设备管理模块方法转换为DTO模式，修复long类型接收雪花ID丢失精度的问题

Model/Dto/Asset/EquipmentAttachmentDto.cs

@@ -16,8 +16,8 @@ namespace Model.Dto.Asset
         /// <summary>创建时间</summary>
         public DateTime? CreateTime { get; set; }
 
-        /// <summary>设备Id（关联 EquipmentEntity.Id）</summary>
-        public long EquipmentId { get; set; }
+        /// <summary>设备Id（关联 EquipmentEntity.Id，雪花 Id 转 string 防精度丢失）</summary>
+        public string EquipmentId { get; set; }
 
         /// <summary>文件名称</summary>
         public string? FileName { get; set; }

Model/Dto/Asset/EquipmentCategoryDto.cs

@@ -14,8 +14,8 @@ namespace Model.Dto.Asset
         /// <summary>创建时间</summary>
         public DateTime? CreateTime { get; set; }
 
-        /// <summary>父级分类Id（0表示顶级）</summary>
-        public long ParentId { get; set; }
+        /// <summary>父级分类Id（0表示顶级，雪花 Id 转 string 防精度丢失）</summary>
+        public string ParentId { get; set; }
 
         /// <summary>分类名称</summary>
         public string? Name { get; set; }

Model/Dto/Asset/EquipmentDto.cs

@@ -7,8 +7,8 @@ namespace Model.Dto.Asset
     /// </summary>
     public class EquipmentDto
     {
-        /// <summary>主键 Id（long → string）</summary>
-        public string Id { get; set; }
+        /// <summary>主键 Id（long → string；入参可空，新增时无需传递）</summary>
+        public string? Id { get; set; }
 
         /// <summary>删除状态（0、未删除；1、已删除）</summary>
         public byte IsDel { get; set; }
@@ -22,8 +22,8 @@ namespace Model.Dto.Asset
         /// <summary>设备名称</summary>
         public string? Name { get; set; }
 
-        /// <summary>设备分类Id（关联 EquipmentCategoryEntity.Id）</summary>
-        public long CategoryId { get; set; }
+        /// <summary>设备分类Id（关联 EquipmentCategoryEntity.Id，雪花 Id 转 string 防精度丢失；可空，未分类时为 "0" 或不传）</summary>
+        public string? CategoryId { get; set; }
 
         /// <summary>设备类型</summary>
         public string? Type { get; set; }

Model/Dto/Asset/EquipmentStatusChangeDto.cs

@@ -0,0 +1,25 @@
+using Model.Entity.Asset;
+
+namespace Model.Dto.Asset
+{
+    /// <summary>
+    /// 设备状态变更请求 DTO（POST api/asset/equipment/{id}/status 入参）
+    /// </summary>
+    public class EquipmentStatusChangeDto
+    {
+        /// <summary>
+        /// 目标状态（必填）
+        /// </summary>
+        public EquipmentStatusEnum Status { get; set; }
+
+        /// <summary>
+        /// 操作人
+        /// </summary>
+        public string? Operator { get; set; }
+
+        /// <summary>
+        /// 变更原因/备注
+        /// </summary>
+        public string? Remark { get; set; }
+    }
+}

Model/Dto/Asset/EquipmentStatusRecordDto.cs

@@ -16,8 +16,8 @@ namespace Model.Dto.Asset
         /// <summary>创建时间</summary>
         public DateTime? CreateTime { get; set; }
 
-        /// <summary>设备Id（关联 EquipmentEntity.Id）</summary>
-        public long EquipmentId { get; set; }
+        /// <summary>设备Id（关联 EquipmentEntity.Id，雪花 Id 转 string 防精度丢失）</summary>
+        public string EquipmentId { get; set; }
 
         /// <summary>变更前状态</summary>
         public EquipmentStatusEnum FromStatus { get; set; }