feat(client): 登录/注册页照原型重建，ds 真相源组件族统一全部屏

- 登录/注册（login.html/register.html 1:1）：两栏卡片+品牌渐变面板+主题小衣服
  pill（onSurface 变体）+记住我（记录并预填最近账号）+原型式 toast 校验；
  登录 fidelity 1.4–2.1% 三主题全绿；注册暂不入闸（少 门店编号/兑换券 字段，
  已记 CONTRACT，screens.mjs 留存根）
- ds 原子补齐：DsToast（.toast 单例）/DsCheck（.check/.agree）/DsButton lg 档/
  DsSelect 替换全部旧 DropdownButton/DsField label 在上/DsInput 后缀与密码形态
- 全屏统一：对话框按钮全 DsButton、盒式输入主题钉死（visualDensity.standard、
  h38、InputDecorationTheme 渗漏修复）、图标全 lucide、JetBrains Mono 三端同源、
  BrandMark 真相源 logo、只读模式写操作全量守卫（WriteGuard+DsToast）
- 出入库列表：版式对齐原型（卡片对齐+搜索框居中）、KPI 近30天滚动、结清后
  失效财务应收应付表；商品编辑抽屉介绍库改搜索下拉、图片双击全屏预览
- 删除旧 UI 死代码：DataTableCard/FormDialog/PageScaffold/SearchChip/
  SelectProductDialog/tabStateProvider
- golden/fidelity：stock-in/out 补注册（9%）、login 入册（8%）、goldens 全量重打；
  修复 pubspec flutter_web_plugins 非法声明（CI pub get 阻断）

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01JJ1g8XV1YhhmHRzhwWEW7o

client/lib/models/stock_out.dart

@@ -46,25 +46,25 @@ class StockOutItem {
     }
 
     return StockOutItem(
-        id: json['id'] != null ? (json['id'] as num).toInt() : null,
-        orderId: json['order_id'] != null
-            ? (json['order_id'] as num).toInt()
-            : null,
-        productId: (json['product_id'] as num).toInt(),
-        quantity: (json['quantity'] as num).toDouble(),
-        unitPrice: (json['unit_price'] as num).toDouble(),
-        salePrice: (json['sale_price'] as num?)?.toDouble() ?? 0,
-        totalPrice: (json['total_price'] as num).toDouble(),
-        returnedQuantity: (json['returned_quantity'] as num?)?.toDouble() ?? 0,
-        productName: lineOrProduct('product_name', 'name'),
-        productCode: lineOrProduct('product_code', 'code'),
-        productSeries: lineOrProduct('series', 'series'),
-        productSpec: lineOrProduct('spec', 'spec'),
-        productUnit: (json['product'] as Map<String, dynamic>?)?['unit'] as String?,
-        // 批次号/生产日期：优先明细行快照，回退 product 关联（App 新建单据快照列常为空）
-        batchNo: lineOrProduct('batch_no', 'batch_no'),
-        productionDate: lineOrProduct('production_date', 'production_date'),
-      );
+      id: json['id'] != null ? (json['id'] as num).toInt() : null,
+      orderId:
+          json['order_id'] != null ? (json['order_id'] as num).toInt() : null,
+      productId: (json['product_id'] as num).toInt(),
+      quantity: (json['quantity'] as num).toDouble(),
+      unitPrice: (json['unit_price'] as num).toDouble(),
+      salePrice: (json['sale_price'] as num?)?.toDouble() ?? 0,
+      totalPrice: (json['total_price'] as num).toDouble(),
+      returnedQuantity: (json['returned_quantity'] as num?)?.toDouble() ?? 0,
+      productName: lineOrProduct('product_name', 'name'),
+      productCode: lineOrProduct('product_code', 'code'),
+      productSeries: lineOrProduct('series', 'series'),
+      productSpec: lineOrProduct('spec', 'spec'),
+      productUnit:
+          (json['product'] as Map<String, dynamic>?)?['unit'] as String?,
+      // 批次号/生产日期：优先明细行快照，回退 product 关联（App 新建单据快照列常为空）
+      batchNo: lineOrProduct('batch_no', 'batch_no'),
+      productionDate: lineOrProduct('production_date', 'production_date'),
+    );
   }
 }
 
@@ -116,19 +116,23 @@ class StockOutOrder {
         orderNo: json['order_no'] as String,
         type: json['type'] as String?,
         warehouseId: (json['warehouse_id'] as num).toInt(),
-        warehouseName: (json['warehouse'] as Map<String, dynamic>?)?['name'] as String?,
+        warehouseName:
+            (json['warehouse'] as Map<String, dynamic>?)?['name'] as String?,
         partnerId: json['partner_id'] != null
             ? (json['partner_id'] as num).toInt()
             : null,
-        partnerName: (json['partner'] as Map<String, dynamic>?)?['name'] as String?,
+        partnerName:
+            (json['partner'] as Map<String, dynamic>?)?['name'] as String?,
         operatorId: json['operator_id'] != null
             ? (json['operator_id'] as num).toInt()
             : null,
-        operatorName: (json['operator'] as Map<String, dynamic>?)?['real_name'] as String?,
+        operatorName: (json['operator'] as Map<String, dynamic>?)?['real_name']
+            as String?,
         reviewerId: json['reviewer_id'] != null
             ? (json['reviewer_id'] as num).toInt()
             : null,
-        reviewerName: (json['reviewer'] as Map<String, dynamic>?)?['real_name'] as String?,
+        reviewerName: (json['reviewer'] as Map<String, dynamic>?)?['real_name']
+            as String?,
         status: json['status'] as String,
         returnState: json['return_state'] as String? ?? 'none',
         orderDate: json['order_date'] as String?,
@@ -140,8 +144,7 @@ class StockOutOrder {
         remark: json['remark'] as String?,
         items: json['items'] != null
             ? (json['items'] as List)
-                .map((e) =>
-                    StockOutItem.fromJson(e as Map<String, dynamic>))
+                .map((e) => StockOutItem.fromJson(e as Map<String, dynamic>))
                 .toList()
             : [],
       );