新增生产-前缫看台记录，并导入车头工/挡车工看台记录历史数据

功能：
- 后端新增 KtjlCtgs / KtjlDcgs 两张表、KtjlService 与 api/prod/ktjl 接口
  （按日期+车间+班次查询、整组先删后建保存、整组删除、按看台排班带出默认记录、工种下拉）
- 挡车数按 F9 口径自动重算（与他人接壤的边界车位各扣 0.5），机组由车位反查机组车台
- 前端新增 /prod/qianxian/ktjl 看台记录页：挡车工/车头工双页签、删除、录入(新增)、录入(指定日期)
- 录入弹窗校验对齐 F9：个人时长不超标准、挡车数/看台时长匹配、车头工每机组≥2 人且时长为标准时长整数倍
- 生产-前缫菜单新增「看台记录」，权限 prod:ktjl:list

数据导入：
- 新增内嵌资源 biz_prod_qs_ktjl_ctg.csv / biz_prod_qs_ktjl_dcg.csv（约 5 万行，采用紧凑 CSV）
- 剔除软删除行、日期异常行、部门无法映射与职工不存在的行；日期由 Excel 序列号转换
- 车头工 12693 行、挡车工 38048 行入库，日期范围 2025-12-16 ~ 2026-09-11
- 表内已有数据则整体跳过，分批 1000 行插入

其他：同步工作进度-13 文档与开发数据库快照

backend/F9WebAiTest.Application/Dtos/Prod/KtjlDtos.cs

@@ -0,0 +1,67 @@
+using F9WebAiTest.Domain.Enums.SYS.Employees;
+
+namespace F9WebAiTest.Application.Dtos.Prod;
+
+// ==================== 车头工看台记录 ====================
+
+public class KtjlctgReadDto_View
+{
+    public long Id { get; set; }
+    public DateTime Date { get; set; }
+    public long DepId { get; set; }
+    public string DepName { get; set; } = "";
+    public Prod_Banci_Enum Banci { get; set; }
+    public string BanciName { get; set; } = "";
+    public int Jizu { get; set; }
+    public decimal Hours { get; set; }
+    public long EmployeeId { get; set; }
+    public string EmployeeName { get; set; } = "";
+    public long EmployeeDepId { get; set; }
+    public string EmployeeDepName { get; set; } = "";
+    public long WorktypeId { get; set; }
+    public string WorktypeName { get; set; } = "";
+    public bool NoChanliang { get; set; }
+}
+
+// ==================== 挡车工看台记录 ====================
+
+public class KtjldcgReadDto_View
+{
+    public long Id { get; set; }
+    public DateTime Date { get; set; }
+    public long DepId { get; set; }
+    public string DepName { get; set; } = "";
+    public Prod_Banci_Enum Banci { get; set; }
+    public string BanciName { get; set; } = "";
+    public int Jizu { get; set; }
+    public int ChetaiStart { get; set; }
+    public int ChetaiEnd { get; set; }
+    public decimal DangcheNum { get; set; }
+    public decimal Hours { get; set; }
+    public long EmployeeId { get; set; }
+    public string EmployeeName { get; set; } = "";
+    public long EmployeeDepId { get; set; }
+    public string EmployeeDepName { get; set; } = "";
+    public long WorktypeId { get; set; }
+    public string WorktypeName { get; set; } = "";
+    public bool NoChanliang { get; set; }
+}
+
+// ==================== 整组保存 ====================
+
+/// <summary>看台记录整组保存（按 日期+车间+班次 先删后建，对齐 F9 的 SaveCommand）</summary>
+public class KtjlctgBatchDto
+{
+    public DateTime Date { get; set; }
+    public long DepId { get; set; }
+    public Prod_Banci_Enum Banci { get; set; }
+    public List<KtjlctgReadDto_View> Items { get; set; } = new();
+}
+
+public class KtjldcgBatchDto
+{
+    public DateTime Date { get; set; }
+    public long DepId { get; set; }
+    public Prod_Banci_Enum Banci { get; set; }
+    public List<KtjldcgReadDto_View> Items { get; set; } = new();
+}