test(rectification): lock failReceipt engine_message for compare failures

BUG-659 moved compare tool_failed fingerprints into failReceipt; keep the
source lock on the shared helper so the staging gate still requires a
redacted engine_message.

Co-authored-by: Cursor <cursoragent@cursor.com>

docs/tasks/PROGRESS-rectification-set-focus-tool-failed-20260912.md

@@ -38,6 +38,12 @@ Staging 容器日志（`deploy@118.26.111.127`，密钥 `~/.ssh/jyotisha-staging
 - 未跑 `next build` / 首屏 gzip
 - 未部署 staging 真机走查
 
+## 门禁跟进
+
+- Independent Staging Quality Gate run 2573 (`073a45b7`) validate 失败：`npm test` **fail 1 / 3136**
+- 失败项：`compare failure copy and receipt detail stay user-visible without PII` 仍锁 compare catch 内联 `engine_message: engineMessageForReceipt`；BUG-659 已抽到 `failReceipt`
+- 源码锁改为断言 helper 写 `engine_message` 且 compare catch 调用 `failReceipt`
+
 ## 未做
 
 - 未 push、未部署。真机：开场说两件学业，本轮不得出现 `tool_failed`；兜底或模型正文日期不重复。

frontend/tests/rectification-stale-compare-fix-20260907.test.ts

@@ -223,7 +223,12 @@ test("compare failure copy and receipt detail stay user-visible without PII", ()
   assert.match(agentRun, /withCompareFailedRetryNotice/);
   assert.match(agentRun, /rectification-compare-candidates/);
   const tools = readFileSync(new URL("../src/mastra/rectification-v9-tools.ts", import.meta.url), "utf8");
-  assert.match(tools, /engine_message: engineMessageForReceipt/);
+  // 原值: /engine_message: engineMessageForReceipt/ 写在 compare catch 里
+  // 新值: failReceipt 统一写 engine_message，compare catch 调用它
+  // 原因: BUG-659 失败回执抽成共享 helper，源码锁仍要保住脱敏原文
+  assert.match(tools, /const message = engineMessageForReceipt\(error\)/);
+  assert.match(tools, /engine_message: message/);
+  assert.match(tools, /failReceipt\("rectification-compare-candidates"/);
 });
 
 test("idle persist on a stale snapshot calls candidate score once", async () => {