feat(client): 出库明细成本/售价/利润三列重设计 + 建单利润列 + 入库列头统一

- 出库详情抽屉（管理员）：数量/成本价/售价/利润 + 合计金额/合计利润 双行；
  operator 见 售价/小计（服务端抹零+前端隐藏双保险）；利润负数 danger
- 出库建单：商品名称下带编码（字体同系列列）；金额列→利润列（实时）；
  底栏合计利润（仅管理员）；进价列仅管理员；提交发新 key（cost_price/sale_price）
- 入库建单列头：进价（单瓶）/ 参考售价 / 总进价
- 退单弹窗金额改售价口径（与冲应收一致）；打印保留待定价回退成本兼容
- models 字段随后端消歧改名；golden 重打；新增抽屉双形态 widget 测试

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

client/test/golden/stock_in_list_golden_test.dart

@@ -26,7 +26,7 @@ const _orders = [
       reviewerName: '张管理',
       status: 'approved',
       orderDate: '2026-06-20',
-      totalAmount: 34320),
+      costTotal: 34320),
   StockInOrder(
       id: 2,
       orderNo: 'RK-20260618-009',
@@ -36,7 +36,7 @@ const _orders = [
       operatorName: '李销售',
       status: 'pending',
       orderDate: '2026-06-18',
-      totalAmount: 6700),
+      costTotal: 6700),
   StockInOrder(
       id: 3,
       orderNo: 'RK-20260615-003',
@@ -46,7 +46,7 @@ const _orders = [
       operatorName: '王经理',
       status: 'draft',
       orderDate: '2026-06-15',
-      totalAmount: 5000),
+      costTotal: 5000),
   StockInOrder(
       id: 4,
       orderNo: 'RK-20260612-001',
@@ -57,7 +57,7 @@ const _orders = [
       reviewerName: '张管理',
       status: 'rejected',
       orderDate: '2026-06-12',
-      totalAmount: 3500),
+      costTotal: 3500),
 ];
 
 class _FakeStockInNotifier extends StockInListNotifier {

client/test/golden/stock_out_list_golden_test.dart

@@ -26,7 +26,7 @@ const _orders = [
       reviewerName: '张管理',
       status: 'approved',
       orderDate: '2026-06-20',
-      totalAmount: 12800),
+      saleTotal: 12800),
   StockOutOrder(
       id: 2,
       orderNo: 'CK-20260618-022',
@@ -36,7 +36,7 @@ const _orders = [
       operatorName: '张前台',
       status: 'pending',
       orderDate: '2026-06-18',
-      totalAmount: 5400),
+      saleTotal: 5400),
   StockOutOrder(
       id: 3,
       orderNo: 'CK-20260615-017',
@@ -46,7 +46,7 @@ const _orders = [
       operatorName: '李销售',
       status: 'draft',
       orderDate: '2026-06-15',
-      totalAmount: 3200),
+      saleTotal: 3200),
   StockOutOrder(
       id: 4,
       orderNo: 'CK-20260612-009',
@@ -57,7 +57,7 @@ const _orders = [
       reviewerName: '张管理',
       status: 'rejected',
       orderDate: '2026-06-12',
-      totalAmount: 1960),
+      saleTotal: 1960),
 ];
 
 class _FakeStockOutNotifier extends StockOutListNotifier {