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+# 报销域日期列头双三角排序 Implementation Plan
+
+> **For agentic workers:** REQUIRED SUB-SKILL: Use superpowers:subagent-driven-development (recommended) or superpowers:executing-plans to implement this plan task-by-task. Steps use checkbox (`- [ ]`) syntax for tracking.
+
+**Goal:** 在有日期列的报销相关列表上，为 `datetime` 列头增加与 CRM 相同的双三角整库排序（视图合并页为拉全量后的客户端排序）。
+
+**Architecture:** 扩展 `ColumnHeaderFilter`：存在 `crmColumnSort` inject 且 `type==='datetime'` 时渲染双三角。页面接入已有 `useColumnSort`。后端复用 `resolve_datetime_order_by`；`applyTime` 映射 `create_time`。视图 mine/todo/all 已 `fetchAllPagedRecords` 合并双边数据，改 `sortMergedRows` 按当前 sort 状态排。
+
+**Tech Stack:** Vue 3、`ColumnHeaderFilter`、`useColumnSort`、FastAPI、SQLAlchemy、`resolve_datetime_order_by`
+
+**Spec:** `docs/superpowers/specs/2026-09-08-bx-date-column-sort-design.md`
+
+---
+
+## 文件结构
+
+| 操作 | 文件 | 职责 |
+|------|------|------|
+| Modify | `web-admin/src/components/business/column-header-filter/index.vue` | datetime + inject 时显示双三角 |
+| Modify | `backend/app/services/bx/base.py` | `get_paged` 支持可选 `order_by` |
+| Create | `backend/app/services/bx/list_sort.py` | 各实体白名单封装（调用 crm `resolve_datetime_order_by`） |
+| Create | `backend/tests/test_bx_list_sort.py` | 白名单映射单测 |
+| Modify | `backend/app/api/bx/advance.py` + `services/bx/advance.py` | 透传 sort → order |
+| Modify | `backend/app/api/bx/reimburse.py` + `services/bx/reimburse.py` | 同上 |
+| Modify | `backend/app/api/bx/payment.py` + 付款 list 路径 | `applyTime`/`payTime` |
+| Modify | `backend/app/api/bx/invoice.py` + `services/bx/invoice.py` | 我的发票/流水 `createTime` |
+| Modify | `backend/app/api/bx/export_common.py` | `BxApplyListExportBody` 显式 `sortField`/`sortOrder`（可选，extra=allow 已可透传） |
+| Modify | 各 `views/bx/**/index.vue`（见 Task 6–10） | provide + merge query + 藏列 |
+
+**不做：** expense-item、workflow、invoice-wallet/admin；非日期列。
+
+---
+
+### Task 1: `ColumnHeaderFilter` 双三角
+
+**Files:**
+- Modify: `web-admin/src/components/business/column-header-filter/index.vue`
+
+- [ ] **Step 1: 改模板根结构**
+
+当前根节点是单个 `el-popover`。改为外包一层，在 popover **之前**插入三角（与 CRM 列头「标题 | 三角 | 漏斗」一致；标题仍由页面 label 提供）：
+
+```vue
+<template>
+  <span class="col-header-filter-root">
+    <span
+      v-if="showSort"
+      class="col-header-sort-pair"
+      @click.stop
+    >
+      <button
+        type="button"
+        class="col-header-sort-btn"
+        :class="{ on: sortApi!.isSortActive(prop, 'asc') }"
+        title="升序"
+        aria-label="升序"
+        @click="sortApi!.setSort(prop, 'asc')"
+      >▲</button>
+      <button
+        type="button"
+        class="col-header-sort-btn"
+        :class="{ on: sortApi!.isSortActive(prop, 'desc') }"
+        title="降序"
+        aria-label="降序"
+        @click="sortApi!.setSort(prop, 'desc')"
+      >▼</button>
+    </span>
+    <el-popover ...现有内容不变...>
+      ...
+    </el-popover>
+  </span>
+</template>
+```
+
+- [ ] **Step 2: script 增加 inject**
+
+```ts
+import { computed, inject, ref, watch } from 'vue'
+// ...
+
+const sortApi = inject<{
+  setSort: (prop: string, order: 'asc' | 'desc') => void
+  isSortActive: (prop: string, order?: 'asc' | 'desc') => boolean
+} | null>('crmColumnSort', null)
+
+const showSort = computed(() => Boolean(sortApi && props.type === 'datetime'))
+```
+
+样式 `.col-header-sort-pair` 已在同文件全局 style 中（CRM Task 6 已加），无需重复。可补：
+
+```scss
+.col-header-filter-root {
+  display: inline-flex;
+  align-items: center;
+  gap: 4px;
+  flex-shrink: 0;
+}
+```
+
+- [ ] **Step 3: 确认无 provide 时不显示三角；CRM 的 `CrmColFilterHeader` 仍自带三角（两套并存可接受）**
+
+- [ ] **Step 4: Commit**
+
+```bash
+git add web-admin/src/components/business/column-header-filter/index.vue
+git commit -m "feat(web-admin): show dual carets on ColumnHeaderFilter datetime columns."
