fix(i18n): complete prompt v4 pipeline path

scripts/translation-prompt.snapshot.ts

@@ -0,0 +1,32 @@
+/** Runnable keyless snapshot for the assembled translation request and consumed response. */
+
+import { execFile } from 'node:child_process'
+import { access, mkdir, writeFile } from 'node:fs/promises'
+import { dirname, join, resolve } from 'node:path'
+import { promisify } from 'node:util'
+import { describe, expect, it } from 'vitest'
+
+const execFileAsync = promisify(execFile)
+const root = resolve(import.meta.dirname, '..')
+const expected = join(root, 'scripts/snapshots/translation-prompt-v4/request-response.expected.json')
+const refreshing = process.env.DSH_SNAPSHOT === 'record' || process.env.DSH_SNAPSHOT === 'refresh'
+
+describe('translation prompt runnable snapshot', () => {
+  it('assembles the reviewed examples and consumes a recorded new-pair response', async () => {
+    const { stdout, stderr } = await execFileAsync(process.execPath, [
+      join(root, 'scripts/verify-translation-prompt.ts'),
+      '--snapshot',
+    ], { cwd: root, maxBuffer: 4 * 1024 * 1024 })
+    expect(stderr).toBe('')
+    expect(() => {
+      JSON.parse(stdout)
+    }).not.toThrow()
+    if (refreshing) {
+      await mkdir(dirname(expected), { recursive: true })
+      await writeFile(expected, stdout)
+    } else {
+      await access(expected)
+    }
+    await expect(stdout).toMatchFileSnapshot(expected)
+  })
+})