diff --git a/apps/webui/src/lib/auth.ts b/apps/webui/src/lib/auth.ts
index 6310cc8..f375e8f 100644
--- a/apps/webui/src/lib/auth.ts
+++ b/apps/webui/src/lib/auth.ts
@@ -93,7 +93,6 @@ export function toApiErrorResponse(error: unknown): NextResponse {
       { status: 400 }
     );
   }
-  // eslint-disable-next-line no-console
   console.error('[api]', error);
   return NextResponse.json({ error: 'Internal server error' }, { status: 500 });
 }
diff --git a/apps/webui/vitest.config.ts b/apps/webui/vitest.config.ts
new file mode 100644
index 0000000..d55efcb
--- /dev/null
+++ b/apps/webui/vitest.config.ts
@@ -0,0 +1,22 @@
+import path from 'path';
+import { defineConfig } from 'vitest/config';
+
+export default defineConfig({
+  // Avoid Vite trying to load the Next.js-flavored postcss.config.mjs
+  // (array-of-strings plugin syntax), which the standalone PostCSS loader
+  // used by Vite/Vitest cannot parse. None of our unit tests need CSS.
+  css: {
+    postcss: {
+      plugins: []
+    }
+  },
+  test: {
+    environment: 'node',
+    css: false
+  },
+  resolve: {
+    alias: {
+      '@': path.resolve(__dirname, './src')
+    }
+  }
+});