+```
+
+---
+
+### Task 2: BX 排序白名单 helper + `get_paged` 可选 order
+
+**Files:**
+- Create: `backend/app/services/bx/list_sort.py`
+- Create: `backend/tests/test_bx_list_sort.py`
+- Modify: `backend/app/services/bx/base.py`
+
+- [ ] **Step 1: 写失败测试**
+
+```python
+# backend/tests/test_bx_list_sort.py
+from app.models.bx_models import BxAdvanceApply, BxReimburseApply, BxInvoice, BxInvoiceLedger
+from app.services.bx.list_sort import (
+    order_advance,
+    order_reimburse,
+    order_invoice,
+    order_ledger,
+)
+
+
+def test_advance_apply_time_asc():
+    expr = order_advance("applyTime", "asc")
+    assert "create_time" in str(expr).lower()
+    assert "asc" in str(expr).lower()
+
+
+def test_advance_issue_time():
+    expr = order_advance("issueTime", "desc")
+    assert "issue_time" in str(expr).lower()
+
+
+def test_advance_invalid_falls_back():
+    default = BxAdvanceApply.create_time.desc()
+    assert order_advance("hack", "asc", default=default) is default
+
+
+def test_reimburse_pay_time():
+    expr = order_reimburse("payTime", "desc")
+    assert "pay_time" in str(expr).lower()
+
+
+def test_invoice_create_time():
+    expr = order_invoice("createTime", "asc")
+    assert "create_time" in str(expr).lower()
+```
+
+（若模型 import 路径不同，以仓库 `app.models` 实际模块为准。）
+
+- [ ] **Step 2: pytest 应 FAIL**
+
+```bash
+cd backend && source venv/bin/activate && PYTHONPATH=. pytest tests/test_bx_list_sort.py -v
+```
+
+- [ ] **Step 3: 实现 `list_sort.py`**
+
+```python
+# backend/app/services/bx/list_sort.py
+from __future__ import annotations
+from typing import Any, Optional
+
+from app.models.bx_models import (
+    BxAdvanceApply,
+    BxInvoice,
+    BxInvoiceLedger,
+    BxReimburseApply,
+)
+from app.services.crm.list_sort import resolve_datetime_order_by
+
+ADVANCE_WHITELIST = {
+    "applyTime": BxAdvanceApply.create_time,
+    "issueTime": BxAdvanceApply.issue_time,
+}
+REIMBURSE_WHITELIST = {
+    "applyTime": BxReimburseApply.create_time,
+    "payTime": BxReimburseApply.pay_time,
+}
+INVOICE_WHITELIST = {"createTime": BxInvoice.create_time}
+LEDGER_WHITELIST = {"createTime": BxInvoiceLedger.create_time}
+
+
+def order_advance(sort_field: Optional[str], sort_order: Optional[str], default=None):
+    if default is None:
+        default = BxAdvanceApply.create_time.desc()
+    return resolve_datetime_order_by(sort_field, sort_order, ADVANCE_WHITELIST, default)
+
+
+def order_reimburse(sort_field: Optional[str], sort_order: Optional[str], default=None):
+    if default is None:
+        default = BxReimburseApply.create_time.desc()
+    return resolve_datetime_order_by(sort_field, sort_order, REIMBURSE_WHITELIST, default)
+
+
+def order_invoice(sort_field: Optional[str], sort_order: Optional[str], default=None):
+    if default is None:
+        default = BxInvoice.create_time.desc()
+    return resolve_datetime_order_by(sort_field, sort_order, INVOICE_WHITELIST, default)
+
+
+def order_ledger(sort_field: Optional[str], sort_order: Optional[str], default=None):
+    if default is None:
+        default = BxInvoiceLedger.create_time.desc()
+    return resolve_datetime_order_by(sort_field, sort_order, LEDGER_WHITELIST, default)
+
+
+def parse_sort_params(params: dict) -> tuple:
+    """从 request/body dict 取 sortField/sortOrder（兼容 snake）。"""
+    sf = params.get("sortField") or params.get("sort_field")
+    so = params.get("sortOrder") or params.get("sort_order")
+    return (str(sf).strip() if sf else None), (str(so).strip() if so else None)
+```
+
+- [ ] **Step 4: `BxCrudService.get_paged` 增加可选 `order_by=None`**
+
+在现有默认 `order_by(sort_order, create_time)` 分支前：
+
+```python
+order_by: Optional[Any] = None,
+# ...
