新增syncvar高级特性，使用protobuf定义

packages/network/tests/SyncVarE2ESimple.test.ts

@@ -0,0 +1,40 @@
+import 'reflect-metadata';
+import { SyncVar } from '../src/SyncVar';
+import { createSyncVarProxy } from '../src/SyncVar/SyncVarProxy';
+import { NetworkComponent } from '../src/NetworkComponent';
+
+// 简化的测试用网络组件
+class SimpleTestComponent extends NetworkComponent {
+    @SyncVar()
+    public health: number = 100;
+    
+    @SyncVar()
+    public name: string = 'TestPlayer';
+}
+
+describe('SyncVar端到端简单测试', () => {
+    test('基本的SyncVar代理创建', () => {
+        const component = new SimpleTestComponent();
+        const proxiedComponent = createSyncVarProxy(component) as SimpleTestComponent;
+        
+        expect(proxiedComponent).toBeDefined();
+        expect(proxiedComponent.health).toBe(100);
+        expect(proxiedComponent.name).toBe('TestPlayer');
+        
+        // 修改值应该能正常工作
+        proxiedComponent.health = 80;
+        expect(proxiedComponent.health).toBe(80);
+    });
+    
+    test('SyncVar变化记录', () => {
+        const component = createSyncVarProxy(new SimpleTestComponent()) as SimpleTestComponent;
+        
+        // 修改值
+        component.health = 75;
+        component.name = 'Hero';
+        
+        // 检查是否有变化记录
+        const changes = component.getSyncVarChanges();
+        expect(changes.length).toBeGreaterThan(0);
+    });
+});