feat: article editor core

web/vitest.config.ts

@@ -7,6 +7,7 @@ export default mergeConfig(
 	defineConfig({
 		test: {
 			environment: 'jsdom',
+			env: { TZ: 'UTC' },
 			exclude: [...configDefaults.exclude, 'e2e/**'],
 			root: fileURLToPath(new URL('./', import.meta.url)),
 		},