chore: import upstream snapshot with attribution

apps/desktop/scripts/before-pack.test.mjs

@@ -0,0 +1,52 @@
+import assert from 'node:assert/strict'
+import fs from 'node:fs'
+import os from 'node:os'
+import path from 'node:path'
+import test from 'node:test'
+
+import beforePack, { cleanStaleAppOutDir } from '../scripts/before-pack.mjs'
+
+test('cleanStaleAppOutDir removes a populated unpacked directory', () => {
+  const tempRoot = fs.mkdtempSync(path.join(os.tmpdir(), 'hermes-before-pack-'))
+  try {
+    const appOutDir = path.join(tempRoot, 'linux-unpacked')
+    fs.mkdirSync(appOutDir, { recursive: true })
+    // Reproduce the corrupted partial state: license + payload present,
+    // electron binary missing — exactly what trips the ENOENT rename.
+    fs.writeFileSync(path.join(appOutDir, 'LICENSE.electron.txt'), 'x', 'utf8')
+    fs.writeFileSync(path.join(appOutDir, 'resources.pak'), 'x', 'utf8')
+    fs.mkdirSync(path.join(appOutDir, 'resources'), { recursive: true })
+    fs.writeFileSync(path.join(appOutDir, 'resources', 'app.asar'), 'x', 'utf8')
+
+    const removed = cleanStaleAppOutDir(appOutDir)
+
+    assert.equal(removed, true)
+    assert.equal(fs.existsSync(appOutDir), false)
+  } finally {
+    fs.rmSync(tempRoot, { recursive: true, force: true })
+  }
+})
+
+test('cleanStaleAppOutDir is a no-op when the directory is absent', () => {
+  const tempRoot = fs.mkdtempSync(path.join(os.tmpdir(), 'hermes-before-pack-'))
+  try {
+    const missing = path.join(tempRoot, 'does-not-exist')
+    assert.equal(cleanStaleAppOutDir(missing), false)
+  } finally {
+    fs.rmSync(tempRoot, { recursive: true, force: true })
+  }
+})
+
+test('cleanStaleAppOutDir ignores empty or invalid input', () => {
+  assert.equal(cleanStaleAppOutDir(''), false)
+  assert.equal(cleanStaleAppOutDir(undefined), false)
+  assert.equal(cleanStaleAppOutDir(null), false)
+  assert.equal(cleanStaleAppOutDir(42), false)
+})
+
+test('beforePack default export resolves even when cleanup throws', async () => {
+  // A directory path that rmSync can't remove is simulated by passing a
+  // context whose appOutDir is a file the hook will try (and be allowed) to
+  // remove; the contract under test is that the hook never rejects.
+  await assert.doesNotReject(beforePack({ appOutDir: '', electronPlatformName: 'linux' }))
+})