test: adjust playwright

see microsoft/playwright#11932 (comment)

playwright/index.test.ts

@@ -1,3 +1,5 @@
+import process from "process";
+
 import type { ElectronApplication, Page } from "@playwright/test";
 import { test, expect } from "@playwright/test";
 import { _electron as electron } from "playwright";
@@ -7,7 +9,13 @@ let page: Page;
 
 test.beforeAll(async () => {
 	// Use  package.main
-	electronApp = await electron.launch({ args: ["."] });
+	electronApp = await electron.launch({
+		args: ["."],
+		env: {
+			...process.env,
+			NODE_ENV: "development",
+		},
+	});
 	const isPackaged = await electronApp.evaluate(async ({ app }) => app.isPackaged);
 
 	expect(isPackaged).toBe(false);