fix(service-party-app): 修复路由和启动问题

1. 将 BrowserRouter 改为 HashRouter - Electron 使用 file:// 协议
2. 移除生产环境自动打开浏览器的代码
3. HTTP 服务器仅在开发模式下启动

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

backend/mpc-system/services/service-party-app/electron/main.ts

@@ -165,13 +165,11 @@ function setupIpcHandlers() {
 // 应用生命周期
 app.whenReady().then(async () => {
   await initServices();
-  startHttpServer();
-  createWindow();
-
-  // 自动打开浏览器 (可选)
-  if (process.env.OPEN_BROWSER !== 'false') {
-    shell.openExternal(`http://127.0.0.1:${HTTP_PORT}`);
+  // HTTP 服务器仅在开发模式下启动
+  if (process.env.NODE_ENV === 'development') {
+    startHttpServer();
   }
+  createWindow();
 
   app.on('activate', () => {
     if (BrowserWindow.getAllWindows().length === 0) {

backend/mpc-system/services/service-party-app/src/main.tsx

@@ -1,13 +1,14 @@
 import React from 'react';
 import ReactDOM from 'react-dom/client';
-import { BrowserRouter } from 'react-router-dom';
+import { HashRouter } from 'react-router-dom';
 import App from './App';
 import './styles/global.css';
 
+// Electron 使用 file:// 协议，需要用 HashRouter 而不是 BrowserRouter
 ReactDOM.createRoot(document.getElementById('root')!).render(
   <React.StrictMode>
-    <BrowserRouter>
+    <HashRouter>
       <App />
-    </BrowserRouter>
+    </HashRouter>
   </React.StrictMode>
 );