test: switch runner to browser mode

- Run tests in native browser instead of using jsdom

vitest-base.config.ts

@@ -0,0 +1,16 @@
+// Learn more about Vitest configuration options at https://vitest.dev/config/
+
+import { playwright } from '@vitest/browser-playwright';
+import { defineConfig } from 'vitest/config';
+
+export default defineConfig({
+  test: {
+    browser: {
+      provider: playwright(),
+      enabled: true,
+      instances: [
+        { browser: 'chromium' },
+      ],
+    },
+  }
+});