fix: exclude e2e directory from vitest

vitest.config.ts

@@ -18,5 +18,6 @@ export default defineConfig({
 		// Modules under test transitively import @/env; skip its strict parse so
 		// unit tests run without a populated .env.
 		env: { SKIP_ENV_VALIDATION: "1" },
+		exclude: ["e2e/**", "node_modules/**", ".next/**"],
 	},
 });