修改

frontend/payroll-calculation.html

@@ -532,7 +532,9 @@
     </div>
 
     <script>
-      const API_BASE = "http://localhost:18080";
+      // Use relative API paths so frontend works when served via nginx on the NAS.
+      // The nginx service will proxy API requests to the backend container.
+      const API_BASE = "";
       let employeeMap = {};
 
       // sanitize input to digits only and limit length