fix: 如实显示型号不存在提示并简化飞书异常回复

capabilities/am516-delivery-prediction/docs/acceptance_samples.md

@@ -60,11 +60,28 @@ Rules and expected results:
 - a valid API date in another calendar year remains usable without a local holiday calendar;
 - accept zero workdays; reject negative, fractional, boolean, or non-numeric workday values and invalid dates;
 - if either new field is missing or invalid, report the lead-time result as unavailable instead of falling back to old fields or estimating;
-- a stopped original-model reply includes `原因：` identifying each missing, empty, or invalid field and a suggestion to check the API data; no record is appended;
+- a stopped original-model reply includes `原因：` identifying each missing, empty, or invalid item in everyday Chinese and a suggestion to check the query result; no record is appended;
 - each unavailable candidate is listed with its own reason; HTTP 404 or missing fields must not be summarized as a confirmed nonexistent model;
-- controlled-query failures show their safe category (configuration, authentication/permissions, HTTP, TLS, DNS/network, timeout, or JSON format), without displaying raw response bodies or secret-bearing error strings;
+- controlled-query failures explain their safe known cause in everyday Chinese, without HTTP codes, TLS, DNS, JSON, API Key, field-type requirements, arbitrary response bodies, or secret-bearing error strings;
 - choose the fastest candidate using the API workday count, even when the natural-day totals would rank candidates differently.
 
+## Sample 1C | Product Model Not Found Notice
+
+Local mocked response, matching AR51's screenshot:
+
+```json
+{"success": true, "data": "产品型号不存在，请检查产品型号是否正确"}
+```
+
+Expected:
+
+- for `eRob70H50I-FS-18CNC[V5]`, quantity 5, show `查询系统提示：产品型号不存在，请检查产品型号是否正确。`;
+- if this is the original model, stop before candidate queries and record append, with the reason and a plain-language suggestion to check the input;
+- if this is a candidate, retain its batch position and show its own system notice under `不可用候选`, for both initial and continuation batches;
+- do not show `data 格式错误` or assume a delivery date from `success=true`;
+- unknown text and missing/unreadable query results must not be labeled as confirmed nonexistent models or echoed verbatim; explain the known issue in everyday Chinese;
+- the fixed disclaimer appears once at the end, and no new dependency or configuration is required.
+
 ## Sample 1A | Continue With Other Candidates
 
 Preconditions: