feat(后端): 新增三模块重构所需DTO

src/CncModels/Dto/Dashboard/ProgramDistributionItem.cs

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+namespace CncModels.Dto.Dashboard
+{
+    /// <summary>
+    /// 程序产量分布项
+    /// </summary>
+    public class ProgramDistributionItem
+    {
+        /// <summary>程序名</summary>
+        public string ProgramName { get; set; }
+
+        /// <summary>总产量</summary>
+        public int TotalQuantity { get; set; }
+
+        /// <summary>产量占比（百分比）</summary>
+        public decimal Percentage { get; set; }
+    }
+}

src/CncModels/Dto/Dashboard/ProgramRankItem.cs

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+namespace CncModels.Dto.Dashboard
+{
+    /// <summary>
+    /// 程序排名项
+    /// </summary>
+    public class ProgramRankItem
+    {
+        /// <summary>排名</summary>
+        public int Rank { get; set; }
+
+        /// <summary>程序名</summary>
+        public string ProgramName { get; set; }
+
+        /// <summary>总产量</summary>
+        public int TotalQuantity { get; set; }
+
+        /// <summary>涉及机床数</summary>
+        public int MachineCount { get; set; }
+    }
+}

src/CncModels/Dto/Machine/CollectRecordQueryRequest.cs

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+using System;
+
+namespace CncModels.Dto.Machine
+{
+    /// <summary>
+    /// 采集记录查询请求
+    /// </summary>
+    public class CollectRecordQueryRequest
+    {
+        /// <summary>机床ID</summary>
+        public int MachineId { get; set; }
+
+        /// <summary>筛选日期，默认今天</summary>
+        public DateTime? Date { get; set; }
+
+        /// <summary>页码</summary>
+        public int Page { get; set; } = 1;
+
+        /// <summary>每页数量</summary>
+        public int PageSize { get; set; } = 20;
+    }
+}

src/CncModels/Dto/Machine/MachineLatestTagItem.cs

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+using System;
+
+namespace CncModels.Dto.Machine
+{
+    /// <summary>
+    /// 机床最新Tag数据项
+    /// </summary>
+    public class MachineLatestTagItem
+    {
+        /// <summary>Tag ID（如 _io_status, Tag5 等）</summary>
+        public string Id { get; set; }
+
+        /// <summary>Tag 描述（如 设备状态、NC程序名）</summary>
+        public string Desc { get; set; }
+
+        /// <summary>Tag 值</summary>
+        public string Value { get; set; }
+
+        /// <summary>采集时间</summary>
+        public DateTime? CollectTime { get; set; }
+    }
+}

src/CncModels/Dto/Production/MachineProductionSummaryResponse.cs

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+namespace CncModels.Dto.Production
+{
+    /// <summary>
+    /// 机床产量汇总响应
+    /// </summary>
+    public class MachineProductionSummaryResponse
+    {
+        /// <summary>总产量</summary>
+        public int TotalQuantity { get; set; }
+
+        /// <summary>运行机床数</summary>
+        public int RunningMachineCount { get; set; }
+
+        /// <summary>平均单机产量</summary>
+        public decimal AvgPerMachine { get; set; }
+
+        /// <summary>最高单产机床</summary>
+        public string TopMachineName { get; set; }
+    }
+}

src/CncModels/Dto/Production/ProgramProductionSummaryResponse.cs

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+namespace CncModels.Dto.Production
+{
+    /// <summary>
+    /// 程序产量汇总响应
+    /// </summary>
+    public class ProgramProductionSummaryResponse
+    {
+        /// <summary>总产量</summary>
+        public int TotalQuantity { get; set; }
+
+        /// <summary>运行程序数</summary>
+        public int RunningProgramCount { get; set; }
+
+        /// <summary>平均单程序产量</summary>
+        public decimal AvgPerProgram { get; set; }
+
+        /// <summary>最高产量程序</summary>
+        public string TopProgramName { get; set; }
+    }
+}

src/CncModels/Dto/Production/WorkerProductionSummaryResponse.cs

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+namespace CncModels.Dto.Production
+{
+    /// <summary>
+    /// 员工产量汇总响应
+    /// </summary>
+    public class WorkerProductionSummaryResponse
+    {
+        /// <summary>总产量</summary>
+        public int TotalQuantity { get; set; }
+
+        /// <summary>活跃员工数</summary>
+        public int ActiveWorkerCount { get; set; }
+
+        /// <summary>人均产量</summary>
+        public decimal AvgPerWorker { get; set; }
+
+        /// <summary>最高产量员工</summary>
+        public string TopWorkerName { get; set; }
+    }
+}