modify the url(/api) and set the port number 500

src/App.vue

@@ -189,7 +189,7 @@ const fetchData = async () => {
     }
 
     // 调用后端API（替换为你的实际API地址）
-    const response = await axios.get("http://localhost:8080/industry/values", {
+    const response = await axios.get("http://localhost:5000/api/industry/values", {
       params: {
         clusterName: selectedA.value || null,
         industrialChain: selectedB.value || null,