+if order_by is not None:
+    query = query.order_by(order_by)
+elif hasattr(model, "sort_order"):
+    ...
+else:
+    query = query.order_by(model.create_time.desc())
+```
+
+- [ ] **Step 5: 测试通过并 Commit**
+
+```bash
+git add backend/app/services/bx/list_sort.py backend/tests/test_bx_list_sort.py backend/app/services/bx/base.py
+git commit -m "feat(bx): add datetime list sort helpers and get_paged order_by."
+```
+
+---
+
+### Task 3: 备用金 API/Service 接排序
+
+**Files:**
+- Modify: `backend/app/api/bx/advance.py`
+- Modify: `backend/app/services/bx/advance.py`
+- Modify: `backend/app/api/bx/export_common.py`（可选显式字段）
+
+- [ ] **Step 1: `BxApplyListExportBody` 增加**
+
+```python
+sort_field: Optional[str] = Field(default=None, alias="sortField")
+sort_order: Optional[str] = Field(default=None, alias="sortOrder")
+```
+
+（`extra=allow` 已有则 GET query 的 `sortField` 进 `_merge_query` 即可；显式字段便于导出 body。）
+
+- [ ] **Step 2: 所有走 `AdvanceService.get_paged` 的 list/export**
+
+在调用前：
+
+```python
+from app.services.bx.list_sort import order_advance, parse_sort_params
+
+sf, so = parse_sort_params(params)
+order = order_advance(sf, so)
+rows, total = AdvanceService.get_paged(..., order_by=order)
+```
+
+确认 `AdvanceService.get_paged` 把 `order_by` 传给 `BxCrudService.get_paged`（若当前是薄封装，补参数）。
+
+- [ ] **Step 3: `pending_approval` / `approved_by_me`**
+
+将硬编码 `.order_by(BxAdvanceApply.create_time.desc())` 改为 `order_by(order_advance(sf, so))`；`sf/so` 从该接口的 `params`/`_merge_query` 读取。
+
+- [ ] **Step 4: Commit**
+
+```bash
+git commit -m "feat(bx): support datetime column sort on advance lists."
+```
+
+---
+
+### Task 4: 报销 API/Service 接排序
+
+**Files:**
+- Modify: `backend/app/api/bx/reimburse.py`
+- Modify: `backend/app/services/bx/reimburse.py`
+
+镜像 Task 3：`get_paged`、`pending_approval`、`approved_by_me` 及对应 export 使用 `order_reimburse`。白名单含 `applyTime`、`payTime`。
+
+```bash
+git commit -m "feat(bx): support datetime column sort on reimburse lists."
+```
+
+---
+
+### Task 5: 支付发放冲抵接排序
+
+**Files:**
+- Modify: `backend/app/api/bx/payment.py`（及实际 list/export 调用的 service）
+
+待处理/已处理列表对 `BxReimburseApply` 排序时用 `order_reimburse`（`applyTime`/`payTime`）。冲抵记录子表（`BxReimburseOffset.create_time`）**本批不改**（非主列表漏斗列）。
+
+```bash
+git commit -m "feat(bx): support datetime column sort on payment lists."
+```
+
+---
+
+### Task 6: 我的发票夹后端
+
+**Files:**
+- Modify: `backend/app/api/bx/invoice.py`
+- Modify: `backend/app/services/bx/invoice.py`
+
+- `list_invoices`：经 `get_paged` 传入 `order_by=order_invoice(sf, so)`；API `_param_get` / merge 取出 sort。  
+- `list_ledgers`：将 `order_by(BxInvoiceLedger.create_time.desc())` 换为 `order_ledger(sf, so)`。
+
+```bash
+git commit -m "feat(bx): support datetime column sort on my invoice wallet lists."
+```
+
+---
+
+### Task 7: 接线备用金三页前端
+
+**Files:**
+- `web-admin/src/views/bx/advance/apply/index.vue`
+- `web-admin/src/views/bx/advance/approve/index.vue`
+- `web-admin/src/views/bx/advance/issue/index.vue`
+
+每页：
+
+```ts
+import { useColumnSort } from '@/composables/useColumnSort'
+
+const {
+  setSort, clearSort, isSortActive, sortField, sortOrder,
+  toQueryParams: toSortQueryParams,
+  watchVisibleColumns: watchSortVisibleColumns
+} = useColumnSort({ onChange: () => { /* 现有 reset page + load */ } })
+
+provide('crmColumnSort', { setSort, clearSort, isSortActive, sortField, sortOrder })
+```
+
+列表/导出参数合并 `...toSortQueryParams()`；`watchSortVisibleColumns(visibleFilterProps)`。
+
+审批/发放若双 Tab 共用一套 filters，共用一套 sort 即可。
+
+```bash
+git commit -m "feat(bx): wire date column sort on advance apply/approve/issue pages."
