feat: add work_order_no display to boxing module

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

docs/plans/2026-05-12-work-order-no-display.md

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+# 工令号显示功能 Implementation Plan
+
+> **For Claude:** REQUIRED SUB-SKILL: Use superpowers:executing-plans to implement this plan task-by-task.
+
+**Goal:** 在装箱编号模块的信息区增加工令号（work_order_no）显示，采用"字段名称一行、实际值一行"的两行布局，排产号和工令号并排展示。
+
+**Architecture:** 后端从 ERP 视图 `vw_productionContractData` 额外查询 `工令号` 列，通过已有的 `/box/info` 接口返回给前端。Flutter 端解析后渲染为两行布局（标签行 + 值行）。
+
+**Tech Stack:** FastAPI + SQLAlchemy (后端), Flutter (前端), PostgreSQL (连接 ERP 视图)
+
+---
+
+## 步骤一：FastAPI 后端
+
+### Task 1: 扩展 ERP 查询 SQL，增加工令号字段
+
+**Files:**
+- Modify: `services/fastapi/app/services/box_service.py:46-59`
+
+**Step 1: 修改 `_erp_info_sql` 函数**
+
+将 SQL 查询从 3 列扩展为 4 列，增加 `工令号`。
+
+```python
+def _erp_info_sql(db: Session) -> str:
+    dialect_name = db.bind.dialect.name if db.bind is not None else ""
+    if dialect_name == "postgresql":
+        return (
+            'SELECT "总排号", "排产号", "数量", "工令号" '
+            'FROM "ERPAuto"."vw_productionContractData" '
+            'WHERE "总排号" = :zongpai_no '
+            "LIMIT 1"
+        )
+    return (
+        "SELECT TOP 1 [总排号], [排产号], [数量], [工令号] "
+        "FROM [ERPAuto].[vw_productionContractData] "
+        "WHERE [总排号] = :zongpai_no"
+    )
+```
+
+**Step 2: 修改 `query_erp_info` 函数**
+
+在返回字典中增加 `work_order_no` 字段。
+
+```python
+def query_erp_info(db: Session, zongpai_no: str) -> dict:
+    """从 ERP 视图查询总排号对应的排产号、工令号和数量。"""
+    sql = text(_erp_info_sql(db))
+    row = db.execute(sql, {"zongpai_no": zongpai_no}).fetchone()
+    if not row:
+        raise ZongpaiNotFoundError()
+    return {
+        "zongpai_no": row[0],
+        "paichan_no": row[1],
+        "quantity": int(row[2]),
+        "work_order_no": row[3],
+    }
+```
+
+**Step 3: 修改 `get_box_info` 函数的返回值**
+
+在返回字典中增加 `work_order_no`。
+
+```python
+return {
+    "zongpai_no": zongpai_no,
+    "paichan_no": paichan_no,
+    "work_order_no": erp["work_order_no"],
+    "quantity": quantity,
+    "existing_boxes": existing_boxes,
+    "max_box_no": max_box_no,
+    "suggested_box_no": max_box_no + 1,
+}
+```
+
+**Step 4: 验证**
+
+启动服务，用 curl 或浏览器测试：
+```bash
+curl "http://localhost:8000/CargoTrace/box/info?zongpai_no=26BW0011"
+```
+
+预期响应中包含 `"work_order_no": "6-1(7)"`。
+
+---
+
+### Task 2: 更新 Pydantic Schema
+
+**Files:**
+- Modify: `services/fastapi/app/schemas/box.py:20-27`
+
+**Step 1: 在 `BoxInfoResponse` 中增加 `work_order_no` 字段**
+
+```python
+class BoxInfoResponse(BaseModel):
+    """GET /box/info 响应"""
+    zongpai_no: str
+    paichan_no: str
+    work_order_no: str | None = None
+    quantity: int
+    existing_boxes: list[BoxDetail]
+    max_box_no: int
+    suggested_box_no: int
+```
+
+**Step 2: 验证 API 文档**
+
+启动服务后访问 `http://localhost:8000/docs`，确认 `BoxInfoResponse` 包含 `work_order_no` 字段。
+
+---
+
+### Task 3: 更新测试
+
+**Files:**
+- Modify: `services/fastapi/tests/test_box_api.py:7-19`
+
+**Step 1: 在 `test_box_info_success` 中增加 `work_order_no` 断言**
+
+```python
+def test_box_info_success(client: TestClient):
+    """查询真实存在的总排号 → 200"""
+    resp = client.get(
+        "/CargoTrace/box/info", params={"zongpai_no": "26BW0011"}
+    )
+    assert resp.status_code == 200
+    data = resp.json()
+    assert data["zongpai_no"] == "26BW0011"
+    assert data["paichan_no"] == "W00009"
+    assert data["work_order_no"] is not None
+    assert isinstance(data["work_order_no"], str)
+    assert data["quantity"] == 80
+    assert "existing_boxes" in data
+    assert "max_box_no" in data
+    assert data["suggested_box_no"] == data["max_box_no"] + 1
+```
+
+**Step 2: 运行测试验证**
+
+```bash
+cd services/fastapi
+source ../../.venv/Scripts/activate  # 或项目虚拟环境
+pytest tests/test_box_api.py -v
+```
