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

capabilities/am516-delivery-prediction/skills/joint-module-leadtime-report/SKILL.md

@@ -93,12 +93,10 @@ Do not use temporary curl, WebFetch, or any API method outside the controlled sc
 
 ## Output Selection
 
-- Prefer numeric `data.交期汇总.AM516总交期`; if it is absent, fall back to numeric `data.交期汇总.总交期`. Treat this value as the original natural-day lead time `N`.
-- Convert `N` with `(q, r) = divmod(N, 7)`: `r = 0` gives `q × 5`; `1 ≤ r ≤ 4` gives `q × 5 + MAX(r - 1, 0)`; `5 ≤ r ≤ 6` gives `q × 5 + r - 2`. The result is workday lead time `W`.
-- Starting from the local query date, exclude the query date itself and count forward `W` workdays using the configured China statutory calendar. Statutory holidays are not workdays, ordinary Saturdays and Sundays are not workdays, and official makeup Saturdays or Sundays are workdays.
-- The configured 2026 calendar follows `国办发明电〔2025〕7号`. If counting reaches a year whose official calendar is not configured, do not silently estimate a delivery date; mark that calendar year as pending.
-- Display the calculated delivery date together with both `N` and `W`, for example `2026-10-09（原始31个自然日，折算22个工作日）`.
-- Use `data.交期汇总.AM516预测交期` only as a fallback when the API does not return a usable whole-number natural-day lead time, and explicitly mark that no conversion was performed.
+- Read the workday count directly from `data.交期汇总.AM516工作日交期` and the corresponding final delivery date from `data.交期汇总.AM516最终交货日期`.
+- Require a nonnegative whole-number workday count (including zero) and a valid `YYYY-MM-DD` date. Both must be returned by the API; missing or invalid values make the lead-time result unavailable.
+- Display `8个工作日，最终交货日期：2026-10-08` consistently in the overall judgment, candidate details, and newly appended records. Rank the fastest candidate by the API workday count.
+- Do not convert natural days, recalculate dates from the local query date, or fall back to the old `AM516预测交期` field. `AM516总交期` and `总交期` remain natural-day reference fields and are not shown in the reply.
 
 ## Candidate Batch Rule
 
@@ -163,13 +161,13 @@ Use this field order for a successful Feishu report:
 总体判断：
 - 现货候选：{fully covered candidate or none}
 - 最快候选型号：{fastest candidate}
-- 最快候选交期：{calculated delivery date, original natural days, and converted workdays}
+- 最快候选交期：{API workdays}个工作日，最终交货日期：{API final delivery date}
 - 是否完全覆盖数量：{yes / no / unavailable}
 - 主导因素：{main factor}
 
 1. {model}（{candidate type and reducer brand}）
 - 数量：{quantity}台
-- AM516预测交期：{calculated delivery date}（原始{N}个自然日，折算{W}个工作日）
+- AM516预测交期：{API workdays}个工作日，最终交货日期：{API final delivery date}
 - 可用库存/覆盖情况：{summary-level inventory and coverage only}
 - 主导因素：{main factor}
 - 推荐理由：{rule-based recommendation reason}