first commit

frontend/vite.config.js

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+import { defineConfig, loadEnv } from 'vite';
+import react from '@vitejs/plugin-react';
+
+export default defineConfig(({ mode }) => {
+  const env = loadEnv(mode, process.cwd(), '');
+  const rawTarget = env.VITE_BACKEND_URL || 'http://127.0.0.1:5001';
+  const apiTarget = rawTarget.replace(/\/api\/?$/, '');
+
+  return {
+    plugins: [react()],
+    server: {
+      host: true,
+      port: 5174,
+      strictPort: true,
+      proxy: {
+        '/api': {
+          target: apiTarget,
+          changeOrigin: true,
+        },
+      },
+    },
+  };
+});