+
+预期：`test_box_info_success` 通过，`work_order_no` 有值。
+
+**Step 3: 格式化代码**
+
+```bash
+black app/services/box_service.py app/schemas/box.py tests/test_box_api.py
+```
+
+**Step 4: 提交**
+
+```bash
+git add services/fastapi/app/services/box_service.py services/fastapi/app/schemas/box.py services/fastapi/tests/test_box_api.py
+git commit -m "feat(box): add work_order_no to box info API response"
+```
+
+---
+
+## 步骤二：Flutter 应用
+
+### Task 4: 扩展 API 数据模型
+
+**Files:**
+- Modify: `apps/pad_scanner/lib/services/api_service.dart:66-107`
+
+**Step 1: 在 `BoxInfoResult` 中增加 `workOrderNo` 字段**
+
+```dart
+class BoxInfoResult {
+  final bool success;
+  final String? errorMessage;
+  final String? zongpaiNo;
+  final String? paichanNo;
+  final String? workOrderNo;
+  final int? quantity;
+  final List<BoxDetailData> existingBoxes;
+  final int maxBoxNo;
+  final int suggestedBoxNo;
+
+  BoxInfoResult({
+    required this.success,
+    this.errorMessage,
+    this.zongpaiNo,
+    this.paichanNo,
+    this.workOrderNo,
+    this.quantity,
+    this.existingBoxes = const [],
+    this.maxBoxNo = 0,
+    this.suggestedBoxNo = 1,
+  });
+
+  factory BoxInfoResult.ok(Map<String, dynamic> json) {
+    final boxes =
+        (json['existing_boxes'] as List<dynamic>?)
+            ?.map((b) => BoxDetailData.fromJson(b as Map<String, dynamic>))
+            .toList() ??
+        [];
+    return BoxInfoResult(
+      success: true,
+      zongpaiNo: json['zongpai_no'] as String?,
+      paichanNo: json['paichan_no'] as String?,
+      workOrderNo: json['work_order_no'] as String?,
+      quantity: json['quantity'] as int?,
+      existingBoxes: boxes,
+      maxBoxNo: json['max_box_no'] as int? ?? 0,
+      suggestedBoxNo: json['suggested_box_no'] as int? ?? 1,
+    );
+  }
+
+  factory BoxInfoResult.error(String message) {
+    return BoxInfoResult(success: false, errorMessage: message);
+  }
+}
+```
+
+**Step 2: 验证编译通过**
+
+```bash
+cd apps/pad_scanner
+flutter analyze lib/services/api_service.dart
+```
+
+---
+
+### Task 5: 更新 BoxingPage 状态管理
+
+**Files:**
+- Modify: `apps/pad_scanner/lib/pages/boxing_page.dart`
+
+**Step 1: 增加状态变量**
+
+在 `_BoxingPageState` 的状态变量区域（约第 51 行之后），增加：
+
+```dart
+// 工令号（来自后端查询）
+String? _workOrderNo;
+```
+
+**Step 2: 更新 `_resetState` 方法**
+
+在 `_resetState` 中增加清除 `work_order_no`：
+
+```dart
+void _resetState() {
+    _phase = _Phase.waiting;
+    _zongpaiNo = null;
+    _paichanNo = null;
+    _workOrderNo = null;  // 新增
+    _erpQuantity = null;
+    // ... 其余不变
+}
+```
+
+**Step 3: 更新 `_queryBoxInfo` 中的 setState**
+
+在 `_queryBoxInfo` 方法的 `setState` 块中增加赋值：
+
+```dart
+setState(() {
+    _zongpaiNo = zongpai;
+    _paichanNo = result.paichanNo;
+    _workOrderNo = result.workOrderNo;  // 新增
+    _erpQuantity = result.quantity;
+    // ... 其余不变
+});
+```
+
+---
+
+### Task 6: 重写信息区 UI — 两行布局
+
+**Files:**
+- Modify: `apps/pad_scanner/lib/pages/boxing_page.dart` (`_buildInfoArea` 方法，约第 659-744 行)
+
+**Step 1: 用新布局替换整个 `_buildInfoArea` 方法**
+
+将原来的 `排产号标签 → 排产号值 → 已有箱数/最大箱号` 布局，改为：
+- 第一行：`排产号：` + `工令号：`（标签行）
+- 第二行：`W00009` + `6-1(7)`（值行）
+- 第三行：`已有箱数：3箱  最大箱号：3` + `详情 →`（不变）
+
+```dart
+Widget _buildInfoArea(bool isWaiting, ColorScheme colorScheme) {
+    final grey = isWaiting;
+
+    return Column(
+      crossAxisAlignment: CrossAxisAlignment.start,
+      children: [
+        // 字段名称行：排产号 + 工令号
+        Row(
+          children: [
+            Text(
+              '排产号：',
+              style: TextStyle(
+                fontSize: 13,
+                color: grey ? Colors.grey : Colors.black54,
+              ),
+            ),
+            const SizedBox(width: 24),
+            Text(
+              '工令号：',
+              style: TextStyle(
+                fontSize: 13,
+                color: grey ? Colors.grey : Colors.black54,
+              ),
