refactor: everything to nuxt.js

vitest.config.ts

@@ -0,0 +1,10 @@
+import { defineConfig, loadEnv } from 'vite';
+
+export default defineConfig(({ mode }) => ({
+  test: {
+    environment: 'node',
+    testTimeout: 10000,
+    // Load all vars from .env.local (empty prefix = no filter)
+    env: loadEnv(mode, process.cwd(), ''),
+  },
+}));