refactor: 完善枚举系统与状态类型转换，新增枚举管理接口

1. 为所有枚举添加Description特性用于中文描述
2. 移除实体类中冗余的状态字段注释与定义
3. 将所有枚举状态参数改为int类型转换，统一数据交互格式
4. 新增系统管理枚举查询接口与实现，支持获取所有枚举元数据
5. 调整宠物服务模板状态更新接口参数类型

QYZH.InteractiveMagazine.Service/SystemManagementService.cs

@@ -0,0 +1,73 @@
+using System.ComponentModel;
+using System.Reflection;
+using Microsoft.Extensions.Logging;
+using QYZH.InteractiveMagazine.IService;
+using QYZH.InteractiveMagazine.Models.Dto.SystemManagement;
+
+namespace QYZH.InteractiveMagazine.Service;
+
+/// <summary>
+/// 系统管理服务实现
+/// </summary>
+public class SystemManagementService : ISystemManagementService
+{
+    private readonly ILogger<SystemManagementService> _logger;
+
+    public SystemManagementService(ILogger<SystemManagementService> logger)
+    {
+        _logger = logger;
+    }
+
+    public Task<List<EnumInfoOutput>> GetAllEnumsAsync()
+    {
+        _logger.LogInformation("开始获取所有枚举信息");
+
+        var enumAssembly = typeof(QYZH.InteractiveMagazine.Models.Enum.AdminUserStatusEnum).Assembly;
+        var enumNamespace = "QYZH.InteractiveMagazine.Models.Enum";
+
+        var enumTypes = enumAssembly.GetTypes()
+            .Where(t => t.IsEnum && t.Namespace == enumNamespace)
+            .OrderBy(t => t.Name)
+            .ToList();
+
+        var result = new List<EnumInfoOutput>();
+
+        foreach (var enumType in enumTypes)
+        {
+            var enumInfo = new EnumInfoOutput
+            {
+                EnumName = enumType.Name
+            };
+
+            var fields = Enum.GetValues(enumType)
+                .Cast<object>()
+                .Select(value => new
+                {
+                    Name = Enum.GetName(enumType, value),
+                    Value = Convert.ToInt32(value),
+                    Field = enumType.GetField(value.ToString()!)
+                })
+                .ToList();
+
+            foreach (var field in fields)
+            {
+                var description = field.Field?
+                    .GetCustomAttribute<DescriptionAttribute>()?
+                    .Description;
+
+                enumInfo.Items.Add(new EnumItemDto
+                {
+                    Name = field.Name!,
+                    Value = field.Value,
+                    Description = description
+                });
+            }
+
+            result.Add(enumInfo);
+        }
+
+        _logger.LogInformation("获取枚举信息完成，共 {Count} 个枚举", result.Count);
+
+        return Task.FromResult(result);
+    }
+}