fix: use API workdays and final delivery date in bot replies

capabilities/am516-delivery-prediction/docs/AM516自然日转工作日需求说明_给AR836_20260902.md

@@ -5,7 +5,7 @@
 **日期**：2026-09-02
 **目的**：将 AM516 交期预测输出的自然日转换为工作日，并据此得到最终交货日期。
 
-**当前临时处理**：因 AR836 排期较晚，AM516 飞书机器人先在 API 返回后的输出层执行同一换算；不修改 AR836 API 原始数据。待 API 正式提供工作日口径后，应移除本地临时换算，避免重复转换。
+**2026-09-20 实现更新**：API 已返回 `AM516工作日交期` 和 `AM516最终交货日期`。本仓库机器人回复已改为直接使用这两个字段，移除本地临时换算及日期推算；运行端需同步本次改动后生效。下文保留为原始需求与验证记录。
 
 ## 一、需求背景
 

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

@@ -40,17 +40,18 @@ Expected:
 - record-table columns follow this order: 序号、记录时间、型号、推荐类型、差异项、API状态、AM516预测交期、可用库存、主导因素;
 - unavailable candidates remain in their original rule order and are recorded as `❌ 不存在` with unavailable result fields shown as `—`;
 
-## Sample 1B | Natural Days To Workdays
+## Sample 1B | API Workdays And Final Delivery Date
 
 Rules and expected results:
 
-- treat `AM516总交期`, or numeric `总交期` when the AM516 field is absent, as the original natural-day lead time `N`;
-- convert `N` with the approved quotient-and-remainder rule, including `r = 4` as one rest day and `r = 0` as no remainder workday;
-- exclude the local query date itself, then count the converted workdays using the configured China statutory workday calendar;
-- statutory holidays are excluded and official makeup weekend workdays are included;
-- for a query date of `2026-09-02`, `31` natural days convert to `22` workdays and produce `2026-10-09`;
-- output `2026-10-09（原始31个自然日，折算22个工作日）` instead of adding a separate National Day exception;
-- when counting reaches an unconfigured calendar year, do not silently fall back to a Monday-Friday estimate.
+- read `data.交期汇总.AM516工作日交期` and `data.交期汇总.AM516最终交货日期` directly;
+- when the API returns `8` and `2026-10-08`, output `AM516预测交期：8个工作日，最终交货日期：2026-10-08`;
+- use the same workdays-and-date form in the fastest-candidate summary, initial and continuation candidate details, and newly appended record rows;
+- ignore natural-day totals and the old `AM516预测交期` field when selecting the displayed result; do not recalculate workdays or dates locally;
+- 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;
+- choose the fastest candidate using the API workday count, even when the natural-day totals would rank candidates differently.
 
 ## Sample 1A | Continue With Other Candidates
 

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

@@ -10,8 +10,8 @@
 6. Use model recommendation rules to generate the complete ordered internal candidate pool.
 7. Immediately add the Feishu `OnIt` (typing) reaction to the original message to acknowledge the valid request.
 8. Run the controlled script for the original model baseline and only the first four candidate models.
-9. Convert each numeric natural-day lead time to workdays with the approved quotient-and-remainder rule, then count those workdays from the local query date through the configured China statutory workday calendar. The query date itself is excluded.
-10. Summarize the current batch, including the original natural days, converted workdays, and calculated delivery date; state how many candidates remain and invite the same sender to ask naturally for more when candidates remain.
+9. Read `data.交期汇总.AM516工作日交期` and `data.交期汇总.AM516最终交货日期` directly. Require a nonnegative whole-number workday count and a valid `YYYY-MM-DD` date; missing or invalid fields make the result unavailable. Do not convert natural days or recalculate dates locally.
+10. Summarize the current batch with the API workdays and final delivery date, for example `AM516预测交期：8个工作日，最终交货日期：2026-10-08`; state how many candidates remain and invite the same sender to ask naturally for more when candidates remain. Newly appended records use the same form; historical records are unchanged.
 11. Append a non-secret record.
 12. Return Feishu-friendly text with the fixed disclaimer.