fix: 清理自动合并时残留的4条重复错误码 [09-05-error-explainability-payment-readiness]

合并时 errorReasons.js/errorReasons.ts 未被判定为冲突，git 自动把
主线首批4个条目和候选分支的完整版本拼在了一起，导致同一语义有两套
命名（如 ap_operations.feature_disabled 与 ap_operations.disabled
并存）。删除主线这4条已被取代的旧条目，保留候选分支的完整版本。

check-error-reason-contract.mjs 主检查+self-test 均恢复 PASS。

Co-Authored-By: Claude Sonnet 5 <[email protected]>

server/src/constants/errorReasons.js

@@ -850,10 +850,6 @@ const ERROR_REASONS = [
   { code: "payment_batch.payment_account_unavailable", domain: "payment_batch", audience: "user", defaultMessage: "公司付款账户暂不可用，请联系管理员检查账户配置后重试。", recovery: "contact_admin" },
   { code: "payment_batch.active_batch_exists", domain: "payment_batch", audience: "user", defaultMessage: "所选单据已进入其他付款安排，请刷新列表并查看已有批次。", recovery: "refresh" },
   { code: "payment_batch.reviewer_required", domain: "payment_batch", audience: "user", defaultMessage: "当前没有可复核的经理或负责人，制单人不能复核自己的批次，请联系管理员安排独立复核人。", recovery: "contact_admin" },
-  { code: "ap_operations.feature_disabled", domain: "ap_operations", audience: "user", defaultMessage: "应付账款暂未开放，请联系管理员确认处理方式。", recovery: "contact_admin" },
-  { code: "ap_operations.query_invalid", domain: "ap_operations", audience: "user", defaultMessage: "查询条件不符合要求，请检查筛选条件后重试。", recovery: "follow_guidance" },
-  { code: "todo.feature_disabled", domain: "todo", audience: "user", defaultMessage: "待办功能暂未开放，请联系管理员确认处理方式。", recovery: "contact_admin" },
-  { code: "portal.feature_disabled", domain: "portal", audience: "user", defaultMessage: "工作台暂未开放，请联系管理员确认处理方式。", recovery: "contact_admin" },
 ];
 
 const reasonsByCode = new Map(ERROR_REASONS.map((reason) => [reason.code, Object.freeze(reason)]));