修复bug

frontend/vite.config.ts

@@ -10,20 +10,12 @@ export default defineConfig({
       '@': resolve(__dirname, 'src'),
     },
   },
-  define: {
-    // 定义环境变量，使其在客户端可用
-    VITE_API_URL: JSON.stringify(process.env.VITE_API_URL || 'http://localhost:3001'),
-    VITE_APP_NAME: JSON.stringify(process.env.VITE_APP_NAME || 'Pandora'),
-    VITE_CLAUDE_TARGET_URL: JSON.stringify(process.env.CLAUDE_TARGET_URL || 'https://claude.ai'),
-    VITE_CHATGPT_TARGET_URL: JSON.stringify(process.env.CHATGPT_TARGET_URL || 'https://chat.openai.com'),
-    VITE_GROK_TARGET_URL: JSON.stringify(process.env.GROK_TARGET_URL || 'https://grok.x.ai'),
-  },
   server: {
     port: 3000,
     host: '0.0.0.0',
     proxy: {
       '/api': {
-        target: 'http://localhost:3001',
+        target: 'http://backend:3001',
         changeOrigin: true,
         secure: false,
       },