+            ),
+          ],
+        ),
+        const SizedBox(height: 2),
+        // 实际值行
+        Row(
+          children: [
+            Expanded(
+              child: Text(
+                _paichanNo ?? '--',
+                style: TextStyle(
+                  fontSize: 16,
+                  fontWeight: FontWeight.w600,
+                  color: grey ? Colors.grey : Colors.black87,
+                ),
+                overflow: TextOverflow.ellipsis,
+              ),
+            ),
+            Expanded(
+              child: Text(
+                _workOrderNo ?? '--',
+                style: TextStyle(
+                  fontSize: 14,
+                  color: grey ? Colors.grey : Colors.black87,
+                ),
+                overflow: TextOverflow.ellipsis,
+              ),
+            ),
+          ],
+        ),
+        const SizedBox(height: 8),
+
+        // 已有箱数 + 最大箱号 + 详情按钮（不变）
+        Row(
+          children: [
+            Expanded(
+              child: Row(
+                children: [
+                  Text(
+                    '已有箱数：',
+                    style: TextStyle(
+                      fontSize: 13,
+                      color: grey ? Colors.grey : Colors.black54,
+                    ),
+                  ),
+                  Text(
+                    grey ? '--' : '${_existingBoxes.length}箱',
+                    style: TextStyle(
+                      fontSize: 13,
+                      fontWeight: FontWeight.w600,
+                      color: grey ? Colors.grey : Colors.black87,
+                    ),
+                  ),
+                  const SizedBox(width: 16),
+                  Text(
+                    '最大箱号：',
+                    style: TextStyle(
+                      fontSize: 13,
+                      color: grey ? Colors.grey : Colors.black54,
+                    ),
+                  ),
+                  Text(
+                    grey ? '--' : '$_maxBoxNo',
+                    style: TextStyle(
+                      fontSize: 13,
+                      fontWeight: FontWeight.w600,
+                      color: _maxBoxNo > 0
+                          ? Colors.amber.shade800
+                          : Colors.grey,
+                    ),
+                  ),
+                ],
+              ),
+            ),
+            TextButton(
+              onPressed: grey || _existingBoxes.isEmpty ? null : _openDetail,
+              style: TextButton.styleFrom(
+                padding: const EdgeInsets.symmetric(horizontal: 8),
+                minimumSize: Size.zero,
+                tapTargetSize: MaterialTapTargetSize.shrinkWrap,
+              ),
+              child: Text(
+                '详情 →',
+                style: TextStyle(
+                  fontSize: 13,
+                  color: grey || _existingBoxes.isEmpty
+                      ? Colors.grey.shade400
+                      : colorScheme.primary,
+                ),
+              ),
+            ),
+          ],
+        ),
+      ],
+    );
+  }
+```
+
+**Step 2: 验证编译和静态分析**
+
+```bash
+cd apps/pad_scanner
+flutter analyze lib/pages/boxing_page.dart
+```
+
+预期：无错误。
+
+---
+
+### Task 7: 构建、安装并手动验证
+
+**Step 1: 构建 APK**
+
+```bash
+cd apps/pad_scanner
+flutter build apk --release
+```
+
+**Step 2: 安装到设备**
+
+```bash
+adb install -r build/app/outputs/flutter-apk/app-release.apk
+```
+
+**Step 3: 手动验证**
+
+在设备上操作：
+1. 进入装箱编号页面
+2. 确认等待状态下信息区显示 `排产号：` 和 `工令号：` 标签并排，值均为 `--`
+3. 扫描一个真实的执行卡（如 `26BW0011`）
+4. 确认信息区显示：
+   - 标签行：`排产号：` | `工令号：`
+   - 值行：`W00009`（加粗）| `6-1(7)`（常规）
+5. 在三种模式下分别测试确认布局正确
+
+**Step 4: 提交**
+
+```bash
+git add apps/pad_scanner/lib/services/api_service.dart apps/pad_scanner/lib/pages/boxing_page.dart
+git commit -m "feat(boxing): display work order number in info area with two-row layout"
+```