feat: 完成错误原因合同与付款就绪提示（09-05-error-explainability-payment-readiness）

.trellis/tasks/09-05-error-explainability-payment-readiness/task.json

@@ -0,0 +1,33 @@
+{
+  "id": "error-explainability-payment-readiness",
+  "name": "error-explainability-payment-readiness",
+  "title": "错误可解释性与付款就绪治理",
+  "description": "建立稳定业务错误原因码与渐进 parity 门禁，并以付款批次实时 readiness 消除点击后才暴露的资料阻断。",
+  "status": "in_progress",
+  "dev_type": null,
+  "scope": null,
+  "package": null,
+  "priority": "P0",
+  "creator": "shunli",
+  "assignee": "shunli",
+  "createdAt": "2026-09-05",
+  "completedAt": null,
+  "branch": null,
+  "base_branch": "main",
+  "worktree_path": null,
+  "commit": null,
+  "pr_url": null,
+  "subtasks": [],
+  "children": [],
+  "parent": null,
+  "relatedFiles": [
+    "server/src/routes/paymentBatches.js",
+    "server/src/utils/AppError.js",
+    "client/src/api/errorMessages.ts",
+    "client/src/lib/resolveErrorMessage.ts",
+    "client/src/pages/PaymentBatchesPage.tsx",
+    "scripts/qa"
+  ],
+  "notes": "来源：真实单据 0014 创建付款批次时第三次出现‘参数校验失败’；生产只读诊断确认未创建批次，员工付款资料缺失且错误未被客户端解释。2026-09-05 最终规划已获用户批准实施；交接复核重点：门禁六类 self-test 真失败、主链路零例外且禁止新增例外、付款候选与创建共享同一 readiness resolver、20 处旧断言逐项处置且不得使用宽泛正则。0014 真实资料补录与付款不属于本 task 自动操作范围。",
+  "meta": {}
+}