docs(i18n): address ds-review-bot on the v4 restoration

解析器：三段闭合标签改为行首锚定（正文提及 </translation> 不再截
断）、重复段全文扫描并校验段序（补两条回归测试）。切换行：v4 模板
保持字面占位不变，资产文档写明全新配对由流水线在解析后按目标文件
名机械插入、配对门禁兜底。加粗后空格限定于字母/数字/汉字、标点前
一律不加；RFC 2119 关键词改为保留源侧强调标记（斜体归斜体、加粗
归加粗）。i18n README 双侧同步 v4 契约描述（不再承诺 CDATA 协议与
规则注入）并重录配对。

scripts/translation-prompt.spec.ts

@@ -42,9 +42,19 @@ describe('translation response sections', () => {
     expect(parseTranslationResponse(fenced).final).toBe('A')
   })
 
+  it('keeps an inline close tag inside prose from terminating the section', () => {
+    const doc = { translation: 'the wire format uses </translation> as its close tag', review: '- 无修正', final: 'F' }
+    expect(parseTranslationResponse(renderTranslationResponse(doc))).toEqual(doc)
+  })
+
+  it('rejects a duplicate section appearing before final', () => {
+    const early = '<translation>\nA\n</translation>\n<translation>\nB\n</translation>\n<review>\nR\n</review>\n<final>\nF\n</final>'
+    expect(() => parseTranslationResponse(early)).toThrow(/duplicate <translation>/)
+  })
+
   it('rejects missing, unterminated, or duplicated sections', () => {
-    expect(() => parseTranslationResponse('<translation>\nA\n</translation>')).toThrow(/missing <review>/)
-    expect(() => parseTranslationResponse('<translation>\nA')).toThrow(/unterminated <translation>/)
+    expect(() => parseTranslationResponse('<translation>\nA\n</translation>')).toThrow(/missing or unterminated <review>/)
+    expect(() => parseTranslationResponse('<translation>\nA')).toThrow(/missing or unterminated <translation>/)
     const dup = '<translation>\nA\n</translation>\n<review>\nR\n</review>\n<final>\nF\n</final>\n<final>\nG\n</final>'
     expect(() => parseTranslationResponse(dup)).toThrow(/duplicate <final>/)
   })

scripts/translation-prompt.ts

@@ -81,6 +81,10 @@ export function renderTranslationResponse(response: TranslationResponse): string
  * and in order; bodies are raw Markdown taken verbatim between the tags.
  * A fenced ```xml wrapper around the whole response is tolerated, matching
  * the shape some models echo back from the prompt's own example.
+ *
+ * Section close tags are matched at line starts (the wire shape the prompt
+ * example establishes), so a tag mentioned inline in translated prose does
+ * not terminate its section early.
  */
 export function parseTranslationResponse(text: string): TranslationResponse {
   let body = text.trim()
@@ -88,20 +92,16 @@ export function parseTranslationResponse(text: string): TranslationResponse {
   if (fenced?.[1] !== undefined) body = fenced[1].trim()
 
   const values: Partial<Record<(typeof RESPONSE_SECTIONS)[number], string>> = {}
-  let cursor = 0
   for (const section of RESPONSE_SECTIONS) {
-    const open = `<${section}>`
-    const close = `</${section}>`
-    const start = body.indexOf(open, cursor)
-    if (start === -1) throw new Error(`translation response: missing <${section}> section`)
-    const end = body.indexOf(close, start + open.length)
-    if (end === -1) throw new Error(`translation response: unterminated <${section}> section`)
-    values[section] = body.slice(start + open.length, end).replace(/^\n/, '').replace(/\n$/, '')
-    cursor = end + close.length
+    const pattern = new RegExp(`^<${section}>\\n?([\\s\\S]*?)\\n?^</${section}>$`, 'gm')
+    const first = pattern.exec(body)
+    if (first?.[1] === undefined) throw new Error(`translation response: missing or unterminated <${section}> section`)
+    if (pattern.exec(body) !== null) throw new Error(`translation response: duplicate <${section}> section`)
+    values[section] = first[1]
   }
-  for (const section of RESPONSE_SECTIONS) {
-    const again = body.indexOf(`<${section}>`, cursor)
-    if (again !== -1) throw new Error(`translation response: duplicate <${section}> section`)
+  const order = RESPONSE_SECTIONS.map(section => body.search(new RegExp(`^<${section}>`, 'm')))
+  if (!(order[0]! < order[1]! && order[1]! < order[2]!)) {
+    throw new Error('translation response: sections must appear in translation, review, final order')
   }
   return values as TranslationResponse
 }