feat: initialize ZCLAW project with core systems and Tauri desktop

- Created backend core systems:
  - Remote Execution System (远程执行系统)
  - Task Orchestration Engine (任务编排引擎)
  - Persistent Memory System (持续记忆系统)
  - Proactive Service System (主动服务系统)

- Created Tauri desktop app:
  - Three-column layout based on AutoClaw design
  - React + TypeScript + Tailwind CSS
  - Zustand state management
  - Lucide React icons

- Components:
  - Sidebar (Agent list, IM channels, scheduled tasks)
  - ChatArea (Chat interface with message bubbles)
  - RightPanel (Task progress, statistics, next actions)

Next: Test Tauri dev server and integrate with OpenClaw backend

desktop/src/App.tsx

@@ -0,0 +1,23 @@
+import './index.css';
+import { Sidebar } from './components/Sidebar';
+import { ChatArea } from './components/ChatArea';
+import { RightPanel } from './components/RightPanel';
+
+function App() {
+  return (
+    <div className="h-screen flex overflow-hidden text-gray-800 text-sm">
+      {/* 左侧边栏 */}
+      <Sidebar />
+      
+      {/* 中间对话区域 */}
+      <main className="flex-1 flex flex-col bg-white relative">
+        <ChatArea />
+      </main>
+      
+      {/* 右侧边栏 */}
+      <RightPanel />
+    </div>
+  );
+}
+
+export default App;