build: electron-builder 打包配置 + 首次构建（win-unpacked 可运行 168MB，cross-env 注入 npmmirror 镜像；打包产物冒烟测试启动 .exe）

apps/desktop/tests/e2e/packaged.spec.ts

@@ -0,0 +1,22 @@
+import { test, expect } from '@playwright/test';
+import { _electron as electron } from 'playwright';
+import { promises as fs } from 'node:fs';
+import nodePath from 'node:path';
+import os from 'node:os';
+
+// 打包产物冒烟：启动 electron-builder 产出的 win-unpacked 可执行文件（FR-A0 可安装/可运行基线）
+const EXE = nodePath.join(process.cwd(), 'release/win-unpacked/HunterNotes.exe');
+
+test('packaged app launches and renders title bar', async () => {
+  const exists = await fs.stat(EXE).then(() => true).catch(() => false);
+  if (!exists) test.skip(true, 'HunterNotes.exe 未构建：先跑 pnpm --filter @hunter/desktop dist');
+  const tmp = await fs.mkdtemp(nodePath.join(os.tmpdir(), 'hn-pkg-'));
+  const app = await electron.launch({ executablePath: EXE, args: ['--user-data-dir=' + nodePath.join(tmp, 'userdata')] });
+  try {
+    const page = await app.firstWindow();
+    await page.waitForLoadState('domcontentloaded');
+    await expect(page.getByText('狩夜人笔记').first()).toBeVisible({ timeout: 15000 });
+  } finally {
+    await app.close();
+  }
+});