验证连接代际去重。 */
+  serverClose(): void {
+    this.closed = true;
+    this.pending.push(() => this.closeCb?.());
+  }
+
+  /** 测试侧：生产 adapter 的 error 最终收敛到 close 生命周期。 */
+  serverError(): void {
+    this.closed = true;
+    this.pending.push(() => this.closeCb?.());
+  }
 
   /** 冲刷所有挂起回调（解析微任务）。 */
   async flush(): Promise<void> {