fixes

frontend/vite.config.ts

@@ -2,6 +2,10 @@ import { defineConfig } from 'vite'
 import vue from '@vitejs/plugin-vue'
 import path from 'path'
 
+// Get backend URL from environment or use default
+const BACKEND_URL = process.env.VITE_BACKEND_URL || 'http://localhost:8080'
+const FRONTEND_PORT = parseInt(process.env.VITE_PORT || '5173')
+
 export default defineConfig({
   plugins: [vue()],
   resolve: {
@@ -10,10 +14,15 @@ export default defineConfig({
     },
   },
   server: {
-    port: 3000,
+    port: FRONTEND_PORT,
     proxy: {
       '/api': {
-        target: 'http://localhost:8080',
+        target: BACKEND_URL,
+        changeOrigin: true,
+      },
+      '/ws': {
+        target: BACKEND_URL.replace('http', 'ws'),
+        ws: true,
         changeOrigin: true,
       },
     },