fix: 优化端口

src/server.ts

@@ -7,11 +7,37 @@ import path from 'path';
 dotenv.config();
 
 const app = express();
+const backendPort = Number(process.env.BACKEND_PORT) || 8000;
+const backendBase = `http://127.0.0.1:${backendPort}`;
 
 app.use(cors());
 app.use(express.json());
 app.use(morgan('dev'));
 
+// 代理 /api 和 /auth 到后端，使前端用相对路径即可（任意 -p/-b 端口都正确）
+async function proxyToBackend(req: express.Request, res: express.Response): Promise<void> {
+  try {
+    const url = backendBase + req.originalUrl;
+    const headers: Record<string, string> = { ...req.headers as Record<string, string> };
+    delete headers.host;
+    const opts: RequestInit = { method: req.method, headers };
+    if (req.body && ['POST', 'PUT', 'PATCH'].includes(req.method)) {
+      opts.body = typeof req.body === 'string' ? req.body : JSON.stringify(req.body);
+      if (!headers['content-type']) headers['content-type'] = 'application/json';
+    }
+    const proxyRes = await fetch(url, opts);
+    res.status(proxyRes.status);
+    proxyRes.headers.forEach((v, k) => res.setHeader(k, v));
+    const body = await proxyRes.text();
+    res.send(body);
+  } catch (e) {
+    res.status(502).json({ error: 'proxy_error', detail: String(e) });
+  }
+}
+app.use('/api', proxyToBackend);
+app.use('/auth', proxyToBackend);
+app.get('/openapi.json', (req, res) => proxyToBackend(req, res));
+
 const publicDir = path.join(__dirname, '../public');
 app.use(express.static(publicDir));