feat(client): 出入库单详情抽屉明细增加生产日期+批次号列（两端，抽屉加宽 660，原型同步）

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

client/lib/models/stock_in.dart

@@ -60,8 +60,9 @@ class StockInItem {
       costPrice: (json['cost_price'] as num?)?.toDouble() ?? 0,
       costAmount: (json['cost_amount'] as num?)?.toDouble() ?? 0,
       returnedQuantity: (json['returned_quantity'] as num?)?.toDouble() ?? 0,
-      batchNo: json['batch_no'] as String?,
-      productionDate: json['production_date'] as String?,
+      // 批次号/生产日期：优先明细行快照，回退 product 关联（对齐 stock_out.dart 写法）
+      batchNo: lineOrProduct('batch_no', 'batch_no'),
+      productionDate: lineOrProduct('production_date', 'production_date'),
       productName: lineOrProduct('product_name', 'name'),
       productCode: lineOrProduct('product_code', 'code'),
       productSeries: lineOrProduct('series', 'series'),

client/lib/screens/stock_in/stock_in_list_screen.dart

@@ -414,7 +414,8 @@ class _StockInListScreenState extends ConsumerState<StockInListScreen> {
                     // 下拉刷新 = 桌面「刷新」
                     onRefresh: () async {
                       ref.read(stockInListProvider.notifier).reload();
-                      await Future<void>.delayed(const Duration(milliseconds: 600));
+                      await Future<void>.delayed(
+                          const Duration(milliseconds: 600));
                     },
                     mobileCards:
                         orders.map((o) => _orderCard(context, o)).toList(),
@@ -995,6 +996,10 @@ class _StockInListScreenState extends ConsumerState<StockInListScreen> {
                 price: it.costPrice == 0 ? '待定价' : _num.format(it.costPrice),
                 amount: it.costAmount == 0 ? '待定价' : _num.format(it.costAmount),
                 pending: it.costPrice == 0,
+                productionDate: it.productionDate != null
+                    ? it.productionDate!.substring(0, 10)
+                    : null,
+                batchNo: it.batchNo,
               ))
           .toList(),
       totalText: o.costTotal != null ? _money.format(o.costTotal) : '—',

client/lib/screens/stock_out/stock_out_list_screen.dart

@@ -1076,6 +1076,10 @@ class _StockOutListScreenState extends ConsumerState<StockOutListScreen> {
           cost: admin ? _num.format(it.costPrice) : null,
           profit: admin ? (pending ? '待定价' : _num.format(profit)) : null,
           pending: pending,
+          productionDate: it.productionDate != null
+              ? it.productionDate!.substring(0, 10)
+              : null,
+          batchNo: it.batchNo,
         );
       }).toList(),
       totalText: o.saleTotal != null ? _money.format(o.saleTotal) : '—',

client/lib/widgets/order_detail_drawer.dart

@@ -41,7 +41,7 @@ Future<T?> showOrderDetailDrawer<T>(
     barrierColor: _kDrawerMask,
     transitionDuration: const Duration(milliseconds: 250),
     pageBuilder: (ctx, _, __) {
-      final w = math.min(600.0, MediaQuery.of(ctx).size.width * 0.94);
+      final w = math.min(660.0, MediaQuery.of(ctx).size.width * 0.94);
       return Align(
         alignment: Alignment.centerRight,
         child: Material(
@@ -63,7 +63,8 @@ Future<T?> showOrderDetailDrawer<T>(
   );
 }
 
-/// 抽屉明细行（对齐原型 .lines .lr，5 列：商品·编码 / 系列·规格 / 数量 / 单价 / 金额）。
+/// 抽屉明细行（对齐原型 .lines .lr，入库 6 列 / 出库管理员 8 列：
+/// 商品·编码 / 系列·规格 / 生产日期·批次号 / 数量 / 单价(/成本价/售价/总售价) / 利润）。
 class OrderLine {
   final String name;
   final String code;
@@ -77,6 +78,9 @@ class OrderLine {
   final String? cost;
   final String? profit;
   final bool pending; // 单价<=0：单价/金额显示待定价样式
+  // 生产日期 / 批次号（2026-07-14，出入库单详情明细新增双行列）
+  final String? productionDate;
+  final String? batchNo;
   const OrderLine({
     required this.name,
     required this.code,
@@ -88,6 +92,8 @@ class OrderLine {
     this.cost,
     this.profit,
     this.pending = false,
+    this.productionDate,
+    this.batchNo,
   });
 }
 
@@ -327,8 +333,11 @@ class OrderDetailDrawer extends StatelessWidget {
     );
   }
 
