Add code

vitest.config.ts

@@ -0,0 +1,16 @@
+import { defineConfig } from 'vitest/config';
+
+export default defineConfig({
+  test: {
+    globals: true,
+    environment: 'node',
+    include: ['tests/unit/**/*.test.ts', 'tests/integration/**/*.test.ts'],
+    coverage: {
+      provider: 'v8',
+      reporter: ['text', 'json', 'html'],
+      exclude: ['node_modules/', 'dist/', 'tests/fixtures/']
+    },
+    testTimeout: 30000,
+    hookTimeout: 30000
+  }
+});