+```
+
+---
+
+### Task 8: 接线报销申请/审批前端
+
+**Files:**
+- `web-admin/src/views/bx/reimburse/apply/index.vue`
+- `web-admin/src/views/bx/reimburse/approve/index.vue`
+
+同 Task 7 模式。
+
+```bash
+git commit -m "feat(bx): wire date column sort on reimburse apply/approve pages."
+```
+
+---
+
+### Task 9: 接线支付页前端
+
+**Files:**
+- `web-admin/src/views/bx/payment/index.vue`
+
+同模式；`payTime` 仅已处理 Tab 有漏斗，藏列时 `watchSortVisibleColumns` 清排序。
+
+```bash
+git commit -m "feat(bx): wire date column sort on payment page."
+```
+
+---
+
+### Task 10: 接线我的发票夹前端
+
+**Files:**
+- `web-admin/src/views/bx/invoice-wallet/mine/index.vue`
+
+发票表与流水表各有 `useServerColumnFilters`。推荐：
+
+- 两套 `useColumnSort`（`invoiceSort` / `ledgerSort`）  
+- `provide` 时按当前 Tab 提供，或给 `ColumnHeaderFilter` 增加可选 `injectKey`（若改组件成本高：切换 Tab 时 `provide` 无法动态——改用 **同一套 sort**，切 Tab 时 `clearSort`，更简单）
+
+**选定更简单：共用一套 `useColumnSort`，切 Tab 时 `clearSort()`，请求分别带 `toSortQueryParams()`。**
+
+```bash
+git commit -m "feat(bx): wire date column sort on my invoice wallet page."
+```
+
+---
+
+### Task 11: 视图三页（合并列表 · 客户端排序）
+
+**Files:**
+- `web-admin/src/views/bx/view/mine/index.vue`
+- `web-admin/src/views/bx/view/todo/index.vue`
+- `web-admin/src/views/bx/view/all/index.vue`
+
+现状：`sortMergedRows` 固定 `applyTime` 倒序。这些页拉全量后合并，**以客户端排序为准**：
+
+```ts
+function sortMergedRows(rows: any[]) {
+  const field = sortField.value || 'applyTime'
+  const order = sortOrder.value || 'desc'
+  return [...rows].sort((a, b) => {
+    const av = String(a[field] || '')
+    const bv = String(b[field] || '')
+    if (!av && !bv) return 0
+    if (!av) return order === 'asc' ? -1 : 1  // 空值：升序前、降序后
+    if (!bv) return order === 'asc' ? 1 : -1
+    const cmp = av.localeCompare(bv)
+    return order === 'asc' ? cmp : -cmp
+  })
+}
+```
+
+仍 `provide('crmColumnSort')` 驱动列头三角；`onChange` → `loadData()`。  
+可选：请求时仍带 `sortField` 给单边 API（非必须，合并后会再排）。
+
+```bash
+git commit -m "feat(bx): wire date column sort on bx view mine/todo/all pages."
+```
+
+---
+
+### Task 12: 回归与图谱
+
+- [ ] **Step 1:** `PYTHONPATH=. pytest tests/test_bx_list_sort.py tests/test_crm_list_sort.py -v`  
+- [ ] **Step 2:** `pnpm dlx vitest run src/composables/useColumnSort.test.ts`  
+- [ ] **Step 3:** 手工：备用金申请 `applyTime`；发放 `issueTime`；报销申请；支付 `payTime`；我的发票夹；我的申请单合并列表；费用项目无三角。  
+- [ ] **Step 4:** `./scripts/update-graph.sh all` 后仅提交图谱变更：
+
+```bash
+git commit -m "chore: update graphify after BX date column sort."
+```
+
+---
+
+## Spec 覆盖自检
+
+| Spec 项 | Task |
+|---------|------|
+| ColumnHeaderFilter 扩展 | 1 |
+| applyTime→create_time 白名单 | 2–5 |
+| 备用金/报销/支付/发票夹 | 3–6, 7–10 |
+| 视图合并页 | 11（客户端排序，符合现网拉全量架构） |
+| 跳过费用项目/工作流/发票夹管理 | 文件结构「不做」 |
+| 空值升降序 | 2 helper + 11 sortMergedRows |
+| 与 CRM 同 inject key | 1, 7–11 |
+
+无 TBD；视图页明确为客户端排序，避免与「整库服务端」表述冲突——spec §7 已提示 union/合并风险，本计划按现网 `fetchAllPagedRecords` 落地。