-  /// 窄屏明细行（原型：左 商品名 + 系列·×数量 小字，右 金额 mono / 待定价徽章）。
+  /// 窄屏明细行（原型：左 商品名 + 系列·×数量 小字，中 生产日期/批次号双行列
+  /// （两值都空则不渲染，避免空占位），右 金额 mono / 待定价徽章）。
   Widget _mLineRow(dynamic t, OrderLine l, bool last) {
+    final hasDateBatch = (l.productionDate?.isNotEmpty ?? false) ||
+        (l.batchNo?.isNotEmpty ?? false);
     return Container(
       padding: const EdgeInsets.symmetric(vertical: 11),
       decoration: last
@@ -351,6 +360,30 @@ class OrderDetailDrawer extends StatelessWidget {
               ],
             ),
           ),
+          if (hasDateBatch) ...[
+            const SizedBox(width: 10),
+            Column(
+              crossAxisAlignment: CrossAxisAlignment.end,
+              mainAxisSize: MainAxisSize.min,
+              children: [
+                Text(
+                    (l.productionDate?.isNotEmpty ?? false)
+                        ? l.productionDate!
+                        : '—',
+                    style: TextStyle(
+                        fontSize: AppDims.fsSm,
+                        fontFamily: AppFonts.mono,
+                        fontFamilyFallback: AppFonts.monoFallback,
+                        color: t.text)),
+                Text((l.batchNo?.isNotEmpty ?? false) ? l.batchNo! : '—',
+                    style: TextStyle(
+                        fontSize: AppDims.fsXs,
+                        fontFamily: AppFonts.mono,
+                        fontFamilyFallback: AppFonts.monoFallback,
+                        color: t.faint)),
+              ],
+            ),
+          ],
           const SizedBox(width: 10),
           l.pending
               ? const DsTextIconBadge('待定价')
@@ -450,6 +483,7 @@ class _LinesTable extends StatelessWidget {
               c1: Text('商品 · 编码',
                   style: _hStyle(t), overflow: TextOverflow.ellipsis),
               c2: Text('系列 / 规格', style: _hStyle(t)),
+              cDate: Text('生产日期 / 批次号', style: _hStyle(t)),
               c3: Text('数量', textAlign: TextAlign.right, style: _hStyle(t)),
               c4: _withProfit
                   ? Text('成本价', textAlign: TextAlign.right, style: _hStyle(t))
@@ -506,6 +540,30 @@ class _LinesTable extends StatelessWidget {
                             TextStyle(fontSize: AppDims.fsXs, color: t.muted)),
                   ],
                 ),
+                cDate: Column(
+                  crossAxisAlignment: CrossAxisAlignment.start,
+                  mainAxisSize: MainAxisSize.min,
+                  children: [
+                    Text(
+                        (lines[i].productionDate?.isNotEmpty ?? false)
+                            ? lines[i].productionDate!
+                            : '—',
+                        style: TextStyle(
+                            fontSize: AppDims.fsSm,
+                            fontFamily: AppFonts.mono,
+                            fontFamilyFallback: AppFonts.monoFallback,
+                            color: t.text)),
+                    Text(
+                        (lines[i].batchNo?.isNotEmpty ?? false)
+                            ? lines[i].batchNo!
+                            : '—',
+                        style: TextStyle(
+                            fontSize: AppDims.fsXs,
+                            fontFamily: AppFonts.mono,
+                            fontFamilyFallback: AppFonts.monoFallback,
+                            color: t.faint)),
+                  ],
+                ),
                 c3: Text(lines[i].qty,
                     textAlign: TextAlign.right,
                     style: const TextStyle(
@@ -557,11 +615,12 @@ class _LinesTable extends StatelessWidget {
             color: accent ? t.text : t.text));
   }
 
-  // 5 列布局（对齐原型 grid 1fr 124 40 64 78）；c6/c7 非空时为出库 7 列形态
-  // （数量/成本价/售价/总售价/利润，数值列等宽收窄）。
+  // 6 列布局（入库，对齐原型 grid 1fr 110 72 40 64 78）；c6/c7 非空时为出库
+  // 8 列形态（商品/系列规格/生产日期批次号/数量/成本价/售价/总售价/利润，数值列等宽收窄）。
   Widget _lineRow(BuildContext context,
       {required Widget c1,
       required Widget c2,
+      required Widget cDate,
       required Widget c3,
       required Widget c4,
       required Widget c5,
@@ -573,15 +632,18 @@ class _LinesTable extends StatelessWidget {
       children: [
         Expanded(child: c1),
         const SizedBox(width: 8),
-        // 5 列（入库）时中间列加宽左移：商品列不再吃掉全部余宽，
+        // 6 列（入库）时中间列加宽左移：商品列不再吃掉全部余宽，
         // 「进价（单瓶）」表头一行放得下（2026-07-03 用户反馈）。
-        SizedBox(width: wide ? 100 : 124, child: c2),
+        // 2026-07-14：新增「生产日期/批次号」列，入库侧挤压 124→110、88→78 腾位。
+        SizedBox(width: wide ? 100 : 110, child: c2),
+        const SizedBox(width: 8),
+        SizedBox(width: 72, child: cDate),
         const SizedBox(width: 8),
         SizedBox(width: wide ? 32 : 40, child: c3),
         const SizedBox(width: 8),
-        SizedBox(width: wide ? 62 : 88, child: c4),
+        SizedBox(width: wide ? 62 : 78, child: c4),
         const SizedBox(width: 8),
-        SizedBox(width: wide ? 62 : 88, child: c5),
+        SizedBox(width: wide ? 62 : 78, child: c5),
         if (c6 != null) ...[
           const SizedBox(width: 8),
           SizedBox(width: 62, child: c6),