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frontend/vitest.config.ts

@@ -0,0 +1,18 @@
+import { fileURLToPath, URL } from 'node:url'
+import { defineConfig } from 'vitest/config'
+
+// Separate from vite.config.ts so the dev/build config stays clean and the
+// test-only jsdom environment + glob don't leak into `vite build`.
+// We still reuse the same `@` alias for consistency with app code.
+export default defineConfig({
+  resolve: {
+    alias: {
+      '@': fileURLToPath(new URL('./src', import.meta.url)),
+    },
+  },
+  test: {
+    environment: 'jsdom',
+    globals: true,
+    include: ['src/**/__tests__/**/*.test.ts'],
+  },
+})